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LM2575BT Datenblatt(PDF) 3 Page - Micrel Semiconductor

Teilenummer LM2575BT
Bauteilbeschribung  52kHz Simple 1A Buck Regulator
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Hersteller  MICREL [Micrel Semiconductor]
Direct Link  http://www.micrel.com
Logo MICREL - Micrel Semiconductor

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April 2005
3
M9999-042205
LM2575
Micrel, Inc.
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 = 200mA.
LM2575
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 = 0.2A
1.230
V
V
OUT = 5V
1.217
V(min)
1.243
V(max)
V
OUT
Feedback Voltage
0.2A ≤ ILOAD ≤ 1A, 8V ≤ VIN ≤ 40V
1.230
V
LM2575
V
OUT = 5V
1.193/1.180
V(min)
1.267/1.280
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 1A, VOUT = 5V
82
%
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit Figure 1
V
OUT
Output Voltage
V
IN = 12V , ILOAD = 0.2A
3.3
V
V
OUT = 3.3V
3.234
V(min)
3.366
V(max)
V
OUT
Output Voltage
0.2A ≤ ILOAD ≤ 1A, 8V ≤ VIN ≤ 40V
3.3
V
LM2575-3.3
V
OUT = 3.3V
3.168/3.135
V(min)
3.432/3.465
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 1A
75
%
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit Figure 1
V
OUT
Output Voltage
V
IN = 12V , ILOAD = 0.2A
5.0
V
V
OUT = 5V
4.900
V(min)
5.100
V(max)
V
OUT
Output Voltage
0.2A ≤ ILOAD ≤ 1A, 8V ≤ VIN ≤ 40V
5.0
V
LM2575-5.0
V
OUT = 5V
4.800/4.750
V(min)
5.200/5.250
V(max)
η
Efficiency
V
IN = 12V, ILOAD = 1A
82
%
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1
V
OUT
Output Voltage
V
IN = 25V , ILOAD = 0.2A
12
V
V
OUT = 12V
11.760
V(min)
12.240
V(max)
V
OUT
Output Voltage
0.2A ≤ ILOAD ≤ 1A, 15V ≤ VIN ≤ 40V
12
V
LM2575-12
V
OUT = 12V
11.520/11.400
V(min)
12.480/12.600
V(max)
η
Efficiency
V
IN = 25V, ILOAD = 1A
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 = 1.5kΩ
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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