參數(shù)資料
型號： LM27402MHX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 1350 kHz SWITCHING FREQ-MAX, PDSO16
封裝： 5 X 4.40 MM, 0.90 MM HEIGHT, 0.65 MM PITCH, ETSSOP-16
文件頁數(shù)： 1/32頁
文件大?。?/td> 653K
代理商： LM27402MHX
LM27402
June 14, 2010
High Performance Synchronous Buck Controller with DCR
Current Sensing
General Description
The LM27402 is a synchronous voltage mode DC/DC buck
controller with inductor DCR current sense capability. Sens-
ing the inductor current eliminates the need to add resistive
powertrain elements which increases overall efficiency and
facilitates accurate continuous current limit sensing. A 0.6V
±1% voltage reference enables high accuracy and low volt-
age capability at the output. An input operating voltage range
of 3V to 20V makes the LM27402 suitable for a large variety
of input rails.
The LM27402 voltage mode control loop incorporates input
voltage feed-forward to maintain stability throughout the en-
tire input voltage range. The switching frequency is adjustable
from 200 kHz to 1.2 MHz. Dual high current integrated N-
channel MOSFET drivers support large Q
G, low RDS(ON)
MOSFETs. A power good indicator provides power rail se-
quencing capability and output fault detection. Adjustable
external soft-start capability limits inrush current and provides
monotonic output control during startup. Other features in-
clude external tracking of other power supplies, integrated
LDO bias supply, and synchronization capability. The
LM27402 is offered in a 16 pin eTSSOP package and a 4 mm
x 4 mm 16 pin exposed LLP.
Features
■ Input operating voltage range of 3V to 20V
■ Continuous inductor DCR or shunt resistor current sensing
■ 0.6V ±1% reference (-40°C to 125°C junction
temperature)
■ Output voltage as high as 95% of input voltage
■ Integrated MOSFET drivers
■ Internal LDO bias supply
■ External clock synchronization
■ Adjustable soft-start with external capacitor
■ Pre-biased startup capability
■ Power supply tracking
■ Input voltage feed-forward
■ Power good indicator
■ Precision enable with hysteresis
Applications
■ High current, low voltage FPGA/ASIC DC/DC converters
■ General purpose high current buck converters
■ Telecom, datacom, networking, distributed power
architectures
Typical Application Circuit
30092601
PowerWise is a registered trademark of National Semiconductor Corporation.
2010 National Semiconductor Corporation
300926
www.national.com
LM27402
High
Performance
Synchronous
Buck
Controller
with
DCR
Current
Sensing
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM27402MHX/NOPB 功能描述:DC/DC 開關(guān)控制器 High Perf Sync Buck Cntrlr RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
LM27402SQ 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
LM27402SQ/NOPB 功能描述:DC/DC 開關(guān)控制器 RoHS:否 制造商:Texas Instruments 輸入電壓:6 V to 100 V 開關(guān)頻率: 輸出電壓:1.215 V to 80 V 輸出電流:3.5 A 輸出端數(shù)量:1 最大工作溫度:+ 125 C 安裝風(fēng)格: 封裝 / 箱體:CPAK
LM27402SQEVAL/NOPB 功能描述:電源管理IC開發(fā)工具 LM27402SQ EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM27402SQX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:High Performance Synchronous Buck Controller with DCR Current Sensing
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