Datasheet > 1735I

1735I

更新时间： 2024-11-25 12:35:19

品牌	Logo	应用领域
凌特 - Linear		稳压器开关
页数	文件大小	规格书
32页	379K
描述
High Efficiency Synchronous Step-Down Switching Regulator

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中文翻译

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数据手册

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1735I 数据手册

LTC1735

High Efficiency

Synchronous Step-Down

Switching Regulator

FEATURES

DESCRIPTIO

The LTC^®1735 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. The precision 0.8V reference is compatible with

future generation microprocessors. OPTI-LOOP compen-

sation allows the transient response to be optimized over

a wide range of output capacitance and ESR values.

■

Synchronizable/Programmable Fixed Frequency

OPTI-LOOP^TMCompensation Minimizes C_OUT

■

±1% Output Voltage Accuracy

■

Dual N-Channel MOSFET Synchronous Drive

Wide V_INRange: 4V to 36V Operation

V_OUTRange: 0.8V to 6V

Internal Current Foldback

Output Overvoltage Crowbar Protection

Latched Short-Circuit Shutdown Timer

with Defeat Option

The operating frequency (synchronizable up to 500kHz) is

set by an external capacitor allowing maximum flexibility

in optimizing efficiency. A forced continuous control pin

reduces noise and RF interference and can assist second-

ary winding regulation by disabling Burst Mode operation

when the main output is lightly loaded.

■

Very Low Dropout Operation: 99% Duty Cycle

Forced Continuous Control Pin

Optional Programmable Soft-Start

Remote Output Voltage Sense

Power Good Output (LTC1735F Only)

Logic Controlled Micropower Shutdown: I_Q< 25µA

LTC1435 Pin Compatible with

Protection features include internal foldback current lim-

iting, output overvoltage crowbar and optional short-

circuit shutdown. Soft-start is provided by an external

capacitor that can be used to properly sequence supplies.

The operating current level is user-programmable via an

external current sense resistor. Wide input supply range

allows operation from 4V to 30V (36V maximum).

Minor Component Changes

■

Available in 16-Lead Narrow SSOP, SO Packages and

20-Lead TSSOP Package (LTC1735F Only)

APPLICATIO S

■

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

Burst Mode and OPTI-LOOP are trademarks of Linear Technology Corporation.

Notebook and Palmtop Computers, PDAs

■

Cellular Telephones and Wireless Modems

■

DC Power Distribution Systems

TYPICAL APPLICATIO

5V TO 24V

OSC

0.1µF

FDS6680A

22µF

OSC

50V

47pF

0.22µF

RUN/SS

: PANASONIC EEFUEOG181R

OUT

: MARCON THCR70E1H226ZT

BOOST

L1: PANASONIC ETQP6F2R0HFA

: IRC LRF2010-01-R005J

SENSE

330pF

33k

LTC1735

2µH

SENSE

100pF

CMDSH-3

0.005Ω

OUT

SGND

1.6V

20k

100pF

INTV

OSENSE

OUT

180µF

4.7µF

MBRS340T3

20k

FDS6680A

–

SENSE

×4

1000pF

PGND

1735 F01

Figure 1. High Efficiency Step-Down Converter

1735fc

12 3 4 5 6 7...32

中文翻译

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与1735I相关器件

型号	品牌	获取价格	描述	数据表
173-5-K1	ETC	获取价格	CURRENT TRANSFORMER 60/5A
173-5-M5	ETC	获取价格	STROMWANDLER
173-5-R5	ETC	获取价格	STROMWANDLER
173-5-S5	ETC	获取价格	STROMWANDLER
173-5-T5	ETC	获取价格	CURRENT TRANSFORMER 400/5A
173-5-W5	ETC	获取价格	CURRENT TRANSFORMER 600/5A
1736001	PHOENIX	获取价格	Modular Terminal Block, 12A, 1 Row(s), 1 Deck(s)
1736014	PHOENIX	获取价格	Modular Terminal Block, 12A, 1 Row(s), 1 Deck(s)
1736023	PHOENIX	获取价格	Barrier Strip Terminal Block
1736027	PHOENIX	获取价格	Strip Terminal Block, 12A, 1 Row(s), 1 Deck(s), ROHS COMPLIANT

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