MIC5010 Datasheet, PDF (2/16 Pages) Micrel Semiconductor – Full-Featured High- or Low-Side MOSFET Driver

MIC5010
Absolute Maximum Ratings (Note 1, 2)
Inhibit Voltage, Pin 1
Input Voltage, Pin 3
Threshold Voltage, Pin 4
Sense Voltage, Pin 5
Source Voltage, Pin 6
Current into Pin 6
Gate Voltage, Pin 8
Supply Voltage (V⁺), Pin 13
Fault Output Current, Pin 14
Junction Temperature
–1V to V+
–10V to V+
– 0.5 to +5V
–10V to V+
–10V to V+
50 mA
–1V to 50V
–0.5V to 36V
–1mA to +1mA
150°C
Micrel
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 13
1.56W
80 °C/W
115°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
1
3
4
5
6
7
8
9, 10, 11
13
14
Pin Name
Inhibit
Input
Threshold
Sense
Source
Ground
Gate
C2, Com, C1
V⁺
Fault
Pin Function
Inhibits current sense function when connected to supply. Normally
grounded.
Resets current sense latch and turns on power MOSFET when taken above
threshold (3.5V typical). Pin 3 requires <1µA to switch.
Sets current sense trip voltage according to:
V_TRIP
=
2200
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
constant.
The sense pin causes the current sense to trip when V_SENSE is V_TRIP above
V_SOURCE. Pin 5 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 5 and return for the gate
clamp zener. Connect to the load side of current shunt or kelvin lead of
current sensing FET. Pins 5 and 6 can safely swing to –10V when turning
off inductive loads.
Drives and clamps the gate of the power FET. Pin 8 will be clamped to
approximately –0.7V by an internal diode when turning off inductive loads.
Optional 1nF capacitors reduce gate turn-on time; C2 has dominant effect.
Supply pin; must be decoupled to isolate from large transients caused by
the power FET drain. 10µF is recommended close to pins 13 and 7.
Outputs status of protection circuit when pin 3 is high. Fault low indicates
normal operation; fault high indicates current sense tripped.
Pin Configuration
MIC5010
1
14
Inhibit Fault
2
NC
3
Input
4
Thresh
13
V+
12
NC
11
C1
5
10
Sense Com
6
Source
C2 ⁹
7
Gnd
Gate ⁸
5-88
April 1998