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參數資料
| 型號： | LMX2575MX-15 |
| 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, PDSO24 |
| 封裝： | SMT-24 |
| 文件頁數： | 1/30頁 |
| 文件大?。?/td> | 676K |
| 代理商： | LMX2575MX-15 |
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LM1575/LM2575/LM2575HV Series
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
power supplies.
Other features include a guaranteed ±4% tolerance on out-
put voltage within specified input voltages and output load
conditions, and ±10% on the oscillator frequency. External
shutdown is included, featuring 50 A (typical) standby cur-
rent. The output switch includes cycle-by-cycle current limit-
ing, as well as thermal shutdown for full protection under
fault conditions.
Features
n 3.3V, 5V, 12V, 15V, and adjustable output versions
n Adjustable version output voltage range,
1.23V to 37V (57V for HV version) ±4% max over
line and load conditions
n Guaranteed 1A output current
n Wide input voltage range, 40V up to 60V for HV version
n Requires only 4 external components
n 52 kHz fixed frequency internal oscillator
n TTL shutdown capability, low power standby mode
n High efficiency
n Uses readily available standard inductors
n Thermal shutdown and current limit protection
n P
+ Product Enhancement tested
Applications
n Simple high-efficiency step-down (buck) regulator
n Efficient pre-regualtor for linear regulators
n On-card switching regulators
n Positive to negative converter (Buck-Boost)
Typical Application (Fixed Output Voltage Versions)
SIMPLE SWITCHER is a registered trademark of National Semiconductor Corporation.
DS011475-1
Note: Pin numbers are for the TO-220 package.
May 1999
LM1575/LM2575/LM2575HV
Series
SIMPLE
SWITCHER
1A
Step-Down
V
oltage
Regulator
1999 National Semiconductor Corporation
DS011475
www.national.com
相關PDF資料 |
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|---|---|
| LMX2575MX-5.0 | 3.2 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PDSO24 |
| LM1576-5.0AK | 3.5 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, MBFM2 |
| LM1576-12AK | 3.5 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, MBFM2 |
| LM1596H/883 | SPECIALTY CONSUMER CIRCUIT, MBCY10 |
| LM1596H-MIL | SPECIALTY CONSUMER CIRCUIT, MBCY10 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2581 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LMX2581 Wideband Frequency Synthesizer with Integrated VCO |
| LMX2581EVAL/NOPB | 功能描述:時鐘和定時器開發工具 LMX2581 EVAL MOD RoHS:否 制造商:Texas Instruments 產品:Evaluation Modules 類型:Clock Conditioners 工具用于評估:LMK04100B 頻率:122.8 MHz 工作電源電壓:3.3 V |
| LMX2581EVM | 功能描述:LMX2581 - Timing, Frequency Synthesizer Evaluation Board 制造商:texas instruments 系列:- 零件狀態:有效 主要用途:計時，頻率合成器 嵌入式:- 使用的 IC/零件:LMX2581 主要屬性:帶 VCO 的單路分數-N PLL 輔助屬性:- 所含物品:板 標準包裝:1 |
| LMX2581SQ | 制造商:TI 制造商全稱:Texas Instruments 功能描述:LMX2581 Wideband Frequency Synthesizer with Integrated VCO |
| LMX2581SQ/NOPB | 制造商:Texas Instruments 功能描述:IC FREQ SYNTHESIZER VCO 32WQFN 制造商:Texas Instruments 功能描述:CLOCK GENERATION/OTHER IC |
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