XC6420 Series

150mA Small Dual LDO Regulator with ON/OFF Switch ETR0352-010

■GENERAL DESCRIPTION
The XC6420 series is a small dual CMOS LDO regulator with 2-channel 150mA outputs. The series features high speed, high
accuracy, high ripple rejection and low dropout voltage. The series is capable of high density board installation by the small
package of two low on-resistance regulators. Each output voltage is internally set in a range from 1.2V to 3.6V in increments of
0.05V with ±2% accuracy.
The EN function controls the two regulators on/off independently. In the stand-by mode, the electric charge at the output
capacitor CL is discharged via the internal switch and as a result the VOUT pin quickly returns to the VSS level.
The series is also compatible with low ESR ceramic capacitors. The high level of output stability is maintained even during
frequent load fluctuations, due to the excellent transient response performance. The two regulators are completely isolated so
that a cross talk during load fluctuations is minimized.

■APPLICATIONS ■FEATURES
● Smart phones / Mobile phones Maximum Output Current : 150mA
Operating Voltage Range : 1.6V ~ 5.5V
● Portable game consoles
Output Voltage : 1.2V ~ 3.6V (±2%) 0.05V increments
● Digital audio equipments
Dropout Voltage : 190mV ＠IOUT=150mA (VOUT=3.3V)
● Digital still cameras / Camcorders Low Power Consumption : 55μA / ch (TYP.)
Stand-by Current : 0.1μA
Ripple Rejection : 75dB@1kHz
EN Function : Active High
CL High Speed Auto Discharge
Protection Circuit : Current Limit 250mA (TYP.)
Short Circuit 50mA (TYP.)
Output Capacitor : 1.0μF Ceramic Capacitor
Operating Ambient Temperature : -40℃ ~ 85℃
Packages : SOT-26
USPN-6
USP-6B04
Environmentally Friendly : EU RoHS Compliant, Pb Free

■TYPICAL APPLICATION CIRCUITS ■TYPICAL PERFORMANCE

CHARACTERISTICS
EN1 6.
Ripple Rejection
1.VOUT1
VIN 5. CL :1uF
2.VOUT2 (ceramic)
CIN :1uF EN2 4.
3.VSS CL :1uF XC6420(VOUT=1.8V)
(ceramic) (ceramic)
USP-6B04 VIN=3.0V+0.5Vp- pAC, Ta=25℃
(BOTTOM VIEW) CIN=0.1μF(ceramic), CL =1.0μF(ceramic)
100
Ripple Rejection Rate : RR (dB)

80
EN1 VOUT1 EN1 3 4 VSS
1 6
CL :1uF VIN 2 5 VOUT1 60
VIN VSS (ceramic)
2 5
CIN :1uF EN2 1 6 VOUT2
CIN :1uF
3 4
VOUT2
( ceramic) 40 IOUT=0.1mA
(ceramic)
CL :1uF IOUT=1mA
(ceramic)
EN2 20 IOUT=30mA
SOT-26 CL :1uF CL :1uF IOUT=100mA
(TOP VIEW) ( ceramic) (ceramic )
USPN-6 0
( BOTTOM VIEW) 0.1 1 10 100 1000
Ripple Frequency : f (kHz)

1/23
This datasheet has been downloaded from http://www.digchip.com at this page
 XC6420 Series

■PIN CONFIGURATION

VOUT1 VSS VOUT2

6 5 4

VOUT2 6 1 EN2 EN1 6 1 VOUT1

VOUT1 5 2 VIN VIN 5 2 VOUT2

VSS 4 3 EN1 EN2 4 3 VSS

1 2 3
EN1 VIN EN2

SOT-26 USPN-6 USP-6B04

(TOP VIEW) (BOTTOM VIEW) (BOTTOM VIEW)

■PIN ASSIGNMENT

PIN NUMBER

PIN NAME FUNCTIONS

SOT-26 USPN-6 USP-6B04

1 3 6 EN1 ON/OFF Control 1

2 2 5 VIN Power Input
3 1 4 EN2 ON/OFF Control 2
4 6 2 VOUT2 Output 2
5 4 3 VSS Ground
6 5 1 VOUT1 Output 1

■PIN FUNCTION ASSIGNMENT

PIN NAME SIGNAL STATUS
L Stand-by
EN H Active
OPEN Stand-by ※
H = High Level , L = Low Level
※An internal pull-down resister maintains the EN pin voltage to be low.

2/23
 XC6420
Series

■ PRODUCT CLASSIFICATION
Ordering Information

XC6420①②③④⑤⑥-⑦(*1)
DESIGNATOR ITEM SYMBOL DESCRIPTION
①② Type AB Refer to Selection Guide
③④ Output Voltage 01 ~ See the chart below
MR-G SOT-26 (3,000pcs/Reel)
⑤⑥-⑦ (*1)
Packages (Order Unit) 7R-G USPN-6 (5,000pcs/Reel)
DR-G USP-6B04 (5,000pcs/Reel)
(*1)
The “-G” suffix denotes Halogen and Antimony free as well as being fully EU RoHS compliant.

