LTC3545 datasheet(4/20 Pages) LINER

номер детали	LTC3545

подробное описание детали	Triple 800mA Synchronous Step-Down Regulator-2.25MHz

PDF	20 Pages

Scroll/Zoom	100%

производитель	LINER [Linear Technology]

домашняя страница	http://www.linear.com

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LTC3545/LTC3545-1

35451fb

Burst Mode Operation

Efﬁciency vs Supply Voltage

Supply Current vs Temperature

Burst Mode Operation

TYPICAL PERFORMANCE CHARACTERISTICS

VREF vs Temperature at 2.25V,

3.6V, 5.5V

Switching Frequency vs Supply

Voltage and Temperature

Load Regulation, All Channels

TEMPERATURE (°C)

–50

0.585

0.590

0.595

0.600

0.605

0.610

0.615

150

100

3545 G01

2.25V

3.6V

5.5V

SUPPLY VOLTAGE (V)

1.5

2.0

2.5

3.0

3545 G02

fOSC = –40°C

fOSC = 0°C

fOSC = 25°C

fOSC = 80°C

LOAD CURRENT (mA)

0.6

0.8

1.2

600

3545 G03

0.4

0.2

200

400

800

–0.4

–0.2

1.0

CHANNEL 1

CHANNEL 2

CHANNEL 3

TA = 25°C

VIN = 3.6V

UNTESTED CHANNELS OFF

PULSE SKIP MODE

1μs/DIV

2V/DIV

100mA/DIV

VOUT

20mV/DIV

3545 G04

VIN = 3.6V

VOUT = 1.8V

ILOAD = 50mA

fOSC = 2.25MHz

SUPPLY VOLTAGE (V)

3545 G05

100

VOUT = 2V

TA = 25°C

CHANNEL 3, ALL OTHERS OFF

fOSC = 2.25MHz

ILOAD = 250mA

TEMPERATURE (°C)

3545 G06

VIN = 5.5V

VIN = 4.5V

VIN = 3.5V

VIN = 2.5V

VFB3 = 0.625V

ILOAD = 0mA

CHANNEL 3 ONLY

–50

150

100

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