This IC is a secondary step-down switching regulator developed using CMOS process technologies with a built-in Power Good function.
PWM control (S-19954 Series) or PWM / PFM switching control (S-19955 Series) can be selected as an option.
S-19954 Series, which features PWM control, can be used without interfering with AM radio bands.
Since the S-19955 Series, which features PWM / PFM switching control, operates with PWM control under heavy load and automatically switches to PFM control under light load. It achieves high-efficiency operation in accordance with the device's status.
This IC is implemented as a small package and can comprise an application circuit with a coil and two capacitors at the minimum configuration. Since the switching frequency is as high as 2.25 MHz, and the peripheral parts can be made compact, the IC is suitable for space-saving uses.
Features
- Input voltage
- 2.7 V to 5.5 V
- Output voltage
- 0.8 V to 3.3 V
- Output current
- 1 A
- VOUT pin detection voltage accuracy
- ±1.5% (Tj = −40°C to +125°C)
- Efficiency
- 95%
- Oscillation frequency
- 2.25 MHz typ.
- Overcurrent protection function
- 1.75 A typ. (pulse-by-pulse method)
- Thermal shutdown function
- 170°C typ. (detection temperature)
- Short-circuit protection function
- Hiccup control, Latch control
- 100% duty cycle operation
- Output discharge function
- "Available " / "Unavailable " is selectable.
- Power Good function
- Nch open-drain output
- Soft-start function
- 0.35 ms typ.
- Under voltage lockout function (UVLO)
- 2.43 V typ. (detection voltage)
- Input and output capacitors
- Ceramic capacitor compatible
- Operation temperature range
- Ta = −40°C to +125°C
- Lead-free (Sn 100%), halogen-free
- AEC-Q100 in process*1
Remark: HTMSOP-8 package：Under development
*1. Contact our sales representatives for details.
Applications
- Secondary power supply for automotive equipment
- Camera module
- For automotive use (engine, transmission, suspension, ABS, related-devices for EV / HEV / PHEV, etc.)
- Constant-voltage power supply for electrical application for vehicle interior