●Selection Guide

CURRENT EN PULL-DOWN CL
TYPE
LIMITTER RESISTOR DISCHARGE

AB Yes Yes Yes

3/23
 XC6420 Series

DESIGNATOR ③④

③④ VR1(V) VR2(V) ③④ VR1(V) VR2(V) ③④ VR1(V) VR2(V)

01 1.20 1.20 34 2.80 3.00 67 2.75 2.75
02 1.20 1.50 35 2.80 3.30 68 2.50 1.80
03 1.20 2.50 36 1.20 3.60 69 1.80 1.35
04 1.20 2.85 37 3.60 1.20 70 1.30 2.30
05 1.20 3.00 38 1.20 2.80 71 3.10 1.80
06 1.20 3.30 39 3.30 2.00 72 3.00 2.60
07 1.50 1.50 40 3.00 3.30 73 1.80 2.90
08 1.50 1.80 41 3.30 3.30 74 3.30 2.20
09 1.50 2.50 42 1.30 1.50 75 1.20 1.40
10 1.50 2.85 43 2.60 2.80 76 1.90 3.00
11 1.50 3.00 44 3.10 3.30 77 2.00 2.70
12 1.50 3.30 45 1.50 2.60 78 2.80 1.80
13 1.80 1.80 46 2.60 3.30 79 1.80 3.60
14 1.80 2.50 47 3.40 3.40 80 3.60 2.70
15 2.85 2.85 48 2.85 2.60
16 1.80 2.85 49 3.30 1.80
17 1.80 3.00 50 1.80 1.20
18 3.00 1.80 51 3.10 3.10
19 1.80 3.30 52 1.50 3.10
20 2.50 2.50 53 3.30 2.80
21 2.50 2.80 54 3.00 2.80
22 2.50 2.85 55 3.30 3.00
23 3.30 1.50 56 3.60 3.60
24 2.50 3.00 57 3.30 3.10
25 2.50 3.30 58 3.10 3.00
26 2.85 3.00 59 3.10 2.90
27 2.85 3.30 60 3.10 2.50
28 3.00 3.00 61 3.00 2.90
29 1.20 1.80 62 3.00 2.50
30 1.30 2.80 63 1.80 1.90
31 1.50 2.80 64 1.80 1.85
32 1.80 2.80 65 1.70 1.70
33 2.80 2.80 66 2.70 2.70
For other output voltage combinations, please contact your local Torex sales office or representative.

4/23
 XC6420
Series

■BLOCK DIAGRAMS
XC6420ABｘｘｘｘseries

VOUT1

CFB1 R11
Current
Limit Rdischarge

+
Error
Amp
-
ON/OFF
EN1 R12
Control
Voltage
Reference

VIN VSS

VOUT2

CFB2 R21
Current
Limit Rdischarge

+
Error
Amp
-
ON/OFF
EN2 R22
Control
Voltage
Reference

* Diodes inside the circuits are ESD protection diodes and parasitic diodes.

■ABSOLUTE MAXIMUM RATINGS

PARAMETER SYMBOL RATINGS UNITS
Input Voltage VIN Vss - 0.3 ~ 7.0 V
Output Voltage 1 / Output Voltage 2 VOUT1 /VOUT2 VSS - 0.3 ~ VIN + 0.3 V
EN1/EN2 Input Voltage VEN1 /VEN2 VSS - 0.3 ~ 7.0 V
250
SOT-26
600 (40mm x 40mm Standard board) (*1)
Power Dissipation
Pd 100 mW
(Ta=25℃) USPN-6
600 (40mm x 40mm Standard board) (*1)

USP-6B04 600 (40mm x 40mm Standard board) (*1)

Operating Ambient Temperature Topr -40 ~ 85 ℃
Storage Temperature Tstg -55 ~ 125 ℃
(*1)
This power dissipation figure shown is PCB mounted and is for reference only.
The mounting condition is please refer to PACKAGING INFORMATION.

5/23
 XC6420 Series
■ELECTRICAL CHARACTERISTICS
●XC6420 series
Regulator1, Regulator2 Ta=25℃

PARAMETER SYMBOL CONDITIONS MIN. TYP. MAX. UNITS CIRCUITS

VOUT(T) VOUT(T)
Output Voltage VOUT(E) (*2) VEN =VIN, IOUT =10mA ×0.98 VOUT(T) (*4) ×1.02 V ①
(*3) (*3)

Maximum Output
IOUTMAX VEN =VIN 150 - - mA ①
Current
VEN =VIN
Load Regulation ΔVOUT - 25 45 mV ①
0.1mA≦IOUT≦150mA
Dropout Voltage Vdif IOUT =150mA, VEN =VIN See “OUTPUT VOLTAGE CHART” mV ①
VEN =VIN
Supply Current ISS - 55 105 μA ②
IOUT =0mA
Stand-by Current ISTB VEN =VSS - 0.01 0.1 μA ②
2.5V≦VIN≦5.0V
（V OUT(T)≦2.0V）
ΔVOUT/ VEN=VIN, IOUT =30mA
Line Regulation - 0.02 0.1 %/V ①
(ΔVIN・VOUT) VOUT(T)+0.5V≦VIN≦5.5V
（V OUT(T)≧2.05V）
VEN=VIN, IOUT =30mA
Input Voltage VIN - 1.6 - 5.5 V ①
Output Voltage
ΔVOUT/
Temperature VEN =VIN, IOUT=10mA ppm
(ΔTopr・ - ±100 - ①
Characteristics -40℃≦Ta≦85℃ /℃
VOUT)
(R&D Value)
VEN =VIN
Power Supply
PSRR VIN{VOUT(T)+1.0}+0.5Vp-pAC - 75 - dB ③
Rejection Ratio
IOUT =30mA, f=1kHz
Limit Current ILIM VEN =VIN 150 250 - mA ①
VEN =VIN
Short Current ISHORT - 50 - mA ①
VOUT=VSS
EN”H”Level Voltage VENH - 1.0 - 5.5 V ①
EN”L”Level Voltage VENL - - - 0.3 V ①
EN”H”Level Current IENH VEN =VIN =5.5V 2.5 6.0 9.1 μA ①
EN”L”Level Current IENL VEN =VSS -0.1 - 0.1 μA ①
VIN =5.5V, VEN =VSS
CL Discharge Resistor RDCHG - 300 - Ω ①
V OUT =2.0V

