MIC5013_05 Datasheet, PDF (2/15 Pages) Micrel Semiconductor – Protected High- or Low-Side MOSFET Driver

MIC5013
Absolute Maximum Ratings (Note 1, 2)
Input Voltage, Pin 1
–10 to V⁺
Threshold Voltage, Pin 2
Sense Voltage, Pin 3
Source Voltage, Pin 4
–0.5 to +5V
–10V to V⁺
–10V to V⁺
Current into Pin 4
50mA
Gate Voltage, Pin 6
Supply Voltage (V⁺), Pin 7
–1V to 50V
–0.5V to 36V
Fault Output Current, Pin 8
–1mA to +1mA
Junction Temperature
150°C
Micrel, Inc.
Operating Ratings (Notes 1, 2)
Power Dissipation
θ_JA (Plastic DIP)
θ_JA (SOIC)
Ambient Temperature: B version
Storage Temperature
Lead Temperature
(Soldering, 10 seconds)
Supply Voltage (V⁺), Pin 7
1.25W
100°C/W
170°C/W
–40°C to +85°C
–65°C to +150°C
260°C
7V to 32V high side
7V to 15V low side
Pin Description (Refer to Figures 1 and 2)
Pin Number
Pin Name
1
Input
2
Threshold
3
Sense
4
Source
5
Ground
6
Gate
7
V⁺
8
Fault
Pin Function
Resets current sense latch and turns on power MOSFET when taken above
threshold (3.5V typical). Pin 1 requires <1µA to switch.
Sets current sense trip voltage according to:
V
= ²²⁰⁰
TRIP
R_TH + 1000
where R_TH to ground is 3.3k to 20kΩ. Adding capacitor C_TH increases the
trip voltage at turn-on to 2V. Use C_TH =10µF for a 10ms turn-on time con-
stant.
The sense pin causes the current sense to trip when V_SENSE is V_TRIP above
V_SOURCE. Pin 3 is used in conjunction with a current shunt in the source of
a 3 lead FET or a resistor R_S in the sense lead of a current sensing FET.
Reference for the current sense voltage on pin 3 and return for the gate
clamp zener. Connect to the load side of current shunt or kelvin lead of cur-
rent sensing FET. Pins 3 and 4 can safely swing to –10V when turning off
inductive loads.
Drives and clamps the gate of the power FET. Pin 6 will be clamped to ap-
proximately –0.7V by an internal diode when turning off inductive loads.
Supply pin; must be decoupled to isolate from large transients caused by
the power FET drain. 10µF is recommended close to pins 7 and 5.
Outputs status of protection circuit when pin 1 is high. Fault low indicates
normal operation; fault high indicates current sense tripped.
Pin Configuration
MIC5013
1 _{Input Fault} 8
2 _{Thresh V+} 7
3 _{Sense Gate} 6
4 _{Source Gnd} 5
MIC5013
2
July 2005