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.

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.


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 office for details.


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