TDA8137
DUAL 5.1V REGULATOR WITH DISABLE AND RESET
.. OUTPUT CURRENTS UP TO 1A
FIXED PRECISION OUTPUT VOLTAGES
.. 5.1V ± 2%
OUTPUT 1 WITH RESET FACILITY
. OUTPUT 2 WITH DISABLE BY TTL INPUT
SHORT CIRCUIT PROTECTION AT BOTH
.. OUTPUTS
THERMAL PROTECTION
LOW DROP OUTPUT VOLTAGE
DESCRIPTION
The TDA8137 is a monolithic dual positive voltage HEPTAWATT
regulator designedto provide fixed precision output (Plastic Package)
voltages of 5.1V at currents up to 1A.
ORDER CODE : TDA8137
An internal reset circuit generates a reset pulse
when the output 1 decreases below the regulated
voltage value.
Output 2 can be disabled by TTL input.
Short circuit and thermal protections are included.
PIN CONNECTION (top view)
7 OUTPUT 1
6 OUTPUT 2
5 RESET
4 GROUND
3 DISABLE
2 DELAY CAP
1 INPUT
Tab connected to Pin 4
8137-01.EPS
September 1993 1/5
TDA8137
BLOCK DIAGRAM
IN
1
REFERENCE OUT 1 7 OUT1
5 RESET
PROTECTION RESET CR
2
DELAY
CAPACITOR
DISABLE 3 DISABLE OUT 2 6 OUT2
TDA8137
4
8137-02.EPS
ABSOLUTE MAXIMUM RATINGS
Symbol Parameter Value Unit
VIN DC Input Voltage Pin 1 20 V
VDIS Disable Input Voltage Pin 3 20 V
VRST Output Voltage at Pin 5 20 V
I01, 2 Output Currents Internally Limited
Pt Power Dissipation Internally Limited
8137-04.TBL
TSTG Storage Temperature – 65 to + 150 °C
Tj Junction Temperature 0 to + 150 °C
THERMAL DATA
Symbol Parameter Value Unit
8137-02.TBL
R TH(j-c) Thermal Resistance Junction-case Max. 3 °C/W
Tj Recommended Junction Temperature Max. 0 to + 150 °C
ELECTRICAL CHARACTERISTICS (VIN = 7V ; Tj = 25oC unless otherwise specified)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
V01, 2 Output Voltage I01, 2 = 10mA 5 5.1 5.2 V
7V < VIN < 14V, 5mA < I0 < 750mA 4.9 5.3 V
VI 01, 2 Dropout Voltage I01, 2 = 750mA 1.4 V
I01, 2 = 1A 2 V
∆ V01, 2LI Line Regulation 7V < VIN < 14V, I01, 2 = 200mA 50 mV
∆ V01, 2LO Load Regulation 5mA < I01, 2 < 0.6A 100 mV
IQ Quiescent Current I01 = 10mA, Output 2 Disabled 2 mA
V01RST Reset Threshold Voltage (K = V01) K–0.4 K–.25 K–0.1 V
VRTH Reset Threshold Hysteresis (see circuit description) 20 50 75 mV
tRD Reset Pulse Delay at Pin 5 C e = 100nF (see circuit description) 25 ms
8137-03.TBL
VRL Saturation Volt. at Pin 5 in I5 = 5mA 0.4 V
Reset Condition
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TDA8137
ELECTRICAL CHARACTERISTICS (VIN = 7V ; Tj = 25oC unless otherwise specified) (continued)
Symbol Parameter Test Conditions Min. Typ. Max. Unit
IRH Leakage Current at Pin 5 in Normal Condition V5 = 10V 10 µA
6
K01,2 Output Volt. Thermal Drift ∆Vo ⋅ 10 100 ppm/°C
K0 =
∆T ⋅ VO
Tj = 0 to + 125°C
I01,2SC Short Circ. Output Current VIN = 7V 1.6 A
VIN = 16V, (see note 1) 1 A
VDISH Disable Volt. at Pin 3 High (out 2 active) 2 V
VDISL Disable Volt. at Pin 3 Low (out 2 disabled) 0.8 V
8137-04.TBL
IDIS Disable Bias Current at Pin 3 0V < VDIS < 7V -100 2 µA
Tjsd Junction Temp. for Thermal Shut Down 145 °C
Note 1 : The output short circuit currents are tested one channel at time.
