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| 型号： | LM2574N-012 |
| 厂商： | ON Semiconductor |
| 文件页数： | 3/26页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK 12V 0.5A 8DIP |
| 产品变化通告： | Product Discontinuation 27/Jun/2007 |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 固定 |
| 输出数： | 1 |
| 输出电压： | 12V |
| 输入电压： | 4.75 V ~ 40 V |
| PWM 型： | 电压模式 |
| 频率 - 开关： | 52kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP（0.300"，7.62mm） |
| 包装： | 管件 |
| 供应商设备封装： | 8-PDIP |
LM2574, NCV2574
OPERATING RATINGS (Operating Ratings indicate conditions for which the device is intended to be functional, but do not guarantee
specific performance limits. For guaranteed specifications and test conditions, see the Electrical Characteristics).
Rating
Operating Junction Temperature Range
Supply Voltage
Symbol
T J
V in
Value
?40 to +125
40
Unit
° C
V
SYSTEM PARAMETERS ([Note 1] Test Circuit Figure 16)
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, V in = 12 V for the 3.3 V, 5.0 V, and Adjustable
version, V in = 25 V for the 12 V version, V in = 30 V for the 15 V version. I Load = 100 mA. For typical values T J = 25 ° C, for min/max values
T J is the operating junction temperature range that applies [Note 2], unless otherwise noted).
Characteristic
Symbol
Min
Typ
Max
Unit
LM2574?3.3 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 12 V, I Load = 100 mA, T J = 25 ° C)
Output Voltage (4.75 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A)
T J = 25 ° C
T J = ?40 to +125 ° C
Efficiency (V in = 12 V, I Load = 0.5 A)
V out
V out
η
3.234
3.168
3.135
?
3.3
3.3
?
72
3.366
3.432
3.465
?
V
V
%
LM2574?5 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 12 V, I Load = 100 mA, T J = 25 ° C)
V out
4.9
5.0
5.1
V
Output Voltage (7.0 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A)
V out
V
T J = 25 ° C
T J = ?40 to +125 ° C
4.8
4.75
5.0
5.2
5.25
Efficiency (V in = 12 V, I Load = 0.5 A)
η
?
77
?
%
LM2574?12 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 25 V, I Load = 100 mA, T J = 25 ° C)
V out
11.76
10
12.24
V
Output Voltage (15 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A)
V out
V
T J = 25 ° C
T J = ?40 to +125 ° C
11.52
11.4
12
?
12.48
12.6
Efficiency (V in = 15 V, I Load = 0.5 A)
η
?
88
?
%
LM2574?15 ([Note 1] Test Circuit Figure 16)
Output Voltage (V in = 30 V, I Load = 100 mA, T J = 25 ° C)
Output Voltage (18 V < V in < 40 V, 0.1 A < I Load < 0.5 A)
T J = 25 ° C
T J = ?40 to +125 ° C
Efficiency (V in = 18 V, I Load = 0.5 A)
V out
V out
η
14.7
14.4
14.25
?
15
15
88
15.3
15.6
15.75
?
V
V
%
LM2574 ADJUSTABLE VERSION ([Note 1] Test Circuit Figure 16)
Feedback Voltage V in = 12 V, I Load = 100 mA, V out = 5.0 V, T J = 25 ° C
V FB
1.217
1.23
1.243
V
Feedback Voltage 7.0 V ≤ V in ≤ 40 V, 0.1 A ≤ I Load ≤ 0.5 A, V out = 5.0
V
V FBT
V
T J = 25 ° C
T J = ?40 to +125 ° C
1.193
1.18
1.23
1.267
1.28
Efficiency (V in = 12 V, I Load = 0.5 A, V out = 5.0 V)
η
?
77
?
%
1. External components such as the catch diode, inductor, input and output capacitors can affect the switching regulator system performance.
When the LM2574 is used as shown in the Figure 16 test circuit, the system performance will be as shown in the system parameters section
of the Electrical Characteristics.
2. Tested junction temperature range for the LM2574, NCV2574: T low = ?40 ° C T high = +125 ° C.
http://onsemi.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2574N-012G | 功能描述:直流/直流开关转换器 12V 500mA Buck PWM RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2574N-015 | 功能描述:直流/直流开关调节器 15V 500mA Buck PWM RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM2574N-015G | 功能描述:直流/直流开关调节器 15V 500mA Buck PWM RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM2574N-12 | 功能描述:直流/直流开关转换器 RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT |
| LM2574N-12 NOPB | 制造商:National Semiconductor 功能描述:Conv DC-DC Single Step Down 4V to 40V 8-Pin PDIP Rail |
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