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參數資料
| 型號： | SC194A |
| 廠商： | Semtech Corporation |
| 英文描述： | 1A Synchronous Buck Converter with Integrated Power Devices |
| 中文描述： | 第1A同步降壓轉換器，集成了功率器件 |
| 文件頁數： | 1/17頁 |
| 文件大小： | 784K |
| 代理商： | SC194A |
1
www.semtech.com
SC194A
1A Synchronous Buck Converter
with Integrated Power Devices
POWER MANAGEMENT
Description
July 05, 2006
Typical Application Circuit
Applications
The SC194A is a synchronous step-down converter with
integrated power devices. The SC194A is designed for
single-cell Li-Ion battery applications, but can also be used
in
fi
xed 3.3V or 5V applications. The switching frequency is
nominally set to 1MHz, allowing the use of small inductors
and capacitors. The 1.3A maximum current rating of the
internal MOSFET switches allows a DC output current of
1A.
The SC194A has a
fl
exible clocking methodology that
allows it to be synchronized to an external oscillator or
controlled by the internal oscillator. The device can
operate in either forced PWM mode or in PSAVE mode. If
PSAVE mode is enabled the part will automatically enter
PFM at light loads to maintain maximum ef
fi
ciency across
the full load range.
For noise sensitive applications, PSAVE mode can be
disabled by synchronizing to an external oscillator, or
pulling the SYNC/PWM pin high. Shutdown turns off all
the control circuitry to achieve a typical shutdown current
of 0.1
μ
A.
Cell phones
Wireless communication chipset power
Personal media player
Notebook and sub-notebook computers
PDAs and mobile communicators
WLAN peripherals
Up to 93% ef
fi
ciency
Output current - 1A
Input range - 2.7V to 5.5V
Quiescent current - 17
μ
A
Four selectable output voltages
Dynamic voltage positioning capability
Fixed 1MHz frequency or 750kHz to 1.25MHz
synchronized operation
PSAVE operation to maximize ef
fi
ciency at light loads
Minimal external components
Fast transient response
100% duty cycle in dropout
Soft-start
Over-temperature and short-circuit protection
Space-saving lead-free package - MLP-10, 3 x 3mm
Features
SC194A
VIN
EN
SYNC/PWM VOUT
VID0
VID1 PGND
MODE GND
LX
C
IN
L1
C
OUT
10
μ
F
10
μ
F
4.7
μ
H
V
IN
2.7V to 5.5V
V
OUT
1.8V
1A
相關PDF資料 |
PDF描述 |
|---|---|
| SC194AEVB | 1A Synchronous Buck Converter with Integrated Power Devices |
| SC194AMLTRT | 1A Synchronous Buck Converter with Integrated Power Devices |
| SC194B | Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter |
| SC194BEVB | Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter |
| SC194BMLTRT | Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SC194AEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:1A Synchronous Buck Converter with Integrated Power Devices |
| SC194AML.TRT | 制造商:Semtech Corporation 功能描述: |
| SC194AMLTRT | 功能描述:IC REG BUCK ADJ 1A 10MLP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩壓器 - DC DC 開關穩壓器 系列:- 標準包裝:50 系列:- 類型:升壓（升壓） 輸出類型:可調式 輸出數:1 輸出電壓:5 V ~ 25 V 輸入電壓:2.3 V ~ 5.5 V PWM 型:電流模式 頻率 - 開關:600kHz，1.2MHz 電流 - 輸出:1A 同步整流器:無 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:8-TSSOP，8-MSOP（0.118"，3.00mm 寬） 包裝:管件 供應商設備封裝:8-MSOP |
| SC194B | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter |
| SC194BEVB | 制造商:SEMTECH 制造商全稱:Semtech Corporation 功能描述:Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter |
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