NOTE:
Unless otherwise stated, VIN=VOUT(T) +1V, IOUT=1mA, CIN=CL=1.0μF.
（*1）VOUT(E) : Effective output voltage
（*2）Characteristics of the actual VOUT(E) by setting output voltage is shown in the voltage chart.
（*3）VOUT(T): Nominal output voltage
（*4）Vdif＝{VIN1－VOUT1}
VIN1: The input voltage when VOUT1 appears as input voltage is gradually decreased.
VOUT1: A voltage equal to 98% of the output voltage whenever an amply stabilized IOUT{VOUT(T)+1.0V} is input.
（*5）Each channel is measured when the other channel is turned off (VEN=VSS).

6/23
 XC6420
Series

■OUTPUT VOLTAGE CHART

NOMINAL NOMINAL
OUTPUT DROPOUT OUTPUT DROPOUT
OUTPUT OUTPUT
VOLTAGE VOLTAGE VOLTAGE VOLTAGE
VOLTAGE VOLTAGE
(V) (mV) (V) (mV)
(V) (V)

VOUT(E) Vdif VOUT(E) Vdif

VOUT(T) VOUT(T)

MIN. MAX. TYP. MAX. MIN. MAX. TYP. MAX.

1.200 1.176 1.224 2.450 2.401 2.499 280 390
560 710
1.250 1.225 1.275 2.500 2.450 2.550
1.300 1.274 1.326 2.550 2.499 2.601
530 600
1.350 1.323 1.377 2.600 2.548 2.652
1.400 1.372 1.428 2.650 2.597 2.703
1.450 1.421 1.479 2.700 2.646 2.754
460 520 200 340
1.500 1.470 1.530 2.750 2.695 2.805
1.550 1.519 1.581 2.800 2.744 2.856
1.600 1.568 1.632 2.850 2.793 2.907
1.650 1.617 1.683 2.900 2.842 2.958
380 470
1.700 1.666 1.734 2.950 2.891 3.009
1.750 1.715 1.785 3.000 2.940 3.060
1.800 1.764 1.836 3.050 2.989 3.111
1.850 1.813 1.887 3.100 3.038 3.162
300 450
1.900 1.862 1.938 3.150 3.087 3.213
1.950 1.911 1.989 3.200 3.136 3.264
2.000 1.960 2.040 3.250 3.185 3.315
2.050 2.009 2.091 3.300 3.234 3.366 190 270
2.100 2.058 2.142 3.350 3.283 3.417
2.150 2.107 2.193 3.400 3.332 3.468
2.200 2.156 2.244 280 390 3.450 3.381 3.519
2.250 2.205 2.295 3.500 3.430 3.570
2.300 2.254 2.346 3.550 3.479 3.621
2.350 2.303 2.397 3.600 3.528 3.672
2.400 2.352 2.448

7/23
 XC6420 Series
■OPERATIONAL EXPLANATION
The voltage divided by resistors Rx1 & Rx2 is compared with the internal reference voltage by the error amplifier. The P-
channel MOSFET connected to the VOUT pin is then driven by the subsequent output signal. The output voltage at the VOUT
pin is controlled & stabilized by a system of negative feedback. The current limit circuit and short protect circuit operate in
relation to the level of output current. Further, the IC's internal circuitry can be shutdown via the EN pin's signal.

XC6420ABｘｘｘｘseries

VOUT1

CFB1 R11
Current
Limit Rdischarge

+
Error
Amp
-
ON/OFF
EN1 R12
Control
Voltage
Reference

VIN VSS

VOUT2

CFB2 R21
Current
Limit Rdischarge

+
Error
Amp
-
ON/OFF
EN2 R22
Control
Voltage
Reference

<Low ESR Capacitor>

The XC6420 needs an output capacitor (CL) for phase compensation. In order to ensure the effectiveness of the phase
compensation, we suggest that an output capacitor (CL) is connected as close as possible to the output pin (VOUT) and the
VSS pin. Please use an output capacitor with a capacitance value of at least 1.0μF. Also, please place 1.0μF input
capacitor CL between VIN and VSS pins for stabilizing input supply voltage.

<Current Limiter, Short-Circuit Protection>

The XC6420 includes a combination of a fixed current limiter circuit & a foldback circuit, which aid the operations of the
current limiter and circuit protection. When the load current reaches the current limit level, the fixed current limiter circuit
operates and output voltage drops. As a result of this drop in output voltage, the foldback circuit operates, output voltage
drops further and output current decreases. When the output pin is shorted, a current of about 50mA flows.

<EN Pin>
The IC's internal circuitry can be shutdown via the signal from the EN pin with the XC6420 series. In shutdown mode, the
series enables the electric charge at the output capacitor CL to be discharged via the internal switch between VOUT pin and
VSS pin, and as a result the VOUT pin quickly returns to the VSS level.
The EN pin is internally pulled down by a resistor. Please note that input current through a pull-down resistor exists.

