Microchip MIC22705 Handleiding

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 2020 Microchip Technology Inc.DS20006307A-page 1

MIC22705

Features

•Input Voltage Range: 2.9V to 5.5V

•Output Voltage Adjustable Down to 0.7V

•Output Load Current Up to 7A

•Safe Start-Up into a Pre-Biased Output Load

•Full Sequencing and Tracking Ability

•Power Good Output

•Efficiency >95% Across a Broad Load Range

•Ultra-Fast Transient Response

•Easy RC Compensation

•100% Maximum Duty Cycle

•Fully Integrated MOSFET Switches

•Thermal Shutdown and Current-Limit Protection

•24-Pin 4 mm x 4 mm QFN

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

Applications

•High Power Density Point-of-Load Conversion

•Servers, Routers, and Base Stations

•Blu-Ray/DVD Players and Recorders

•Computing Peripherals

•FPGAs, DSP, and Low Voltage ASIC Power

General Description

The MIC22705 is a highly efficient, 7A, integrated

switch, synchronous buck (step-down) regulator. The

MIC22705 is optimized for highest efficiency, achieving

more than 95% efficiency while still switching at 1 MHz

over a broad range. The ultra-high speed control loop

keeps the output voltage within regulation even under

extreme transient load swings commonly found in

FPGAs and low-voltage ASICs. The output voltage is

pre-bias safe and can be adjusted down to 0.7V to

address all low-voltage power needs.

The MIC22705 offers a full range of sequencing and

tracking options. The Enable/Delay (EN/DLY) pin,

combined with the Power Good (PG) pin, allows

multiple outputs to be sequenced in any way during

turn-on and turn-off. The Ramp Control (RC) pin allows

the device to be connected to another product in the

MIC22xxx and/or MIC68xxx family, to keep the output

voltages within a certain V on start-up.∆

The MIC22705 is available in a 24-pin 4mm x 4mm

QFN with a junction operating range from –40°C to

+125°C.

Package Type

MIC22705

24-Lead 4 mm x 4 mm QFN (ML)

(Top View)

PVIN

EN/DLY

NC

RC

PG

PVIN

PVIN

SVIN

SGND

COMP

FB

PVIN

PGND

SW

SW

SW

SW

PGND

PGND

SW

SW

SW

SW

PGND

EP

1

2

3

4

5

6

7 8 9101112

13

14

15

16

17

18

19202122

2324

1 MHz, 7A Integrated Switch, High Efficiency Synchronous Buck Regulator

Product specificaties