MIC4451/4452
12A-Peak Low-Side MOSFET Driver
Bipolar/CMOS/DMOS Process
General Description
MIC4451 and MIC4452 CMOS MOSFET drivers are
robust, 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 V
S
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.
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
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.
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 V
S
•
Low supply current 450µA with logic 1 input
•
Low output impedance: 1.0Ω
•
Output voltage swing to within 25mV of GND or V
S
•
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
____________________________________________________________________________________________________________
V
S
Functional Diagram
0.3mA
0.1mA
MIC4451
INVERTING
OUT
IN
2kΩ
MIC4452
NONINVERTING
GND
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (
408
) 944-01200 • fax + 1 (408) 474-1000 •
http://www.micrel.com
October 2011
M9999-103111-B
Micrel Inc.
MIC4451/4452
Absolute Maximum Ratings
(1, 2)
Supply Voltage ..............................................................20V
Input Voltage .................................... V
S
+ 0.3V to GND
−5V
Input Current (V
IN
> V
S
) .................................................5mA
Power Dissipation, T
AMBIENT
≤
25°C
PDIP ..................................................................960mW
SOIC ................................................................1040mW
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(10s) ............................................ 300°C
Operating Ratings
Operating Temperature (Chip) .................................. 150°C
Operating Temperature (Ambient)
Z Version .................................................. 0°C to +70°C
Y Version .............................................
−40°C
to + 85°C
V Version ...........................................
−40°C
to + 125°C
Thermal Impedances (To Case)
5-Pin TO-220(θJC) ........................................... 10°C/W
Electrical Characteristics
(3)
Symbol
Input
V
IH
V
IL
V
IN
I
IN
Output
V
OH
V
OL
R
O
R
O
I
PK
I
DC
I
R
High Output Voltage
Low Output Voltage
Output Resistance,
Output High
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
Parameter
(T
A
= 25
o
C, with 4.5V
≤
V
S
≤
18V unless otherwise specified.)
Condition
Min.
2.4
−5
0
≤
V
IN
≤
V
S
See Figure 1
See Figure 1
I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
V
S
= 18V (See Figure 6)
2
Duty Cycle
≤
2%
t
≤
300μs
Test Figure 1, C
L
= 15,000pF
Test Figure 1, C
L
= 15,000pF
Test Figure 1
Test Figure 1
V
IN
= 3V
V
IN
= 0V
4.5
>1500
0.6
0.8
12
−10
V
S
−.025
0.025
1.5
1.5
Typ.
1.3
1.1
0.8
V
S
+ .3
10
Max.
Units
V
V
V
μA
V
V
Ω
Ω
A
A
mA
Output Resistance, Output Low
Peak Output Current
Continuous Output Current
Latch-up Protection
Withstand Reverse Current
Rise Time
Fall Time
Delay Time
Delay Time
Switching Time
(3)
t
R
t
F
t
D1
t
D2
20
24
25
40
0.4
80
40
50
50
60
1.5
150
ns
ns
ns
ns
mA
μA
V
Power Supply
I
S
V
S
Power Supply Current
Operating Input Voltage
October 2011
3
M9999-103111-B
Micrel Inc.
MIC4451/4452
Electrical Characteristics
(Over operating temperature range with 4.5V
≤
V
S
≤
18V unless otherwise specified.)
Symbol
Input
V
IH
V
IL
V
IN
I
IN
Output
V
OH
V
OL
R
O
R
O
High Output Voltage
Low Output Voltage
Output Resistance, Output High
Output Resistance,
Output Low
Rise Time
Fall Time
Delay Time
Delay Time
See Figure 1
See Figure 1
I
OUT
= 10mA, V
S
= 18V
I
OUT
= 10mA, V
S
= 18V
V
S
−
.025
0.025
2.2
2.2
V
V
Ω
Ω
Logic 1 Input Voltage
Logic 0 Input Voltage
Input Voltage Range
Input Current
0
≤
V
IN
≤
V
S
−5
−10
2.4
0.8
V
S
+ .3
10
V
V
V
μA
Parameter
Condition
Min.
Typ.
Max.
Units
Switching Time
(3)
t
R
t
F
t
D1
t
D2
Test Figure 1, C
L
= 15,000pF
Test Figure 1, C
L
= 15,000pF
Test Figure 1
Test Figure 1
V
IN
= 3V
V
IN
= 0V
4.5
50
60
65
80
3
0.4
18
V
ns
ns
ns
ns
mA
Power Supply
I
S
V
S
Notes:
1. Functional operation above the absolute maximum stress ratings is not implied.
2. Static-sensitive device. Store only in conductive containers. Handling personnel and equipment should be grounded to prevent damage from static
discharge.
3. Specification for packaged product only.
Power Supply Current
Operating Input Voltage
October 2011
4
M9999-103111-B
能源基础设施
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