LTC1435IS#TR

更新时间： 2024-11-19 13:01:27

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
20页	407K
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LTC1435IS#TR 数据手册

LTC1435

High Efficiency Low Noise

Synchronous Step-Down

Switching Regulator

FEATURES

DESCRIPTION

The LTC^®1435 is a synchronous step-down switching

regulator controller that drives external N-channel power

MOSFETs using a fixed frequency architecture. Burst

Mode^TMoperation provides high efficiency at low load

currents.Amaximumdutycyclelimitof99%provideslow

dropout operation which extends operating time in bat-

tery-operated systems.

■

Dual N-Channel MOSFET Synchronous Drive

■

Programmable Fixed Frequency

■

Wide V_INRange: 3.5V to 36V Operation

■

Ultrahigh Efficiency

■

Very Low Dropout Operation: 99% Duty Cycle

■

Low Standby Current

■

Secondary Feedback Control

■

Programmable Soft Start

The operating frequency is set by an external capacitor

allowing maximum flexibility in optimizing efficiency. A

secondary winding feedback control pin, SFB, guarantees

regulation regardless of load on the main output by

forcing continuous operation. Burst Mode operation is

inhibited when the SFB pin is pulled low which reduces

noise and RF interference.

■

Remote Output Voltage Sense

■

Logic Controlled Micropower Shutdown: I_Q< 25µA

■

Foldback Current Limiting (Optional)

■

Current Mode Operation for Excellent Line and Load

Transient Response

Output Voltages from 1.19V to 9V

■

^{Available in 16-L}U^{ead Narrow SO and SSOP Packages}

Soft start is provided by an external capacitor which can

be used to properly sequence supplies. The operating

currentlevelisuser-programmableviaanexternalcurrent

sense resistor. Wide input supply range allows operation

from 3.5V to 30V (36V maximum).

APPLICATIONS

■

Notebook and Palmtop Computers, PDAs

Cellular Telephones and Wireless Modems

Portable Instruments

Battery-Operated Devices

■

, LTC and LT are registered trademarks of Linear Technology Corporation.

Burst Mode is a trademark of Linear Technology Corporation.

■

DC Power Distribution Systems

TYPICAL APPLICATION

4.5V TO 28V

OSC

22µF

35V

× 2

Si4412DY

RUN/SS

68pF

0.1µF

SENSE

0.033Ω

OUT

2.9V/3.5A

LTC1435

INTV

10µH

330pF

CMDSH-3

OUT

32.4k

100µF

10V

0.1µF

10k

SGND

BOOST

22.1k

× 2

MBRS140T3

100pF

4.7µF

Si4412DY

OSENSE

PGND

SENSE

–

SENSE

1000pF

1435 F01

Figure 1. High Efficiency Step-Down Converter

12 3 4 5 6 7...20

中文翻译

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与LTC1435IS#TR相关器件

型号	品牌	获取价格	描述	数据表
LTC1436A	Linear	获取价格	High Efficiency Low Noise Synchronous Step-Down Switching Regulators
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LTC1436ACGN	Linear	获取价格	High Efficiency Low Noise Synchronous Step-Down Switching Regulators
LTC1436ACGN#TRPBF	Linear	获取价格	LTC1436A - High Efficiency Low Noise Synchronous Step-Down Switching Regulators; Package:
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LTC1436ACGN-PLL#PBF	Linear	获取价格	LTC1436A - High Efficiency Low Noise Synchronous Step-Down Switching Regulators; Package:
LTC1436AEGN#TRPBF	Linear	获取价格	LTC1436A - High Efficiency Low Noise Synchronous Step-Down Switching Regulators; Package:
LTC1436AIGN	Linear	获取价格	High Efficiency Low Noise Synchronous Step-Down Switching Regulators
LTC1436AIGN#TR	Linear	获取价格	LTC1436A - High Efficiency Low Noise Synchronous Step-Down Switching Regulators; Package:
LTC1436AIGN-PLL	Linear	获取价格	High Efficiency Low Noise Synchronous Step-Down Switching Regulators

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