- 您现在的位置：买卖IC网 > PDF目录44548 > LM2576T-ADJLB03/NOPB (NATIONAL SEMICONDUCTOR CORP) 3 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, SFM5 PDF资料下载
参数资料
| 型号： | LM2576T-ADJLB03/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 3 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, SFM5 |
| 封装： | ROHS COMPLIANT, TO-220, 5 PIN |
| 文件页数： | 1/24页 |
| 文件大小： | 750K |
| 代理商： | LM2576T-ADJLB03/NOPB |
LM2576/LM2576HV Series
SIMPLE SWITCHER 3A Step-Down Voltage Regulator
General Description
The LM2576 series of regulators are monolithic integrated
circuits that provide all the active functions for a step-down
(buck) switching regulator, capable of driving 3A 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 LM2576 series offers a high-efficiency replacement for
popular three-terminal linear regulators. It substantially re-
duces the size of the heat sink, and in some cases no heat
sink is required.
A standard series of inductors optimized for use with the
LM2576 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 3A 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-regulator 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.
01147601
FIGURE 1.
August 2004
LM2576/LM2576HV
Series
SIMPLE
SWITCHER
3A
Step-Down
V
oltage
Regulator
2004 National Semiconductor Corporation
DS011476
www.national.com
相关PDF资料 |
PDF描述 |
|---|---|
| LM2576T-12FLOWLB03 | 3.5 A SWITCHING REGULATOR, 52 kHz SWITCHING FREQ-MAX, PSFM5 |
| LM2576T-12/LB03 | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSFM5 |
| LM2576HVT-ADJFLOWLB03/NOPB | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, ZFM5 |
| LM2576SX-12/NOPB | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
| LM2576SX-15/NOPB | 7.5 A SWITCHING REGULATOR, 63 kHz SWITCHING FREQ-MAX, PSSO5 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2576T-ADJ-V | 制造商:SEMTECH 制造商全称:Semtech Corporation 功能描述:Voltage-Mode SMPS Controller |
| LM2576TV | 制造商:未知厂家 制造商全称:未知厂家 功能描述:3.0A, 15V, Step-Down Switching Regulator |
| LM2576TV-005 | 功能描述:直流/直流开关调节器 5V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| LM2576TV-005G | 制造商:ON Semiconductor 功能描述: |
| LM2576TV-012 | 功能描述:直流/直流开关调节器 12V 3A Buck PWM RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
发布紧急采购，3分钟左右您将得到回复。