MIC5020 Datasheet, PDF (3/7 Pages) Micrel Semiconductor – Current-Sensing Low-Side MOSFET Driver

MIC5020
Absolute Maximum Ratings
Supply Voltage (V_DD) .................................................. +55V
Input Voltage ................................................ –0.5V to +15V
Sense Differential Voltage .......................................... ±6.5V
Sense + or Sense – to Gnd .......................... –0.5V to +50V
Fault Voltage ............................................................... +50V
Current into Fault ....................................................... 50mA
Timer Voltage (C_T) ..................................................... +5.5V
Micrel
Operating Ratings
Supply Voltage (V_DD) .................................... +11V to +50V
Temperature Range
SOIC ...................................................... –40°C to +85°C
Plastic DIP .............................................. –40°C to +85°C
Electrical Characteristics
T_A = 25°C, Gnd = 0V, V_DD = 12V, Sense +,– = 0V, Fault = Open, C_T = Open, Gate C_L = 1500pF unless otherwise specificed
Symbol Parameter
Condition
Min Typ Max
Units
D.C. Supply Current
Input Threshold
V_DD = 12V, Input = 0V
V_DD = 50V, Input = 0V
V_DD = 12V, Input = 5V
V_DD = 50V, Input = 5V
0.8
2
mA
2
10
mA
0.8
2
mA
4
25
mA
0.8
1.4
2.0
V
Input Hysteresis
0.1
V
Input Pull-Down Current
Input = 5V
10
20
40
µA
Fault Output
Saturation Voltage
Fault Current = 1.6mA
Note 1
0.15 0.4
V
Fault Output Leakage
Fault = 50V
–1 0.01 +1
µA
Current Limit Threshold
Note 2
30
50
70
mV
t_G(ON)
t_G(OFF)
t_DLH
t_R
t_DLH
t_F
f_max
Gate On Voltage
Gate On Time, Fixed
Gate Off Time, Adjustable
Gate Turn-On Delay
Gate Rise Time
Gate Turn-Off Delay
Gate Fall Time
Maximum Operating Frequency
V_DD = 12V
V_DD = 50V
Sense Differential > 70mV
Sense Differential > 70mV, C_T = 0pF
Note 3
Note 4
Note 5
Note 6
Note 7
10
11
V
14
15
18
V
2
5
10
µs
10
20
50
µs
400 800
ns
700 1500 ns
900 1500 ns
500 1500 ns
100 150
kHz
Note 1
Note 2
Note 3
Note 4
Note 5
Note 6
Note 7
Voltage remains low for time affected by C_T.
When using sense MOSFETs, it is recommended that R_SENSE < 50Ω. Higher values may affect the sense MOSFET’s current transfer ratio.
Input switched from 0.8V (TTL low) to 2.0V (TTL high), time for Gate transition from 0V to 2V.
Input switched from 0.8V (TTL low) to 2.0V (TTL high), time for Gate transition from 2V to 10V.
Input switched from 2.0V (TTL high) to 0.8V (TTL low), time for Gate transition from 11V (Gate ON voltage) to 10V.
Input switched from 2.0V (TTL high) to 0.8V (TTL low), time for Gate transition from 10V from 2V.
Frequency where gate on voltage reduces to 10V with 50% input duty cycle.
5-164
October 1998