參數(shù)資料
型號(hào)： SC4508
廠商： Semtech Corporation
英文描述： Buck or Buck-Boost(Inverting) Current Mode Controller
中文描述： 降壓或降壓升壓（反相）電流模式控制器
文件頁(yè)數(shù)： 1/10頁(yè)
文件大小： 209K
代理商： SC4508
POWER MANAGEMENT
Description
The SC4508 is a low voltage current mode switching regu-
lator controller that drives a P-channel power MOSFET
with programmable switching frequency. It can be con-
figured in either buck or buck boost (inverting) convert-
ers. The converters can be operated from 2.7V to 15V
input voltage range. The typical operating supply current
is 3mA and a shutdown pin allows the user to turn the
controller off reducing it to less than 200
μ
A. The output
voltage can adjusted by external resistor divider. The
switching frequency is programmable up to 1.5MHz,
allowing small inductor and capacitor values to minimize
PCB space. The operating current level is programmable
via an external sense resistor. Accessible reference volt-
age allows users to make output voltage as low as they
want.
1
www.semtech.com
SC4508
Buck or Buck-Boost(Inverting)
Current Mode Controller
Revision: November 30, 2004
Features
Typical Application Circuits
Applications
Low power point of use converters
Single or multiple output low power converters
Positive and/or negative output voltage
DSL cards
Graphic cards
I/O cards
Negative bias supplies
Wide input voltage range 2.7V to 15V
Programmable output voltage
Programmable switching frequency up to 1.5MHz
Buck or buck boost(inverting) configuration
Current mode control with slope compensation
Very low quiescent current in shutdown mode
Accessible reference voltage
MLPQ-12 package
VREF
CS
OUT
VDD
FB+
FB-
COMP
SS/SHDN
OSC
SC4508
Vin
GND
CS
OSC
VDD
Vin
SS/SHDN
FB-
GND
SC4508
OUT
FB+
VREF
COMP
相關(guān)PDF資料
PDF描述
SC4508IMLTRT Buck or Buck-Boost(Inverting) Current Mode Controller
SC4509 Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2
SC4509EVB Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2
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SC4509WLTRT Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SC4508A 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Buck or Buck-Boost (Inverting) Current Mode Controller
SC4508ABUCK-BOOSTEVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Buck or Buck-Boost (Inverting) Current Mode Controller
SC4508ABUCKEVB 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Buck or Buck-Boost (Inverting) Current Mode Controller
SC4508AMLTRT 功能描述:IC REG CTRLR BST INV PWM 12-MLPQ RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 切換控制器 系列:- 特色產(chǎn)品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 標(biāo)準(zhǔn)包裝:1 系列:PowerWise® PWM 型:電壓模式 輸出數(shù):1 頻率 - 最大:1MHz 占空比:81% 電源電壓:4.5 V ~ 18 V 降壓:是 升壓:無(wú) 回掃:無(wú) 反相:無(wú) 倍增器:無(wú) 除法器:無(wú) Cuk:無(wú) 隔離:無(wú) 工作溫度:-5°C ~ 125°C 封裝/外殼:32-WFQFN 裸露焊盤 包裝:Digi-Reel® 產(chǎn)品目錄頁(yè)面:1303 (CN2011-ZH PDF) 其它名稱:LM3754SQDKR
SC4508IMLTRT 制造商:Semtech Corporation 功能描述:DC/DC Converter (DC-DC) / Switching Regu
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