LTC3530EMS データシートの表示（PDF） - Linear Technology

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LTC3530EMS

Wide Input Voltage Synchronous Buck-Boost DC/DC Converter

Linear Technology 

LTC3530

TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise specified.

Automatic Burst Mode Threshold

vs RBURST

90

80

70

LEAVE Burst Mode

60

OPERATION

50

40

30

ENTER Burst Mode

20

OPERATION

10

0

125 175 225 275 325 375 425 475 500

RBURST (kΩ)

3530 G04

Minimum Start Voltage

vs Temperature

1.84

1.82

1.80

1.78

1.76

1.74

1.72

1.70

–45 –25 –5 15 35 55 75

TEMPERATURE (°C)

95 115

3530 G05

Frequency Change vs Temperature

1.25

1.23

1.21

1.19

1.17

1.15

1.13

1.11

1.09

1.07

1.05

–45 –25 –5 15 35 55 75 95 115

TEMPERATURE (°C)

3530 G07

Switch Pins in Buck-Boost Mode

Feedback Voltage vs Temperature

1.225

1.220

1.215

1.210

1.205

1.200

–45 –25 –5 15 35 55 75 95 115

TEMPERATURE (°C)

3530 G08

Switch Pins Entering

Buck-Boost Mode

Average Input Current Limit

vs Temperature

5%

VIN = VOUT = 3.3V

4%

3%

2%

1%

0%

–1%

–2%

–3%

–4%

–5%

–55 –35 –15 5 25 45 65 85 105 125

TEMPERATURE (°C)

3530 G06

Switch Pins Before Entering

Boost Mode

SW1

2V/DIV

SW2

2V/DIV

50ns/DIV

VIN = 2.9V

VOUT = 3.3V AT 500mA

3530 G09

LTC3530 Output Ripple

500mA Load

SW1

2V/DIV

SW2

2V/DIV

50ns/DIV

VIN = 3.3V

VOUT = 3.3V AT 500mA

SW1

2V/DIV

SW2

2V/DIV

3530 G10

50ns/DIV

VIN = 4.2V

VOUT = 3.3V AT 500mA

VIN = 2.7V

VIN = 3.3V

VIN = 4.2V

3530 G11

1μs/DIV

VOUT = 3.3V

20mV/DIV

AC COUPLED

COUT = 22μF, X5R CERAMIC

3530 G12

3530fb

4

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