LTC3523-2 查看數據表（PDF） - Linear Technology

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产品描述 (功能)

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LTC3523-2

Synchronous 600mA Step-Up and 400mA Step-Down DC/DC Converters

Linear Technology 

LTC3523/LTC3523-2

TYPICAL APPLICATIONS

Li-Ion to 5V/150mA, 2.5V/200mA

VIN

2.5V TO 4.2V

+

Li-Ion

VOUT1

STEP-UP

OUTPUT

5V

150mA

10μF

4.7μF

10μH

VIN1 VIN2 VBAT

SW1

SW2

4.7μH

768k

VOUT LTC3523

FB2

FB1

MODE VIN

PGOOD1

PGOOD2

243k

SHDN1

SHDN2

GND1 GND2 GND3

10pF 768k

243k

OFF ON

OFF ON 3523 TA03

10μF

VOUT2

STEP-DOWN

OUTPUT

2.5V

200mA

100

90

80

70

60

50

40

30

20

10

0

0

Efficiency and Power Loss

vs Load Current

EFFICIENCY

1000

100

P0WER

LOSS

10

VIN = 3.6V

VOUT1 = 5V

VOUT2 = 2.5V 1

fOSC = 1.2MHz

STEP-UP

STEP-DOWN

0

1

10

100

1000

LOAD CURRENT (mA)

3523 TA03b

3523fb

14

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