mic4422a Micrel Semiconductor, mic4422a Datasheet

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mic4422a

Manufacturer Part Number
mic4422a
Description
Mic4421a/mic4422a 9a Peak Low-side Mosfet Driver
Manufacturer
Micrel Semiconductor
Datasheet

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General Description
MIC4421A and MIC4422A MOSFET drivers are rugged,
efficient, and easy to use. The MIC4421A is an inverting
driver, while the MIC4422A 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 MIC4421A/4422A accepts any logic
input from 2.4V to V
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.
MIC4421A/4422A 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.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
___________________________________________________________________________________________________________
Typical Application
June 2007
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
S
without external speed-up capacitors
+15V
V
S
1µF
On
Off
0.1µF
0.1µF
Low-Side Power Switch
1
8
2
VS
VS
IN
MIC4422A
GND
OUT
OUT
7
6
4,5
* Siliconix 30m, 7A max.
Voltage
Load voltage limited by MOSFET drain-to-source rating
Features
• High peak-output current: 9A Peak (typ.)
• Wide operating range: 4.5V to 18V (typ.)
• Minimum pulse width: 50ns
• Latch-up proof: fully isolated process is inherently
• Input will withstand negative swing of up to 5V
• High capacitive load drive: 47,000pF
• Low delay time: 15ns (typ.)
• Logic high input for any voltage from 2.4V to V
• Low equivalent input capacitance: 7pF (typ.)
• Low supply current: 500µA (typ.)
• 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
408
Load
immune to any latch-up
) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
Si9410DY*
N-Channel
MOSFET
9A Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
MIC4421A/4422A
M9999-062707
S
S

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mic4422a Summary of contents

Page 1

... General Description MIC4421A and MIC4422A MOSFET drivers are rugged, efficient, and easy to use. The MIC4421A is an inverting driver, while the MIC4422A 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 MIC4421A/4422A accepts any logic input from 2 ...

Page 2

... MIC4421AAM* MIC4421ABM MIC4421AYM MIC4421ACM MIC4421AZM MIC4421ABN MIC4421AYN MIC4421ACN MIC4421AZN MIC4421ACT MIC4421AZT MIC4422AAM* MIC4422ABM MIC4422AYM MIC4422ACM MIC4422AZM MIC4422ABN MIC4422AYN MIC4422ACN MIC4422AZN MIC4422ACT MIC4422AZT * Special order. Contact factory. Pin Configuration GND 8-Pin PDIP (N) 8-Pin SOIC (M) Pin Description Pin Number Pin Number ...

Page 3

... PDIP (θ SOIC (θ TO-220 (θ PDIP (θ SOIC (θ TO-220 (θ < +125°C, unless noted. A Condition (MIC4422A (MIC4421A (MIC4422A (MIC4421A See Figure 3 See Figure 3 0V ≤ V ≤ See Figure 1 See Figure 10mA 18V ...

Page 4

... OUTPUT 1.5V 2.1V Figure 3. Input Hysteresis 4 Min Typ 18V S 0.1µF 0.1µ OUT 10,000pF MIC4422A 5V 90% 10 90% 10% 0V Figure 2. Non-Inverting Driver Switching Time Logic MIC4421A/4422A Max Units ...

Page 5

Micrel, Inc. Typical Characteristics June 2007 5 MIC4421A/4422A M9999-062707 ...

Page 6

Micrel, Inc. Typical Characteristics (continued) June 2007 6 MIC4421A/4422A M9999-062707 ...

Page 7

... Functional Diagram 0.1mA IN Functional Description Refer to the functional diagram. The MIC4422A is a non-inverting driver. A logic high on the IN produces gate drive output. The MIC4421A is an inverting driver. A logic low on the IN produces gate drive output. The output is used to turn on an external N- channel MOSFET. ...

Page 8

... MIC4422A Figure 5. Direct Motor Drive 1N4448 (x2) V +15V IN 0.1µF 50V MIC4422A 0.1µF WIMA MKS2 United Chemcon SXE June 2007 To guarantee low supply impedance over a wide frequency range, a parallel capacitor combination is recommended for supply bypassing. Low inductance ceramic disk capacitor swith short lead lengths (< 0.5 inch) should be used. A 1µ ...

Page 9

Micrel, Inc. Input Stage The input voltage level of the MIC4421A changes the quiescent supply current. The N-Channel MOSFET input stage transistor drives a 320µA current source load. With a logic “1” input, the quiescent supply current is typically 500µA. ...

Page 10

Micrel, Inc. Table 1. MIC4421A Maximum Operating Frequency V S 18V 15V 10V 5V Conditions: θ 150°C 25° 10,000pF L Capacitive Load Power Dissipation Dissipation caused by a capacitive load ...

Page 11

Micrel, Inc Power dissipated in a driver when the output T changes states (“shoot-through current”) in Watts. NOTE: The “shoot-through” current from a dual transition (once up, once down) for both drivers is stated in Figure 7 in ...

Page 12

Micrel, Inc. Package Information 0.018 (0.57) June 2007 PIN 1 DIMENSIONS: INCH (MM) 0.380 (9.65) 0.370 (9.40) 0.135 (3.43) 0.125 (3.18) 0.380 (9.65) 0.130 (3.30) 0.320 (8.13) 0.100 (2.54) 0.0375 (0.952) 8-Pin Plastic DIP (N) 8-Pin SOIC (M) 12 MIC4421A/4422A ...

Page 13

Micrel, Inc. MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no ...

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