參數(shù)資料
型號(hào)： LM27402SQX
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： SWITCHING CONTROLLER, 1350 kHz SWITCHING FREQ-MAX, QCC16
封裝： 4 X 4 MM, 0.80 MM HEIGHT, 0.65 MM PITCH, LLP-16
文件頁數(shù)： 1/32頁
文件大?。?/td> 653K
代理商： LM27402SQX
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
相關(guān)PDF資料
PDF描述
LM27402MHX SWITCHING CONTROLLER, 1350 kHz SWITCHING FREQ-MAX, PDSO16
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM27402SQX/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
LM27403 制造商:TI 制造商全稱:Texas Instruments 功能描述:Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based Overcurrent Protection and Programmable Thermal Shutdown
LM27403EVM 制造商:Texas Instruments 功能描述:LM27403EVM - Boxed Product (Development Kits)
LM27403EVM-POL600 制造商:Texas Instruments 功能描述:BOARD EVAL LM27403
LM27403SQ 制造商:TI 制造商全稱:Texas Instruments 功能描述:Synchronous Buck Controller with Temperature-Compensated, Inductor-DCR-Based Overcurrent Protection and Programmable Thermal Shutdown
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