AS78XXA

1A 3-TERMINAL POSITIVE VOLTAGE REGULATOR

Description Features
The AS78XXA series are three terminal positive voltage regulators  Output Current up to 1A
designed for a wide variety of applications including local, on-card  Fixed Output Voltages of 5V, 6V, 8V, 9V, 12V, 15V and 18V
regulation.  Output Voltage Accuracy of ±4% over the Full Temperature
Range
The AS78XXA are complete with internal current limiting, thermal  Internal Short Circuit Current Limiting
shutdown protection, and safe-area compensation which make them  Internal Thermal Overload Protection
virtually immune from output overload. If adequate heat sinking is
 Output Transistor Safe-area Protection
provided, these regulators can deliver output currents up to 1A.
 Low Load Regulation
 Stable Performance in High Temperature
The AS78XXA are available in TO-252-2 (3), TO-252-2 (4), TO-252-2
(5), TO-220-3, TO-220-3 (2) and TO-220F-3 packages.  TO-220-3, TO-220-3 (2) and TO-220F-3
 Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
 Lead-Free Packages: TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)
 Totally Lead-Free; RoHS Compliant (Notes 4 & 2)
Applications  Available in “Green” Packages: TO-220-3, TO-220-3 (2) and TO-
 High Efficiency Linear Regulator 220F-3
 Post Regulation for Switching Supply  Lead-Free Finish; RoHS Compliant (Notes 1 & 2)
 Microprocessor Power Supply  Halogen and Antimony Free. “Green” Device (Note 3)
 Mother Board  Lead-Free Packages, Available in “Green” Molding Compound:
TO-252-2 (3), TO-252-2 (4), TO-252-2 (5)
 Totally Lead-Free & Fully RoHS Compliant (Notes 4 & 2)
 Halogen and Antimony Free. “Green” Device (Note 3)

Notes: 1. EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. All applicable RoHS exemptions applied.
2. See https://www.diodes.com/quality/lead-free/ for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and
Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total Br + Cl) and
<1000ppm antimony compounds.
4. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant.

Pin Assignments

(Front View) (Front View)

3 OUTPUT 3 OUTPUT
2 GND 2 GND
1 INPUT 1 INPUT

TO-220-3 (Option 1) TO-220-3 (Option 2)

AS78XXA 1 of 27 March 2018

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 AS78XXA

Pin Assignments (Cont.)

(Front View) (Front View)

3 OUTPUT 3 OUTPUT
2 GND 2 GND
1 INPUT 1 INPUT

TO-220-3 (Option 3) TO-220-3 (2)

(Front View)

3 OUTPUT

2 GND

1 INPUT

TO-220F-3

(Top View) (Top View)

3 OUTPUT 3 OUTPUT

2 GND 2 GND

1 INPUT 1 INPUT

TO-252-2 (3) (Option 1) TO-252-2 (3) (Option 2)

(Top View) (Top View)

3 OUTPUT 3 OUTPUT

2 GND 2 GND

1 INPUT 1 INPUT

TO-252-2 (4) TO-252-2 (5)

AS78XXA 2 of 27 March 2018

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 AS78XXA

Typical Applications Circuit

V IN AS78XXA VOUT
1 3
INPUT OUTPUT

GND
0.33F 0.1F
2

Pin Descriptions

Pin Number Pin Name Function

1 INPUT Voltage Input

2 GND Ground

3 OUTPUT Voltage Output

Functional Block Diagram

1
INPUT

R9 D1
Zener
Q9 Q14
R16
Q21

Q24

C1 R20
R21
R1 Q18

R17 R23
R12
3
Q3 Q6 OUTPUT
Q10 R2
2
Q22
R3
Q11
R18
Q7 R7
Q1 Q4 Q16

R4
R14

Q8
R11
R5
R15

R6
Q23
Q13
Q15
Q2 Q5 R19
C2

Q19

Q17 Q20
Q12

R2 R8 R10 R13

2
GND

AS78XXA 3 of 27 March 2018

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Absolute Maximum Ratings (Note 5)

