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PDF MIC4452BM Data sheet ( Hoja de datos )
| Número de pieza | MIC4452BM | |
| Descripción | 12A-Peak Low-Side MOSFET Driver Bipolar/CMOS/DMOS Process | |
| Fabricantes | Micrel Semiconductor | |
| Logotipo |  |
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MIC4451/4452
MIC4451/4452
Micrel
12A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4451 and MIC4452 CMOS MOSFET drivers are tough,
efficient, and easy to use. The MIC4451 is an inverting
driver, while the MIC4452 is a non-inverting driver.
Both versions are capable of 12A (peak) output and can
drive the largest MOSFETs with an improved safe operating
margin. The MIC4451/4452 accepts any logic input from
2.4V to VS without external speed-up capacitors or resistor
networks. Proprietary circuits allow the input to swing nega-
tive by as much as 5V without damaging the part. Additional
circuits protect against damage from electrostatic discharge.
MIC4451/4452 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 free-
dom from latch-up. The rail-to-rail swing capability of CMOS/
DMOS insures adequate gate voltage to the MOSFET dur-
ing 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 ............................ 12A Peak
• Wide Operating Range .............................. 4.5V to 18V
• High Capacitive Load Drive ........................... 62,000pF
• Low Delay Time ........................................... 30ns Typ.
• Logic High Input for Any Voltage from 2.4V to VS
• Low Supply Current .............. 450µA With Logic 1 Input
• Low Output Impedance ........................................ 1.0Ω
• Output Voltage Swing to Within 25mV of GND or VS
• Low Equivalent Input Capacitance (typ) ................. 7pF
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
0.1mA
IN 2kΩ
0.3mA
MIC4451
INVERTING
VS
MIC4452
NONINVERTING
GND
OUT
5-70
April 1998
1 page  
MIC4451/4452
Typical Characteristic Curves
Rise Time
vs. Supply Voltage
220
200
180
160
140
120 47,000pF
100
80
60 22,000pF
40 10,000pF
20
0 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
Fall Time
vs. Supply Voltage
220
200
180
160
140
120 47,000pF
100
80
60 22,000pF
40 10,000pF
20
0 4 6 8 10 12 14 16 18
SUPPLY VOLTAGE (V)
Rise Time
vs. Capacitive Load
300
250
5V
200
150
10V
100
50 18V
0 100
1000
10k
100k
CAPACITIVE LOAD (pF)
Fall Time
vs. Capacitive Load
300
250
200 5V
150
10V
100
18V
50
0 100
1000
10k
100k
CAPACITIVE LOAD (pF)
Supply Current
vs. Capacitive Load
220
200 VS = 18V
180
160
140
120
100
1 MHz
80
60
40
20
0 100
1000
10k
100k
CAPACITIVE LOAD (pF)
Supply Current
vs. Capacitive Load
150
VS = 12V
120
90
60
30 1 MHz
0 100
1000
10k
100k
CAPACITIVE LOAD (pF)
Supply Current
vs. Frequency
180
VS = 18V
160
140
120
100
80
60
40
20
0 10k
100k
1M
FREQUENCY (Hz)
10M
Supply Current
vs. Frequency
120
VS = 12V
100
80
60
40
20
0 10k
100k
1M
FREQUENCY (Hz)
10M
5-74
Micrel
Rise and Fall Times
vs. Temperature
60
CL = 10,000pF
50 VS = 18V
40 tFALL
30
20 tRISE
10
0 -40 0 40 80 120
TEMPERATURE (°C)
Crossover Energy
vs. Supply Voltage
10-7
PER TRANSITION
10-8
10-9 4 6 8 10 12 14 16 18
VOLTAGE (V)
Supply Current
vs. Capacitive Load
75
VS = 5V
60
45
30
15 1 MHz
0 100
1000
10k
100k
CAPACITIVE LOAD (pF)
Supply Current
vs. Frequency
60
VS = 5V
50
40
30
20
10
0 10k
100k
1M
FREQUENCY (Hz)
10M
April 1998
5 Page | ||
| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet MIC4452BM.PDF ] | |
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