DESCRIPTION

The MPQ3425 is a current control mode,

step-up converter with a 3.5A, 90mΩ internal

MOSFET that provides fast transient response.

It operates with an input voltage as low as 3.1V,

and can generate up to 55V.

The MPQ3425 features a configurable

switching frequency of up to 2MHz for easy

filtering and low noise. An external

compensation pin allows the user to flexibly set

loop dynamics and operates with small, low-

ESR ceramic output capacitors. The soft start

feature provides a small inrush current and can

be programmed with an external capacitor.

Full protection features include under-voltage

lockout (UVLO), current limiting, and thermal

shutdown.

The MPQ3425 is available in low-profile QFN-

14 (3mmx4mm) and QFN-14 (4mmx4mm)

packages with an exposed pad. The QFN-14

(4mmx4mm) package is available in a wettable

flank package.

FEATURES

• Wide 3.1V to 22V BIAS Supply Voltage

Range

• Wide 3V to 50V Input Voltage Range

• 3.5A, 90mΩ, Power MOSFET

• Output Voltage up to 55V

• Programmable 300kHz to 2MHz fSW

• Programmable Under-Voltage Lockout

(UVLO), Soft Start, UVLO Hysteresis

• Micropower Shutdown <1μA

• Thermal Shutdown OTP (160°C)

• Available in QFN-14 (3mmx4mm) and QFN-

14 (4mmx4mm) Packages

• QFN-14 (4mmx4mm) Package Is Available

in a Wettable Flank Package

Available in AEC-Q100 Grade 1

APPLICATIONS

• Automotive Systems

• Boost Converter and Single-Ended Primary-

Inductance Converter (SEPIC) Topologies

• Pre-Boost Applications

• Microphones and Tuner Bias