Symbol Parameter Rating Unit

VIN Input Voltage 36 V

TLEAD Lead Temperature (Soldering, 10sec) +260 °C

PD Power Dissipation Internally Limited W

TJ Operating Junction Temperature +150 °C

TSTG Storage Temperature Range -65 to +150 °C

TO-220-3/TO-220-3 (2) 60
TO-252-2 (3)/TO-252-2
JA Thermal Resistance 100 °C/W
(4)/TO-252-2 (5)
TO-220F-3 60

ESD ESD (Human Body Model) 6000 V

ESD ESD (Machine Model) 500 V

Note 5: Stresses greater than those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “Recommended Operating Conditions” is not implied.
Exposure to “Absolute Maximum Ratings” for extended periods may affect device reliability.

Recommended Operating Conditions

Symbol Parameter Min Max Unit

AS7805A — 25

AS7806A — 26

AS7808A — 28

VIN Input Voltage AS7809A — 29 V

AS7812A — 32

AS7815A — 32

AS7818A — 32

TJ Operating Junction Temperature Range -40 +125 °C

AS78XXA 4 of 27 March 2018

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 AS78XXA

Electrical Characteristics

AS7805A (@ VIN = 10V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 4.9 5 5.1

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 7.5V to V
4.8 — 5.2
20V, PD ≤ 15W
VIN = 7.5V to 20V,
VRLINE Line Regulation — 25 50 mV
IOUT = 500mA, TJ = +25°C
VIN = 10V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 20 50 mV
TJ = +25°C
IQ Quiescent Current VIN = 10V, IOUT = 0 — 3.2 6 mA
VIN = 8V to 25V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 8V to 18V, f = 120Hz,
PSRR Ripple Rejection — 70 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 10 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.05 — A

IPK Peak Output Current VIN = 10V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 0.4 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 5 of 27 March 2018

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Electrical Characteristics (Cont.)

AS7806A (@ VIN = 11V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 5.88 6 6.12

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 8.6V to V
5.76 — 6.24
21V, PD ≤ 15W
VIN = 8.6V to 21V,
VRLINE Line Regulation — 25 60 mV
IOUT = 500mA, TJ = +25°C
VIN = 11V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 20 60 mV
TJ = +25°C
IQ Quiescent Current VIN = 11V, IOUT = 0 — 3.2 6 mA
VIN = 8.6V to 21V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 9.5V to 19.5V, f = 120Hz,
PSRR Ripple Rejection — 65 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = 25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 10 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.2 — A

IPK Peak Output Current VIN = 11V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 0.5 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 6 of 27 March 2018

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Electrical Characteristics (Cont.)

AS7808A (@ VIN = 14V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 7.84 8 8.16

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 10.6V to V
7.7 — 8.3
23V, PD ≤ 15W
VIN = 10.6V to 23V,
VRLINE Line Regulation — 25 75 mV
IOUT = 500mA, TJ = +25°C
VIN = 14V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 25 75 mV
TJ = +25°C
IQ Quiescent Current VIN = 14V, IOUT = 0 — 3.2 6 mA
VIN = 10.6V to 23V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 11.5V to 21.5V, f = 120Hz,
PSRR Ripple Rejection — 62 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 10 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.2 — A

IPK Peak Output Current VIN = 14V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 0.64 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 7 of 27 March 2018

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Electrical Characteristics (Cont.)

AS7809A (@ VIN = 15V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 8.82 9 9.18

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 11.5V to V
8.65 — 9.35
23V, PD ≤ 15W
VIN = 11.5V to 23V,
VRLINE Line Regulation — 25 90 mV
IOUT = 500mA, TJ = +25°C
VIN = 14V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 25 100 mV
TJ = +25°C
IQ Quiescent Current VIN = 15V, IOUT = 0 — 3.2 6 mA
VIN = 11.5V to 23V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 11.5V to 21.5V, f = 120Hz,
PSRR Ripple Rejection — 61 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 10 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.2 — A

IPK Peak Output Current VIN = 15V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 0.72 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 8 of 27 March 2018

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 AS78XXA

Electrical Characteristics (Cont.)

