- 您现在的位置：买卖IC网 > PDF目录67756 > LM2734XMKX/NOPB (NATIONAL SEMICONDUCTOR CORP) 2.5 A SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO6 PDF资料下载
参数资料
| 型号： | LM2734XMKX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 2.5 A SWITCHING REGULATOR, 1900 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | TSOT-23, 6 PIN |
| 文件页数： | 1/24页 |
| 文件大小： | 466K |
| 代理商： | LM2734XMKX/NOPB |
June 4, 2008
LM2734
Thin SOT23 1A Load Step-Down DC-DC Regulator
General Description
The LM2734 regulator is a monolithic, high frequency, PWM
step-down DC/DC converter in a 6-pin Thin SOT23 package.
It provides all the active functions to provide local DC/DC
conversion with fast transient response and accurate regula-
tion in the smallest possible PCB area.
With a minimum of external components and online design
support through WEBENCH, the LM2734 is easy to use.
The ability to drive 1A loads with an internal 300m
NMOS
switch using state-of-the-art 0.5m BiCMOS technology re-
sults in the best power density available. The world class
control circuitry allows for on-times as low as 13ns, thus sup-
porting exceptionally high frequency conversion over the en-
tire 3V to 20V input operating range down to the minimum
output voltage of 0.8V. Switching frequency is internally set
to 550kHz (LM2734Y) or 1.6MHz (LM2734X), allowing the
use of extremely small surface mount inductors and chip ca-
pacitors. Even though the operating frequencies are very
high, efficiencies up to 90% are easy to achieve. External
shutdown is included, featuring an ultra-low stand-by current
of 30nA. The LM2734 utilizes current-mode control and inter-
nal compensation to provide high-performance regulation
over a wide range of operating conditions. Additional features
include internal soft-start circuitry to reduce inrush current,
pulse-by-pulse current limit, thermal shutdown, and output
over-voltage protection.
Features
■ Thin SOT23-6 package
■ 3.0V to 20V input voltage range
■ 0.8V to 18V output voltage range
■ 1A output current
■ 550kHz (LM2734Y) and 1.6MHz (LM2734X)
switching frequencies
■ 300m NMOS switch
■ 30nA shutdown current
■ 0.8V, 2% internal voltage reference
■ Internal soft-start
■ Current-Mode, PWM operation
■ WEBENCH online design tool
■ Thermal shutdown
■ LM2734XQ/LM2734YQ are AEC-Q100 Grade 1 qualified
and are manufactured on an Automotive Grade Flow
Applications
■ Local Point of Load Regulation
■ Core Power in HDDs
■ Set-Top Boxes
■ Battery Powered Devices
■ USB Powered Devices
■ DSL Modems
■ Notebook Computers
■ Automotive
Typical Application Circuit
20102301
Efficiency vs Load Current
V
IN = 5V, VOUT = 3.3V
20102345
WEBENCH is a trademark of Transim.
2008 National Semiconductor Corporation
201023
www.national.com
LM2734
Thin
SOT23
1A
Load
Step-Down
DC-DC
Regulator
相关PDF资料 |
PDF描述 |
|---|---|
| LM3102TLX-1 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PBGA28 |
| LM3102TL-1 | SWITCHING REGULATOR, 1000 kHz SWITCHING FREQ-MAX, PBGA28 |
| LM3411A-3.3MWC | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 3.3 V, UUC |
| LM3411A-3.3MDC | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 3.3 V, UUC |
| LM3411A-5.0MWC | 1-OUTPUT THREE TERM VOLTAGE REFERENCE, 5 V, UUC |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LM2734XQMK | 制造商:Texas Instruments 功能描述:DC DC REG BUCK 1A 1.6MHZ 6TSOT 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 1.6MHZ, 6TSOT 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 1.6MHZ, 6TSOT, Primary Input Voltage:20V, No. of Outputs:1, 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 1.6MHZ, 6TSOT, Primary Input Voltage:20V, No. of Outputs:1, Output Voltage:18V, Output Current:1A, Voltage Regulator Case Style:SOT-23, No. of Pins:6, Operating Temperature Min:-40C, Operating Temperature , RoHS Compliant: Yes |
| LM2734XQMK/NOPB | 功能描述:直流/直流开关调节器 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 |
| LM2734XQMKE | 制造商:Texas Instruments 功能描述:DC DC REG, BUCK, 1A, 1.6MHZ, 6TSOT |
| LM2734XQMKE/NOPB | 功能描述:直流/直流开关调节器 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 |
| LM2734XQMKX/NOPB | 功能描述:直流/直流开关调节器 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。