DESCRIPTION

The MP28162 is a high-efficiency, low

quiescent current (IQ), buck-boost converter that

operates from an input voltage (VIN) exceeding,

below, or equal to the output voltage (VOUT).

The device provides a compact solution for

products powered by single-cell Li-ion or multicell alkaline batteries, where VOUT is within the

battery voltage (VBATT) range.

Current-mode control and the fixed pulse-width

modulation (PWM) frequency provide optimal

stability and transient response. The fixed

2MHz switching frequency (fREQ) and integrated,

low on resistance (RDS(ON)) MOSFETs reduce

the solution size and maintain high efficiency.

To optimize battery life, the MP28162 employs

selectable pulse-skip mode to reduce fREQ

under light-load conditions. For low-noise

applications where pulse-skip mode may cause

interference, a high-logic input on the

MODE/SYNC pin ensures that the part

operates in fixed-frequency PWM mode under

all load conditions.

The MP28162 is available in a small WLCSP15 (1.3mmx2.1mm) package.

FEATURES

• 1.8V Minimum Start-Up Input Voltage (VIN)

• 1.2V to 5.5V Operating VIN Range

• 1.5V to 5.5V Output Voltage (VOUT) Range

• 1.5A Switching Current Limit

• 2MHz Fixed Switching Frequency (fREQ) or

External Synchronous fREQ

• Selectable Pulse-Skip Mode or Pulse-Width

Modulation (PWM) Mode

• 25μA Typical Quiescent Current (IQ)

• Load Disconnect during Shutdown

• Internal Soft Start (SS) and Compensation

• Short-Circuit Protection (SCP) with Hiccup

Mode

• Over-Temperature Protection (OTP)

• Available in a Small WLCSP-15

(1.3mmx2.1mm) Package

APPLICATIONS

• Optical Modules

• Portable Instruments

• Battery-Powered Devices