AS7812A (@ VIN = 19V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 11.75 12 12.25

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 14.8V to V
11.5 — 12.5
27V, PD ≤ 15W
VIN = 14.8V to 27V,
VRLINE Line Regulation — 25 120 mV
IOUT = 500mA, TJ = +25°C
VIN = 19V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 40 120 mV
TJ = +25°C
IQ Quiescent Current VIN = 19V, IOUT = 0 — 3.4 6 mA
VIN = 14.8V to 30V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 15V to 25V, f = 120Hz,
PSRR Ripple Rejection — 60 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 11 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.2 — A

IPK Peak Output Current VIN = 18V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 0.96 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 9 of 27 March 2018

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Electrical Characteristics (Cont.)

AS7815A (@ VIN = 23V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 14.7 15 15.3

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 17.9V to V
14.4 — 15.6
30V, PD ≤ 15W
VIN = 17.9V to 30V,
VRLINE Line Regulation — 35 150 mV
IOUT = 500mA, TJ = +25°C
VIN = 23V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 70 150 mV
TJ = +25°C
IQ Quiescent Current VIN = 23V, IOUT = 0 — 3.4 6 mA
VIN = 17.9V to 30V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 18.5V to 28.5V, f = 120Hz,
PSRR Ripple Rejection — 58 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 11 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.2 — A

IPK Peak Output Current VIN = 21V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 1.2 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 10 of 27 March 2018

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Electrical Characteristics (Cont.)

AS7818A (@ VIN = 27V, IOUT = 1A, TJ = -40 to +125°C, unless otherwise specified.)

Symbol Parameter Conditions Min Typ Max Unit

TJ = +25°C 17.64 18 18.36

VOUT Output Voltage IOUT = 5mA to 1A, VIN = 21V to V
17.3 — 18.7
33V, PD ≤ 15W
VIN = 21V to 33V,
VRLINE Line Regulation — 45 180 mV
IOUT = 500mA, TJ = +25°C
VIN = 27V, IOUT = 5mA to 1A,
VRLOAD Load Regulation — 85 180 mV
TJ = +25°C
IQ Quiescent Current VIN = 27V, IOUT = 0 — 3.6 6 mA
VIN = 21V to 33V, IOUT = 500mA,
— 0.3 0.8
∆IQ Quiescent Current Change TJ = +25°C mA
IOUT = 5mA to 1A, TJ = +25°C — 0.08 0.5
VIN = 22V to 32V, f = 120Hz,
PSRR Ripple Rejection — 57 — dB
IOUT = 500mA
∆VOUT = 1%, IOUT = 1A,
VDROP Dropout Voltage — 2 — V
TJ = +25°C
NO Output Noise Voltage f = 10Hz to 100kHz, TA = +25°C — 10 — µV/VO

RO Output Resistance f = 1kHz — 11 — mΩ

ISC Short Circuit Current VIN = 35V, TA = +25°C — 0.2 — A

IPK Peak Output Current VIN = 24V, TJ = +25°C — 2.2 — A

∆VOUT/∆T Output Voltage Temperature — — 1.44 — mV/°C

(∆VOUT/VOUT)/∆T Coefficient — — 80 — ppm/°C

TO-220-3/TO-220-3 (2) — 9 —
TO-252-2 (3)/
θJC Thermal Resistance TO-252-2 (4)/ — 16 — °C/W
TO-252-2 (5)
TO-220F-3 — 9 —

AS78XXA 11 of 27 March 2018

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 AS78XXA

Performance Characteristics

Peak Output Current vs. Input/Output Differential Voltage Output Voltage vs. Junction Temperature
5.050
2.5 AS7805A
O
AS7805A TJ=-40 C 5.025
VIN=10V
O
TJ=25 C IOUT=10mA
2.0 O 5.000
TJ=125 C IOUT=1A
Peak Output Current (A)

Output Voltage (V)

4.975

1.5
4.950

4.925
1.0

4.900

0.5
4.875

4.850
0.0 -40 -20 0 20 40 60 80 100 120
3 6 9 12 15 18 21 24
O
VIN-VOUT (V) Junction Temperature ( C)