<CL Auto-Discharge Function>

XC6420 series can quickly discharge the electric charge at the output capacitor (CL), when a low signal to the EN pin, which
enables a whole IC circuit put into OFF state, is inputted via the N-channel transistor located between the VOUT pin and the
VSS pin (cf. BLOCK DIAGRAM). The CL discharge resistance is set to 300Ω when VIN is 5.5V (TYP.) and VOUT is 2.0V (TYP.).
Moreover, discharge time of the output capacitor (CL) is set by the CL auto-discharge resistance and the output capacitor
(CL). By setting time constant of a CL auto-discharge resistance value [RDCHG] and an output capacitor value (CL) as τ(τ
=C x R), the output voltage after discharge via the N channel transistor is calculated by the following formulas.

V = VOUT(E) x e –t/τ, or t=τIn ( VOUT(E) / V )

V : Output voltage after discharge, VOUT(E) : Output voltage, t: Discharge time,

τ: CL auto-discharge resistance RDCHG×Output capacitor (CL) value C

8/23
 XC6420
Series

■NOTES ON USE
1． For temporary, transitional voltage drop or voltage rising phenomenon, the IC is liable to malfunction should the ratings
be exceeded.

2. Torex places an importance on improving our products and its reliability.

However, by any possibility, we would request user fail-safe design and post-aging treatment on system or equipment.

3. Where wiring impedance is high, operations may become unstable due to the noise and/or phase lag depending on
output current. Please strengthen VIN and VSS wiring in particular.

4. Please wire the input capacitor (CIN) and the output capacitor (CL) as short and close to the IC as possible.

9/23
 XC6420 Series

■TEST CIRCUITS
●Circuit ①

VIN CL=1uF IOUT1

(ceramic)
A EN1 VOUT1 A

CIN =1uF
V
(ceramic)
V
IOUT2

A EN2 VOUT2 A

VSS
V

CL=1uF
(ceramic)

●Circuit ②

VIN

EN1 VOUT1
CIN =1uF
(ceramic) CL =1uF
V (ceramic)

EN2 VOUT2

VSS
CL =1uF
A (ceramic)

●Circuit ③

VIN CL=1uF IOUT1

CIN =1uF
(ceramic) (ceramic)
EN1 VOUT1 A

V
V
IOUT2

EN2 VOUT2 A

VSS
V

CL =1uF
(ceramic)

10/23
 XC6420
Series

■TYPICAL PERFORMANCE CHARACTERISTICS

* EN Voltage condition: Unless otherwise stated, VEN=VIN.

(1) OutputVoltage vs. OutputCurrent

XC6420(VOUT=1.2V) XC6420(VOUT=1.2V)
Ta=25℃
CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
VIN=2.2V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
1.4 1.4

1.2 1.2

OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

1.0 1.0

0.8 0.8

0.6 0.6
Ta=85℃ VIN=1.6V
0.4 0.4 VIN=2.2V
Ta=25℃
VIN=2.7V
0.2 Ta=-40℃ 0.2
VIN=5.5V

0.0 0.0
0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350
OutputCurrent : IOUT (mA) OutputCurrent : IOUT (mA)

XC6420(VOUT=1.8V) XC6420(VOUT=1.8V)
Ta=25℃
VIN=2.8V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
2.0 2.0
1.8 1.8
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

1.6 1.6
1.4 Ta=85℃ 1.4 VIN=1.9V
VIN=2.3V
1.2 Ta=25℃
1.2 VIN=2.8V
1.0 1.0 VIN=3.3V
Ta=-40℃ VIN=5.5V
0.8 0.8
0.6 0.6
0.4 0.4
0.2 0.2
0.0 0.0
0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350
OutputCurrent : IOUT (mA) OutputCurrent : IOUT (mA)

XC6420(VOUT=2.5V) XC6420(VOUT=2.5V)
Ta=25℃
VIN=3.5V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
3.0 3.0

2.5 2.5
OutputVoltage : VOUT (V)
OutputVoltage : VOUT (V)

VIN=2.6V
2.0 Ta=85℃ 2.0 VIN=3V
Ta=25℃ VIN=3.5V
1.5 1.5 VIN=4V
Ta=-40℃ VIN=5.5V

1.0 1.0

0.5 0.5

0.0 0.0
0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350
OutputCurrent : IOUT (mA) OutputCurrent : IOUT (mA)

11/23
 XC6420 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(1) OutputVoltage vs. OutputCurrent

XC6420(VOUT=3.6V) XC6420(VOUT=3.6V)
Ta=25℃
VIN=4.6V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
4.0 4.0
3.6 3.6
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

3.2 3.2
2.8 Ta=85℃ 2.8 VIN=3.7V
VIN=4.1V
2.4 Ta=25℃ 2.4 VIN=4.6V
2.0 Ta=-40℃
2.0 VIN=5.1V
VIN=5.5V
1.6 1.6
1.2 1.2
0.8 0.8
0.4 0.4
0.0 0.0
0 50 100 150 200 250 300 350 0 50 100 150 200 250 300 350
OutputCurrent : IOUT (mA) OutputCurrent : IOUT (mA)

(2) OutputVoltage vs. InputVoltage

XC6420(VOUT=1.2V) XC6420(VOUT=1.2V)
Ta=25℃ Ta=25℃
CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
1.4 1.30

1.2
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

1.25
1.0

0.8 1.20

0.6 1.15
IOUT=1mA
0.4 IOUT=1mA
IOUT=10mA
IOUT=10mA
1.10 IOUT=30mA
0.2 IOUT=30mA
IOUT=100mA
IOUT=100mA
0.0 1.05
0.0 1.0 2.0 3.0 4.0 5.0 6.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
InputVoltage : VIN (V) InputVoltage : VIN (V)

