MICREL MIC4429BN, MIC4429CM, MIC4429CN, MIC4429CT, MIC4429BM Datasheet

MIC4420/4429 Micrel

MIC4420/4429

6A-Peak Low-Side MOSFET Driver

Bipolar/CMOS/DMOS Process

General Description

MIC4420, MIC4429 and MIC429 MOSFET drivers are
tough, efficient, and easy to use. The MIC4429 and MIC429
are inverting drivers, while the MIC4420 is a non-inverting
driver.

They are capable of 6A (peak) output and can drive the
largest MOSFETs with an improved safe operating mar­gin. The MIC4420/4429/429 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.

MIC4420/4429/429 drivers can replace three or more dis­crete components, reducing PCB area requirements,
simplifying product design, and reducing assembly cost.

Modern BiCMOS/DMOS construction guarantees freedom
from latch-up. The rail-to-rail swing capability insures ad­equate gate voltage to the MOSFET during power up/
down sequencing.

Features

• CMOS Construction

• Latch-Up Protected: Will Withstand >500mA
Reverse Output Current

• Logic Input Withstands Negative Swing of Up to 5V

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

• High Peak Output Current............................... 6A Peak

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

• High Capacitive Load Drive........................... 10,000pF

• Low Delay Time .............................................55ns Typ

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

• Low Equivalent Input Capacitance (typ)................. 6pF

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

• Low Output Impedance .........................................2.5Ω

• Output Voltage Swing Within 25mV of Ground or V

S

S

Applications

• Switch Mode Power Supplies

• Motor Controls

• Pulse Transformer Driver

• Class-D Switching Amplifiers

Functional Diagram

IN

2kΩ

0.1mA

0.4mA

V

S

MIC4429

INVERTING

OUT

MIC4420

NON-INVERTING

GND

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MIC4420/4429 Micrel

Ordering Information

Part No. Temperature Range Package Configuration

MIC4420CN 0°C to +70°C 8-Pin PDIP Non-Inverting
MIC4420BN –40°C to +85°C 8-Pin PDIP Non-Inverting
MIC4420CM 0°C to +70°C 8-Pin SOIC Non-Inverting
MIC4420BM –40°C to +85°C 8-Pin SOIC Non-Inverting

MIC4420BMM –40°C to +85°C 8-Pin MSOP Non-Inverting

MIC4420CT 0°C to +70°C 5-Pin TO-220 Non-Inverting
MIC4429CN 0°C to +70°C 8-Pin PDIP Inverting
MIC4429BN –40°C to +85°C 8-Pin PDIP Inverting
MIC4429CM 0°C to +70°C 8-Pin SOIC Inverting
MIC4429BM –40°C to +85°C 8-Pin SOIC Inverting

MIC4429BMM –40°C to +85°C 8-Pin MSOP Inverting

MIC4429CT 0°C to +70°C 5-Pin TO-220 Inverting

Pin Configurations

TAB

VS

IN

NC

GND

1
2
3
4

Plastic DIP (N)

SOIC (M)

MSOP (MM)

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

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.

April 1998 5-33

DIP, SOIC, MSOP

S

3 NC Not connected.

Supply Input: Duplicate pins must be externally connected together.

MIC4420/4429 Micrel

Absolute Maximum Ratings (Notes 1, 2 and 3)

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

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

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

Power Dissipation, TA ≤ 25°C

PDIP................................................................... 960W

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

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

Operating Ratings

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

Ambient Temperature

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

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

Package Thermal Resistance

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

8-pin MSOP (θJA) .......................................... 250°C/W

Power Dissipation, TC ≤ 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

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 1.4 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–0.025 V
Low Output Voltage See Figure 1 0.025 V
Output Resistance, I

Output Low
Output Resistance, I

Output High
Peak Output Current VS = 18 V (See Figure 5) 6 A
Latch-Up Protection >500 mA

Withstand Reverse Current

Rise Time Test Figure 1, CL = 2500 pF 12 35 ns
Fall Time Test Figure 1, CL = 2500 pF 13 35 ns
Delay Time Test Figure 1 18 75 ns
Delay Time Test Figure 1 48 75 ns

Power Supply Current VIN = 3 V 0.45 1.5 mA

Operating Input Voltage 4.5 18 V

= 25°C with 4.5V ≤ V

A

= 10 mA, VS = 18 V 1.7 2.8 Ω

OUT

= 10 mA, VS = 18 V 1.5 2.5 Ω

OUT

VIN = 0 V 90 150 µA

≤ 18V unless otherwise specified.)

S

S

–10 10 µA

5-34 April 1998