Output Voltage vs. Output Current Output Voltage vs. Input Voltage
5.050 5.050

5.025
AS7805A 5.025
O
VIN=10V, TJ=25 C
5.000 5.000
Output Voltage (V)
Output Voltage (V)

4.975 4.975

4.950 4.950

4.925 4.925
AS7805A
O
4.900 4.900 IOUT=500mA, TJ=25 C
O
IOUT=500mA, TJ=75 C
O
4.875 4.875 IOUT=1A, TJ=25 C

4.850 4.850
0 200 400 600 800 1000 1200 1400 8 10 12 14 16 18 20 22 24

Output Current (mA) Input Voltage (V)

Quiescent Current vs. Junction Temperature Ripple Rejection vs. Frequency

6 100

5
AS7805A AS7805A
VIN=10V, IOUT=0 80
Quiescent Current (mA)

Ripple Rejection (dB)

4
60

40
2

1 20

0 0
-40 -20 0 20 40 60 80 100 120 10 100 1k 10k 100k 1M
O
Junction Temperature ( C) Frequency (Hz)

AS78XXA 12 of 27 March 2018

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Performance Characteristics (Cont.)

Dropout Voltage vs. Junction Temperature Power Dissipation vs. Junction Temperature

2.5 30

AS7805A
25 Package: TO-220-3
2.0 2
Heatsink: 60*43mm

Power Dissipation (W)

Dropout Voltage (V)

20
1.5

15

1.0
AS7805A 10
IOUT=100mA
0.5 IOUT=500mA
5
IOUT=1A

0.0 0
-40 -20 0 20 40 60 80 100 120 -40 -20 0 20 40 60 80 100 120

O O
Junction Temperature ( C) Junction Temperature ( C)

Line Transient Load Transient

(Conditions: IOUT = 500mA, COUT = 0.1µF) (Conditions: VIN = 10V, CIN = 0.33µF, COUT = 0.1µF)

25 2
∆VOUT (100mV/Div) IIOUT (1A/Div)

20 AS7805A
VIN (5V/Div)

AS7805A 1
15 0

10 -1 0.005A
∆VOUT (50mV/Div)

0 100

-50 0

-100 -100

-150 -200

Time (100µs/Div) Time (40µs/Div)

AS78XXA 13 of 27 March 2018

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Ordering Information

AS78XXA XX XX - XX

Product Name Output Voltage Package Packing E1/G1

05 : 5V T : TO-220-3 TR : Tape & Reel E1 : RoHS Compliant
06 : 6V TO-220-3 (2) Blank : Tube G1 : RoHS Compliant
08 : 8V TF: TO-220F-3 and Green
09 : 9V D: TO-252-2 (3)
12 : 12V TO-252-2 (4)
15 : 15V TO-252-2 (5)
18 : 18V

