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LM2576-12BT 数据表(PDF) 3 Page - Micrel Semiconductor

部件名 LM2576-12BT
功能描述  52kHz Simple 3A Buck Voltage Regulator
Download  8 Pages
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制造商  MICREL [Micrel Semiconductor]
网页  http://www.micrel.com
标志 MICREL - Micrel Semiconductor

LM2576-12BT 数据表(HTML) 3 Page - Micrel Semiconductor

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4-122
October 1998
LM2576
Micrel
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 ILOAD = 500mA.
LM2576
Symbol
Parameter
Conditions
Typ
Limit
Units
(Note 2)
(Limits)
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3) Test Circuit
Figure 1
V
OUT
Feedback Voltage
V
IN = 12V , ILOAD = 0.5A
1.230
V
V
OUT = 5V
1.217
V(min)
1.243
V(max)
V
OUT
Feedback Voltage
0.5A
≤ I
LOAD ≤ 3A, 6V ≤ VIN ≤ 40V
1.230
V
LM2576
V
OUT = 5V
1.193/1.180
V(min)
1.267/1.280
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 3A, VOUT = 5V
82
%
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit
Figure 1
V
OUT
Output Voltage
V
IN = 12V , ILOAD = 0.5A
3.3
V
V
OUT = 3.3V
3.234
V(min)
3.366
V(max)
V
OUT
Output Voltage
0.5A
≤ I
LOAD ≤ 3A, 6V ≤ VIN ≤ 40V
3.3
V
LM2576-3.3
V
OUT = 3.3V
3.168/3.135
V(min)
3.432/3.465
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 3A
75
%
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit
Figure 1
V
OUT
Output Voltage
V
IN = 12V , ILOAD = 0.5A
5.0
V
V
OUT = 5V
4.900
V(min)
5.100
V(max)
V
OUT
Output Voltage
0.5A
≤ I
LOAD ≤ 3A, 8V ≤ VIN ≤ 40V
5.0
V
LM2576-5.0
V
OUT = 5V
4.800/4.750
V(min)
5.200/5.250
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 3A
82
%
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit
Figure 1
V
OUT
Output Voltage
V
IN = 25V , ILOAD = 0.5A
12
V
V
OUT = 12V
11.760
V(min)
12.240
V(max)
V
OUT
Output Voltage
0.5A
≤ I
LOAD ≤ 3A, 15V ≤ VIN ≤ 40V
12
V
LMLM2576-12
V
OUT = 12V
11.520/11.400
V(min)
12.480/12.600
V(max)
η
Efficiency
V
IN = 25V, ILOAD = 3A
88
%
Absolute Maximum Ratings (Note 1)
Maximum Supply Voltage
45V
ON/OFF Pin Input Voltage
–0.3V
≤ V ≤ +40V
Output Voltage to Ground (Steady State)
–1V
Power Dissipation
Internally Limited
Storage Temperature Range
–65
°C to +150°C
Minimum ESD Rating
C = 100pF, R = 1.5k
2 kV
FB Pin
1 kV
Lead Temperature (soldering, 10 sec.)
260
°C
Maximum Junction Temperature
150
°C
Operating Ratings
Temperature Range
–40
°C ≤ T
J ≤ +125°C
Supply Voltage
40V


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