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参数资料
| 型号： | LM2591HV3.3MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 173 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 15/23页 |
| 文件大小： | 722K |
| 代理商： | LM2591HV3.3MDC |
National P/N LM2591HV - SIMPLE SWITCHER Power Converter 150 kHz 1A Step-Down Voltage Regulator
The LM2591HV series of regulators are monolithic integrated circuits that provide all the active functions for
a step-down (buck) switching regulator, capable of driving a 1A load with excellent line and load regulation.
These devices are available in fixed output voltages of 3.3V, 5V, and an adjustable output version.
This series of switching regulators is similar to the LM2590HV, but without some of the supervisory and
performance features of the latter.
Requiring a minimum number of external components, these regulators are simple to use and include
internal frequency compensation, improved line and load specifications and a fixed-frequency oscillator.
The LM2591HV operates at a switching frequency of 150 kHz thus allowing smaller sized filter components
than what would be needed with lower frequency switching regulators. Available in a standard 5-lead TO-220
package with several different lead bend options, and a 5-lead TO-263 Surface mount package.
Other features include a guaranteed ±4% tolerance on output voltage under all conditions of input voltage
and output load conditions, and ±15% on the oscillator frequency. External shutdown is included, featuring
typically 90 A standby current. Self protection features include a two stage current limit for the output
switch and an over temperature shutdown for complete protection under fault conditions.
Features
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3.3V, 5V, and adjustable output versions
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Adjustable version output voltage range, 1.2V to 57V ±4% max over line and load conditions
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Guaranteed 1A output load current
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Available in 5-pin TO-220 and TO-263 (surface mount) Package
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Input voltage range up to 60V
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150 kHz fixed frequency internal oscillator
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On/Off control
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Low power standby mode, IQ typically 90 A
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High Efficiency
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Thermal shutdown and current limit protection
Applications
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Simple high-efficiency step-down (buck) regulator
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Efficient pre-regulator for linear regulators
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On-card switching regulators
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Positive to Negative converter
Design Tools
Title
Size in Kbytes Date
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SimpleSwitcher DC-DC
Converters Design Software
10 Kbytes
12-Jun-
2002
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Application Notes
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM2591HV.html (3 of 4) [Aug-09-2002 2:10:59 PM]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2591HVS-3.3 | 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 |
| LM2591HVS-3.3/NOPB | 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 |
| LM2591HVS-5.0 | 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 |
| LM2591HVS-5.0/NOPB | 功能描述:直流/直流开关转换器 PWR CONVERTER 150KHz 1A ST-DOWN VLTG REG 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 |
| LM2591HVS-5.0/NOPB | 制造商:Texas Instruments 功能描述:DC/DC Converter (DC-DC) / Switching Regu |
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