Datasheet > LTC3407A-2

LTC3407A-2

更新时间： 2023-12-20 18:45:46

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
16页	274K
描述
双通道同步、800mA、2.25MHz降压型DC/DC稳压器

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中文翻译

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数据手册

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LTC3407A-2 数据手册

LTC3407A-2

Dual Synchronous 800mA,

2.25MHz Step-Down

DC/DC Regulator

DESCRIPTIO

FEATURES

The LTC^®3407A-2 is a dual, constant frequency, synchro-

nousstep-downDC/DCconverter. Intendedforlowpower

applications, it operates from a 2.5V to 5.5V input voltage

range and has a constant 2.25MHz switching frequency,

enabling the use of tiny, low cost capacitors and inductors

1mm or less in height. Each output voltage is adjustable

from 0.6V to 5V. Internal synchronous 0.35Ω, 1A power

switches provide high efficiency without the need for

external Schottky diodes.

■

High Efficiency: Up to 95%

■

Low Ripple (<35mV_PK-PK) Burst Mode Operation;

I_Q= 40μA

■

2.25MHz Constant Frequency Operation

■

No Schottky Diodes Required

■

Low R_DS(ON)Internal Switches: 0.35Ω

■

Current Mode Operation for Excellent Line

and Load Transient Response

Short-Circuit Protected

■

Low Dropout Operation: 100% Duty Cycle

A user selectable mode input is provided to allow the user

to trade-off ripple noise for low power efficiency. Burst

Mode^®operation provides the highest efficiency at light

loads, while Pulse Skip Mode provides the lowest ripple

noise at light loads.

■

Ultralow Shutdown Current: I_Q<1μA

■

Output Voltages from 5V down to 0.6V

■

Power-On Reset Output

■

Externally Synchronizable Oscillator

■

Optional External Soft-Start

■

To further maximize battery life, the P-channel MOSFETs

are turned on continuously in dropout (100% duty cycle),

and both channels draw a total quiescent current of only

40μA. In shutdown, the device draws <1μA.

, 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, 6580258, 6304066, 6127815, 6498466, 6611131.

Small Thermally Enhanced MSOP and 3mm × 3mm

DFN Packages

APPLICATIO S

■

PDAs/Palmtop PCs

■

Digital Cameras

■

Cellular Phones

Wireless and DSL Modems

■

TYPICAL APPLICATIO

1mm High 2.5V/1.8V at 800mA Step-Down Regulators

Efficiency/Power Loss Curve

100

2.5V

V = 2.5V

TO 5.5V

1.8V

100k

10μF

0.1

RUN/SS2

RUN/SS1

POR

MODE/SYNC

RESET

LTC3407A-2

0.01

0.001

0.0001

2.2μH

OUT2

= 2.5V

= 1.8V

OUT1

SW2

SW1

AT 800mA

22pF

887k

22pF

887k

= 3.3V

Burst Mode OPERATION

FB1

FB2

NO LOAD ON OTHER CHANNEL

GND

280k

442k

10μF

100

1000

LOAD CURRENT (mA)

3407A2 TA02

3407A2 TA01

3407a2f

12 3 4 5 6 7...16

中文翻译

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与LTC3407A-2相关器件

型号	品牌	获取价格	描述	数据表
LTC3407AB	Linear	获取价格	1.25A, 4MHz, Synchronous Step-Down DC/DC Converter
LTC3407AEDD	Linear	获取价格	暂无描述
LTC3407AEDD#PBF	Linear	获取价格	LTC3407A - Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator; Package: DFN; Pins: 1
LTC3407AEDD#TR	Linear	获取价格	IC 1.25 A DUAL SWITCHING CONTROLLER, 1800 kHz SWITCHING FREQ-MAX, PDSO10, 3 X 3 MM, PLASTI
LTC3407AEDD#TRPBF	Linear	获取价格	LTC3407A - Dual Synchronous 600mA, 1.5MHz Step-Down DC/DC Regulator; Package: DFN; Pins: 1
LTC3407AEDD-2	Linear	获取价格	Dual Synchronous 800mA,2.25MHz Step-Down DC/DC Regulator
LTC3407AEDD-2#PBF	Linear	获取价格	LTC3407A-2 - Dual Synchronous 800mA, 2.25MHz Step-Down DC/DC Regulator; Package: DFN; Pins
LTC3407AEDD-2#TR	Linear	获取价格	LTC3407A-2 - Dual Synchronous 800mA, 2.25MHz Step-Down DC/DC Regulator; Package: DFN; Pins
LTC3407AEDD-2#TRPBF	Linear	获取价格	暂无描述
LTC3407AEDD-2-PBF	Linear	获取价格	Dual Synchronous 800mA,2.25MHz Step-Down DC/DC Regulator

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