Datasheet > LT3436

LT3436

更新时间： 2023-12-20 18:46:27

品牌	Logo	应用领域
亚德诺 - ADI		开关稳压器
页数	文件大小	规格书
16页	180K
描述
3A、800kHz 升压型开关稳压器

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LT3436 数据手册

LT3436

3A, 800kHz Step-Up

Switching Regulator

DESCRIPTIO

FEATURES

The LT^®3436 is an 800kHz monolithic boost switching

regulator. A high efficiency 3A, 0.1Ω switch is included on

the die together with all the control circuitry required to

complete a high frequency, current-mode switching regu-

lator. Current-mode control provides fast transient re-

sponse and excellent loop stability.

■

Constant 800kHz Switching Frequency

■

Wide Operating Voltage Range: 3V to 25V

■

High Efficiency 0.1Ω/3A Switch

■

1.2V Feedback Reference Voltage

■

±2% Overall Output Voltage Tolerance

■

Uses Low Profile Surface Mount External

Components

New design techniques achieve high efficiency at high

switching frequencies over a wide operating range. A low

dropout internal regulator maintains consistent perfor-

manceoverawiderangeofinputsfrom24VsystemstoLi-

Ion batteries. An operating supply current of 1mA main-

tains high efficiency, especially at lower output currents.

Shutdown reduces quiescent current to 11µA. Maximum

switch current remains constant at all duty cycles. Syn-

chronizationcapabilityallowsanexternallogiclevelsignal

to increase the internal oscillator from 1MHz to 1.4MHz.

■

Low Shutdown Current: 11µA

■

Synchronizable from 1MHz to 1.4MHz

■

Current-Mode Control

■

Constant Maximum Switch Current Rating

at All Duty Cycles*

■

Available in a Small Thermally Enhanced

TSSOP-16 Package

APPLICATIO S

■

DSL Modems

Full cycle-by-cycle switch current limit protection and ther-

mal shutdown are provided. High frequency operation al-

lows the reduction of input and output filtering components

and permits the use of tiny chip inductors. The LT3436 is

available in an exposed pad, 16-pin TSSOP package.

■

Portable Computers

■

Battery-Powered Systems

Distributed Power

■

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

All other trademarks are the property of their respective owners.

*Protectd by U.S. Patents including 6535042, 6611131, 6498466

TYPICAL APPLICATIO

Efficiency vs Load Current

5V to 12V Boost Converter

= 5V

OUT

3.9µH

= 12V

B220A

OUTPUT

12V

INPUT

4.7µF

CERAMIC

†

0.9A

OPEN

HIGH

= ON

LT3436

90.9k

SHDN

SYNC GND

22µF

CERAMIC

10k

10nF

4.7k

MAXIMUM OUTPUT CURRENT IS SUBJECT TO THERMAL DERATING.

470pF

†

0.4

0.6 0.7

0.1 0.2 0.3

0.5

0.8

3436 TA01

LOAD CURRENT (A)

3436 TA01b

3436fa

12 3 4 5 6 7...16

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