LM5119 Datasheet PDF - National Semiconductor Wide Input Range Dual Synchronous Buck Controller Specs

LM5119 - Wide Input Range Dual Synchronous Buck Controller

Datasheet Summary

Description

The LM5119 is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply.

The control method is based upon current mode control utilizing an emulated current ramp.

Features

include thermal shutdown, frequency synchronization, cycle-by-cycle and hiccup mode current limit and adjustable line under-voltage lockout. The device is available in a power enhanced leadless LLP-32 package featuring an exposed die attach pad to aid thermal dissipation. Features.
Emulated peak current mode control.
Wide operating range from 5.5V to 65V.
Easily configurable for dual outputs or interleaved single.

Datasheet Details

Part number	LM5119
Manufacturer	National Semiconductor
File Size	701.90 KB
Description	Wide Input Range Dual Synchronous Buck Controller
Datasheet	LM5119 Datasheet
Additional preview pages of the LM5119 datasheet.

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Full PDF Text Transcription

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LM5119 Wide Input Range Dual Synchronous Buck Controller September 28, 2010 LM5119 Wide Input Range Dual Synchronous Buck Controller General Description The LM5119 is a dual synchronous buck controller intended for step-down regulator applications from a high voltage or widely varying input supply. The control method is based upon current mode control utilizing an emulated current ramp. Current mode control provides inherent line feed-forward, cycle-by-cycle current limiting and ease of loop compensation. The use of an emulated control ramp reduces noise sensitivity of the pulse-width modulation circuit, allowing reliable control of very small duty cycles necessary in high input voltage applications. The switching frequency is programmable from 50kHz to 750kHz.

Published: Oct 28, 2010 |