LTC3542 datasheet(4/16 Pages) AD

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LTC3542

3542fa

Start-Up from Shutdown

Load Step

Reference Voltage

vs Temperature

Oscillator Frequency

vs Temperature

Oscillator Frequency

vs Supply Voltage

Output Voltage vs Supply Voltage

Output Voltage vs Load Current

RDS(ON) vs Input Voltage

RUN

2V/DIV

500mA/DIV

VIN = 3.6V

VOUT = 1.8V

ILOAD = 500mA

FIGURE 3a CIRCUIT

400

μs/DIV

3542 G04

VOUT

1V/DIV

VOUT

100mV/DIV

AC COUPLED

500mA/DIV

VIN = 3.6V

VOUT = 1.8V

ILOAD = 30mA TO 500mA

FIGURE 3a CIRCUIT

μs/DIV

3542 G05

ILOAD

500mA/DIV

Load Step

VOUT

100mV/DIV

AC COUPLED

500mA/DIV

VIN = 3.6V

VOUT = 1.8V

ILOAD = 0mA TO 500mA

FIGURE 3a CIRCUIT

μs/DIV

3542 G06

ILOAD

500mA/DIV

TEMPERATURE (

°C)

–50

0.6100

0.6075

0.6050

0.6025

0.6000

0.5975

0.5950

0.5925

0.5900

0.5875

0.5850

0.5825

0.6125

0.6150

3542 G07

–25

100

125

INPUT VOLTAGE (V)

–0.5

–0.4

–0.2

–0.1

0.5

0.2

4.5

3542 G10

–0.3

0.3

0.4

0.1

2.5

3.5

5.5

VOUT = 1.8V

IOUT = 100mA

LOAD CURRENT (mA)

1.0

2.0

100

1000

3542 G11

–1.0

–0.5

0.5

1.5

–1.5

–2.0

Burst Mode

OPERATION

VIN = 3.6V

VOUT = 1.8V

PULSE SKIP

MODE

VIN (V)

0.1

0.3

0.4

0.5

0.9

3542 G12

0.2

0.6

0.7

0.8

SYNCHRONOUS

SWITCH

MAIN SWITCH

TEMPERATURE (

°C)

–50 –30 –10 10

90 110

1.8

1.9

2.1

2.2

2.3

2.7

3542 G08

2.0

2.4

2.5

2.6

SUPPLY VOLTAGE (V)

2.2

2.3

2.4

3542 G09

2.1

2.0

1.8

1.9

2.7

2.5

2.6

TYPICAL PERFORMANCE CHARACTERISTICS T

A = 25°C unless otherwise speciﬁed.

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