LTC3124 판매점 - 5A 2-Phase Synchronous Step-Up DC/DC Converter

LTC3124 반도체 회로 부품 판매점

5A 2-Phase Synchronous Step-Up DC/DC Converter

Linear Technology

LTC3124

15V, 5A 2-Phase Synchronous

Step-Up DC/DC Converter with

Output Disconnect

FEATURES

n VIN Range: 1.8V to 5.5V, 500mV After Start-Up

n Adjustable Output Voltage: 2.5V to 15V

n 1.5A Output Current for VIN = 5V and VOUT = 12V

n Dual-Phase Control Reduces Output Voltage Ripple

n Output Disconnects from Input When Shut Down

n Synchronous Rectification: Up to 95% Efficiency

n Inrush Current Limit

n Up to 3MHz Programmable Switching Frequency

Synchronizable to External Clock

n Selectable Burst Mode® Operation: 25µA IQ

n Output Overvoltage Protection

n Internal Soft-Start

n <1µA IQ in Shutdown

n 16-Lead, Thermally- Enhanced 3mm × 5mm ×

0.75mm DFN and TSSOP Packages

APPLICATIONS

n RF, Microwave Power Amplifiers

n Piezo Actuators

n Small DC Motors, Thermal Printers

n 12V Analog Rail from Battery, 5V, or Backup Capacitor

L, LT, LTC, LTM, Burst Mode, Linear Technology and the Linear logo are registered trademarks

and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the

property of their respective owners.

DESCRIPTION

The LTC®3124 is a dual-phase, synchronous step-up DC/

DC converter with true output disconnect and inrush

current limiting capable of providing output voltages up

to 15V. Dual-phase operation significantly reduces peak

inductor and capacitor ripple currents, minimizing induc-

tor and capacitor size. The 2.5A per phase current limit,

along with the ability to program output voltages up to 15V

make the LTC3124 well suited for a variety of demanding

applications. Once started, operation will continue with

inputs down to 500mV.

The LTC3124 switching frequency can be programmed

from 100kHz to 3MHz to optimize applications for highest

efficiency or smallest solution footprint. The oscillator can

be synchronized to an external clock for noise sensitive

applications. Selectable Burst Mode operation reduces

quiescent current to 25µA, ensuring high efficiency across

the entire load range. An internal soft-start limits inrush

current during start-up.

Other features include a <1µA shutdown current and robust

protection under short-circuit,thermal overload,and output

overvoltage conditions. The LTC3124 is offered in both

16-lead DFN and thermally-enhanced TSSOP packages.

TYPICAL APPLICATION

5V to 12V Synchronous Boost Converter

VIN

4.7µH

SWB CAP

100nF

VOUT

4.7µH

PGNDB

SWA

VOUTB

VOUTA

22µF

×2

12V

1.5A

LTC3124

PGNDA

VIN SGND

BURST PWM

10µF

4.7µF

PWM/SYNC

VCC

28k

OFF ON

84.5k

680pF

1.02M

113k

56pF

3124 TA01a

Efficiency Curve

100

Burst Mode

OPERATION

70 PWM

0.1

0.01

Burst Mode

OPERATION

0.01

PWM

fSW = 1MHz 0.001

EFFICIENCY

POWER LOSS

0.0001

0.1 1 10 100 1000

LOAD CURRENT (mA)

3124 TA01b

For more information www.linear.com/LTC3124

3124f

LTC3124

ABSOLUTE MAXIMUM RATINGS (Note 1)

VIN Voltage.................................................... –0.3V to 6V

VOUTA, VOUTB Voltages................................ –0.3V to 18V

SWA, SWB Voltages (Note 2)...................... –0.3V to 18V

SWA, SWB (Pulsed < 100ns) (Note 2)........ –0.3V to 19V

VC Voltage...................................................–0.3V to VCC

RT Voltage...................................................–0.3V to VCC

CAP Voltage

VOUT < 5.7V.............................–0.3V to (VOUT + 0.3V)

5.7V ≤ VOUT ≤ 11.7V...... (VOUT – 6V) to (VOUT + 0.3V)

VOUT > 11.7V..................................(VOUT – 6V) to 12V

All Other Pins................................................ –0.3V to 6V

Operating Junction Temperature Range (Notes 3, 4)

LTC3124E/LTC3124I............................ –40°C to 125°C

LTC3124H........................................... –40°C to 150°C

Storage Temperature Range................... –65°C to 150°C

Lead Temperature (Soldering, 10 sec)

FE Package Only................................................ 300°C

PIN CONFIGURATION

TOP VIEW

SWB 1

PGNDB 2

SWA 3

PGNDA 4

VIN 5

PWM/SYNC 6

VCC 7

RT 8

PGND

16 CAP

15 VOUTB

14 NC

13 VOUTA

12 SGND

11 SD

10 FB

9 VC

DHC PACKAGE

16-LEAD (5mm × 3mm) PLASTIC DFN

TJMAX = 125°C, θJA = 43°C/W (NOTE 5), θJC = 5°C/W

EXPOSED PAD (PIN 17) IS PGND AND MUST BE SOLDERED TO PCB

FOR RATED THERMAL PERFORMANCE

TOP VIEW

SWB

PGNDB

SWA

PGNDA

VIN

PWM/SYNC

VCC

PGND

16 CAP

15 VOUTB

14 NC

13 VOUTA

12 SGND

11 SD

10 FB

9 VC

FE PACKAGE

16-LEAD PLASTIC TSSOP

TJMAX = 150°C, θJA = 40°C/W (NOTE 5), θJC = 10°C/W

EXPOSED PAD (PIN 17) IS PGND AND MUST BE SOLDERED TO PCB

FOR RATED THERMAL PERFORMANCE

ORDER INFORMATION

LEAD FREE FINISH

TAPE AND REEL

PART MARKING*

PACKAGE DESCRIPTION

TEMPERATURE RANGE

LTC3124EDHC#PBF

LTC3124IDHC#PBF

LTC3124EFE#PBF

LTC3124EDHC#TRPBF

LTC3124IDHC#TRPBF

LTC3124EFE#TRPBF

3124

3124FE

16-Lead (5mm × 3mm) Plastic DFN

16-Lead Plastic TSSOP

–40°C to 125°C

LTC3124IFE#PBF

LTC3124IFE#TRPBF

3124FE

16-Lead Plastic TSSOP

–40°C to 125°C

LTC3124HFE#PBF

LTC3124HFE#TRPBF

3124FE

16-Lead Plastic TSSOP

–40°C to 150°C

Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping

container.Consult LTC Marketing for information on non-standard lead based finish parts.

For more information on lead free part marking, go to: http://www.linear.com/leadfree/

For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/

3124f

2 For more information www.linear.com/LTC3124

PDF 파일 내의 페이지 : 총 28 페이지

제조업체: Linear Technology

( linear )

LTC3124 converter

데이터시트 다운로드 :

[ LTC3124.PDF ]

[ LTC3124 다른 제조사 검색 ]

국내 전력반도체 판매점

상호 : 아이지 인터내셔날

전화번호 : 051-319-2877

[ 홈페이지 ]

IGBT, TR 모듈, SCR, 다이오드모듈, 각종 전력 휴즈

( IYXS, Powerex, Toshiba, Fuji, Bussmann, Eaton )

전력반도체 문의 : 010-3582-2743

일반적인 전자부품 판매점

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엘레파츠

ICbanQ

Mouser Electronics

DigiKey Electronics

Element14

LTC3124 반도체 회로 부품 판매점

5A 2-Phase Synchronous Step-Up DC/DC Converter

국내 전력반도체 판매점

일반적인 전자부품 판매점

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