Automotive ICs

Automotive, 125°C Operation, 36 V Input, 400 mA, Built-in Watchdog Timer Voltage Regulator with Reset Function S-19502/19503 Series

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.

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.

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.

 

Features

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. (5.0 V output product, IOUT = 100 mA)
Output current
Possible to output 400 mA (VIN = VOUT(S) + 1.0 V)*1
Input and output capacitors
A ceramic capacitor of 2.2 μF 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-19502 Series (Product with WEN pin (Output: WO / RO pin))
S-19503 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

 

Overall

Current consumption
60 μA typ. (IOUT = 0 mA, When the watchdog timer is deactivated.)
75 μA typ. (IOUT ≤ 5 mA, When the watchdog timer is activated.)
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.

Applications

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