Datasheet > LTC3538

LTC3538

更新时间： 2024-09-25 14:58:27

品牌	Logo	应用领域
亚德诺 - ADI		转换器
页数	文件大小	规格书
16页	210K
描述
800mA 同步降压-升压型 DC/DC 转换器

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中文翻译

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LTC3538 数据手册

LTC3538

800mA Synchronous

Buck-Boost

DC/DC Converter

FEATURES

DESCRIPTION

The LTC^®3538 is a highly efﬁcient, low noise, buck-boost

DC/DC converter that operates from input voltages above,

below, and equal to the output voltage. The topology

incorporated in the IC provides a continuous transfer

function through all operating modes, making the product

ideal for single Lithium Ion or multicell Alkaline or NiMH

applications where the output voltage is within the battery

voltage range.

■

Regulated Output with Input Voltages Above,

Below, or Equal to the Output

■

800mA Continuous Output Current from a Single

Lithium-Ion/Polymer Cell

■

Single Inductor

1.8V to 5.25V V

■

Range

OUT

■

2.4V to 5.5V V Range

1MHz Fixed Frequency Operation

Output Disconnect in Shutdown

35μA Quiesecent Current in Burst Mode Operation

<5μA Shutdown Current

The LTC3538 is suited for use in Micro Hard Disk Drive

(μHDD)applicationswithits800mAcurrentcapability.Burst

Mode^®operation provides high efﬁciency at light loads.

Internal Soft-Start

Small, Thermally Enhanced 8-Lead (2mm x 3mm)

DFN package

The LTC3538 includes two 0.17Ω N-channel and two

0.2Ω P-channel MOSFET switches. Operating frequency

is internally set to 1MHz to minimize solution footprint

while maximizing efﬁciency.

APPLICATIONS

Other features include <5μA shutdown current, internal

soft-start, short circuit protection and thermal shutdown.

The LTC3538 is available in a low proﬁle (0.75mm), ther-

mally enhanced 8-lead (2mm × 3mm) DFN package.

, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology

Corporation. All other trademarks are the property of their respective owners. Protected by

U.S. Patents including 5481178, 6304066, 6580258, 6166527, 6404251.

■

Miniature Hard Disk Drives

■

MP3 Players

■

Digital Cameras

■

Cellular Handsets

■

PDAs, Handheld PC

■

GPS Receivers

TYPICAL APPLICATION

Li-Ion/Polymer to 3.3V at 800mA

Efﬁciency vs V_IN

100

3.3μH

LOAD

= 3.3V

= 200mA

OUT

3.3V

800mA

LTC3538

464k

10k

SW1

SW2

2.9V TO 4.2V

OUT

33pF

OUT

10μF

22μF

PWM

BURST

GND

15k

330pF

200k

ON OFF

2.4

2.9

3.4

3.9

(V)

4.4

4.9

5.4

3538 TA01

3538 TA01b

*μP OPEN DRAIN I/O

3538fb

12 3 4 5 6 7...16

中文翻译

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与LTC3538相关器件

型号	品牌	获取价格	描述	数据表
LTC3538EDCB	Linear	获取价格	800mA Synchronous Buck-Boost DC/DC Converter
LTC3538EDCB#PBF	Linear	获取价格	LTC3538 - 800mA Synchronous Buck-Boost DC/DC Converter; Package: DFN; Pins: 8; Temperature
LTC3538EDCB#TR	Linear	获取价格	暂无描述
LTC3538EDCB#TRM	Linear	获取价格	IC 0.8 A SWITCHING REGULATOR, 1200 kHz SWITCHING FREQ-MAX, PDSO8, 2 X 3 MM, PLASTIC, DFN-8
LTC3538EDCB-PBF	Linear	获取价格	800mA Synchronous Buck-Boost DC/DC Converter
LTC3538EDCB-TR	Linear	获取价格	800mA Synchronous Buck-Boost DC/DC Converter
LTC3538EDCB-TRPBF	Linear	获取价格	800mA Synchronous Buck-Boost DC/DC Converter
LTC3539	Linear	获取价格	2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters
LTC3539	ADI	获取价格	2A、1MHz / 2MHz 同步升压型 DC/DC 转换器
LTC3539_15	Linear	获取价格	2A, 1MHz/2MHz Synchronous Step-Up DC/DC Converters

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