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