General Description

The SY21282 high efficiency synchronous step-up

regulator operates using adaptive constant off-time

and current mode control, and supports a wide

input voltage range from 3V to 9V. It integrates

switches with low RDS(ON) to minimize conduction

loss.

The SY21282 features cycle-by-cycle peak current

limit, output short-circuit protection, and true

shutdown. It also provides enable control and

power-good indicator for system power sequencing.

The 1MHz pseudo-constant frequency reduces the

output voltage ripple and permits smaller external

capacitors and inductor.

The SY21282 is available in a compact QFN3×3-

16 package

特性 Features

● 3V to 9V Input Voltage Range

● 6A (Min.) Main MOSFET Current Limit

● 7 μA Shutdown Current (Max.)

● 600 μA Quiescent Current (Typ.)

● Programmable Output Current Limit

● Low RDS(ON) for Internal N-Channel

MOSFET: 80mΩ Main, 40mΩ Rectifier,

40mΩ Disconnection

● Synchronous Rectification for High

Efficiency

● Pseudoconstant 1MHz Frequency

● Enable Control

● Input Voltage UVLO

● Output Overvoltage Protection

● Overtemperature Protection

● Output Short-Circuit Protection

● Power-Good Indicator

● True Shutdown Function

● RoHS-Compliant and Halogen-Free

● Compact QFN3mm×3mm-16 Package

Applications

● Power Bank

● High Power Application

● SSD