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S-19502/19503 Series
www.ablicinc.com
© ABLIC Inc., 2017
AUTOMOTIVE, 125°C OPERATION,
36 V INPUT, 400 mA, BUILT-IN WATCHDOG TIMER CIRCUIT
VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.0_01
The S-19502/19503 Series, developed by using high-withstand voltage CMOS technology, is a low dropout positive
voltage regulator with the watchdog timer and the reset function, which has high-withstand voltage. The monitoring time of
watchdog timer can be adjusted by an external capacitor. Moreover, a voltage detection circuit which monitors the output
voltage is also prepared.
Caution This product can be used in vehicle equipment and in-vehicle equipment. Before using the product in
the purpose, contact to ABLIC Inc. is indispensable.
Features
Regulator block
Output voltage:
Input voltage:
Output voltage accuracy:
Dropout voltage:
Output current:
Input and output capacitors:
Ripple rejection:
Built-in overcurrent protection circuit:
Built-in thermal shutdown circuit:
3.0 V to 5.3 V, selectable in 0.1 V step
4.0 V to 36.0 V
2.0% (Tj = 40°C to 150°C)
120 mV typ. (5.0 V output product, IOUT = 100 mA)
Possible to output 400 mA (VIN = VOUT(S) 1.0 V)*1
A ceramic capacitor of 2.2 F or more can be used.
70 dB typ. (f = 100 Hz)
Limits overcurrent of output transistor.
Detection temperature 170°C typ.
Detector block
Detection voltage:
Detection voltage accuracy:
Hysteresis width:
Release delay time:
Output form:
2.6 V to 5.0 V, selectable in 0.1 V step
100 mV (Tj = 40°C to 150°C)
0.12 V min.
18 ms typ. (CDLY = 47 nF)
Nch open-drain output (Built-in pull-up resistor)
Watchdog timer block
Autonomous watchdog operation function:
Watchdog activation current is adjustable:
Product type is selectable:
Watchdog trigger time is adjustable:
Output form:
The watchdog timer operates due to detection of load current.
1.5 mA typ. (WADJ pin is open)
S-19502 Series
(Product with watchdog enable function)
S-19503 Series
(Product without watchdog enable function)
43 ms typ. (CDLY = 47 nF)
Nch open-drain output (Built-in pull-up resistor)
Overall
Current consumption:
Operation temperature range:
Lead-free (Sn 100%), halogen-free
Withstand 45 V load dump
AEC-Q100 qualified*2
60 A typ. (IOUT = 0 mA, When the watchdog timer is deactivated.)
75 A typ. (IOUT 5 mA, When the watchdog timer is activated.)
Ta = 40°C to 125°C
HSOP-8A package product
*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.
*2. TO-252-9S package product is in the process of AEC-Q100.
Contact our sales office for details.
Applications
Constant-voltage power supply for automotive electric component, monitoring of microcotroller
Packages
TO-252-9S
HSOP-8A
1

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AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 400 mA, BUILT-IN WATCHDOG TIMER CIRCUIT VOLTAGE REGULATOR WITH RESET FUNCTION
S-19502/19503 Series
Rev.1.0_01
Block Diagrams
1. S-19502 Series (Product with watchdog enable function)
VIN
Thermal Overcurrent protection circuit
shutdown
circuit
Reference
voltage
circuit
VOUT
WI
WEN
WADJ
VSS
Reference
voltage
circuit
WDT
circuit
Voltage
detection
circuit
Figure 1
2. S-19503 Series (Product without watchdog enable function)
VIN
WI
WADJ
VSS
Thermal Overcurrent protection circuit
shutdown
circuit
Reference
voltage
circuit
Reference
voltage
circuit
WDT
circuit
Voltage
detection
circuit
Figure 2
DLY
WO / RO
VOUT
DLY
WO
RO
2

