Datasheet > 1765EFE-3.3

1765EFE-3.3

更新时间： 2024-11-11 12:33:55

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	195K
描述
Monolithic 3A, 1.25MHz Step-Down Switching Regulator

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1765EFE-3.3 数据手册

LT1765/LT1765-1.8/LT1765-2.5/

LT1765-3.3/LT1765-5

Monolithic 3A, 1.25MHz

Step-Down Switching Regulator

FEATURES

DESCRIPTION

The LT^®1765 is a 1.25MHz monolithic buck switching

regulator. A high efﬁciency 3A, 0.09Ω switch is included

on the die together with all the control circuitry required

to construct a high frequency, current mode switching

regulator. Current mode control provides fast transient

response and excellent loop stability.

3A Switch in a Thermally Enhanced 16-Lead

TSSOP or 8-Lead SO Package

Constant 1.25MHz Switching Frequency

Wide Operating Voltage Range: 3V to 25V

High Efﬁciency 0.09Ω Switch

1.2V Feedback Reference Voltage

Uses Low Proﬁle Surface Mount Components

New design techniques achieve high efﬁciency at high

switching frequencies over a wide operating voltage

range. A low dropout internal regulator maintains con-

sistent performance over a wide range of inputs from

24V systems to Li-Ion batteries. An operating supply

current of 1mA improves efﬁciency, especially at lower

output currents. Shutdown reduces quiescent current to

15μA. Maximum switch current remains constant at all

duty cycles. Synchronization allows an external logic level

signal to increase the internal oscillator into the range of

1.6MHz to 2MHz.

Low Shutdown Current: 15μA

Synchronizable to 2MHz

Current Mode Loop Control

Constant Maximum Switch Current Rating at

All Duty Cycles*

Available in 8-Lead SO and 16-Lead Thermally

Enhanced TSSOP Packages

APPLICATIONS

DSL Modems

Full cycle-by-cycle current control and thermal shutdown

are provided. High frequency operation allows the reduc-

tion of input and output ﬁltering components and permits

the use of chip inductors.

Portable Computers

Regulated Wall Adapters

Battery-Powered Systems

Distributed Power

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

*Patent Pending

TYPICAL APPLICATION

5V to 3.3V Step-Down Converter

Efﬁciency vs Load Current

CMDSH-3

= 10V

OUT

= 5V

0.18μF

1.5μH

OUTPUT

3.3V

BOOST

INPUT

2.5A

2.2μF

CERAMIC

LT1765-3.3

OFF ON

SHDN

SYNC GND

4.7μF

CERAMIC

2.2nF

UPS120

1765 TA01

1.0

1.5

2.0

0.5

SWITCH CURRENT (A)

1765 • TAO1a

1765fd

12 3 4 5 6 7...20

中文翻译

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与1765EFE-3.3相关器件

型号	品牌	获取价格	描述	数据表
1765EFE-5	Linear	获取价格	Monolithic 3A, 1.25MHz Step-Down Switching Regulator
1766019	PHOENIX	获取价格	Barrier Strip Terminal Block,
1766022	PHOENIX	获取价格	Barrier Strip Terminal Block,
1766042	PHOENIX	获取价格	Strip Terminal Block, 12A, 1 Row(s), 1 Deck(s), ROHS COMPLIANT
1766048	PHOENIX	获取价格	Barrier Strip Terminal Block,
1766055	PHOENIX	获取价格	Strip Terminal Block, 12A, 1 Row(s), 1 Deck(s), ROHS COMPLIANT
1766064	PHOENIX	获取价格	Barrier Strip Terminal Block, 8A, 1.5mm2
1766068	PHOENIX	获取价格	Strip Terminal Block, 12A, 1 Row(s), 1 Deck(s), ROHS COMPLIANT
1766071	PHOENIX	获取价格	Strip Terminal Block, 12A, 1 Row(s), 1 Deck(s), ROHS COMPLIANT
1766080	PHOENIX	获取价格	Barrier Strip Terminal Block,

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