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General Description

The MIC23153 is a high-efficiency 4 MHz 2A

synchronous buck regulator with HyperLight Load?

mode, Power Good (PG) output indicator, and

programmable soft-start. HyperLight Load? provides

very high efficiency at light loads and ultra-fast

transient response that makes the MIC23153 perfectly

suited for supplying processor core voltages.

An additional benefit of this proprietary architecture is

very low output ripple voltage throughout the entire

load range with the use of small output capacitors. The

tiny 2.5 mm x 2.5 mm thin DFN package saves

precious board space and requires only four external

components.

The MIC23153 is designed for use with a very small

inductor, down to 0.47 μH, and an output capacitor as

small as 2.2 μF that enables a total solution size, less

than 1 mm in height.

The MIC23153 has a very-low quiescent current of

22 μA and achieves a peak efficiency of 93 in

continuous conduction mode. In discontinuous

conduction mode, the MIC23153 can achieve 85

efficiency at 1 mA.

The MIC23153 is available in 10-pin 2.5 mm x 2.5 mm

TDFN package with an operating junction temperature

range from –40°C to +125°C.

Features

? Input Voltage: 2.7V to 5.5V

? Output Voltage: Fixed or Adjustable (0.62V to 3.6V)

? Up to 2A Output Current

? Up to 93 Peak Efficiency

? 85 Typical Efficiency at 1 mA

? Power Good (PG) Output

? Programmable Soft-Start

? 22 μA Typical Quiescent Current

? 4 MHz PWM Operation in Continuous Mode

? Ultra-Fast Transient Response

? Low Ripple Output Voltage:

- 35 mVPP Ripple in HyperLight Load? Mode

- 5 mV Output Voltage Ripple in Full PWM Mode

? Fully Integrated MOSFET Switches

? 0.01 μA Shutdown Current

? Thermal Shutdown and Current Limit Protection

? 10-Pin 2.5 mm x 2.5 mm Thin DFN Package

? –40°C to +125°C Junction Temperature Range

Applications

? Solid State Drives (SSD)

? Mobile Handsets

? Portable Media/MP3 Players

? Portable Navigation Devices (GPS)

? WiFi/WiMax/WiBro Modules

? Wireless LAN Cards

? Portable Applications