MP4350

NOT RECOMMENDED FOR NEW DESIGNS

2.5A, 4MHz, 20V Step-Down Converter

ALTERNATIVE PART

NRFND Datasheet

MP4350 continues to be in production for existing customers. Please consider this alternative for new designs:

MP2393GTL-Z

24V, 3A, 650kHz, Synchronous Step-Down Converter with PG, SS, in 1.6x2.1mm SOT583 Package

Features & Benefits

Wide 4.2V to 24V Operating Input Range
75mΩ/40mΩ Low R_DS(ON)Internal Power MOSFETs
200µA Low I_Q
High-Efficiency Synchronous Mode Operation
Power-Save Mode (PSM) at Light Load
Fast Load Transient Response
650kHz Switching Frequency
Programmable Soft-Start (SS) Time
Power Good (PG) Indication
Over-Current Protection (OCP) and Hiccup
Pre-Bias Start-Up
Thermal Shutdown
Available in a SOT583 (1.6mmx2.1mm) Package

… and many more!

Description

The MP4350 is a high frequency step-down switching regulator with an integrated internal high-side high voltage power MOSFET. It provides 2.5A output with current mode control for fast loop response and easy compensation. The wide 4.5V to 20V input range accommodates a variety of step-down applications, including those in an automotive input environment. A 100µA operational quiescent current allows use in battery-powered applications. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition to reduce the switching and gate driving losses. The frequency foldback helps prevent inductor current runaway during startup and thermal shutdown provides reliable, fault tolerant operation. By switching at 4MHz, the MP4350 is able to prevent switching related EMI (Electromagnetic Interference) noise problems, such as those found in AM radio and ADSL applications. The MP4350 is available in a small 3mm x 3mm 10-pin QFN package.