Automotive ICs

Automotive, 125°C Operation, 36 V Input, 200 mA, Built-in Watchdog Timer, Voltage Regulator with Reset Function S-19500/19501 Series

The S-19500/19501 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.

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
3.0 V to 5.3 V, selectable in 0.1 V step
Input voltage
4.0 V to 36.0 V
Output voltage accuracy
±2.0% (Tj = −40°C to +150°C)
Dropout voltage
120 mV typ. (5.0V output product, Iout = 100mA)
Output current
Possible to output 200 mA (Vin = Vout(s) + 1.0 V)*1
Input and output capacitors
A ceramic capacitor of 2.2µF or more can be used.
Ripple rejection
70 dB typ. (f = 100 Hz)
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 5.0 V, selectable in 0.1 V step
Detection voltage accuracy
±100 mV (Tj = −40°C to +150°C)
Hysteresis width
0.12 V min.
Release delay time is adjustable*2
18 ms typ. (Cdly= 47 nF)

Watchdog timer block

Watchdog activation current is adjustable
1.5 mA typ. (WADJ pin is open)
Watchdog trigger time is adjustable*2
43 ms typ. (Cdly= 47 nF)
Product type is selectable
S-19500 Series (Product with WEN pin (Output: WO / RO pin))
S-19501 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
Time-out mode


Current consumption
60 μA typ. (Iout = 0 mA, During the watchdog timer deactivation)
75 μA typ. (Iout ≤ 5 mA, During the 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.


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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.