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AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 400 mA, BUILT-IN WATCHDOG TIMER CIRCUIT VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.0_01
S-19502/19503 Series
AEC-Q100 Qualified*1
This IC supports AEC-Q100 for the operation temperature grade 1.
Contact our sales office for details of AEC-Q100 reliability specification.
*1. TO-252-9S package product is in the process of AEC-Q100.
Contact our sales office for details.
Product Name Structure
Users can select the product type, output voltage and detection voltage for the S-19502/19503 Series. Refer to
"1. Product name" regarding the contents of product name, "3. Packages" regarding the package drawings and
"4. Product name list" for details of product names.
1. Product name
S-1950 x A x x A - xxxx U 4
Environmental code
U: Lead-free (Sn 100%), halogen-free
Package abbreviation and IC packing specifications*1
V9T1: TO-252-9S, Tape
E8T1: HSOP-8A, Tape
Operation temperature
A: Ta = 40C to 125C
Detection voltage*2
F to Z, 0 to 5
Output voltage*2
C to Z, 0, 1
Product type 1
A: WEN pin positive logic type
Product type 2
2: S-19502 Series (Product with watchdog enable function)
3: S-19503 Series (Product without watchdog enable function)
*1. Refer to the tape drawing.
*2. Refer to "2. Product option list".
2. Product option list
2. 1 Output voltage
Set Output
Voltage
Symbol
5.3 V
C
5.2 V
D
5.1 V
E
5.0 V
F
4.9 V
G
4.8 V
H
4.7 V
J
4.6 V
K
4.5 V
L
4.4 V
M
4.3 V
N
4.2 V
P
Set Output
Voltage
4.1 V
4.0 V
3.9 V
3.8 V
3.7 V
3.6 V
3.5 V
3.4 V
3.3 V
3.2 V
3.1 V
3.0 V
Symbol
Q
R
S
T
U
V
W
X
Y
Z
0
1
2. 2 Detection voltage
Set Detection
Voltage
Symbol
5.0 V
F
4.9 V
G
4.8 V
H
4.7 V
J
4.6 V
K
4.5 V
L
4.4 V
M
4.3 V
N
4.2 V
P
4.1 V
Q
4.0 V
R
3.9 V
S
3.8 V
T
Remark Set output voltage Set detection voltage0.3 V
Set Detection
Voltage
3.7 V
3.6 V
3.5 V
3.4 V
3.3 V
3.2 V
3.1 V
3.0 V
2.9 V
2.8 V
2.7 V
2.6 V
Symbol
U
V
W
X
Y
Z
0
1
2
3
4
5
3

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AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 400 mA, BUILT-IN WATCHDOG TIMER CIRCUIT VOLTAGE REGULATOR WITH RESET FUNCTION
S-19502/19503 Series
Rev.1.0_01
3. Packages
Package Name
TO-252-9S
HSOP-8A
Table 1
Dimension
VA009-A-P-SD
FH008-A-P-SD
Package Drawing Codes
Tape
Reel
VA009-A-C-SD
FH008-A-C-SD
VA009-A-R-SD
FH008-A-R-SD
Land
VA009-A-L-SD
FH008-A-L-SD
4. Product name list
4. 1 S-19502 Series (Product with watchdog enable function)
Table 2
Output Voltage
Detection Voltage
TO-252-9S
HSOP-8A
3.3 V 2.0%
3.3 V 2.0%
2.8 V 0.1 V
2.9 V 0.1 V
S-19502AY3A-V9T1U4
S-19502AY2A-V9T1U4
S-19502AY2A-E8T1U4
5.0 V 2.0%
4.6 V 0.1 V
S-19502AFKA-V9T1U4
S-19502AFKA-E8T1U4
5.0 V 2.0%
4.7 V 0.1 V
S-19502AFJA-V9T1U4
Remark Please contact our sales office for products with specifications other than the above.
4. 2 S-19503 Series (Product without watchdog enable function)
Table 3
Output Voltage
Detection Voltage
TO-252-9S
HSOP-8A
3.3 V 2.0%
3.3 V 2.0%
5.0 V 2.0%
2.8 V 0.1 V
2.9 V 0.1 V
4.6 V 0.1 V
S-19503AY3A-V9T1U4
S-19503AY2A-V9T1U4
S-19503AFKA-V9T1U4
S-19503AY2A-E8T1U4
S-19503AFKA-E8T1U4
5.0 V 2.0%
4.7 V 0.1 V
S-19503AFJA-V9T1U4
Remark Please contact our sales office for products with specifications other than the above.
4

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AUTOMOTIVE, 125°C OPERATION, 36 V INPUT, 400 mA, BUILT-IN WATCHDOG TIMER CIRCUIT VOLTAGE REGULATOR WITH RESET FUNCTION
Rev.1.0_01
S-19502/19503 Series
Pin Configurations
1. TO-252-9S
Top view
5
1234 6789
Figure 3
Table 4 S-19502 Series (Product with Watchdog Enable Function)
Pin No.
Symbol
Description
1
VOUT
Voltage output pin (Regulator block)
Connection pin for watchdog
2
WADJ
activation threshold current adjustment
resistor
3
DLY
Connection pin for delay time
adjustment capacitor
4
NC*1
No connection
5
VSS
GND pin
6
WO / RO*2
WO
RO
Watchdog output pin
Reset output pin
7
WEN
Watchdog enable pin
8 WI
Watchdog input pin
9 VIN Voltage input pin (Regulator block)
Table 5 S-19503 Series (Product without Watchdog Enable Function)
Pin No.
Symbol
Description
1
VOUT
Voltage output pin (Regulator block)
Connection pin for watchdog
2
WADJ
activation threshold current adjustment
resistor
3
DLY
Connection pin for delay time
adjustment capacitor
4
NC*1
No connection
5
VSS
GND pin
6 RO Reset output pin
7 WO Watchdog output pin
8 WI
Watchdog input pin
9 VIN Voltage input pin (Regulator block)
*1. The NC pin is electrically open.
The NC pin can be connected to the VIN pin or the VSS pin.
*2. The WO / RO pin combines the watchdog output pin and the reset output pin.
5