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.

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% (T_j = −40°C to +150°C)
Dropout voltage: 120 mV typ. (5.0 V output product, I_OUT = 100 mA)
Output current: Possible to output 400 mA (V_IN = V_OUT(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 (T_j = −40°C to +150°C)
Hysteresis width: 0.12 V min.
Release delay time is adjustable^*2: 18 ms typ. (C_DLY = 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. (C_DLY = 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. (I_OUT = 0 mA, When the watchdog timer is deactivated.); 75 μA typ. (I_OUT ≤ 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 C_DLY to the DLY pin.
*3. Contact our sales representatives for details.

Applications

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

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.