MIC4422 Micrel Semiconductor, MIC4422 Datasheet

MIC4422

Manufacturer Part Number

MIC4422

Description

DIP-8

Manufacturer

Micrel Semiconductor

Datasheets

1.MIC4422.pdf (12 pages)

2.MIC4422.pdf (12 pages)

Specifications of MIC4422

Date_code

05+

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MIC4421/4422

General Description

MIC4421 and MIC4422 MOSFET drivers are rugged, ef-

ﬁcient, and easy to use. The MIC4421 is an inverting driver,

while the MIC4422 is a non-inverting driver.

Both versions are capable of 9A (peak) output and can drive

the largest MOSFETs with an improved safe operating mar-

gin. The MIC4421/4422 accepts any logic input from 2.4V to

Proprietary circuits allow the input to swing negative by as

much as 5V without damaging the part. Additional circuits

protect against damage from electrostatic discharge.

MIC4421/4422 drivers can replace three or more discrete

components, reducing PCB area requirements, simplifying

product design, and reducing assembly cost.

Modern Bipolar/CMOS/DMOS construction guarantees

freedom from latch-up. The rail-to-rail swing capability of

CMOS/DMOS insures adequate gate voltage to the MOS-

FET during power up/down sequencing. Since these devices

are fabricated on a self-aligned process, they have very low

crossover current, run cool, use little power, and are easy

to drive.

Functional Diagram

August 2005

without external speed-up capacitors or resistor networks.

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

2kΩ

0.1mA

0.3mA

NONINVERTING

IN V E R T I N G

Features

• BiCMOS/DMOS Construction

• Latch-Up Proof: Fully Isolated Process is Inherently

• Input Will Withstand Negative Swing of Up to 5V

• Matched Rise and Fall Times ............................... 25ns

• High Peak Output Current ...............................9A Peak

• Wide Operating Range .............................. 4.5V to 18V

• High Capacitive Load Drive ........................... 47,000pF

• Low Delay Time .............................................30ns Typ.

• Logic High Input for Any Voltage from 2.4V to V

• Low Equivalent Input Capacitance (typ) ................. 7pF

• Low Supply Current .............. 450µA With Logic 1 Input

• Low Output Impedance .........................................1.5Ω

• Output Voltage Swing to Within 25mV of GND or V

Applications

• Switch Mode Power Supplies

• Motor Controls

• Pulse Transformer Driver

• Class-D Switching Ampliﬁers

• Line Drivers

• Driving MOSFET or IGBT Parallel Chip Modules

• Local Power ON/OFF Switch

• Pulse Generators

MIC4422

MIC4421

Immune to Any Latch-up.

9A-Peak Low-Side MOSFET Driver

Bipolar/CMOS/DMOS

MIC4421/4422

GND

OUT

Process

M9999-081005

Micrel, Inc.

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