LT3467AIS67 Ver la hoja de datos (PDF) - Linear Technology

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componentes Descripción

Fabricante

LT3467AIS67

1.1A Step-Up DC/DC Converter with Integrated Soft-Start

Linear Technology 

LT3467/LT3467A

TYPICAL PERFORMANCE CHARACTERISTICS

Quiescent Current vs Temperature

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0

–40 –25 –10 5 20 35 50 65 80 95 110 125

TEMPERATURE (°C)

3467 G01

FB Pin Voltage vs Temperature

1.26

1.25

1.24

1.23

1.22

1.21

1.20

–40 –25 –10 5 20 35 50 65 80 95 110 125

TEMPERATURE (°C)

3467 G02

SHDN Current vs SHDN Voltage

140

TA = 25°C

120

100

80

60

40

20

0

0 2 4 6 8 10 12 14 16 18

VSHDN (V)

3467 G03

Current Limit vs Duty Cycle

2.0

1.8

TA = 25°C

1.6

TYPICAL

Switch Saturation Voltage

vs Switch Current

1.4

1.2

1.0

GUARANTEED

0.8

0.6

VCESAT

100mV/DIV

TA = 25°C

TA = 85°C

TA = –40°C

0.4

0.2

0

10 20 30 40 50 60 70 80 90

DC (%)

3467 G05

SW CURRENT 200mA/DIV

3467 G04

Oscillator Frequency

vs Temperature

2.50

2.25

LT3467A

2.00

1.75

1.50

LT3467

1.25

1.00

0.75

0.50

0.25

0

–50 –25 0

25 50 75 100

TEMPERATURE (°C)

3467 G06

Soft-Start Current

vs Soft-Start Voltage

6

TA = 25°C

5

4

3

2

Peak Switch Current

vs Soft-Start Voltage

2.0

TA = 25°C

1.8

1.6

1.4

1.2

1.0

0.8

0.6

Start-Up Waveform

(Figure 2 Circuit)

VSHDN

2V/DIV

VOUT

1V/DIV

0.4

1

ISUPPLY

0.2

0.5A/DIV

0

0 50 100 150 200 250 300 350 400 450 500

VSS (mV)

0

0 50 100 150 200 250 300 350 400 450 500

VSS (mV)

0.5ms/DIV

3467 G09

3467 G07

3467 G08

3467afe

4

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