SIC471_V01中文资料威世科技数据手册PDF规格书

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

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.