XC6420(VOUT=1.8V) XC6420(VOUT=1.8V)
Ta=25℃ Ta=25℃
CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
2.0 1.90
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

1.85
1.5

1.80
1.0
1.75
IOUT=1mA IOUT=1mA
0.5 IOUT=10mA IOUT=10mA
IOUT=30mA 1.70 IOUT=30mA
IOUT=100mA IOUT=100mA

0.0 1.65
0.0 1.0 2.0 3.0 4.0 5.0 6.0 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5
InputVoltage : VIN (V) InputVoltage : VIN (V)

12/23
 XC6420
Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(2) OutputVoltage vs. InputVoltage

XC6420(VOUT=2.5V) XC6420(VOUT=2.5V)
Ta=25℃ Ta=25℃
CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
3.0 2.60

2.5
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

2.55
2.0
2.50
1.5
2.45
1.0 IOUT=1mA IOUT=1mA
IOUT=10mA IOUT=10mA
0.5 IOUT=30mA
2.40 IOUT=30mA
IOUT=100mA IOUT=100mA

0.0 2.35
0.0 1.0 2.0 3.0 4.0 5.0 6.0 3.0 3.5 4.0 4.5 5.0 5.5
InputVoltage : VIN (V) InputVoltage : VIN (V)

XC6420(VOUT=3.6V) XC6420(VOUT=3.6V)
Ta=25℃ Ta=25℃
CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)
4.0 3.70
3.5
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

3.65
3.0
2.5 3.60
2.0
1.5 3.55
IOUT=1mA IOUT=1mA
1.0 IOUT=10mA IOUT=10mA
IOUT=30mA
3.50
IOUT=30mA
0.5 IOUT=100mA IOUT=100mA
0.0 3.45
0.0 1.0 2.0 3.0 4.0 5.0 6.0 4.0 4.5 5.0 5.5
InputVoltage : VIN (V) InputVoltage : VIN (V)

(3) DropoutVoltage vs. OutputCurrent

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)

CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

0.8 0.5
0.7
Dropout Voltage : Vdif (V)

Dropout Voltage : Vdif (V)

0.4
0.6
0.5 ※ Below the minimum operating Voltage
0.3
0.4
0.3 0.2

0.2 Ta=85℃ Ta=85℃

Ta=25℃
0.1
Ta=25℃
0.1
Ta=-40℃ Ta=-40℃
0.0 0.0
0 25 50 75 100 125 150 0 25 50 75 100 125 150
OutputCurrent : IOUT (mA) OutputCurrent : IOUT (mA)

13/23
 XC6420 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(3) DropoutVoltage vs. OutputCurrent

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)

CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

0.5 0.5
Ta=85℃ Ta=85℃
Dropout Voltage : Vdif (V)

Dropout Voltage : Vdif (V)

0.4 Ta=25℃
0.4 Ta=25℃

Ta=-40℃ Ta=-40℃
0.3 0.3

0.2 0.2

0.1 0.1

0.0 0.0
0 25 50 75 100 125 150 0 25 50 75 100 125 150
OutputCurrent : IOUT (mA) OutputCurrent : IOUT (mA)

(4) SupplyCurrent vs. InputVoltage

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)

CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

125 125
SupplyCurrent : ISS (μA)
SupplyCurrent : ISS (μA)

100 100

75 75

50 50

Ta=85℃ Ta=85℃
25 25 Ta=25℃
Ta=25℃
Ta=-40℃ Ta=-40℃

0 0
0 1 2 3 4 5 6 0 1 2 3 4 5 6
InputVoltage : VIN (V) InputVoltage : VIN (V)

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)

CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

125 125
SupplyCurrent : ISS (μA)

SupplyCurrent : ISS (μA)

100 100

75 75

50 50

Ta=85℃ Ta=85℃
25 25
Ta=25℃ Ta=25℃
Ta=-40℃ Ta=-40℃
0 0
0 1 2 3 4 5 6 0 1 2 3 4 5 6
InputVoltage : VIN (V) InputVoltage : VIN (V)

14/23
 XC6420
Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(5) OutputVoltage vs. AmbientTemperature

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)

VIN=2.2V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic) VIN=2.8V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

1.30 1.90
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

1.25 1.85

1.20 1.80

IOUT=1mA IOUT=1mA
1.15 IOUT=10mA 1.75 IOUT=10mA

IOUT=30mA IOUT=30mA

IOUT=100mA IOUT=100mA

1.10 1.70
-50 -25 0 25 50 75 100 -50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃) AmbientTemperature : Ta (℃)

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)

VIN=3.5V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic) VIN=4.6V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

2.60 3.70
OutputVoltage : VOUT (V)

OutputVoltage : VOUT (V)

2.55 3.65

2.50 3.60

IOUT=1mA IOUT=1mA
2.45 IOUT=10mA 3.55 IOUT=10mA
IOUT=30mA IOUT=30mA
IOUT=100mA IOUT=100mA
2.40 3.50
-50 -25 0 25 50 75 100 -50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃) AmbientTemperature : Ta (℃)

(6) SupplyCurrent vs. AmbientTemperature (7) EN Threshold Voltage vs. AmbientTemperature

XC6420 XC6420

VIN=VOUT+1.0V, CIN=1.0μF(ceramic), CL=1.0μF(ceramic) CIN=1.0μF(ceramic), CL=1.0μF(ceramic)

100 1.2
EN Threshold Voltage : VEN (V)

90
1.0
SupplyCurrent : ISS (μA)

