Document
AS78LXX
100mA POSITIVE VOLTAGE REGULATOR
Description
The AS78LXX series are three terminal positive regulators designed for a wide variety of applications including local, on-card regulation.
This series of regulators are complete with internal current limiting, thermal shutdown protection, and safe-area compensation which make them virtually immune from output overload. If adequate heat sinking are provided, these regulators can deliver output currents up to 100mA.
The AS78LXX series are available in TO-92 (Bulk Packing)/ TO-92 (Ammo Packing), SOT-89 and SOIC-8 packages.
Features
Output Current up to 100mA Fixed Output Voltages of 5V, 12V and 15V Output Voltage Accuracy of ±5% over the Full Temperature
Range Internal Short Circuit Current Limiting Internal Thermal Overload Protection No External Components Output Transistor Safe-Area Protection Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) For automotive applications requiring specific change control
(i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
Applications
Consumer electronics Microprocessor power supplies Mother boards
Pin Assignments
Z Package (TO-92 (Bulk Packing))
3 IN P U T
2 GND 1 O U TPU T
Z Package (TO-92 (Ammo Packing))
3 IN P U T
2 GND 1 O U TPU T
R Package (SOT-89 Option 1)
3 IN P U T
GND
2 GND
1 O U TPU T
R Package (SOT-89 Option 2)
3 IN P U T
GND
2 GND
1 O U TPU T
M Package (SOIC-8)
O U TPU T 1 GND 2 GND 3 NC 4
8 IN P U T 7 GND 6 GND 5 NC
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS), 2011/65/EU (RoHS 2) & 2015/863/EU (RoHS 3) compliant. 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.
AS78LXX
Document number: DS36515 Rev. 5 - 2
1 of 15 www.diodes.com
October 2023
© 2023 Copyright Diodes Incorporated. All Rights Reserved.
Typical Applications Circuit
VIN
3 (8)
AS78LXX
1 (1)
INPUT OUTPUT
GND
0.33F
2 (2, 3, 6, 7)
VOUT
0.1F
AS78LXX
A (B) A for 3-pin B for 8-pin
Functional Block Diagram
R1 Q1 Q2
Q3
Q6
R3
Q4 R4
R5
Q5
R2
R9
Q9
Q14
C1 Q18
R12
D1 Zener R16 Q21
R20
R17
Q10
Q11
Q7
R7
Q16
Q8 R6
R11 Q13
Q15
R14 R15 C2
Q22 R18
Q23 R19
Q19
Q12
Q17
Q20
R8
R10
R13
3 (8) INPUT
Q24 R21
R23
R2 2
1 (1) OUTPUT
2 (2, 3, 6, 7)
GND
A (B) A for 3-pin B for 8-pin
AS78LXX
Document number: DS36515 Rev. 5 - 2
2 of 15 www.diodes.com
October 2023
© 2023 Copyright Diodes Incorporated. All Rights Reserved.
AS78LXX
Absolute Maximum Ratings (Note 4)
Symbol VIN TJ
TLEAD PD TST.