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MIC4575 Datasheet(PDF) 3 Page - Micrel Semiconductor

Part No. MIC4575
Description  200kHz Simple 1A Buck Voltage Regulator
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Maker  MICREL [Micrel Semiconductor]
Homepage  http://www.micrel.com
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MIC4575 Datasheet(HTML) 3 Page - Micrel Semiconductor

 
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MIC4575
Micrel
4-108
April 1998•
Electrical Characteristics
V
IN = 12V; ILOAD = 200mA; TJ = 25°C, bold values indicate –40°C ≤ TJ ≤ +85°C; unless noted.
Parameter
Condition
Min
Typ
Max
Units
MIC4575 [Adjustable]
Feedback Voltage
1.217
1.230
1.243
V
Feedback Voltage
8V
≤ V
IN ≤ 24V, 0.2A ≤ ILOAD ≤ 1A
1.193
1.230
1.267
V
1.180
1.280
V
Efficiency
I
LOAD = 1A, VOUT = 5V
77
%
Feedback Bias Current
50
100
nA
500
nA
MIC4575-3.3
Output Voltage
3.234
3.3
3.366
V
Output Voltage
6V
≤ V
IN ≤ 24V, 0.2A ≤ ILOAD ≤ 1A
3.168
3.3
3.432
V
3.135
3.465
V
Efficiency
I
LOAD = 1A
72
%
MIC4575-5.0
Output Voltage
4.900
5.0
5.100
V
Output Voltage
8V
≤ V
IN ≤ 24V, 0.2A ≤ ILOAD ≤ 1A
4.800
5.0
5.200
V
4.750
5.250
V
Efficiency
I
LOAD = 1A
77
%
MIC4575 / -3.3 / -5.0
Oscillator Frequency
180
200
220
kHz
Saturation Voltage
I
OUT = 1A
1
1.3
V
1.5
V
Maximum Duty Cycle (On)
FB connected to 0V
90
95
%
Current Limit
Peak Current, t
ON ≤ 3µs
1.7
2.2
3.0
A
1.3
3.2
A
Output Leakage Current
V
IN = 24V, FB connected to 0V
Output = 0V
0
2
mA
Output = –1V
7.5
30
mA
Quiescent Current
510
mA
Standby Quiescent Current
SHDN = 5V (regulator off)
50
200
µA
SHDN Input Logic Level
V
OUT = 0V (regulator off)
2.2
1.4
V
2.4
V
V
OUT = 3.3 or 5V (regulator on)
1.2
1.0
V
0.8
V
SHDN Input Current
SHDN = 5V (regulator off)
4
30
µA
SHDN = 0V (regulator on)
–10
0.01
10
µA
General Note: Devices are ESD protected, however, handling precautions are recommended.
Note 1:
The MIC4575 is not guaranteed to survive a short circuit to ground for input voltage above 24V.
Absolute Maximum Ratings
Supply Voltage (V
IN) Note 1 ....................................... +40V
Shutdown Voltage (V
SHDN) .......................... –0.3V to +36V
Output Switch (V
SW) steady state ................................. –1V
Storage Temperature (T
S) ......................... –65°C to 150°C
Operating Ratings
Supply Voltage (V
IN) ................................................... +24V
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


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