Datasheet > LTC3605

LTC3605

更新时间： 2023-12-20 18:46:33

品牌	Logo	应用领域
亚德诺 - ADI		稳压器
页数	文件大小	规格书
22页	557K
描述
15V、5A、同步降压型稳压器

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LTC3605 数据手册

LTC3605

15V, 5A Synchronous

Step-Down Regulator

FEATURES

DESCRIPTION

TheLTC^®3605isahighefficiency,monolithicsynchronous

buck regulator using a phase lockable controlled on-time

constantfrequency,currentmodearchitecture.PolyPhase

operationallowsmultipleLTC3605regulatorstorunoutof

phase while using minimal input and output capacitance.

The operating supply voltage range is from 15V down to

4V, making it suitable for dual lithium-ion battery inputs

as well as point of load power supply applications from

a 12V or 5V rail.

High Efﬁciency: Up to 96%

5A Output Current

4V to 15V V Range

Integrated Power N-Channel MOSFETs

(70mΩ Top and 35mΩ Bottom)

Adjustable Frequency 800kHz to 4MHz

PolyPhase^®Operation (Up to 12 Phases)

Output Tracking

0.6V 1% Reference Accuracy

Current Mode Operation for Excellent Line and Load

Transient Response

Shutdown Mode Draws Less Than 15µA Supply Current

Available in 24-Pin (4mm × 4mm) QFN Package

AEC-Q100 Qualiﬁed for Automotive Applications

Theoperatingfrequencyisprogrammablefrom800kHzto

4MHz with an external resistor. The high frequency capa-

bility allows the use of small surface mount inductors. For

switching noise sensitive applications, it can be externally

synchronized from 800kHz to 4MHz. The PHMODE pin

allows user control of the phase of the outgoing clock

signal. The unique constant frequency/controlled on-time

architecture is ideal for high step-down ratio applications

that are operating at high frequency while demanding

fast transient response. Two internal phase-lock loops

synchronize the internal oscillator to the external clock

and also servos the regulator on-time to lock on to either

the internal clock or the external clock if it’s present.

APPLICATIONS

Point of Load Power Supply

Portable Instruments

Distributed Power Systems

Battery-Powered Equipment

All registered trademarks and trademarks are the property of their respective owners. Protected

by U.S. patents, including 5481178, 5847554, 6580258, 6304066, 6476589, 6774611.

TYPICAL APPLICATION

Efficiency and Power Loss

High Efficiency 1MHz, 5A Step-Down Regulator

100

= 12V

f = 1MHz

= 3.3V

OUT

4V TO 15V

22µF

×2

CLKOUT INTV

= 1.2V

OUT

2.2µF

1µH

CLKIN

BOOST

PGOOD

0.1µF

LTC3605

OUT

= 3.3V

OUT

= 1.2V

3.3V

OUT

11.5k

2.55k

47µF

RUN

×2

ITH

16k

0.1

10000

PGND

100

1000

162k

220pF

OUTPUT CURRENT (mA)

3605 TA01a

3605 TA01b

Rev. I

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