80
70 0.8
60
0.6
50
40 VOUT=1.2V 0.4
VOUT=1.8V EN"H"LEVEL
30 VOUT=2.5V
VOUT=3.6V
0.2 EN"L"LEVEL
20
10 0.0
-50 -25 0 25 50 75 100 -50 -25 0 25 50 75 100
AmbientTemperature : Ta (℃) AmbientTemperature : Ta (℃)

15/23
 XC6420 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(8) Rising Response Time

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)
VIN=0V→2.2V, tr=5μS, Ta=25℃ VIN=0V→2.8V, tr=5μS, Ta=25℃
CIN=0.1μF(ceramic), CL=1.0μF(ceramic) CIN=0.1μF(ceramic), CL=1.0μF(ceramic)
3.0 3.0 3.0 3.0
Input Voltage Input Voltage
2.0 2.5 2.0 2.5

Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

IOUT=0.1mA
Input Voltage : VIN (V)

Input Voltage : VIN (V)

IOUT=1mA
1.0 IOUT=30mA 2.0 1.0 Output Voltage 2.0
IOUT=100mA
0.0 1.5 0.0 1.5
Output Voltage

-1.0 1.0 -1.0 1.0

IOUT=0.1mA
IOUT=1mA
-2.0 0.5 -2.0 IOUT=30mA 0.5
IOUT=100mA
-3.0 0.0 -3.0 0.0
Time (40μs/div) Time (40μs/div)

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)
VIN=0V→3.5V, tr=5μS, Ta=25℃ VIN=0V→4.6V, tr=5μS, Ta=25℃
CIN=0.1μF(ceramic), CL=1.0μF(ceramic) CIN=0.1μF(ceramic), CL=1.0μF(ceramic)
6.0 6.0 6.0 6.0
Input Voltage

4.0 Input Voltage 5.0 4.0 5.0

Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Input Voltage : VIN (V)

Input Voltage : VIN (V)

IOUT=0.1mA
2.0 IOUT=1mA 4.0 2.0 Output Voltage 4.0
IOUT=30mA
IOUT=100mA
0.0 Output Voltage 3.0 0.0 3.0

-2.0 2.0 -2.0 2.0

IOUT=0.1mA
IOUT=1mA
-4.0 1.0 -4.0 IOUT=30mA 1.0
IOUT=100mA
-6.0 0.0 -6.0 0.0
Time (40μs/div) Time (40μs/div)

(9) Input Transient Response

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)
VIN=2.2V⇔3.2V, tr=tf=5μS, Ta=25℃ VIN=2.8V⇔3.8V, tr=tf=5μS, Ta=25℃
CIN=0.1μF(ceramic), CL=1.0μF(ceramic) CIN=0.1μF(ceramic), CL=1.0μF(ceramic)
4.2 1.35 4.8 1.95
Input Voltage Input Voltage
3.2 1.30 3.8 1.90
Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Input Voltage : VIN (V)

Input Voltage : VIN (V)

2.2 1.25 2.8 1.85

Output Voltage Output Voltage

1.2 1.20 1.8 1.80

0.2 1.15 0.8 1.75

IOUT=0.1mA IOUT=0.1mA
IOUT=1mA IOUT=1mA
-0.8 1.10 -0.2 1.70
IOUT=30mA IOUT=30mA
IOUT=100mA IOUT=100mA
-1.8 1.05 -1.2 1.65
Time (100μs/div) Time (100μs/div)

16/23
 XC6420
Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(9) Input Transient Response

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)
VIN=3.5V⇔4.5V, tr=tf=5μS, Ta=25℃ VIN=4.6V⇔5.5V, tr=tf=5μS, Ta=25℃
CIN=0.1μF(ceramic), CL=1.0μF(ceramic) CIN=0.1μF(ceramic), CL=1.0μF(ceramic)
5.5 2.65 6.5 3.75
Input Voltage Input Voltage
4.5 2.60 5.5 3.70

Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Input Voltage : VIN (V)

Input Voltage : VIN (V)

3.5 2.55 4.5 3.65
Output Voltage Output Voltage

2.5 2.50 3.5 3.60

1.5 2.45 2.5 3.55

IOUT=0.1mA IOUT=0.1mA
IOUT=1mA IOUT=1mA
0.5 2.40 1.5 3.50
IOUT=30mA IOUT=30mA
IOUT=100mA IOUT=100mA
-0.5 2.35 0.5 3.45
Time (100μs/div) Time (100μs/div)

(10) Load Transient Response

XC6420(VOUT=1.2V) XC6420(VOUT=1.2V)
IOUT=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃ IOUT=0.1mA⇔150mA, tr=tf=0.5μS, Ta=25℃
VIN=2.2V, CIN=CL=1.0μF(ceramic) VIN=2.2V, CIN=CL=1.0μF(ceramic)
1.30 500 1.30 750
Output Current : IOUT (mA)

Output Current : IOUT (mA)

1.25 400 1.25 600
Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Output Voltage Output Voltage

1.20 300 1.20 450

1.15 200 1.15 300

Output Current Output Current
100mA 150mA
1.10 100 1.10 150

1mA 0.1mA
1.05 0 1.05 0
Time (20μs/div) Time (100μs/div)

XC6420(VOUT=1.8V) XC6420(VOUT=1.8V)
IOUT=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃ IOUT=0.1mA⇔150mA, tr=tf=0.5μS, Ta=25℃
VIN=2.8V, CIN=CL=1.0μF(ceramic) VIN=2.8V, CIN=CL=1.0μF(ceramic)
1.90 500 1.90 750
Output Current : IOUT (mA)

Output Current : IOUT (mA)

1.85 400 1.85 600

Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Output Voltage Output Voltage

