LT3741 datasheet(1/32 Pages) LINER

部品番号	LT3741

部品情報	60V Synchronous 4-Switch Buck-Boost Controller with Spread Spectrum

PDF	32 Pages

Scroll/Zoom	100%

メーカー	LINER [Linear Technology]

ホームページ	http://www.linear.com

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1 / 32 page

LT8390

1

8390fa

For more information www.linear.com/LT8390

TYPICAL APPLICATION

FEATURES

DESCRIPTION

60V Synchronous 4-Switch

Buck-Boost Controller

with Spread Spectrum

TheLT®8390isasynchronous4-switchbuck-boostDC/DC

controller that regulates output voltage, input or output

current from an input voltage above, below, or equal to

the output voltage. The proprietary peak-buck/peak-boost

current mode control scheme allows adjustable and syn-

chronizable 150kHz to 650kHz fixed frequency operation,

or internal ±15% triangle spread spectrum frequency

modulation for low EMI. With a 4V to 60V input voltage

range,0Vto60Voutputvoltagecapability,andseamlesslow

noise transitions between operation regions, the LT8390

is ideal for voltage regulator, battery and supercapacitor

charger applications in automotive, industrial, telecom,

and even battery-powered systems.

The LT8390 provides input or output current monitor and

power good flag. Fault protection is also provided to detect

output short-circuit condition, during which the LT8390

retries, latches off, or keeps running.

98% Efficient 48W (12V 4A) Miniature Buck-Boost Voltage Regulator

APPLICATIONS

n

4-Switch Single Inductor Architecture Allows VIN

Above, Below or Equal to VOUT

n

Synchronous Switching: Up to 98% Efficiency

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Proprietary Peak-Buck Peak-Boost Current Mode

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Wide VIN Range: 4V to 60V

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±1.5% Output Voltage Accuracy: 1V ≤ VOUT ≤ 60V

n

±3% Input or Output Current Accuracy with Monitor

n

Spread Spectrum Frequency Modulation for Low EMI

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High Side PMOS Load Switch Driver

n

Integrated Bootstrap Diodes

n

No Top MOSFET Refresh Noise in Buck or Boost

n

Adjustable and Synchronizable: 150kHz to 650kHz

n

VOUT Disconnected from VIN During Shutdown

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Available in 28-Lead TSSOP with Exposed Pad and

28-Lead QFN (4mm × 5mm)

n

Automotive, Industrial, Telecom Systems

n

High Power Battery-Powered System

L

, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Analog

Devices, Inc. All other trademarks are the property of their respective owners.

Efficiency vs VIN

IOUT = 4A

INPUT VOLTAGE (V)

0

10

20

30

40

50

60

86

88

90

92

94

96

98

100

8390 TA01b

165k

0.1µF

4.7µF

4m

0.1µF

6uH

22µF

383k

4.7µF

100k

0.47µF

100k

4.7nF

27k

100k

9.09k

15m

10µF

25V

×2

0.1µF

1µF

100pF

120µF

16V

120µF

16V

EN/UVLO

VREF

CTRL

PGOOD

BG2

BST2

TG2

INTVCC

LOADEN

FB

VOUT

ISP

ISN

SYNC/SPRD

TEST

VIN

4V TO 56V

400kHz

63V

×2

100V

×2

ISMON

PGOOD

VOUT

12V

4A

LSP

LSN

SW1

SW2

BST1

TG1

BG1

VIN

LT8390

LOADTG

ISMON

SS

VC

RT

GND

SSFM OFF

SSFM ON

IOUT LIMIT 6.7A

8390 TA01a

同様の部品番号 - LT3741

メーカー	部品番号	データシート	部品情報
Linear Technology	LT3741	326Kb / 24P	High Power, Constant Current, Constant Voltage, Step-Down Controller
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	LT3741	477Kb / 40P	High Voltage High Current Controller for Battery Charging with Maximum Power Point Control
	LT3741-1	390Kb / 24P	High Power, Constant Current, Constant Voltage, Step-Down Controller

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