SC196EVB

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
18页	657K
描述
1.5A Synchronous Buck Converter with Integrated Power Devices

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SC196EVB 数据手册

SC196

1.5A Synchronous Buck Converter

with Integrated Power Devices

POWER MANAGEMENT

Description

Features

The SC196 is a synchronous step-down converter with Up to 95% efﬁciency

integrated power devices designed for use in applications V_OUTadjustable from less than 0.8V to V_IN

using a single-cell Li-ion battery. Its wide input voltage Output current — 1.5A

range also makes it suitable for use in systems with ﬁxed Input range — 2.5V to 5.5V

3.3Vor5Vsupplyrailsavailable.Theswitchingfrequencyis Quiescent current — 17μA

nominally set to 1MHz, allowing the use of small inductors Fixed 1MHz frequency or 750kHz to 1.25MHz

and capacitors. The current rating of the internal MOSFET

switches allows a DC output current of 1.5A.

synchronized operation

PSAVE operation to maximize efﬁciency at light loads

Shutdown current <1μA

The output voltage is set by connecting a resistor divider Fast transient response

from the ﬁlter inductor to the feedback pin. See the 100% duty cycle in dropout

SC196A for pin-programmable output voltages.

Soft-start

Over-temperature and short-circuit protection

The SC196 has a ﬂexible clocking methodology that Lead-free package — MLPD10-UT, 3 x 3 x 0.6 mm

allows it to be synchronized to an external oscillator or

controlled by the internal oscillator. The device operates

in either forced PWM mode or in PSAVE mode. If PSAVE

Applications

mode is enabled, the part will automatically enter PFM at

Cell phones

light loads to maintain maximum efﬁciency across the full

Wireless communication chipset power

load range.

Personal media players

Microprocessor/DSP core/IO power

For noise sensitive applications, PSAVE mode can be

PDAs and handheld computers

disabled by synchronizing to an external oscillator or

WLAN peripherals

pulling the SYNC/PWM pin high. Shutdown turns off all

USB powered modems

the control circuitry to achieve a typical shutdown current

1 Li-Ion or 3 NiMH/NiCd powered devices

of 0.1μA.

Typical Application Circuit

V_OUT

<0.8V to V_IN

4.7μH

V_IN

2.5V to 5.5V

1.5A

SC196

VIN

C_FB1

10pF

VOUT

C_IN

10μF

PVIN

R_FB1

R_FB2

MODE

ADJ

C_OUT

22μF

SYNC/PWM

PGND

GND

February 8, 2007

www.semtech.com

12 3 4 5 6 7...18

中文翻译

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与SC196EVB相关器件

型号	品牌	获取价格	描述	数据表
SC196ULTRT	SEMTECH	获取价格	1.5A Synchronous Buck Converter with Integrated Power Devices
SC197	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator
SC1972	MITSUBISHI	获取价格	NPN EPITAXIAL PLANAR TYPE(for RF power amplifiers on VHF band Mobile radio applications)
SC197EVB	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator
SC197ULTRT	SEMTECH	获取价格	3.5MHz, 500mA Synchronous Dual Step-Down DC-DC Regulator
SC198	SEMTECH	获取价格	Dual DC-DC Buck Converter with High Current Capability
SC198_07	SEMTECH	获取价格	Dual DC-DC Buck Converter with High Current Capability
SC198A	SEMTECH	获取价格	Dual DC-DC Buck Converter with High Current Capability
SC198AEVB	SEMTECH	获取价格	Dual DC-DC Buck Converter with High Current Capability
SC198AMLTRT	SEMTECH	获取价格	Dual DC-DC Buck Converter with High Current Capability

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