DESCRIPTION

The MP9459 is a fully integrated, highfrequency,

synchronous, rectified, step-down,

switch-mode converter with internal power

MOSFETs. The device is a compact solution

that achieves 4A of output current over a wide

input range with excellent load and line

regulation. It uses synchronous mode operation

for higher efficiency over the output current load

range.

Constant-on-time (COT) control operation

provides very fast transient response, easy loop

design, and very tight output regulation.

Full protection features include short-circuit

protection (SCP), over-current protection (OCP),

under-voltage protection (UVP), and thermal

shutdown.

The MP9459 requires a minimal number of

readily available, standard external

components. It is available in a space-saving

SOT563 (1.6mmх1.6mm) package.

FEATURES

 Wide 4.2V to 17V Operating Input Range

 60mΩ/30mΩ Low RDS(ON) Internal Power

MOSFETs

 200μA Low Quiescent Current

 High-Efficiency Synchronous Mode

Operation

 Power-Save Mode at Light Load

 Fast Load Transient Response

 600kHz Switching Frequency

 Internal Soft Start (SS)

 Over-Current Protection (OCP) and Hiccup

Mode

 Thermal Shutdown

 Output Adjustable from 0.8V

 Available in an SOT563 (1.6mmх1.6mm)

Package

APPLICATIONS

 Security Cameras

 Digital Set-Top Boxes

 Flat-Panel Televisions and Monitors

 General Purpose