MP2155

High Efficiency

Single Inductor Buck-Boost Converter

with 2.2A Switches

MP2155 Rev. 1.0

www.MonolithicPower.com

1

1/26/2014

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© 2014 MPS. All Rights Reserved.

The Future of Analog IC Technology

DESCRIPTION

The MP2155 is a highly efficient, low quiescent

current Buck-Boost converter, which operates

from input voltage above, below and equal to

the output voltage. The device provides power

solution for products powered by a one-cell

Lithium-Ion

or

multi-cell

alkaline

battery

applications where the output voltage is within

battery voltage range.

The MP2155 uses a current mode, fixed

frequency PWM control for optimal stability and

transient response. The fixed 1MHz switching

and P-channel MOSFETs minimize the solution

footprint while maintaining high efficiency.

To ensure the longest battery life MP2155 has

an optional pulse skipping mode that reduces

switching frequency under light load conditions.

For other low noise applications where variable

frequency power save mode may cause

interference, the logic control input MODE pin

forces fixed frequency PWM operation under all

load conditions.

The MP2155 operates with input voltage from

2V to 5.5V to provide adjustable output voltage

(1.5V to 5V). With an input from 2.7V to 5.5V it

can supply a maximum 1A current to load at

3.3V output voltage. The MP2155 is available in

small QFN10-3x3mm package.

FEATURES

• High Efficiency up to 95%.

• Load Disconnect During Shutdown

• Input Voltage Range: 2V to 5.5V

• Adjustable Output Voltage from 1.5V to 5V

• 3.3V/1A Load Capability from 2.7V-to-5.5V

Vin

• 1MHz Switching Frequency

• Pulse Skipping Mode at Light Load

• Typical 80μA Quiescent Current

• Internal Loop Compensation for Fast

Response

• Internal Soft Start

• OTP, Hiccup SCP

• Available in Small 3x3mm QFN10 Package

APPLICATIONS

• Battery-Powered Products

• Portable Instruments

• Tablet PCs

• POS Systems

• GSM/GPRS

• System Controls

All MPS parts are lead-free and adhere to the RoHS directive. For MPS green

status, please visit MPS website under Quality Assurance.

“MPS” and “The Future of Analog IC Technology” are Registered Trademarks

of Monolithic Power Systems, Inc.

TYPICAL APPLICATION