參數(shù)資料
型號(hào)： LM20133MH
廠商： NATIONAL SEMICONDUCTOR CORP
元件分類： 穩(wěn)壓器
英文描述： 3A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
中文描述： 5.7 A SWITCHING REGULATOR, 460 kHz SWITCHING FREQ-MAX, PDSO16
封裝： TSSOP-16
文件頁(yè)數(shù)： 1/22頁(yè)
文件大?。?/td> 618K
代理商： LM20133MH
November 13, 2007
LM20133
3A, PowerWise
Synchronous Buck Regulator with Input
Synchronization
General Description
The LM20133 is a full featured synchronous buck regulator
capable of delivering up to 3A of continuous output current.
The current mode control loop can be compensated to be
stable with virtually any type of output capacitor. For most
cases, compensating the device only requires two external
components, providing maximum flexibility and ease of use.
The device is optimized to work over the input voltage range
of 2.95V to 5.5V making it suited for a wide variety of low volt-
age systems.
The device features internal over voltage protection (OVP)
and over current protection (OCP) circuits for increased sys-
tem reliability. A precision enable pin and integrated UVLO
allows the turn on of the device to be tightly controlled and
sequenced. Start-up inrush currents are limited by both an
internally fixed and externally adjustable Soft-Start circuit.
Fault detection and supply sequencing is possible with the
integrated power good circuit.
The switching frequency of the LM20133 can be synchro-
nized to an external clock by use of the SYNC pin. The SYNC
pin is capable of synchronizing to input signals ranging from
500 kHz to 1.5 MHz.
The LM20133 is designed to work well in multi-rail power
supply architectures. The output voltage of the device can be
configured to track a higher voltage rail using the SS/TRK pin.
If the output of the LM20133 is pre-biased at startup it will not
sink current to pull the output low until the internal soft-start
ramp exceeds the voltage at the feedback pin.
The LM20133 is offered in a 16-pin eTSSOP package with an
exposed pad that can be soldered to the PCB, eliminating the
need for bulky heatsinks.
Features
■
Input voltage range 2.95V to 5.5V
■
Accurate current limit minimizes inductor size
■
97% peak efficiency
■
Frequency synchronization pin
■
32 m
integrated FET switches
■
Starts up into pre-biased loads
■
Output voltage tracking
■
Peak current mode control
■
Adjustable Soft-Start with external capacitor
■
Precision enable pin with hysteresis
■
Integrated OVP, UVLO, power good and thermal
shutdown
■
eTSSOP-16 exposed pad package
Applications
■
Simple to design, high efficiency point of load regulation
from a 5V or 3.3V bus
■
High Performance DSPs, FPGAs, ASICs and
microprocessors
■
Broadband, Networking and Optical Communications
Infrastructure
Typical Application Circuit
30030301
PowerWise
is a registered trademark of National Semiconductor Corporation.
2007 National Semiconductor Corporation
300303
www.national.com
L
相關(guān)PDF資料
PDF描述
LM20133MHE 3A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
LM20133MHX 3A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
LM20134 4A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
LM20134MH 4A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
LM20134MHE 4A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM20133MH/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM20133MHE 制造商:Texas Instruments 功能描述:Conv DC-DC Single Step Down 2.95V to 5.5V 16-Pin TSSOP EP T/R
LM20133MHE/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
LM20133MHX 制造商:NSC 制造商全稱:National Semiconductor 功能描述:3A, PowerWise㈢ Synchronous Buck Regulator with Input Synchronization
LM20133MHX/NOPB 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT
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