Automotive ICs

Automotive, 125°C Operation, 36 V Input, 250 mA, Built-in Window Watchdog Timer, Voltage Regulator with Reset Function S-19514/19515 Series

Related Products
WDT (Window mode) S-19514/5S-19518 (Built-in Regulator ON / OFF circuit)
WDT (Time-out mode) S-19504/5

The Industry's Lowest current consumption Automotive Watchdog Timer S-19514/5, S-19518

The S-19514/19515 Series, developed by using high-withstand voltage CMOS technology, is a low dropout positive voltage regulator with the window 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.

Thermal simulation service
ABLIC Inc. offers a “thermal simulation service” which supports the thermal design in conditions when our power management ICs are in use by customers. Our thermal simulation service will contribute to reducing the risk in the thermal design at customers development stage.
For more information regarding our thermal simulation service, contact our sales representatives.

FIT rate calculation
ABLIC Inc. offers FIT rate calculated based on actual customer usage conditions in order to support customer functional safety design.
For more information regarding our FIT rate calculation, contact our sales representatives.

Caution: This product can be used in vehicle equipment and in-vehicle equipment. Before using the product for these purposes, it is imperative to contact our sales representatives.


Regulator block

Output voltage
3.3 V, 5.0 V
Input voltage
3.0 V to 36.0 V
Output voltage accuracy
±2.0% (Tj = −40°C to +150°C)
Dropout voltage
100 mV typ. (5.0V output product, Iout = 100mA)
Output current
Possible to output 250 mA (Vin = Vout(s) + 1.0 V)*1
Input and output capacitors
A ceramic capacitor of 1.0 µF or more can be used.
Built-in overcurrent protection circuit
Limits overcurrent of output transistor.
Built-in thermal shutdown circuit
Detection temperature 170°C typ.

Detector block

Detection voltage
2.6 V to 4.7 V, selectable in 0.1 V step
Detection voltage accuracy
±2.0% (Tj = −40°C to +150°C)
Hysteresis width
0.12 V min.
Release delay time is adjustable*2
20 ms typ. (Cdly= 10 nF)

Watchdog timer block

Watchdog activation current is adjustable
1.5 mA typ. (WADJ pin is open)
Watchdog trigger time is adjustable*2
46 ms typ. (Cdly= 10 nF)
Product type is selectable
S-19514 Series (Product with WEN pin (Output: WO / RO pin))
S-19515 Series (Product without WEN pin (Output: WO pin and RO pin))
Autonomous watchdog operation function
Watchdog timer operates due to detection of load current.
Watchdog mode
Window mode


Current consumption
3.0 μA typ. (During watchdog timer deactivation)
5.0 μA typ. (During watchdog timer activation)
Operation temperature range
Ta = −40°C to +125°C
Lead-free (Sn 100%), halogen-free
Withstand 45 V load dump
AEC-Q100 qualified*3

*1. Please make sure that the loss of the IC will not exceed the power dissipation when the output current is large.
*2. The release delay time and the watchdog trigger time can be adjusted by connecting Cdly to the DLY pin. 
*3. Contact our sales representatives for details.


  • Constant-voltage power supply for automotive electric component, monitoring of microcontroller

Parts List

  • U(Ux), S and G at the end of the product name of ABLIC Inc. were used to indicate different material specifications as “environmental code”,
    however, these have now been unified into “lead-free and halogen-free” and are identical in terms of environmental quality.
  • Note: Lead-free plating other than 100% Sn is applied to some limited old products, therefore, please contact our sales representatives for details.
  • These descriptions may be different from the actual product name and parameter.
    Please confirm the product name and specifications with the data sheet again.
  • The information herein is subject to change without notice.