LM2576-12WT Ver la hoja de datos (PDF) - Micrel
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LM2576-12WT Datasheet PDF : 9 Pages
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LM2576
Absolute Maximum Ratings (Note 1)
Maximum Supply Voltage
ON/OFF Pin Input Voltage
Output Voltage to Ground (Steady State)
Power Dissipation
Storage Temperature Range
Minimum ESD Rating
C = 100pF, R = 1.5kΩ
FB Pin
Lead Temperature (soldering, 10 sec.)
Maximum Junction Temperature
45V
–0.3V ≤ V ≤ +40V
–1V
Internally Limited
–65°C to +150°C
2 kV
1 kV
260°C
150°C
Operating Ratings
Temperature Range
Supply Voltage
Micrel, Inc.
–40°C ≤ TJ ≤ +125°C
40V
Electrical Characteristics Specifications with standard typeface are for TJ = 25°C, and those with boldface type apply
over full Operating Temperature Range. Unless otherwise specified, VIN = 12V, and ILOAD = 500mA.
LM2576
Symbol Parameter
Conditions
Typ
Limit
(Note 2)
Units
(Limits)
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3) Test Circuit Figure 1
VOUT
Feedback Voltage
VIN = 12V , ILOAD = 0.5A
VOUT = 5V
1.230
1.217
1.243
V
V(min)
V(max)
VOUT
Feedback Voltage
LM2576
0.5A ≤ ILOAD ≤ 3A, 8V ≤ VIN ≤ 40V
VOUT = 5V
1.230
1.193/1.180
1.267/1.280
V
V(min)
V(max)
η
Efficiency
VIN = 12V, ILOAD = 3A, VOUT = 5V
82
%
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit Figure 1
VOUT
Output Voltage
VIN = 12V , ILOAD = 0.5A
VOUT = 3.3V
3.3
3.234
3.366
V
V(min)
V(max)
VOUT
Output Voltage
LM2576-3.3
0.5A ≤ ILOAD ≤ 3A, 6V ≤ VIN ≤ 40V
3.3
VOUT = 3.3V
3.168/3.135
3.432/3.465
V
V(min)
V(max)
η
Efficiency
VIN = 12V, ILOAD = 3A
75
%
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit Figure 1
VOUT
Output Voltage
VIN = 12V , ILOAD = 0.5A
VOUT = 5V
5.0
4.900
5.100
V
V(min)
V(max)
VOUT
Output Voltage
LM2576-5.0
0.5A ≤ ILOAD ≤ 3A, 8V ≤ VIN ≤ 40V
5.0
VOUT = 5V
4.800/4.750
5.200/5.250
V
V(min)
V(max)
η
Efficiency
VIN = 12V, ILOAD = 3A
82
%
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1
VOUT
Output Voltage
VIN = 25V , ILOAD = 0.5A
VOUT = 12V
12
11.760
12.240
V
V(min)
V(max)
VOUT
Output Voltage
LMLM2576-12
0.5A ≤ ILOAD ≤ 3A, 15V ≤ VIN ≤ 40V
12
VOUT = 12V
11.520/11.400
12.480/12.600
V
V(min)
V(max)
η
Efficiency
VIN = 25V, ILOAD = 3A
88
%
August 2005
3
M9999-082605-B
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