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DESCRIPTION

The SiC47x is a family of wide input voltage, high efficiency synchronous buck regulators with integrated high side and low side power MOSFETs. Its power stage is capable of supplying high continuous current at up to 2 MHz switching frequency. This regulator produces an adjustable output voltage down to 0.8 V from 4.5 V to 55 V input rail to accommodate a variety of applications, including computing, consumer electronics, telecom, and industrial.

SiC47x’s architecture allows for ultrafast transient response with minimum output capacitance and tight ripple regulation at very light load. The device enables loop stability regardless of the type of output capacitor used, including low ESR ceramic capacitors. The device also incorporates a power saving scheme that significantly increases light load efficiency. The regulator integrates a full protection feature set, including over current protection (OCP), output overvoltage protection (OVP), short circuit protection (SCP), output undervoltage protection (UVP) and over temperature protection (OTP). It also has UVLO for input rail and a user programmable soft start.

The SiC47x family is available in 3 A, 5 A, 8 A, 12 A pin compatible 5 mm by 5 mm lead (Pb)-free power enhanced MLP55-27L package.

FEATURES

? Versatile

- Single supply operation from 4.5 V to 55 V input voltage

- Adjustable output voltage down to 0.8 V

- Scalable solution 3 A (SiC474), 5 A (SiC473), 8 A (SiC472), 12 A (SiC471)

- Output voltage tracking and sequencing with pre-bias start up

- ± 1 % output voltage accuracy at -40 °C to +125 °C

? Highly efficient

- 98 % peak efficiency

- 4 μA supply current at shutdown

- 235 μA operating current, not switching

? Highly configurable

- Adjustable switching frequency from 100 kHz to 2 MHz

- Adjustable soft start and adjustable current limit

- 3 modes of operation, forced continuous conduction, power save or ultrasonic

? Robust and reliable

- Output over voltage protection

- Output under voltage / short circuit protection with auto retry

- Power good flag and over temperature protection

- Supported by Vishay PowerCAD online design simulation

? Material categorization: for definitions of compliance please see www.vishay.com/doc?99912

APPLICATIONS

? Industrial and automation

? Home automation

? Industrial and server computing

? Networking, telecom, and base station power supplies

? Unregulated wall transformer

? Robotics

? High end hobby electronics: remote control cars, planes, and drones

? Battery management systems

? Power tools

? Vending, ATM, and slot machines