During a short circuit a large consumption of power occurs, anyway the thermal protection circuit guarantees the temperature not over-
comes high value.
Safe permanent short-circuit is only guaranteed for input voltages up to 16V.
Figure 1
10µA
RESET
REF b 5
a -
2.5V +
50 +
OUT 1 7 -
2
REG
Ce
8137-03.EPS
2.5V 0.6V
Figure 2
5.1V
∆VOUT LOW
4.9V
4.85V
RESET
8137-04.EPS
TD TD
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TDA8137
CIRCUIT DESCRIPTION
The TDA8137 is a dual voltage regulator with Reset The Reset circuit checks the voltage at the output
and Disable. 1. If this one goes below VOUT - 0.25V (4.85V Typ.),
The two regulation parts are supplied from one the comparator ”a” (see Figure 1) discharges rap-
voltage reference circuit trimmed by zener zap idly the capacitor Ce and the reset output goes at
during EWS test. Since the supply voltage of this once low. When the voltage at the OUT 1 rises
last is connected at Pin 1 (VIN1), the regulator 2 will above VOUT -0.2V (4.9V Typ.), the voltage VCe
not work if the Pin 1 is not supplied. increases linearly to 2.5V corresponding to a delay
Ce ⋅ 2.5V
td following the low : td = (see figure 2),
The outputs stages have been realized in dar- 10µA
lington configuration with a drop typical of 1.2V. then the reset output goes high again. To avoid
The disable circuit, switches off the output 2 if a glitches in the reset output, the second comparator
voltage lower than 0.8V is applied at pin 3. ”b” has a large hysteresis (1.9V).
TYPICAL APPLICATION
V IN1 1 7 V O1
TDA8137
2 6 V O2
C1 Ce 4 5 3 C2 C3
RESET DISABLE
8137-05.EPS
.
C1 . C3 = 10µF
4/5
TDA8137
PACKAGE MECHANICAL DATA
9 PINS - PLASTIC HEPTAWATT
L
E
L1
M1
A
M
D
C
D1
L2
L5 L3
G1
G2
G
H3
Dia.
PM-HEPTV.EPS
F
F1
L7
H2
L6
Millimeters Inches
Dimensions
Min. Typ. Max. Min. Typ. Max.
A 4.8 0.189
C 1.37 0.054
D 2.4 2.8 0.094 0.110
D1 1.2 1.35 0.047 0.053
E 0.35 0.55 0.014 0.022
F 0.6 08 0.024 0.031
F1 0.9 0.035
G 2.41 2.54 2.67 0.095 0.100 0.105
G1 4.91 5.08 5.21 0.193 0.200 0.205
G2 7.49 7.62 7.8 0.295 0.300 0.307
H2 10.4 0.409
H3 10.05 10.4 0.396 0.409
L 16.97 0.668
L1 14.92 0.587
L2 21.54 0.848
L3 22.62 0.891
L5 2.6 3 0.102 0.118
L6 15.1 15.8 0.594 0.622
L7 6 6.6 0.236 0.260
M 2.8 0.110
HEPTV.TBL
M1 5.08 0.200
Dia. 3.65 3.85 0.144 0.152
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility
for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result
from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics.
Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all
information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life
support devices or systems without express written approval of SGS-THOMSON Microelectronics.
1994 SGS-THOMSON Microelectronics - All Rights Reserved
Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips
I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to
the I2C Standard Specifications as defined by Philips.
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