The synchronous step-down switching regulator series offers a small package size, options for PWM and PWM/PFM control, efficiency, and various applications.
ABLIC has launched synchronous step-down switching regulator S-19954/19955 Series, which the company claims to be the industry’s smallest package switching regulator. The integrated circuit (IC) is a secondary step-down switching regulator developed using CMOS process technologies and featuring a built-in Power Good function. It offers two series options: the S-19954 Series with PWM control and the S-19955 Series with PWM/PFM switching control. The S-19954 Series is designed to avoid interference with AM radio bands, making it suitable for applications where radio frequency interference is a concern.
The S-19955 Series operates with PWM control under heavy load and automatically switches to PFM control under light load, ensuring high-efficiency operation based on the device’s status. This IC is available in a small package, allowing for a minimal configuration with just a coil and two capacitors. Its high switching frequency of 2.25 MHz enables compact peripheral components, making it ideal for space-saving applications.
Some of the key features of the switching regulator series include:
- 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)
- Under voltage lockout function (UVLO): 2.43 V typ. (detection voltage)
- Operation temperature range: −40°C to +125°C
The IC is suitable for a variety of applications, including secondary power supply for automotive equipment, camera modules, and various automotive systems such as engines, transmissions, suspensions, ABS, and related devices for electric vehicles (EV), hybrid electric vehicles (HEV), and plug-in hybrid electric vehicles (PHEV). It can also be used as a constant-voltage power supply for electrical applications within vehicle interiors.
For more information, click here.
