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參數資料
| 型號： | LM2575HVT-5.0LB03 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PZFM5 |
| 封裝： | TO-220, 5 PIN |
| 文件頁數： | 1/7頁 |
| 文件大小： | 856K |
| 代理商： | LM2575HVT-5.0LB03 |
April 2007
LM1575/LM2575/LM2575HV
SIMPLE SWITCHER 1A Step-Down Voltage Regulator
General Description
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 avail-
able 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 re-
duces 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 pow-
er supplies.
Other features include a guaranteed ±4% tolerance on output
voltage within specified input voltages and output load con-
ditions, and ±10% on the oscillator frequency. External shut-
down is included, featuring 50
μA (typical) standby current.
The output switch includes cycle-by-cycle current limiting, as
well as thermal shutdown for full protection under fault con-
ditions.
Features
■ 3.3V, 5V, 12V, 15V, and adjustable output versions
■ Adjustable version output voltage range,
1.23V to 37V (57V for HV version) ±4% max over
line and load conditions
■ Guaranteed 1A output current
■ Wide input voltage range, 40V up to 60V for HV version
■ Requires only 4 external components
■ 52 kHz fixed frequency internal oscillator
■ TTL shutdown capability, low power standby mode
■ High efficiency
■ Uses readily available standard inductors
■ Thermal shutdown and current limit protection
■ P+ Product Enhancement tested
Applications
■ Simple high-efficiency step-down (buck) regulator
■ Efficient pre-regulator for linear regulators
■ On-card switching regulators
■ Positive to negative converter (Buck-Boost)
Typical Application
(Fixed Output Voltage Versions)
1147501
Note:
Pin numbers are for the TO-220 package.
SIMPLE SWITCHER is a registered trademark of National Semiconductor Corporation
2007 National Semiconductor Corporation
11475
www.national.com
LM1575/LM2575/LM2575HV
Series
SIMPLE
SWITCHER
1A
Step-Down
Voltage
Regulator
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LM2575HVT-ADJ | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2575HVT-ADJ | 制造商:Texas Instruments 功能描述:IC SWITCHING REG 1A ADJ SMD 2575 |
| LM2575HVT-ADJ/LB03 | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2575HVT-ADJ/LF03 | 功能描述:直流/直流開關轉換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
| LM2575HVT-ADJ/NOPB | 功能描述:直流/直流開關轉換器 1A STEP-DOWN VLTG REG RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數量:2 最大工作溫度:+ 85 C 安裝風格:SMD/SMT |
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