參數(shù)資料
型號(hào)： LM25005
廠商： National Semiconductor Corporation
英文描述： 42V, 2.5A STEP-DOWN SWITCHING REGULATOR
中文描述： 42V的2.5A降壓型開關(guān)穩(wěn)壓
文件頁(yè)數(shù)： 1/21頁(yè)
文件大小： 756K
代理商： LM25005
LM25005
42V, 2.5A Step-Down Switching Regulator
General Description
The LM25005 switching regulator features all of the func-
tions necessary to implement an efficient, high voltage buck
regulator using a minimum of external components. This
easy to use regulator includes a 42V, 160m
, N-channel
MOSFET, with an output current capability of 2.5 Amps. The
regulator control method is based upon current mode control
utilizing an emulated current ramp. Current mode control
provides inherent line voltage feed-forward, cycle-by-cycle
current limiting and ease of loop compensation. The use of
an emulated control ramp reduces noise sensitivity of the
pulse-width modulation circuit, allowing reliable control of
very small duty cycles necessary in high input voltage appli-
cations. The operating frequency is programmable from
50kHz to 500kHz. An oscillator synchronization pin allows
multiple LM25005 regulators to self-synchronize or to be
synchronized to an external clock. Additional protection fea-
tures include: current limit, thermal shutdown and remote
shutdown capability. The device is available in a power
enhanced TSSOP-20 package featuring an exposed die
attach pad to aid thermal dissipation.
Features
n
Integrated 42V, 160m
N-channel MOSFET
n
Ultra-wide input voltage range from 7V to 42V
n
Internal bias regulator
n
Adjustable output voltage from 1.225V
n
1.5% feedback reference accuracy
n
Current mode control with emulated inductor current
ramp
n
Single resistor oscillator frequency setting
n
Oscillator synchronization input
n
Programmable soft-start
n
Shutdown / Standby input
n
Wide bandwidth error amplifier
n
Thermal Shutdown
Package
n
TSSOP-20EP (Exposed Pad)
Simplified Application Schematic
20170001
February 2006
L
2006 National Semiconductor Corporation
DS201700
www.national.com
相關(guān)PDF資料
PDF描述
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LM25005_06 制造商:NSC 制造商全稱:National Semiconductor 功能描述:42V, 2.5A Step-Down Switching Regulator
LM25005EVAL 功能描述:電源管理IC開發(fā)工具 LM25005 EVAL BOARD RoHS:否 制造商:Maxim Integrated 產(chǎn)品:Evaluation Kits 類型:Battery Management 工具用于評(píng)估:MAX17710GB 輸入電壓: 輸出電壓:1.8 V
LM25005EVAL 制造商:Texas Instruments 功能描述:EVAL BOARD, LM25005 42V, 2.5A REGULATORU
LM25005MH 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
LM25005MH/NOPB 功能描述:直流/直流開關(guān)調(diào)節(jié)器 42V,2.5A STEP-DOWN SWITCHING REG RoHS:否 制造商:International Rectifier 最大輸入電壓:21 V 開關(guān)頻率:1.5 MHz 輸出電壓:0.5 V to 0.86 V 輸出電流:4 A 輸出端數(shù)量: 最大工作溫度: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:PQFN 4 x 5
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