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參數(shù)資料
| 型號： | SC191AWLTRT |
| 廠商： | Semtech Corporation |
| 英文描述： | Low Supply Ripple Synchronous Buck Conversion Regulator |
| 中文描述： | 低電源紋波同步降壓轉換穩(wěn)壓器 |
| 文件頁數(shù)： | 1/13頁 |
| 文件大?。?/td> | 409K |
| 代理商： | SC191AWLTRT |
www.semtech.com
1
POWER MANAGEMENT
Description
SC191
Low Supply Ripple Synchronous
Buck Conversion Regulator
April 12, 2006
Features
Typical Application Circuit
Applications
The SC191 is a synchronous step-down converter with
integrated power devices and an integrated front-end
LDO regulator to minimize input supply ripple. If supply
ripple is not a concern, the front-end LDO regulator can be
bypassed externally to maximize ef
fi
ciency.
The internal MOSFET switches provide peak current greater
than 550mA to achieve a DC output of at least 330mA over
the rated input voltage range, making the SC191 ideal for
single-cell Li-ion battery applications as well as
fi
xed 3.3V
and 5V
fi
xed input applications. The output is a
fi
xed 1.2V
- ideal for low-voltage microprocessors. Other voltage
options are available (consult the factory for details).
Additional features include internal soft-start to limit in-
rush current, over-current protection, over-temperature
protection, and over-voltage protection.
The 1MHz switching frequency allows the use of small
surface mount capacitors and inductors, and no other
external compensation components are needed. The
device is available in a low pro
fi
le (0.8mm max height)
2.3mm x 2.3mm MLPD 8-lead package, minimizing area
without compromising performance.
Less than 1mV Supply Ripple
2.7V to 5.5V Input Range
330mA Guaranteed Output Current
Fixed Frequency 1MHz Operation
No Schottky Diode Required
Over-Current Protection
Over-Voltage Protection
Over-Temperature Protection
Soft-Start
No External Compensation Required
MLPD-8, 2.3mm x 2.3mm Package
WEEE and RoHS Compliant
Cell Phones
Cordless Phones
Notebook and Subnotebook Computers
PDAs and Mobile Communicators
WLAN Peripherals
Wireless Modules
1 Li-Ion or 3 NiMH/NiCd Powered Devices
SC191
L
4.7
μ
H
C
IN
4.7
μ
F
VIN
VOUT
BP
GND
LX
PVIN
PGND
C
BP
4.7
μ
F
EN
V
OUT
C
OUT
4.7
μ
F
V
IN
1
5
8
6
3
4
2
7
Patent Pending
相關PDF資料 |
PDF描述 |
|---|---|
| SC192 | Synchronous Buck Converter with Integrated Power Devices |
| SC192IMLTRT | Synchronous Buck Converter with Integrated Power Devices |
| SC192EVB | Synchronous Buck Converter with Integrated Power Devices |
| SC192IMLTR | Synchronous Buck Converter with Integrated Power Devices |
| SC194A | 1A Synchronous Buck Converter with Integrated Power Devices |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| SC192 | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Converter with Integrated Power Devices |
| SC192EVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Converter with Integrated Power Devices |
| SC192IMLTR | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Synchronous Buck Converter with Integrated Power Devices |
| SC192IMLTRT | 功能描述:IC REG BUCK ADJ 0.7A 10MLPD RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 標準包裝:250 系列:- 類型:降壓（降壓） 輸出類型:固定 輸出數(shù):1 輸出電壓:1.2V 輸入電壓:2.05 V ~ 6 V PWM 型:電壓模式 頻率 - 開關:2MHz 電流 - 輸出:500mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:6-UFDFN 包裝:帶卷 (TR) 供應商設備封裝:6-SON（1.45x1） 產品目錄頁面:1032 (CN2011-ZH PDF) 其它名稱:296-25628-2 |
| SC194A | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1A Synchronous Buck Converter with Integrated Power Devices |
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