Micrel, Inc.
LM2575
Absolute Maximum Ratings
(1)
Maximum Supply Voltage (V
IN
) ......................................45V
ON/OFF Pin Input Voltage. ......................–0.3V
≤
V
≤
+40V
Output Voltage to Ground (Steady State) ......................–1V
Power Dissipation .....................................Internally Limited
Maximum Junction Temperature................................ 150°C
Lead Temperature (soldering, 10 sec.)...................... 260°C
Storage Temperature (T
s
) .........................–65°C to +150°C
Minimum ESD Rating
C = 100pF, R = 1.5kΩ.............................................. 2kV
FB Pin ...................................................................... 1kV
Operating Ratings
Supply Voltage (V
IN
).......................................................40V
Junction Temperature Range (T
J
).......–40°C
≤
T
J
≤
+125°C
Electrical Characteristics
Specifications with standard typeface are for T
J
= 25°C, and those with
boldface type
apply over full Operating
Temperature Range. Unless otherwise specified, V
IN
= 12V, and I
LOAD
= 200mA.
LM2575
Limit
(Note 2)
Units
(Limits)
Symbol
Parameter
Condition
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3)
Test Circuit Figure 1
Typ
Feedback Voltage
V
OUT
V
IN
= 12V , I
LOAD
= 0.2A
V
OUT
= 5V
0.2A
≤
I
LOAD
≤
1A, 8V
≤
V
IN
≤
40V
V
OUT
= 5V
1.230
1.217
1.243
1.230
1.193/
1.180
1.267/
1.280
82
3.3
3.234
3.366
3.3
3.168/
3.135
3.432/
3.465
75
5.0
4.900
5.100
5.0
4.800/
4.750
5.200/
5.250
82
12
11.760
12.240
12
11.520/
11.400
12.480/
12.600
88
Feedback Voltage LM2575
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A, V
OUT
= 5V
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3)
Test Circuit Figure 1
Output Voltage
V
OUT
V
IN
= 12V , I
LOAD
= 0.2A
V
OUT
= 3.3V
0.2A
≤
I
LOAD
≤
1A, 8V
≤
V
IN
≤
40V
V
OUT
= 3.3V
V
V(min)
V(max)
V
V(min)
V(max)
%
V
V(min)
V(max)
V
V(min)
V(max)
%
V
V(min)
V(max)
V
V(min)
V(max)
%
V
V(min)
V(max)
V
V(min)
V(max)
%
Output Voltage LM2575-3.3
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
SYSTEM PARAMETERS, 5V REGULATORS (Note 3)
Test Circuit Figure 1
Output Voltage
V
OUT
V
IN
= 12V , I
LOAD
= 0.2A
V
OUT
= 5V
0.2A
≤
I
LOAD
≤
1A, 8V
≤
V
IN
≤
40V
V
OUT
= 5V
Output Voltage LM2575-5.0
η
Efficiency
V
IN
= 12V, I
LOAD
= 1A
SYSTEM PARAMETERS, 12V REGULATORS (Note 3)
Test Circuit Figure 1
Output Voltage
V
OUT
V
IN
= 25V , I
LOAD
= 0.2A
V
OUT
= 12V
0.2A
≤
I
LOAD
≤
1A, 15V
≤
V
IN
≤
40V
V
OUT
= 12V
V
IN
= 25V, I
LOAD
= 1A
Output Voltage LM2575-12
η
Efficiency
May 2009
4
M9999-051209-B
MICREL [ MICREL SEMICONDUCTOR ]
