MIC28512 datasheet(1/34 Pages) MICROCHIP

Il numero della parte	MIC28512

Spiegazioni elettronici	70V, 2A Synchronous Buck Regulator

PDF	34 Pages

Scroll/Zoom	100%

Produttore elettronici	MICROCHIP [Microchip Technology]

Homepage	http://www.microchip.com

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 2016 Microchip Technology Inc.

DS20005524A-page 1

MIC28512

Features

• 4.6V to 70V Operating Input Voltage Supply

• Up to 2A Output Current

• Integrated High-Side and Low-Side N-Channel

MOSFETs

• HyperLight Load (MIC28512-1) and Hyper Speed

Control (MIC28512-2) Architecture

• Enable Input and Power Good (PGOOD) Output

• Programmable Current-Limit and Foldback

“Hiccup” Mode Short-Circuit Protection

• Built-In 5V Regulator for Single-Supply Operation

• Adjustable 200 kHz to 680 kHz Switching

Frequency

• Fixed 5 ms Soft-Start

• Internal Compensation and Thermal Shutdown

• Thermally-Enhanced 24-Pin 3 mm x 4 mm

FCQFN Package

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

Applications

• Industrial Power Supplies

• Distributed Supply Regulation

• Base Station Power Supplies

• Wall Transformer Regulation

• High-Voltage Single-Board Systems

General Description

The MIC28512 is a synchronous step-down switching

regulator with internal power switches capable of

providing up to 2A output current from a wide input

supply range from 4.6V to 70V. The output voltage is

adjustable down to 0.8V with a guaranteed accuracy of

±1%. A constant switching frequency can be

programmed from 200 kHz to 680 kHz. The Hyper

Speed Control® and HyperLight Load® architectures of

the MIC28512 allow for high VIN (low VOUT) operation

and ultra-fast transient response while reducing the

required output capacitance and providing very good

light-load efficiency.

The MIC28512 offers a full suite of features to ensure

protection under fault conditions. These include

undervoltage lockout to ensure proper operation under

power sag conditions, internal soft-start to reduce

inrush current, foldback current-limit, “hiccup” mode

short-circuit protection and thermal shutdown.

Package Type

MIC28512

24-Pin 3 mm x 4 mm FCQFN (FL)

DL

PGND

DH

PVIN

LX

BST

PVDD

VDD

ILIM

VIN

EN

PGOOD

7

8

910

11

12

18

17

16

15

14

13

24

23

22

21

20

19

1

2

3

4

5

6

PVIN

FB

AGND

70V, 2A Synchronous Buck Regulator

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