RoHS
Output
Package Compliant Status
Part Number Voltage Marking ID Packing Quantity Alternative
(Note 7) Lead Free/ (Note 6)
(V)
Green
Pb AS7805ADTR- Tape & AS7805ADTR-
5 Lead Free AS7805AD-E1 2500 NRND
Lead-Free E1 TO-252-2 Reel G1
AS7805ADTR- (3)/(4)/(5) Tape & In
5 Green AS7805AD-G1 2500 —
G1 Reel Production
Pb In
AS7805AT-E1 5 Lead Free AS7805AT-E1 Tube 1000 —
TO-220-3/ Production
(2) In
AS7805AT-G1 5 Green AS7805AT-G1 Tube 1000 —
Green Production
Pb AS7805ATF- AS7805ATF- In
5 Lead Free Tube 1000 —
E1 TO-220F- E1 Production
AS7805ATF- 3 AS7805ATF- AS7805ATF-
5 Green Tube 1000 End of Life
Green G1 G1 E1
Pb AS7806ADTR- Tape & AS7806ADTR-
6 Lead Free AS7806AD-E1 2500 NRND
Lead-Free E1 TO-252-2 Reel G1
AS7806ADTR- (3)/(4)/(5) Tape & In
6 Green AS7806AD-G1 2500 —
G1 Reel Production
In
Pb AS7806AT-E1 6 Lead Free AS7806AT-E1 Tube 1000 —
TO-220-3/ Production
(2)
AS7806AT-G1 6 Green AS7806AT-G1 Tube 1000 End of Life AS7806AT-E1
Green
AS7806ATF- AS7806ATF-
Pb E1 TO-220F-
6 Lead Free
E1 Tube 1000 End of Life None
AS7806ATF- 3 AS7806ATF-
6 Green Tube 1000 End of Life None
Green G1 G1
AS7808ADTR- Tape &
Pb E1 TO-252-2
8 Lead Free AS7808AD-E1
Reel
2500 End of Life None
Lead-Free
AS7808ADTR- (3)/(4)/(5) Tape & In
8 Green AS7808AD-G1 2500 —
G1 Reel Production
In
Pb AS7808AT-E1 8 Lead Free AS7808AT-E1 Tube 1000 —
TO-220-3/ Production
(2)
AS7808AT-G1 8 Green AS7808AT-G1 Tube 1000 End of Life AS7808AT-E1
Green
AS7808ATF- AS7808ATF- In
Pb 8 Lead Free Tube 1000 —
E1 TO-220F- E1 Production
AS7808ATF- 3 AS7808ATF-
8 Green Tube 1000 End of Life None
Green
G1 G1
AS7809ADTR- Tape & AS78L05ZTR-
Pb 9 Lead Free AS7809AD-E1 2500 NRND
E1 TO-252-2 Reel G1
Lead-Free
AS7809ADTR- (3)/(4)/(5) Tape & In
9 Green AS7809AD-G1 2500 —
G1 Reel Production
In
Pb AS7809AT-E1 9 Lead Free AS7809AT-E1 Tube 1000 —
TO-220-3/ Production
(2)
AS7809AT-G1 9 Green AS7809AT-G1 Tube 1000 End of Life AS7809AT-E1
Green
AS7809ATF- AS7809ATF- In
Pb 9 Lead Free Tube 1000 —
E1 TO-220F- E1 Production
AS7809ATF- 3 AS7809ATF- AS7809ATF-
9 Green Tube 1000 End of Life
G1 G1 E1
Green

AS78XXA 14 of 27 March 2018

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 AS78XXA

Ordering Information (Cont.)

RoHS
Output
Package Compliant Status
Part Number Voltage Marking ID Packing Quantity Alternative
(Note 7) Lead Free/ (Note 6)
(V)
Green
Pb AS7812ADTR- Tape & AS7812ADTR-
12 Lead Free AS7812AD-E1 2500 NRND
Lead-Free E1 TO-252-2 Reel G1
AS7812ADTR- (3)/(4)/(5) Tape & In
12 Green AS7812AD-G1 2500 —
G1 Reel Production
In
Pb AS7812AT-E1 12 Lead Free AS7812AT-E1 Tube 1000 —
TO-220-3/ Production
(2)
AS7812AT-G1 12 Green AS7812AT-G1 Tube 1000 End of Life AS7812AT-E1
Green
AS7812ATF- AS7812ATF-
Pb 12 Lead Free Tube 1000 End of Life None
E1 TO-220F- E1
AS7812ATF- 3 AS7812ATF-
12 Green Tube 1000 End of Life None
Green G1 G1
AS7815ADTR- Tape & AS7815ADTR-
Pb E1
15 Lead Free AS7815AD-E1
Reel
2500 End of Life
G1
Lead-Free
TO-252-2
AS7815ADTR- (3)/(4)/(5) Tape & In
15 Green AS7815AD-G1 2500 —
G1 Reel Production
In
Pb AS7815AT-E1 15 Lead Free AS7815AT-E1 Tube 1000 —
TO-220-3/ Production
(2) In
AS7815AT-G1 15 Green AS7815AT-G1 Tube 1000 —
Green Production
AS7815ATF- AS7815ATF- In
Pb 15 Lead Free Tube 1000 —
E1 TO-220F- E1 Production
AS7815ATF- 3 AS7815ATF- AS7815ATF-
15 Green Tube 1000 End of Life
Green G1 G1 E1
AS7818ADTR- Tape & AS7818ADTR-
Pb 18 Lead Free AS7818AD-E1 2500 NRND
Lead-Free
E1 TO-252-2 Reel G1
AS7818ADTR- (3)/(4)/(5) Tape & In
18 Green AS7818AD-G1 2500 —
G1 Reel Production
Pb AS7818AT-E1 18 Lead Free AS7818AT-E1 Tube 1000 End of Life None
TO-220-3/
(2)
AS7818AT-G1 18 Green AS7818AT-G1 Tube 1000 End of Life None
Green
AS7818ATF- AS7818ATF- In
Pb 18 Lead Free Tube 1000 —
E1 TO-220F- E1 Production
AS7818ATF- 3 AS7818ATF- AS7818ATF-
18 Green Tube 1000 End of Life
G1 G1 E1
Green