1.80 300 1.80 450

1.75 200 1.75 300

Output Current Output Current
100mA 150mA
1.70 100 1.70 150

1mA 0.1mA
1.65 0 1.65 0
Time (20μs/div) Time (100μs/div)

17/23
 XC6420 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(10) Load Transient Response

XC6420(VOUT=2.5V) XC6420(VOUT=2.5V)
IOUT=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃ IOUT=0.1mA⇔150mA, tr=tf=0.5μS, Ta=25℃
VIN=3.5V, CIN=CL=1.0μF(ceramic) VIN=3.5V, CIN=CL=1.0μF(ceramic)
2.60 500 2.60 750

Output Current : IOUT (mA)

Output Current : IOUT (mA)

2.55 400 2.55 600
Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Output Voltage Output Voltage

2.50 300 2.50 450

2.45 200 2.45 300

Output Current Output Current
100mA 150mA
2.40 100 2.40 150

1mA 0.1mA
2.35 0 2.35 0
Time (20μs/div) Time (100μs/div)

XC6420(VOUT=3.6V) XC6420(VOUT=3.6V)
IOUT=1mA⇔100mA, tr=tf=0.5μS, Ta=25℃ IOUT=0.1mA⇔150mA, tr=tf=0.5μS, Ta=25℃
VIN=4.6V, CIN=CL=1.0μF(ceramic) VIN=4.6V, CIN=CL=1.0μF(ceramic)
3.70 500 3.70 750
Output Current : IOUT (mA)

Output Current : IOUT (mA)

3.65 400 3.65 600
Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

Output Voltage Output Voltage

3.60 300 3.60 450

3.55 200 3.55 300

Output Current Output Current
100mA 150mA
3.50 100 3.50 150

1mA 0.1mA
3.45 0 3.45 0
Time (20μs/div) Time (100μs/div)

(11) EN Rising Respose Time

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)
VEN=0V→2.2V, tr=5μS, Ta=25℃ VEN=0V→2.8V, tr=5μS, Ta=25℃
VIN=2.2V, CIN=CL=1.0μF(ceramic) VIN=2.8V, CIN=CL=1.0μF(ceramic)
3.0 3.0 3.0 3.0
EN Input Voltage EN Input Voltage
2.0 2.5 2.0 2.5
EN Input Voltage : VEN (V)

EN Input Voltage : VEN (V)

Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

IOUT=0.1mA
IOUT=1mA
1.0 IOUT=30mA
2.0 1.0 Output Voltage 2.0
IOUT=100mA
0.0 1.5 0.0 1.5
Output Voltage

-1.0 1.0 -1.0 1.0

IOUT=0.1mA
-2.0 0.5 -2.0 IOUT=1mA 0.5
IOUT=30mA
IOUT=100mA
-3.0 0.0 -3.0 0.0
Time (40μs/div) Time (40μs/div)

18/23
 XC6420
Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(11) EN Rising Respose Time

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)
VEN=0V→3.5V, tr=5μS, Ta=25℃ VEN=0V→4.6V, tr=5μS, Ta=25℃
VIN=3.5V, CIN=CL=1.0μF(ceramic) VIN=4.6V, CIN=CL=1.0μF(ceramic)
6.0 6.0 6.0 6.0
EN Input Voltage
EN Input Voltage
4.0 5.0 4.0 5.0
EN Input Voltage : VEN (V)

EN Input Voltage : VEN (V)

Output Voltage : VOUT (V)

Output Voltage : VOUT (V)

IOUT=0.1mA
2.0 IOUT=1mA 4.0 2.0 Output Voltage 4.0
IOUT=30mA
IOUT=100mA
0.0 Output Voltage
3.0 0.0 3.0

-2.0 2.0 -2.0 2.0

IOUT=0.1mA
-4.0 1.0 -4.0 IOUT=1mA 1.0
IOUT=30mA
IOUT=100mA
-6.0 0.0 -6.0 0.0
Time (40μs/div) Time (40μs/div)

(12) Ripple Rejection

( ) ( )
XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)
VIN=3.0V+0.5Vp-pAC, Ta=25℃ VIN=3.0V+0.5Vp-pAC, Ta=25℃
CIN=0.1μF(ceramic), CL=1.0μF(ceramic) CIN=0.1μF(ceramic), CL=1.0μF(ceramic)
100 100
Ripple Rejection Rate : RR (dB)

Ripple Rejection Rate : RR (dB)

80 80

60 60

40 IOUT=0.1mA 40 IOUT=0.1mA
IOUT=1mA IOUT=1mA
20 IOUT=30mA 20 IOUT=30mA
IOUT=100mA IOUT=100mA
0 0
0.1 1 10 100 1000 0.1 1 10 100 1000
Ripple Frequency : f (kHz) Ripple Frequency : f (kHz)

XC6420(VOUT=2.5V) XC6420(VOUT=3.6V)
VIN=3.5V+0.5Vp-pAC, Ta=25℃ VIN=4.6V+0.5Vp-pAC, Ta=25℃
CIN=0.1μF(ceramic), CL=1.0μF(ceramic) CIN=0.1μF(ceramic), CL=1.0μF(ceramic)
100 100
Ripple Rejection Rate : RR (dB)

Ripple Rejection Rate : RR (dB)

80 80

60 60

40 IOUT=0.1mA 40 IOUT=0.1mA
IOUT=1mA IOUT=1mA
20 IOUT=30mA 20 IOUT=30mA
IOUT=100mA IOUT=100mA

0 0
0.1 1 10 100 1000 0.1 1 10 100 1000
Ripple Frequency : f (kHz) Ripple Frequency : f (kHz)

