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参数资料
| 型号： | LM2574YN |
| 厂商： | Micrel Inc |
| 文件页数： | 3/8页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 0.5A 8DIP |
| 标准包装： | 50 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.23 V ~ 37 V |
| 输入电压： | 4.75 V ~ 40 V |
| 频率 - 开关： | 52kHz |
| 电流 - 输出： | 500mA |
| 同步整流器： | 无 |
| 工作温度： | -40°C ~ 85°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 |
| 产品目录页面： | 1091 (CN2011-ZH PDF) |
| 其它名称： | 576-1515-5 LM2574YN-ND |
LM2574
Absolute Maximum Ratings (1)
Maximum Supply Voltage
LM2574 ...................................................................... 45V
OFF Pin Input Voltage ................................ –0.3V ≤ V ≤ V IN
Output Voltage to Ground (Steady State) ...................... –1V
Power Dissipation ..................................... Internally Limited
Storage Temperature Range (T S ) ............. –65°C to +150°C
Minimum ESD Rating
Micrel, Inc.
Operating Ratings (1)
Supply Voltage
LM2574 ...................................................................... 40V
Temperature Range
LM2574 ........................................... –40°C ≤ T J ≤ +125°C
Maximum Junction Temperature (T J .......................... 150°C
C = 100pF, R = 1.5kΩ ................................................ 2kV
FB Pin ........................................................................ 1kV
Lead Temperature (soldering, 10 sec.) ...................... 260°C
Electrical Characteristics (2)
Speci?cations with standard typeface are for T J = 25°C, and those with boldface type apply over full Operating Temperature Range.
Unless otherwise speci?ed, V IN = 12V, and I LOAD = 100mA.
Symbol Parameter Condition Min Typ Max Units
System Parameters, Adjustable
Regulators (3) ,
Test Circuit Figure 2
V OUT Feedback Voltage
V OUT Feedback Voltage
(LM2574)
η Ef?ciency
System Parameters, 3.3V Regulators (3) ,
V IN = 12V, I LOAD = 0.1A, V OUT = 5V
0.1A ≤ I LOAD ≤ 0.5A, 7V≤ V IN ≤ 40V,
V OUT = 5V
V IN = 12V, I LOAD = 0.1A, V OUT = 5V
Test Circuit Figure 3
1.217
1.193
1.180
1.230
1.230
78
1.243
1.267
1.280
V
V
V
%
V OUT Output Voltage V IN = 12V, I LOAD = 0.1A, V OUT = 3.3V
V OUT Output Voltage 0.1A ≤ I LOAD ≤ 0.5A, 4.75V ≤ V IN ≤ 40V,
(LM2574-3.3) V OUT = 3.3V
η Ef?ciency V IN = 12V, I LOAD = 0.1A
System Parameters, 5V Regulators (3) , Test Circuit Figure 3
3.234
3.168
3.135
3.3
3.3
73
3.366
3.432
3.465
V
V
V
%
V OUT
V OUT
η
Output Voltage
Output Voltage
(LM2574-5.0)
Ef?ciency
V IN = 12V, I LOAD = 0.1A, V OUT = 5V
0.1A ≤ I LOAD ≤ 0.5A, 7V≤ V IN ≤ 40V,
V OUT = 5V
V IN = 12V, I LOAD = 0.1A, V OUT = 5V
4.900
4.800
4.750
5.0
5.0
78
5.100
5.200
5.250
V
V
V
%
Notes:
1. “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur. “Operating Ratings” indicate for which the device is
intended to be functional, but do not guarantee speci?c performance limits. For guaranteed speci?cations and test conditions, see “Electrical Charac-
teristics.”
2. All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
production tested. All limits at temperature extremes are guaranteed via testing.
3. External components such as the catch diode, inductor, input and output capacitors can affect switching regulator system performance.
When the LM2574 is used as shown in Figure 1 test circuit, system performance will be shown in system parameters section of “Electrical Charac-
teristics.”
July 2005
3
M9999-072805
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相关代理商/技术参数 |
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| LM2575_05 | 制造商:ONSEMI 制造商全称:ON Semiconductor 功能描述:1.0 A, Adjustable Output Voltage, Step−Down Switching Regulator |
| LM2575_06 | 制造商:TI 制造商全称:Texas Instruments 功能描述:1-A SIMPLE STEP-DOWN SWITCHING VOLTAGE REGULATOR |
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