Notes: 6. NRND: Not Recommended for New Design.

7. For packaging details, go to our website at: https://www.diodes.com/design/support/packaging/diodes-packaging/.

AS78XXA 15 of 27 March 2018

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 AS78XXA

Marking Information

(1) TO-220-3/TO-220-3 (2)

(Front View)

AS78XXA AS78XXA AS78XXA

T-XX T-XX T-XX
AS78XXA YWWAXX
T-XX YWWAXX YWWAXX
YWWAXX

First and Second Lines: Logo and Marking ID

(See Ordering Information)
Third Line: Date Code
Y: Year
WW: Work Week of Molding
A: Assembly House Code
XX: Internal Code

(2) TO-220F-3
(Front View)

First and Second Lines: Logo and Marking ID

(See Ordering Information)
AS78XXA Third Line: Date Code
TF-XX Y: Year
YWWAXX WW: Work Week of Molding
A: Assembly House Code
XX: Internal Code

AS78XXA 16 of 27 March 2018

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 AS78XXA

Marking Information (Cont.)

(3) TO-252-2 (3)/(4)/(5)

(Top View)

AS78XXA
D-XX AS78XXA
YWWAXX D-XX
AS78XXA AS78XXA YWWAXX
D-XX D-XX
YWWAXX YWWAXX

First and Second Lines: Logo and Marking ID

(See Ordering Information)
Third Line: Date Code
Y: Year
WW: Work Week of Molding
A: Assembly House Code
XX: Internal Code

AS78XXA 17 of 27 March 2018

Document number: DS36562 Rev. 5 - 2 www.diodes.com © Diodes Incorporated
 AS78XXA

Package Outline Dimensions (All dimensions in mm(inch).)

(1) Package Type: TO-220-3

9.660(0. 380)
10.660(0. 420) 2.540(0.100)
Option 1 φ3.540(0. 139) 3.420(0.135)
0.510(0. 020)
4.080(0. 161) 1.390(0. 055)

0. 200(0. 008)

14.220(0.560)
16.510(0.650)
7°

8.390(0.330)
φ1.500(0. 059) 9.520(0.375) 3.560(0. 140)
27.880(1.098)
30.280(1.192)
4.820(0. 190)
2.040(0. 080)
2.920(0. 115)
3° 7°

1.150(0. 045)
1.770(0. 070)

0.813(0. 032)

0. 381(0. 015)
0.356 (0.014)
2.540(0. 100) 2.540(0. 100) 0.610 (0.024)

Option 2 Option 3

AS78XXA 18 of 27 March 2018

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 AS78XXA

Package Outline Dimensions (Cont. All dimensions in mm(inch).)

(2) Package Type: TO-220-3 (2)

9.800(0.386)
10.200(0.402)

F 3.560(0.140)
1.620(0.064) 0.600(0.024) 1.200(0.047)
3.640(0.143)
1.820(0.072) REF 1.400(0.055)

6.300(0.248)
6.700(0.264)
1.200(0.047)
11.100(0.437)

1.400(0.055)
REF

3°
9.000(0.354)
9.400(0.370)

4.400(0.173)
4.600(0.181)
2.200(0.087)
2.500(0.098)
3° 3°

3.000(0.118) 1.170(0.046)
REF 1.390(0.055)
12.600(0.496)
13.600(0.535)
10.600(0.417)
9.600(0.378)

0.700(0.028)
0.900(0.035)

0.400(0.016)
2.540(0.100) 2.540(0.100) 0.600(0.024)
REF REF

AS78XXA 19 of 27 March 2018

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 AS78XXA

Package Outline Dimensions (Cont. All dimensions in mm(inch).)

