LTC3589EUJ(RevB) Ver la hoja de datos (PDF) - Linear Technology

Número de pieza

componentes Descripción

Fabricante

LTC3589EUJ
(Rev.:RevB)

8-Output Regulator with Sequencing and I2C

Linear Technology 

LTC3589

TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.8V, TA = 25°C, unless otherwise noted.

Buck-Boost Switching Regulator

Soft-Start

1V/DIV

VOUT

500mA/DIV

IL

Dynamic Voltage Slew

1V/DIV

5V/DIV

5V/DIV

VOUT

PGOOD

VSTB

100µs/DIV

3589 G19

200µs/DIV

VRRCR = 1.75mV/µs

Step-Down Switching Regulator 1

Load Step

PULSE-SKIPPING MODE

50mV/DIV

VOUT

3589 G20

ILOAD

1A/DIV

40µs/DIV

LOAD CAPACITANCE = 44µF

3589 G21

Step-Down Switching Regulator 1

Load Step

Buck-Boost Switching Regulator 1

Load Step

Burst Mode OPERATION

50mV/DIV

VOUT

200mV/DIV

VOUT

ILOAD

1A/DIV

40µs/DIV

LOAD CAPACITANCE = 44µF

3589 G22

1A/DIV

ILOAD

40µs/DIV

LOAD CAPACITANCE = 22µF

3589 G23

LDO1 Dropout Voltage

vs Temperature

500

VLDO1 = 1.8V

400

300

VLDO1 = 3.3V

200

100

0

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

3589 G25

LDO1 Output Change vs VIN

0.5

VLDO1 = 25mA

0.0

–0.5

–1.0

–1.5

–2.0

2

VLDO1 = 1.2V

VLDO1 = 1.8V

VLDO1 = 2.8V

VLDO1 = 3.3V

3

4

5

VIN (V)

3589 G26

Maximum Buck-Boost Load

Current vs VIN

2.5

2.0

1.5

1.0

0.5

VOUT = 1.5V

VOUT = 3.3V

VOUT = 5V

0

2.5 3.0 3.5 4.0 4.5 5.0 5.5

VIN (V)

3589 G24

LDO1 Short-Circuit Current

vs Temperature

80

70

60

50

40

30

20

–50 –25

0 25 50 75 100 125 150

TEMPERATURE (°C)

3589 G27

3589fb

11

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