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参数资料
| 型号： | LM2575-12BUT&R |
| 厂商： | MICREL INC |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| 封装： | TO-263, 5 PIN |
| 文件页数： | 7/12页 |
| 文件大小： | 152K |
| 代理商： | LM2575-12BUT&R |
Micrel, Inc.
LM2575
May 2009
4
M9999-051209-B
Absolute Maximum Ratings
(1)
Maximum Supply Voltage (VIN) ......................................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 (Ts) .........................–65°C to +150°C
Minimum ESD Rating
C = 100pF, R = 1.5k.............................................. 2kV
FB Pin ...................................................................... 1kV
Operating Ratings
Supply Voltage (VIN).......................................................40V
Junction Temperature Range (TJ).......–40°C ≤ TJ ≤ +125°C
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 = 200mA.
Symbol
Parameter
Condition
Typ
LM2575
Limit
(Note 2)
Units
(Limits)
SYSTEM PARAMETERS, ADJUSTABLE REGULATORS (Note 3) Test Circuit Figure 1
Feedback Voltage
VIN = 12V , ILOAD = 0.2A
VOUT = 5V
1.230
1.217
1.243
V
V(min)
V(max)
VOUT
Feedback Voltage LM2575
0.2A ≤ ILOAD ≤ 1A, 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 = 1A, VOUT = 5V
82
%
SYSTEM PARAMETERS, 3.3V REGULATORS (Note 3) Test Circuit Figure 1
Output Voltage
VIN = 12V , ILOAD = 0.2A
VOUT = 3.3V
3.3
3.234
3.366
V
V(min)
V(max)
VOUT
Output Voltage LM2575-3.3
0.2A ≤ ILOAD ≤ 1A, 8V ≤ VIN ≤ 40V
VOUT = 3.3V
3.3
3.168/3.135
3.432/3.465
V
V(min)
V(max)
η
Efficiency
VIN = 12V, ILOAD = 1A
75
%
SYSTEM PARAMETERS, 5V REGULATORS (Note 3) Test Circuit Figure 1
Output Voltage
VIN = 12V , ILOAD = 0.2A
VOUT = 5V
5.0
4.900
5.100
V
V(min)
V(max)
VOUT
Output Voltage LM2575-5.0
0.2A ≤ ILOAD ≤ 1A, 8V ≤ VIN ≤ 40V
VOUT = 5V
5.0
4.800/4.750
5.200/5.250
V
V(min)
V(max)
η
Efficiency
VIN = 12V, ILOAD = 1A
82
%
SYSTEM PARAMETERS, 12V REGULATORS (Note 3) Test Circuit Figure 1
Output Voltage
VIN = 25V , ILOAD = 0.2A
VOUT = 12V
12
11.760
12.240
V
V(min)
V(max)
VOUT
Output Voltage LM2575-12
0.2A ≤ ILOAD ≤ 1A, 15V ≤ VIN ≤ 40V
VOUT = 12V
12
11.520/11.400
12.480/12.600
V
V(min)
V(max)
η
Efficiency
VIN = 25V, ILOAD = 1A
88
%
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