Datasheet

ManualsBrandsMicrochip ManualsDriversMosfet Driver IC, SOIC-8, 18V

MIC4421/4422 Micrel, Inc.

August 2005 1 M9999-081005

MIC4421/4422

9A-Peak Low-Side MOSFET Driver

Bipolar/CMOS/DMOS Process

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

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 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.

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

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

OUT

MIC4421

IN V ER T I NG

MIC4422

NONINVERTING

0.1mA

0.3m

Ω

GND

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

Summary of content (12 pages)

PAGE 1
MIC4421/4422 Micrel, Inc. MIC4421/4422 9A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process General Description Features 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. • 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 ...............................
PAGE 2
MIC4421/4422 Micrel, Inc. Ordering Information Part Number Standard PbFree MIC4421BM MIC4421YM MIC4421BN MIC4421YN MIC4421CM MIC4421ZM MIC4421CN MIC4421ZN MIC4421CT MIC4421ZT MIC4422BM MIC4422YM MIC4422BN MIC4422YN MIC4422CM MIC4422ZM MIC4422CN MIC4422ZN MIC4422CT MIC4422ZT Conﬁguration Inverting Inverting Inverting Inverting Inverting Non-inverting Non-inverting Non-inverting Non-inverting Non-inverting Temp.
PAGE 3
MIC4421/4422 Micrel, Inc. Absolute Maximum Ratings Operating 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 ..................................................................
PAGE 4
MIC4421/4422 Micrel, Inc. Electrical Characteristics: Symbol (Over operating temperature range with 4.5V ≤ VS ≤ 18V unless otherwise speciﬁed.) Parameter Conditions Min Typ 2.4 1.4 Max Units INPUT VIH Logic 1 Input Voltage VIL Logic 0 Input Voltage V 1.0 0.8 V VIN Input Voltage Range IIN Input Current 0V ≤ VIN ≤ VS –5 VS+0.3 V –10 10 µA VOH High Output Voltage Figure 1 VOL Low Output Voltage Figure 1 0.025 V RO Output Resistance, Output High IOUT = 10mA, VS = 18V 0.
PAGE 5
MIC4421/4422 Micrel, Inc. 0 10k August 2005 100k 1M FREQUENCY (Hz) 10M TIME (ns) 100 60 pF 80 40 20 0 10k 100k 1M FREQUENCY (Hz) 5 10M 16 18 Supply Current vs. Capacitive Load VS = 5V 100 kH z 50 0k H Hz 1M 15 20 30 z 45 60 VS = 12V 8 10 12 14 VOLTAGE (V) 1000 10k CAPACITIVE LOAD (pF) 100k Supply Current vs. Frequency VS = 5V 50 40 30 1000 pF Supply Current vs. Frequency 6 60 0 100k 4 µF z 1000 10k CAPACITIVE LOAD (pF) Crossover Energy vs. Supply Voltage 0.
PAGE 6
MIC4421/4422 Micrel, Inc. Typical Characteristics 20 tD1 10 QUIESCENT SUPPLY CURRENT (µA) 0 4 6 8 10 12 14 16 SUPPLY VOLTAGE (V) 18 Quiescent Supply Current vs. Temperature 1000 VS = 18V INPUT = 1 100 INPUT = 0 10 -40 0 40 80 TEMPERATURE (°C) M9999-081005 120 Propagation Delay vs. Input Amplitude 50 40 30 tD2 20 tD2 tD1 10 0 2 4 6 INPUT (V) tD1 8 TJ = 150°C TJ = 25°C 4 6 8 10 12 14 16 SUPPLY VOLTAGE (V) 6 0 10 High-State Output Resist. vs. Supply Voltage 2.4 2.2 2.0 1.
PAGE 7
MIC4421/4422 Micrel, Inc. Applications Information To guarantee low supply impedance over a wide frequency range, a parallel capacitor combination is recommended for supply bypassing. Low inductance ceramic disk capacitors with short lead lengths (< 0.5 inch) should be used. A 1µF low ESR ﬁlm capacitor in parallel with two 0.1µF low ESR ceramic capacitors, (such as AVX RAM Guard®), provides adequate bypassing. Connect one ceramic capacitor directly between pins 1 and 4.
PAGE 8
MIC4421/4422 Micrel, Inc. Input Stage dissipation limit can easily be exceeded. Therefore, some attention should be given to power dissipation when driving low impedance loads and/or operating at high frequency. The input voltage level of the MIC4421 changes the quiescent supply current. The N channel MOSFET input stage transistor drives a 320µA current source load. With a logic “1” input, the maximum quiescent supply current is 400µA.
PAGE 9
MIC4421/4422 Micrel, Inc. Capacitive Load Power Dissipation Transition Power Dissipation Dissipation caused by a capacitive load is simply the energy placed in, or removed from, the load capacitance by the driver.
PAGE 10
MIC4421/4422 Micrel, Inc. +18 V WIMA MK22 1 µF 5.0V 1 2 0V 0.1µF 8 MIC4421 4 6, 7 5 TEK CURRENT PROBE 6302 0.1µF 18 V 0V 10,000 pF POLYCARBONATE Figure 6.
PAGE 11
MIC4421/4422 Micrel, Inc. Package Information PIN 1 INCH (MM) 0.370 (9.40) 0.245 (6.22) 0.125 (3.18) 0.300 (7.62) 0.013 (0.330) 0.010 (0.254) 0.018 (0.57) 0.130 (3.30) 0.100 (2.54) 0.0375 (0.952) 8-Pin Plastic DIP (N) MAX ) PIN 1 INCHES (MM) 0.150 (3.81) 0.013 (0.33) 45° TYP 0.0040 (0.102) 0.010 (0.25) 0.007 (0.18) 0°–8° 0.189 (4.8) 0.045 (1.14) 0.016 (0.40) PLANE 0.228 (5.
PAGE 12
MIC4421/4422 Micrel, Inc. 0.187 (4.74) 0.112 (2.84) INCH (MM) 0.116 (2.95) 0.038 (0.97) 0.032 (0.81) 0.007 (0.18) 0.005 (0.13) 0.012 (0.30) R 0.012 (0.03) 5° 0° MIN 0.004 (0.10) 0.0256 (0.65) TYP 0.012 (0.03) R 0.035 (0.89) 0.021 (0.53) 8-Pin MSOP (MM) 0.150 D ±0.005 (3.81 D ±0.13) 0.177 ±0.008 (4.50 ±0.20) 0.400 ±0.015 (10.16 ±0.38) 0.050 ±0.005 (1.27 ±0.13) 0.108 ±0.005 (2.74 ±0.13) 0.241 ±0.017 (6.12 ±0.43) 0.578 ±0.018 (14.68 ±0.46) SEATING PLANE 7° Typ. 0.550 ±0.010 (13.97 ±0.