(3) Package Type: TO-220F-3

9.700(0. 382) Option 1

10.300(0. 406)
3. 000(0. 119)
6.900(0. 272) 3. 400(0. 134)
F 3.000(0. 119) 2. 350(0. 093)
3.550(0. 140) 7.100(0. 280) 2. 900(0. 114)

3. 370(0. 133)
3. 900(0. 154)

14. 700(0. 579)

16. 000(0. 630)

4. 300(0. 169)
4. 900(0. 193)
2.790(0.110)
4.500(0.177)

1. 000(0. 039)
1. 400(0. 055) 2.520(0.099)
2.920(0.115)
1. 100(0. 043)
1. 500(0. 059)

12. 500(0. 492)

13. 500(0. 531)

0.500(0. 020)
0.900(0. 035)

0. 450(0. 018)
0. 650(0. 026)
2.540(0.100) 2. 540(0. 100)

Option 2

3. 190(0. 126)
3. 250(0. 128)
5 5

AS78XXA 20 of 27 March 2018

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 AS78XXA

Package Outline Dimensions (Cont. All dimensions in mm(inch).)

(4) Package Type: TO-252-2 (3)

0.900(0.035)
1.250(0.049)

6.500(0. 256)
6.700(0. 264)
4.700REF
5.130(0.202) 1.29±0.1
5.460(0.215) 0.470(0.019)
0.600(0.024)
Option 1

5.250REF
6.000(0.236)
6.200(0.244)

5
0.150(0.006)
0.750(0.030)

0.600(0.024)
1.000(0.039)
9

9.800(0.386)
10.400(0.409)
1.800REF

0.900(0.035)
1.100(0.043)
0
8

2.900REF
3
7

0.720(0.028) 0.720(0.028) 0

1.400(0.055)
1.700(0.067)
0.900(0. 035) 0.850(0.033) 8
2.286(0. 090)
BSC
5
9

2.200(0.087) Option 2
2.380(0.094)

AS78XXA 21 of 27 March 2018

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 AS78XXA

Package Outline Dimensions (Cont. All dimensions in mm(inch).)

(5) Package Type: TO-252-2 (4)

2.180(0.086)
6.350(0.250)
2.380(0.094)
6.730(0.265) 4.320(0.170)
0.890(0.035) MIN
4.960(0.195) 0.460(0.018) 2.160(0.085)
1.270(0.050)
5.460(0.215) 0.600(0.024) MIN

0
1.20±0.05 15
5.210(0.205)
MIN
5.970(0.235)
6.220(0.245) 9.940(0.391)
10.340(0.407)
1.700(0.067)
1.900(0.075)
1.145(0.045)
1.492(0.059)

0.765(0.030) 1.010(0.040)
1.124(0.044)
0.640(0.025) MAX DETAIL “A”

2.290(0.090) 0.884(0.035)
BSC
0.650(0.026)
PLATING
0.780(0.031)
3 3
0.460(0.018) 0.410(0.016)
0.610(0.024) 0.560(0.022)

BASE METAL

0.640(0.025)
0.884(0.035)

SECTION B-B

GAUGE PLANE B

0 SEATING
10 PLANE
B
1.500(0.059) 0.020(0.001)
1.780(0.070) 0.120(0.005)
2.740(0.108)
REF

AS78XXA 22 of 27 March 2018

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 AS78XXA

Package Outline Dimensions (Cont. All dimensions in mm(inch).)

