MIC4403
Micrel
MIC4403
1.5A-Peak High-Speed Floating-Load Driver
Preliminary Information
General Description
The MIC4403 is a modified version of the MIC4425 power
MOSFET driver, intended to drive floating or isolated loads
requiring high-current pulses. The load is intended to be
connected between the outputs without other reference to
supply or ground. Only when both logic inputs are high and
the V
DD
supply is energized, is power supplied to the load.
This construction allows the implementation of a wide variety
of redundant input controllers.
The low off-state output leakage and independence of the two
half-circuits permit a wide variety of testing schemes to be
utilized to assure functionality. The high peak current capa-
bility, short internal delays, and fast output rise and fall times
ensure sufficient power will be available to the load when it is
needed. The TTL and CMOS compatible inputs allow opera-
tion from a wide variety of input devices. The ability to swing
the inputs negative without affecting device performance
allows negative biases to be placed on the inputs for greater
safety. In addition, the capacitive nature of the inputs allows
the use of series resistors on the inputs for extra noise
suppression.
Input voltage excursions above the supply voltage or below
ground are clamped internally without damaging the device.
The output stages are power CMOS and DMOS FETs with
high speed body diodes to prevent damage to the driver from
inductive kickbacks.
Features
• Built Using Contemporary BiCMOS/DMOS Process
• Latch-Up Protected: Fully Isolated Process is Inherently
Immune to any Latch-Up
• Low Quiescent Current ................................. 300µA Max
• Low Capacitive Inputs With 300mV Hysteresis
• Both Inputs Must Be Driven to Drive Load
• Low Output Leakage
• High Peak Current Capability
• Fast Output Rise Time
• Outputs Individually Testable
• 3A Single Ended (1.5A with Floating Load)
Applications
•
•
•
•
Squib Drivers
Isolated Load Drivers
Pulsers
Safety Interlocks
Ordering Information
Part Number
MIC4403BM
MIC4403BN
Temperature Range
–40°C to +85°C
–40°C to +85°C
Package
8-pin SOIC
8-pin PDIP
6
Functional Diagram
V
DD
0.7mA
0.7mA
UP
UP CTL
DWN CTL
1k
1k
300mV
DWN
300mV
MIC4403
GND
Functional Diagram for One Driver (Four Drivers per Package–Ground Unused Inputs)
Pin Configuration
N.C.
Pull-Down Input Contrtol
GND
Pull-Up Input Control
1
2
3
4
8
N.C.
Pull-Down Output
V DD
Pull-Up Ouput
MIC4403
7
6
5
6-7
MIC4403
Micrel
Package Thermal Resistance
CerDIP
θ
JA
............................................................150°C/W
CerDIP
θ
JC
........................................................ 55°C/W
PDIP
θ
JA
............................................................125°C/W
PDIP
θ
JC
............................................................. 45°C/W
SOIC
θ
JA
.......................................................... 250°C/W
SOIC
θ
JC
............................................................ 75°C/W
Absolute Maximum Ratings (Note 1)
Supply Voltage ........................................................... +22V
Maximum Die Temperature ..................................... +150°C
Storage Temperature Range ....................–65°C to +150°C
Lead Temperature (Soldering, 10 sec) ................... +300°C
Note 1:
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and
functional operation of the device at these or any other conditions above those indicated in the operational sections of the specification is not implied.
Exposure to Absolute Maximum Rating Conditions for extended periods may affect device reliability. Static-sensitive device. Unused devices must
be stored in conductive material. Protect devices from static discharge and static fields.
Electrical Characteristics
Unless otherwise specified, specifications measured at T
A
= 25°C with 4.5V < V
DD
< 18V.
Symbol
Input
V
IH
V
IL
I
IN
Output
V
OH
V
OL
R
O
R
O
I
PK
Parameter
Test Conditions
Min
Typ
Max
Unit
Logic 1 High Input Voltage
Logic 0 Low Input Voltage
Input Current
0V < V
IN
< 5V
DD
2.4
–5
–1
±0.01
V
DD
+ 0.3
0.8
1
V
V
µA
High Output Voltage
Low Output Voltage
Output Resistance, Pull-Up
Output Resistance, Pull-Down
Peak Output Current
I
OUT
= 10mA, V
DD
= 18V
I
OUT
= 10mA, V
DD
= 18V
V
DD
– 0.025
0.025
2.8
3.5
1.5
5
5
V
V
Ω
Ω
A
Switching Time
t
R
t
F
t
D1
t
D2
Rise Time
Fall Time
Delay Time
Delay Time
Figure 1, C
L
= 1800pF
Figure 1, C
L
= 1800pF
Figure 1, C
L
= 1800pF
Figure 1, C
L
= 1800pF
23
25
17
23
35
35
75
75
ns
ns
ns
ns
Power Supply
I
S
Power Supply Current
V
IN
= 3V (both inputs)
V
IN
= 0V (both inputs)
6-8
1.4
0.17
2.5
0.25
mA
mA
MIC4403
Micrel
Electrical Characteristics, continued
Specifications measured
over operating temperature range
with 4.5V
≤
V
DD
≤18V,
unless otherwise specified.
Symbol
Input
V
IH
V
IL
I
IN
Output
V
OH
V
OL
R
O
R
O
Parameter
Test Conditions
Min
Typ
Max
Unit
Logic 1 High Input Voltage
Logic 0 Low Input Voltage
Input Current
0V
≤
V
IN
≤
V
DD
2.4
–5
–10
±0.01
V
DD
+ 0.3
0.8
10
V
V
µA
High Output Voltage
Low Output Voltage
Output Resistance, Pull-Up
Output Resistance, Pull-Down
I
OUT
= 10mA, V
DD
= 18V
V
IN
≥
2.4V
I
OUT
= –10mA, V
DD
= 18V
V
IN
≥
2.4V
V
DD
– 0.025
0.025
3.7
5.5
8
8
V
V
Ω
Ω
Switching Time
t
R
t
F
t
D1
t
D2
Rise Time
Fall Time
Delay Time
Delay Time
Figure 1, C
L
= 1800pF
Figure 1, C
L
= 1800pF
Figure 1, C
L
= 1800pF
Figure 1, C
L
=1800pF
24
32
19
19
60
60
100
100
ns
ns
ns
ns
6
Power Supply
I
S
Power Supply Current
V
IN
= 3V (both inputs)
V
IN
= 0V (both inputs)
1.6
0.25
3.5
0.3
mA
mA
V S = 18V
4.7µF
0.1µF
+5V
6
V S = 18V
4.7µF
0.1µF
+5V
INPUT
0.4V
10kΩ
INPUT
0.4V
10%
tD1
CL = 1800pF
2
INPUT
6
10%
tD2
90%
2
7
1
1
7
OUTPUT
CL = 1800pF
4
INPUT
2
5
OUTPUT
OUTPUT
10%
10kΩ
90%
tR
16V
4
2
5
16V
10%
OUTPUT
tF
0V
3
0V
3
Figure 1.
MIC4403 Switching time test circuit.
6-9
Embedded System
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