Microchip MIC45116 Handleiding

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 2016 Microchip Technology Inc.DS20005571A-page 1

MIC45116

Features

•Up to 6A Output Current

•>93% Peak Efficiency

•Output Voltage of 0.8V to 85% of Input with ±1%

Accuracy

•Fixed 600 kHz Switching Frequency

•Enable Input and Open-Drain Power Good Output

•HyperLight Load® (MIC45116-1) Improves Light

Load Efficiency

•Hyper Speed Control®(MIC45116-2) Architecture

Enables Fast Transient Response

•Supports Safe Start-Up into Pre-Biased Output

•–40°C to +125°C Junction Temperature Range

•Thermal Shutdown Protection

•Short-Circuit Protection with Hiccup Mode

•Adjustable Current Limit

•Available in 52-Pin 8 mm x 8 mm x 3 mm QFN

Package

Applications

•High Power Density Point-of-Load Conversion

•Servers, Routers, Networking, and Base Stations

•FPGAs, DSP, and Low-Voltage ASIC Power

Supplies

•Industrial and Medical Equipment

General Description

The MIC45116 is a synchronous step-down regulator

module, featuring a unique adaptive ON-time control

architecture. The module incorporates a DC/DC

controller, power MOSFETs, bootstrap diode, bootstrap

capacitor, and an inductor in a single package;

simplifying the design and layout process for the end

user.

This highly integrated solution expedites system

design and improves product time-to-market. The

internal MOSFETs and inductor are optimized to

achieve high efficiency at a low output voltage. The fully

optimized design can deliver up to 6A current under a

wide input voltage range of 4.75V to 20V without

requiring additional cooling.

The MIC45116-1 uses HyperLight Load®(HLL) which

maintains high efficiency under light load conditions by

transitioning to variable frequency, discontinuous-

mode operation. The MIC45116-2 uses Hyper Speed

Control®architecture which enables ultra-fast load

transient response, allowing for a reduction of output

capacitance. The MIC45116 offers 1% output accuracy

that can be adjusted from 0.8V to 85% of the input

(PVIN) with two external resistors. Additional features

include thermal-shutdown protection, adjustable

current limit, and short-circuit protection. The

MIC45116 allows for safe start-up into a pre-biased

output.

Typical Application Circuit

MIC45116

8x8x3 QFN

MIC45116

VIN

CIN

10k

PVDD

5VDD

PG

PVIN

VIN

EN

PGND

ILIM

SW

FB

VOUT

VOUT

COUT

CFF RFB1

RFB2

RINJ

CINJ

RLIM

20V/6A DC/DC Power Module

Product specificaties