MIC2177-3.3BWM

MIC2177-3.3BWM DC/DC降压转换电源IC 3.3V SOICW-20L marking/标记 MIC2177-3.3BWM 2.5A同步降压型稳压器

General Description

The MIC2177 is a 200kHz synchronous buck step down switching regulator designed for high-efficiency, battery-powered applications.

The MIC2177 operates from a 4.5V to 16.5V input and features internal power MOSFETs that can supply up to 2.5A output current. It can operate with a maximum duty cycle of 100% for use in low-dropout conditions. It also features a shutdown mode that reduces quiescent current to less than 5µA.

Features

• 4.5V to 16.5V input voltage range

• Dual-mode operation for high efficiency up to 96%

–  PWM mode for > 200mA load current

–  Skip mode for < 200mA load current

•100mΩinternal power MOSFETs at 12V input

• 200kHz preset switching frequency

• Low quiescent current

–  1.0mA in PWM mode

–  500µA in skip mode

–  < 5µA in shutdown mode

• 100% duty cycle for low dropout operation

•Current-mode control

–  Simplified loop compensation

–  Superior line regulation

•Current limit

•Thermal shutdown

•Undervoltage lockout

Applications

•High-efficiency, battery-powered supplies

• Buck step-down dc-to-dc converters

•Cellular telephones

•Laptop computers

•Hand-held instruments

•Battery Charger