ltc3608ewkg Linear Technology Corporation, ltc3608ewkg Datasheet

ltc3608ewkg

Manufacturer Part Number

ltc3608ewkg

Description

18v, 8a Monolithic Synchronous Step-down Dc/dc Converter

Manufacturer

Linear Technology Corporation

Datasheet

1.LTC3608EWKG.pdf (24 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Meier Automation Equipment Co., Limited

Part Number:

LTC3608EWKG

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Meier Automation Equipment Co., Limited

Part Number:

ltc3608ewkg#PBF

Manufacturer:

LINEAR/凌特

Quantity:

20 000

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

ltc3608ewkg#PBF/I

Manufacturer:

Quantity:

3 000

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FEATURES

APPLICATIONS

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

trademarks are the property of their respective owners. Protected by U.S. Patents including

5481178, 6100678, 6580258, 5847554, 6304066.

TYPICAL APPLICATION

8A Output Current

Wide V

Internal N-Channel MOSFETs

True Current Mode Control

Optimized for High Step-Down Ratios

Extremely Fast Transient Response

Stable with Ceramic C

±1% 0.6V Voltage Reference

Power Good Output Voltage Monitor

Adjustable On-Time/Switching Frequency

Adjustable Current Limit

Programmable Soft-Start

Output Overvoltage Protection

Optional Short-Circuit Shutdown Timer

Low Shutdown I

Available in a 7mm × 8mm 52-Lead QFN Package

Point of Load Regulation

Distributed Power Systems

ON(MIN)

1500pF

0.1μF

100pF

11.3k

OUT

≤ 100nsec

High Efﬁ ciency Step-Down Converter

Range = 4V to 18V

RUN/SS

SGND

PGOOD

EXTV

RNG

LTC3608

: 15μA

INTV

BOOST

PGND

3608 TA01a

FCB

OUT

187k

0.22μF

4.7μF

0.8μH

30.1k

9.53k

10μF

×3

100μF

×2

4V TO 18V

2.5V

OUT

DESCRIPTION

The LTC

step-down DC/DC converter that can deliver up to 8A output

current from a 4V to 18V (20V maximum) input supply. It

uses a valley current control architecture to deliver very

low duty cycle operation at high frequency with excellent

transient response. The operating frequency is selected

by an external resistor and is compensated for variations

in V

The LTC3608 can be conﬁ gured for discontinuous or

forced continuous operation at light load. Forced continu-

ous operation reduces noise and RF interference while

discontinuous mode provides high efﬁ ciency by reducing

switching losses at light loads.

Fault protection is provided by internal foldback current

limiting, an output overvoltage comparator and an optional

short-circuit shutdown timer. Soft-start capability for sup-

ply sequencing is accomplished using an external timing

capacitor. The regulator current limit is user programmable.

A power good output voltage monitor indicates when

the output is in regulation. The LTC3608 is available in a

compact 7mm × 8mm QFN package.

Synchronous Step-Down

and V

3608 is a high efﬁ ciency, monolithic synchronous

OUT

100

0.01

18V, 8A Monolithic

Efﬁ ciency and Power Loss

DC/DC Converter

EFFICIENCY

vs Load Current

0.1

LOAD CURRENT (A)

POWER LOSS

EXTV

OUT

= 2.5V

3608 TA01b

= 12V

= 5V

LTC3608

10000

1000

100

3608fa

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