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参数资料
| 型号： | LM2575-12MDC |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, UUC |
| 封装： | DIE |
| 文件页数： | 28/40页 |
| 文件大小： | 917K |
| 代理商： | LM2575-12MDC |
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National P/N LM1575 - SIMPLE SWITCHER 1A Step-Down Voltage Regulator
The LM2575 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, 12V, 15V, and an adjustable output version.
Requiring a minimum number of external components, these regulators are simple to use and include
internal frequency compensation and a fixed-frequency oscillator.
The LM2575 series offers a high-efficiency replacement for popular three-terminal linear regulators. It
substantially reduces the size of the heat sink, and in many cases no heat sink is required.
A standard series of inductors optimized for use with the LM2575 are available from several different
manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a guaranteed ±4% tolerance on output voltage within specified input voltages and
output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50 A
(typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal
shutdown for full protection under fault conditions.
Features
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3.3V, 5V, 12V, 15V, and adjustable output versions
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Adjustable version output voltage range, 1.23V to 37V (57V for HV version) ±4% max over line and
load conditions
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Guaranteed 1A output current
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Wide input voltage range, 40V up to 60V for HV version
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Requires only 4 external components
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52 kHz fixed frequency internal oscillator
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TTL shutdown capability, low power standby mode
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High efficiency
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Uses readily available standard inductors
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Thermal shutdown and current limit protection
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P+ Product Enhancement tested
Applications
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Simple high-efficiency step-down (buck) regulator
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Efficient pre-regualtor for linear regulators
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On-card switching regulators
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Positive to negative converter (Buck-Boost)
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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[Information as of 5-Aug-2002]
file:///H|/imaging/BITTING/cpl/20020808_1/08062002_10/NATL/08062002_HTML/LM1575.html (3 of 4) [Aug-09-2002 12:18:46 PM]
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2575-12T | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Easy Switcher 1.0 A Step-Down Voltage Regulator(389.50 k) |
| LM2575-12TA5R | 制造商:FCI 制造商全称:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
| LM2575-12TA5T | 制造商:FCI 制造商全称:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
| LM2575-12TB5BT | 制造商:FCI 制造商全称:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
| LM2575-12TB5T | 制造商:FCI 制造商全称:First Components International 功能描述:1.0A Step - Down Voltage Switching Regulators 1A output current |
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