LTC3215 datasheet(4/12 Pages) LINER

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LTC3215

3215f

VIN (V)

2.8

100

3.2

3.6

3.8

3216 G11

3.0

3.4

4.0

4.2

4.4

LED = LXCL-PWF1 LUMILED

VF = 3V TYP AT 200mA

4.0

3.5

3.0

2.5

2.0

1.5

1.0

0.5

3216 G04

INPUT VOLTAGE (V)

2.9

4.5

3.3

3.7

4.1

3.1

3.5

3.9

4.3

TA = 85°C

TA = –40°C

TA = 25°C

930

920

910

900

890

880

870

860

850

840

3216 G03

SUPPLY VOLTAGE (V)

2.9

4.5

3.3

3.7

4.1

3.1

3.5

3.9

4.3

TA = 85°C

TA = –40°C

TA = 25°C

600mA

400mA

200mA

TYPICAL PERFOR A CE CHARACTERISTICS

Efficiency vs VIN

1.5x Mode CPO Output Ripple

2x Mode CPO Output Ripple

Input Shutdown Current

vs Input Voltage

Oscillator Frequency

vs Supply Voltage

Charge Pump Mode Switching

and Input Current (ILED = 400mA)

VCPO

1V/DIV

IVIN

500mA/

DIV

VIN = 3V

1ms/DIV

3215 G14

EN2

5V/DIV

3216 G12

VCPO

50mV/DIV

A/C COUPLED

500ns/DIV

VIN = 3.6V

ICPO = 200mA

3216 G13

VCPO

20mV/DIV

A/C COUPLED

500ns/DIV

VIN = 3.6V

ICPO = 400mA

Efficiency vs VIN

ISET/ILED Current Ratio

vs ILED Current

VIN (V)

2.8

100

3.2

3.6

3.8

3215 G15

3.0

3.4

4.0

4.2

4.4

AOT2015 HPW 1751B

VF = 3V TYP AT 100mA

100mA

200mA

400mA

ILED CURRENT (mA)

3100

3150

3200

3250

–40°C

25°C

85°C

3300

200

400

600

800

3215 G16

3350

3400

(TA = 25°C unless otherwise specified)

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