(6) Package Type: TO-252-2 (5)

6.450(0.254) 2.190(0.086)
6.700(0.264) 2.390(0.094)

0.880(0.035) 5.210(0.205) 0.450(0.018)

1.270(0.050) 5.500(0.217) 0.580(0.023)
6°
8°

6.000(0.236)
6.200(0.244)

10.400(0.409)
9.400(0.370)
0.000(0.000)
0.130(0.005)
0.640(0.025)
1.020(0.040)

0.760(0.030)
1.140(0.045)
2.740(0.108)REF

1.780(0.070)
1.400(0.055)
2.286(0.090) 0.640(0.025)
0°
0.880(0.035) 0.508(0.020) 10°
5.210(0.205)
MIN

4.320(0.170)
MIN

AS78XXA 23 of 27 March 2018

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 AS78XXA

Suggested Pad Layout

(1) Package Type: TO-252-2 (3)

X2

Y2

Y1

X1 E1

Z X1 X2 = Y2 Y1 G E1
Dimensions
(mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch)
Value 11.600/0.457 1.500/0.059 7.000/0.276 2.500/0.098 2.100/0.083 2.300/0.091

AS78XXA 24 of 27 March 2018

Document number: DS36562 Rev. 5 - 2 www.diodes.com © Diodes Incorporated
 AS78XXA

Suggested Pad Layout (Cont.)

(2) Package Type: TO-252-2 (4)

X2

Y2

Y1

X1 E1

Z X1 X2 = Y2 Y1 G E1
Dimensions
(mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch)
Value 11.600/0.457 1.500/0.059 7.000/0.276 2.500/0.098 2.100/0.083 2.300/0.091

AS78XXA 25 of 27 March 2018

Document number: DS36562 Rev. 5 - 2 www.diodes.com © Diodes Incorporated
 AS78XXA

Suggested Pad Layout (Cont.)

(3) Package Type: TO-252-2 (5)

X2

Y2

Y1

X1 E1

Z X1 X2 = Y2 Y1 G E1
Dimensions
(mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch) (mm)/(inch)
Value 11.600/0.457 1.500/0.059 7.000/0.276 2.500/0.098 2.100/0.083 2.300/0.091

AS78XXA 26 of 27 March 2018

Document number: DS36562 Rev. 5 - 2 www.diodes.com © Diodes Incorporated
 AS78XXA

IMPORTANT NOTICE

DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).

Diodes Incorporated and its subsidiaries reserve the right to make modifications, enhancements, improvements, corrections or other changes
without further notice to this document and any product described herein. Diodes Incorporated does not assume any liability arising out of the
application or use of this document or any product described herein; neither does Diodes Incorporated convey any license under its patent or
trademark rights, nor the rights of others. Any Customer or user of this document or products described herein in such applications shall assume
all risks of such use and will agree to hold Diodes Incorporated and all the companies whose products are represented on Diodes Incorporated
website, harmless against all damages.

Diodes Incorporated does not warrant or accept any liability whatsoever in respect of any products purchased through unauthorized sales channel.
Should Customers purchase or use Diodes Incorporated products for any unintended or unauthorized application, Customers shall indemnify and
hold Diodes Incorporated and its representatives harmless against all claims, damages, expenses, and attorney fees arising out of, directly or
indirectly, any claim of personal injury or death associated with such unintended or unauthorized application.

Products described herein may be covered by one or more United States, international or foreign patents pending. Product names and markings
noted herein may also be covered by one or more United States, international or foreign trademarks.

This document is written in English but may be translated into multiple languages for reference. Only the English version of this document is the
final and determinative format released by Diodes Incorporated.

LIFE SUPPORT

Diodes Incorporated products are specifically not authorized for use as critical components in life support devices or systems without the express
written approval of the Chief Executive Officer of Diodes Incorporated. As used herein:

A. Life support devices or systems are devices or systems which:

1. are intended to implant into the body, or

2. support or sustain life and whose failure to perform when properly used in accordance with instructions for use provided in the
labeling can be reasonably expected to result in significant injury to the user.

B. A critical component is any component in a life support device or system whose failure to perform can be reasonably expected to cause the
failure of the life support device or to affect its safety or effectiveness.

Customers represent that they have all necessary expertise in the safety and regulatory ramifications of their life support devices or systems, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products and any
use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.

Copyright © 2018, Diodes Incorporated

www.diodes.com

AS78XXA 27 of 27 March 2018

Document number: DS36562 Rev. 5 - 2 www.diodes.com © Diodes Incorporated