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參數(shù)資料
| 型號： | SC4508IMLTRT |
| 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 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 209K |
| 代理商： | SC4508IMLTRT |
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
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PDF描述 |
|---|---|
| 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 |
| SC4509SKTRT | Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2 |
| SC4509WLTRT | Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2 |
| SC4510 | High Performance Synchronous Buck Controller With Reference Tracking |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SC4509 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2 |
| SC4509EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Highly Integrated Step-Up Converter for White LED Applications in MLPD-W8-2x2 |
| SC4509SK.TRT | 制造商:SEMTECH 功能描述:I.C. |
| SC4509SKTRT | 功能描述:IC LED DRVR WT/OLED BCKLT SOT236 RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:60 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?線性（LDO），PWM，升壓（升壓） 輸出數(shù):8 內(nèi)部驅(qū)動器:是 類型 - 主要:背光 類型 - 次要:RGB，白色 LED 頻率:500kHz ~ 1.5MHz 電源電壓:4.75 V ~ 26 V 輸出電壓:45V 安裝類型:* 封裝/外殼:* 供應(yīng)商設(shè)備封裝:* 包裝:* 工作溫度:-40°C ~ 85°C |
| SC4509WLTRT | 功能描述:IC LED DRVR WT/OLED BCKLT MLPD-8 RoHS:是 類別:集成電路 (IC) >> PMIC - LED 驅(qū)動器 系列:- 標(biāo)準(zhǔn)包裝:6,000 系列:- 恒定電流:- 恒定電壓:- 拓?fù)?開路漏極，PWM 輸出數(shù):4 內(nèi)部驅(qū)動器:是 類型 - 主要:LED 閃爍器 類型 - 次要:- 頻率:400kHz 電源電壓:2.3 V ~ 5.5 V 輸出電壓:- 安裝類型:表面貼裝 封裝/外殼:8-VFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:8-HVSON 包裝:帶卷 (TR) 工作溫度:-40°C ~ 85°C 其它名稱:935286881118PCA9553TK/02-TPCA9553TK/02-T-ND |
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