DESCRIPTION
The MP2174C is a monolithic, step-down,
switch mode converter with built-in, internal
power MOSFETs. It achieves 4A of continuous
output current from a 2.7V to 5.5V input voltage
with excellent load and line regulation. The
output voltage can be regulated as low as 0.6V.
The constant-on-time (COT) control scheme
provides fast transient response and easy loop
stabilization.
Fault condition protections include
cyclebycycle
current limit and thermal
shutdown.
The MP2174C requires a minimal number of
readily available, standard external
components, and is available in an ultra-small
QFN-12 (2mmx2mm) package.
The MP2174C is ideal for a wide range of
applications, including PDAs, portable
instruments, DVD drives, and small handheld
devices.

FEATURES
 Forced PWM Mode Operation
 Wide 2.7V to 5.5V Operating Input Range
 Output Voltage as Low as 0.6V
 4A Output Current
 35mΩ and 18mΩ Internal Power MOSFET
 Peak Efficiency Above 96%
 1.1MHz Frequency
 100% Duty Cycle in Dropout
 0.5ms Internal Soft-Start Time
 EN and Power Good for Power Sequencing
 Auto-Discharge at Power-Off
 Short-Circuit Protection with Hiccup Mode
 Available in a QFN-12 (2mmx2mm)
Package

APPLICATIONS
 Storage Drives
 Portable/Handheld Devices
 Low-Voltage I/O System Power