MIC4575_09 Datasheet, PDF (3/15 Pages) Micrel Semiconductor – 200kHz Simple 1A Buck Regulator

Micrel, Inc.
MIC4575
Absolute Maximum Ratings
Supply Voltage (V_IN)⁽¹⁾ ..................................................+40V
Shutdown Voltage (V_SHDN)............................. –0.3V to +36V
Output Switch (V_SW) .......................................................–1V
Storage Temperature (T_s) ........................... –65°C to 150°C
ESD⁽²⁾
Operating Ratings
Supply Voltage (V_IN).....................................................+24V
Junction Temperature (T_J) ....................................... +150°C
Package Thermal Resistance
TO-220, TO-263 (θ_JA) ........................................65°C/W
TO-220, TO-263 (θ_JC) ..........................................2°C/W
Electrical Characteristics⁽⁴⁾
V_IN = 12V; I_LOAD = 200mA; T_J = 25°C, bold values indicate –40°C< T_J < +85°C, unless noted.
Parameter
Condition
Min
MIC4575 [Adjustable]
Feedback Voltage
1.217
Feedback Voltage
8V ≤ V_IN ≤ 24V, 0.2A ≤ I_LOAD ≤ 1A
1.193
1.180
Efficiency
I_LOAD = 1A, V_OUT = 5V
Feedback Bias Current
Typ
1.230
1.230
77
50
MIC4575-3.3
Output Voltage
Output Voltage
Efficiency
MIC4575-5.0
Output Voltage
Output Voltage
Efficiency
MIC4575 / -3.3 / -5.0
Oscillator Frequency
Saturation Voltage
6V ≤ V_IN ≤ 24V, 0.2A ≤ I_LOAD ≤ 1A
I_LOAD = 1A
8V ≤ V_IN ≤ 24V, 0.2A ≤ I_LOAD ≤ 1A
I_LOAD = 1A
I_OUT = 1A
3.234 3.3
3.168 3.3
3.135
72
4.900 5.0
4.800 5.0
4.750
77
180 200
1
Maximum Duty Cycle (On)
Current Limit
FB connected to 0V
Peak Current, t_ON ≤ 3µs
Output Leakage Current
Quiescent Current
Standby Quiescent Current
SHDN Input Logic Level
V_IN = 24V, FB connected to 0V
Output = 0V
Output = –1V
SHDN = 5V (regulator off)
V_OUT = 0V (regulator off)
SHDN Input Current
V_OUT = 3.3 or 5V (regulator on)
90
95
1.7
2.2
1.3
0
7.5
5
50
2.2
1.4
2.4
1.2
SHDN = 5V (regulator off)
SHDN = 0V (regulator on)
Notes:
1. The MIC4575 is not guaranteed to survive a short circuit to ground for input voltage above 24V.
2. Devices are ESD sensitive. Handling precautions recommended.
4
–10 0.01
Max
1.243
1.267
1.280
100
500
3.366
3.432
3.465
5.100
5.200
5.250
220
1.3
1.5
3.0
3.2
2
35
10
200
1.0
0.8
30
10
Units
V
V
V
%
nA
nA
V
V
V
%
V
V
V
%
kHz
V
V
%
A
A
mA
mA
mA
µA
V
V
V
V
µA
µA
July 2009
3
M9999-072909