MICREL MIC4422CN, MIC4421CT, MIC4422BM, MIC4422BN, MIC4422CM Datasheet

MIC4421/4422 Micrel

MIC4421/4422

9A-Peak Low-Side MOSFET Driver

Bipolar/CMOS/DMOS Process

General Description

MIC4421 and MIC4422 MOSFET drivers are rugged, effi­cient, 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 mar­gin. The MIC4421/4422 accepts any logic input from 2.4V to
VS without external speed-up capacitors or resistor net­works. 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 MOSFET 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.

Features

• BiCMOS/DMOS Construction

• Latch-Up Proof: Fully Isolated Process is Inherently
Immune to Any Latch-up.

• 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

S

S

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

Functional Diagram

IN

2kΩ

0.1mA

0.3mA

MIC4421

INVERTING

MIC4422

NON-INVERTING

V

GND

S

OUT

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MIC4421/4422 Micrel

Ordering Information

Part No. Temperature Range Package Configuration

MIC4421CN 0°C to +70°C 8-Pin PDIP Inverting
MIC4421BN –40°C to +85°C 8-Pin PDIP Inverting
MIC4421CM 0°C to +70°C 8-Pin SOIC Inverting
MIC4421BM –40°C to +85°C 8-Pin SOIC Inverting
MIC4421CT 0°C to +70°C 5-Pin TO-220 Inverting
MIC4422CN 0°C to +70°C 8-Pin PDIP Non-Inverting
MIC4422BN –40°C to +85°C 8-Pin PDIP Non-Inverting
MIC4422CM 0°C to +70°C 8-Pin SOIC Non-Inverting
MIC4422BM –40°C to +85°C 8-Pin SOIC Non-Inverting
MIC4422CT 0°C to +70°C 5-Pin TO-220 Non-Inverting

Pin Configurations

TAB

VS

IN

NC

GND

1
2
3
4

Plastic DIP (N)

SOIC (M)

TO-220-5 (T)

VS

8
7

OUT

6

OUT

5

GND

5 OUT
4 GND
3VS
2 GND
1IN

5

Pin Description

Pin Number Pin Number Pin Name Pin Function

TO-220-5 DIP, SOIC

1 2 IN Control Input

2, 4 4, 5 GND Ground: Duplicate pins must be externally connected together.

3, TAB 1, 8 V

5 6, 7 OUT Output: Duplicate pins must be externally connected together.

3 NC Not connected.

S

April 1998 5-43

Supply Input: Duplicate pins must be externally connected together.

MIC4421/4422 Micrel

Absolute Maximum Ratings (Notes 1, 2 and 3)

Supply Voltage ..............................................................20V

Input Voltage ..................................VS + 0.3V to GND – 5V

Input Current (VIN > VS) ............................................50 mA

Power Dissipation, TA ≤ 25°C

PDIP....................................................................960mW

SOIC .................................................................1040mW

Operating Ratings

Junction Temperature ............................................... 150°C

Ambient Temperature

C Version ................................................... 0°C to +70°C

B Version................................................–40°C to +85°C

Thermal Resistance

5-Pin TO-220 (θJC)..............................................10°C/W

5-Pin TO-220..............................................................2W

Power Dissipation, T

CASE

≤ 25°C

5-Pin TO-220.........................................................12.5W

Derating Factors (to Ambient)

PDIP................................................................7.7mW/°C

SOIC ...............................................................8.3mW/°C

5-Pin TO-220....................................................17mW/°C

Storage Temperature ...............................–65°C to +150°C

Lead Temperature (10 sec)....................................... 300°C

Electrical Characteristics: (T

Symbol Parameter Conditions Min Typ Max Units
INPUT

V

IH

V

IL

V

IN

I

IN

OUTPUT

V

OH

V

OL

R

O

R

O

I

PK

I

DC

I

R

SWITCHING TIME (Note 3)
t

R

t

F

t

D1

t

D2

Power Supply

I

S

V

S

Logic 1 Input Voltage 2.4 1.3 V
Logic 0 Input Voltage 1.1 0.8 V
Input Voltage Range –5 VS+0.3 V
Input Current 0 V ≤ VIN ≤ V

High Output Voltage See Figure 1 VS–.025 V
Low Output Voltage See Figure 1 0.025 V
Output Resistance, I

Output High
Output Resistance, I

Output Low
Peak Output Current VS = 18 V (See Figure 5) 9 A
Continuous Output Current 2 A
Latch-Up Protection Duty Cycle ≤ 2% >1500 mA

Withstand Reverse Current t ≤ 300 µs

Rise Time Test Figure 1, CL = 10,000 pF 20 75 ns
Fall Time Test Figure 1, CL = 10,000 pF 24 75 ns
Delay Time Test Figure 1 15 60 ns
Delay Time Test Figure 1 35 60 ns

Power Supply Current VIN = 3 V 0.4 1.5 mA

Operating Input Voltage 4.5 18 V

= 25°C with 4.5 V ≤ V

A

= 10 mA, VS = 18 V 0.6 Ω

OUT

= 10 mA, VS = 18 V 0.8 1.7 Ω

OUT

VIN = 0 V 80 150 µA

≤ 18 V unless otherwise specified.)

S

S

–10 10 µA

5-44 April 1998