MP8761

MP8761

NOT RECOMMENDED FOR NEW DESIGNS

High Efficiency, 8A, 18V Synchronous Step-down Converter with SS and PG

ALTERNATIVE PART

NRFND Datasheet

MP8761 continues to be in production for existing customers. Please consider this alternative for new designs:

MP8770GQ-Z

17V, 8A, 700kHz, High-Efficiency, Synchronous, Step-Down

Features & Benefits

Wide 3V to 17V Operating Input Range
8A Output Current
22mΩ/10mΩ Low RDS(ON) Internal Power MOSFETs
100μA Quiescent Current
Output Adjustable from 0.6V
High-Efficiency Synchronous Mode Operation
Pre-Biased Start-Up
Fixed 700kHz Switching Frequency
External Programmable Soft Start-Up Time
EN and Power Good for Power Sequencing
Over-Current Protection (OCP) and Hiccup
Thermal Shutdown
Available in a QFN-16 (3mmx3mm) Package

… and many more!

Description

The MP8761 is a fully-integrated, high-frequency, synchronous, rectified, step-down, switch-mode converter. It offers a very compact solution to achieve a 8A output current over a wide input-supply range with excellent load and line regulation. The MP8761 operates at high efficiency over a wide output-current load range.
The MP8761 uses Constant-On-Time (COT) control mode to provide fast transient response and ease loop stabilization.
An external resistor programs the operating frequency from 200kHz to 1MHz. The frequency stays nearly constant as the input supply varies with the feed-forward compensation.
The default under voltage lockout threshold is 4.1V, but a resistor network on the enable pin can increase this threshold. The soft start pin controls the output voltage startup ramp. An open drain power good signal indicates that the output is within nominal voltage range.
It has full integrated protection features that include over-current protection, over-voltage protection and thermal shutdown.
The MP8761 is available in a 3mm×4mm QFN package, and requires a minimal number of readily-available components.