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SC194AEVB

更新时间： 2024-10-01 04:05:31

品牌	Logo	应用领域
商升特 - SEMTECH		转换器
页数	文件大小	规格书
17页	777K
描述
1A Synchronous Buck Converter with Integrated Power Devices

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SC194AEVB 数据手册

SC194A

1A Synchronous Buck Converter

with Integrated Power Devices

POWER MANAGEMENT

Description

Features

The SC194A is a synchronous step-down converter with Up to 93% efﬁciency

Output current - 1A

Input range - 2.7V to 5.5V

Quiescent current - 17μA

Four selectable output voltages

Dynamic voltage positioning capability

Fixed 1MHz frequency or 750kHz to 1.25MHz

synchronized operation

PSAVE operation to maximize efﬁciency at light loads

Minimal external components

Fast transient response

integrated power devices. The SC194A is designed for

single-cell Li-Ion battery applications, but can also be used

in ﬁxed 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 ﬂexible 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 efﬁciency across

the full load range.

100% duty cycle in dropout

Soft-start

Over-temperature and short-circuit protection

Space-saving lead-free package - MLP-10, 3 x 3mm

Applications

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 0.1μA.

Cell phones

Wireless communication chipset power

Personal media player

Notebook and sub-notebook computers

PDAs and mobile communicators

WLAN peripherals

Typical Application Circuit

SC194A

V_OUT

1.8V

VIN

V_IN

4.7μH

2.7V to 5.5V

SYNC/PWM

VID0

VOUT

C_OUT

C_IN

VID1

MODE

PGND

GND

10μF

July 05, 2006

www.semtech.com

12 3 4 5 6 7...17

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与SC194AEVB相关器件

型号	品牌	获取价格	描述	数据表
SC194AMLTRT	SEMTECH	获取价格	1A Synchronous Buck Converter with Integrated Power Devices
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SC194BEVB	SEMTECH	获取价格	Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter
SC194BMLTRT	SEMTECH	获取价格	Selectable 3.6V/3.3V/3.0V/2.5V 1A Synchronous Buck Converter
SC195	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
SC195_10	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
SC1959	ETC	获取价格	Mini size of Discrete semiconductor elements
SC195B	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
SC195BCSTRT	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Step Down DC-DC Regulator
SC195BEVB	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Step Down DC-DC Regulator