MIC4576 Datasheet, PDF (3/7 Pages) Micrel Semiconductor – 200kHz Simple 3A Buck Voltage Regulator

MIC4576
Absolute Maximum Ratings
Supply Voltage (V_IN) ................................................... +40V
Shutdown Voltage (V_SHDN) .......................... –0.3V to +36V
Output Switch (V_SW), Steady State ............................... –1V
Feedback Voltage (V_FB) [Adjustable] ......................... +3.8V
Storage Temperature ............................... –65°C to +150°C
Micrel
Operating Ratings
Supply Voltage (V_IN) ................................................... +36V
Junction Temperature ............................................. +150°C
Package Thermal Resistance
TO-220, TO-263 (θ_JA) ......................................... 65°C/W
TO-220, TO-263 (θ_JA) ........................................... 2°C/W
Electrical Characteristics
V_IN = 12V; I_LOAD = 500mA; T_J = 25°C, bold values indicate –40°C ≤ T_J ≤ +85°C; unless noted.
Parameter
Condition
MIC4576 [Adjustable]
Feedback Voltage
Feedback Voltage
8V ≤ V_IN ≤ 36V, 0.5A ≤ I_LOAD ≤ 3A
Efficiency
Maximum Duty Cycle (On)
Output Leakage Current
Quiescent Current
Feedback Bias Current
I_LOAD = 3A, Note 1
V_FB = 1.0V
V_IN = 36V, V_FB = 1.5V
output = 0V
output = –1V
V_FB = 1.5V
MIC4576-3.3
Output Voltage
Output Voltage
Efficiency
Maximum Duty Cycle (On)
Output Leakage Current
Quiescent Current
MIC4576-5.0
Output Voltage
Output Voltage
Efficiency
Maximum Duty Cycle (On)
Output Leakage Current
Quiescent Current
6V ≤ V_IN ≤ 36V, 0.5A ≤ I_LOAD ≤ 3A
I_LOAD = 3A
V_FB = 2.5V
V_IN = 36V, V_FB = 4.0V
output = 0V
output = –1V
V_FB = 4.0V
8V ≤ V_IN ≤ 36V, 0.5A ≤ I_LOAD ≤ 3A
I_LOAD = 3A
V_FB = 4.0V
V_IN = 36V, V_FB = 6.0V
output = 0V
output = –1V
V_FB = 6.0V
Min Typ Max Units
1.217 1.230 1.243 V
1.193 1.230 1.267 V
1.180
1.280 V
77
%
90
95
%
0
2
mA
7.5
30
mA
5
10
mA
50
100
nA
500 nA
3.234 3.3 3.366 V
3.168 3.3 3.432 V
3.135
3.465 V
72
%
90
95
%
0
2
mA
7.5
30
mA
5
10
mA
4.900 5.0 5.100 V
4.800 5.0 5.200 V
4.750
5.250 V
77
%
90
95
%
0
2
mA
7.5
30
mA
5
10
mA
MIC4576
4-130
April 1998•