19/23
 XC6420 Series

■TYPICAL PERFORMANCE CHARACTERISTICS (Continued)

(13) Cross Talk

XC6420(VOUT1=1.2V, VOUT2=1.2V) XC6420(VOUT1=3.3V, VOUT2=3.3V)

IOUT1=1mA⇔150mA, IOUT2=30mA, tr=tf=5μS, Ta=25℃ IOUT1=1mA⇔150mA, IOUT2=30mA, tr=tf=5μS, Ta=25℃
VIN=2.2V, CIN=CL1=CL2=1.0μF(ceramic) VIN=4.6V, CIN=CL1=CL2=1.0μF(ceramic)
1.30 500 3.40 500

Output Current(VR1) : IOUT(mA)

Output Current(VR1) : IOUT(mA)

Output Voltage(VR2) : VOUT(V)

Output Voltage(VR2) : VOUT(V)

1.25 400 3.35 400
Output Voltage(VR2 : 30mA) Output Voltage(VR2 : 30mA)

1.20 300 3.30 300

Output Current Output Current

1.15 （VR1 : 1mA⇔150mA) 200 3.25 （VR1 : 1mA⇔150mA) 200

1.10 100 3.20 100

1.05 0 3.15 0
Time (200μs/div) Time (200μs/div)

(14) Output Noise Density

XC6420(VOUT=1.2V) XC6420(VOUT=1.8V)
VIN=2.2V, Ta=25℃ VIN=2.8, Ta=25℃
CIN=CL=1.0μF(ceramic) CIN=CL=1.0μF(ceramic)
100 100
Output Noise Density : (μV/√Hz)
Output Noise Density : (μV/√Hz)

Frequency-Range ： 0.1～100kHz Frequency-Range ： 0.1～100kHz

Output Noise ： 35.14μVrms Output Noise ： 50.66μVrms
10 10
IOUT=30mA IOUT=30mA

1 1

0.1 0.1

0.01 0.01
0.1 1 10 100 0.1 1 10 100
Frequency : f (kHz) Frequency : f (kHz)

XC6420(VOUT=3.3V)
VIN=5.0V, Ta=25℃
CIN=CL=1.0μF(ceramic)
100
Output Noise Density : (μV/√Hz)

Frequency-Range ： 0.1～100kHz
Output Noise ： 83.87μVrms
10
IOUT=30mA

0.1

0.01
0.1 1 10 100
Frequency : f (kHz)

20/23
 XC6420
Series

■PACKAGING INFORMATION
For the latest package information go to, www.torexsemi.com/technical-support/packages

PACKAGE OUTLINE / LAND PATTERN THERMAL CHARACTERISTICS

SOT-26 SOT-26 PKG Standard Board SOT-26 Power Dissipation

USP-6B04 USP-6B04 PKG Standard Board USP-6B04 Power Dissipation

USPN-6 USPN-6 PKG Standard Board USPN-6 Power Dissipation

21/23
 XC6420 Series

■MARKING RULE

●SOT-26
① represents product series
MARK PRODUCT SERIES
2 XC6420******-G

②③ represents output voltage

ex.)
MARK
PRODUCT SERIES
② ③
0 1 XC6420**01**-G

④⑤ represents production lot number.

01 to 09, 0A to 0Z, 11 to 9Z, A1 to A9, AA to Z9, ZA to ZZ in order.
(G, I, J, O, Q, W excepted)
*No character inversion used.

●USPN-6/USP-6B04
①② represents internal sequential number

③④ represents production lot number.

01 to 09, 0A to 0Z, 11 to 9Z, A1 to A9, AA to Z9, ZA to ZZ in order. USPN-6/USP-6B04
(TOP VIEW)
(G, I, J, O, Q, W excepted)
*No character inversion used.

22/23
 XC6420
Series

1. The product and product specifications contained herein are subject to change without notice to
improve performance characteristics. Consult us, or our representatives before use, to confirm that
the information in this datasheet is up to date.

2. The information in this datasheet is intended to illustrate the operation and characteristics of our
products. We neither make warranties or representations with respect to the accuracy or
completeness of the information contained in this datasheet nor grant any license to any intellectual
property rights of ours or any third party concerning with the information in this datasheet.

3. Applicable export control laws and regulations should be complied and the procedures required by
such laws and regulations should also be followed, when the product or any information contained in
this datasheet is exported.

4. The product is neither intended nor warranted for use in equipment of systems which require
extremely high levels of quality and/or reliability and/or a malfunction or failure which may cause loss
of human life, bodily injury, serious property damage including but not limited to devices or equipment
used in 1) nuclear facilities, 2) aerospace industry, 3) medical facilities, 4) automobile industry and
other transportation industry and 5) safety devices and safety equipment to control combustions and
explosions. Do not use the product for the above use unless agreed by us in writing in advance.

5. Although we make continuous efforts to improve the quality and reliability of our products;
nevertheless Semiconductors are likely to fail with a certain probability. So in order to prevent personal
injury and/or property damage resulting from such failure, customers are required to incorporate
adequate safety measures in their designs, such as system fail safes, redundancy and fire prevention
features.

6. Our products are not designed to be Radiation-resistant.

7. Please use the product listed in this datasheet within the specified ranges.

8. We assume no responsibility for damage or loss due to abnormal use.

9. All rights reserved. No part of this datasheet may be copied or reproduced unless agreed by Torex
Semiconductor Ltd in writing in advance.

TOREX SEMICONDUCTOR LTD.

23/23