LTC3446 datasheet(6/20 Pages) LINER

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LTC3446

3446fd

TYPICAL PERFORMANCE CHARACTERISTICS

Peak Inductor Current

vs ITH Voltage

VLDO Current Limit

vs LVIN Voltage

VLDO Dropout Voltage

vs Load Current

VIN Bias Current

vs VLDO Load Current

LVIN No-Load Operating Current

Enable/MODESEL Thresholds

ITH PIN VOLTAGE (V)

0.8

1.2

3446 G07

0.4

0.5

1.5

0.25

0.75

1.25

1.75

1.6

VIN = 3.6V

VMODESEL = 3.6V

0.6

1.0

0.2

1.4

LVIN PIN VOLTAGE (V)

0.00

200

600

800

1000

4.00

1800

3446 G08

400

2.00

1.00

5.00

3.00

6.00

1200

1400

1600

VIN = 3.6V

LVOUT = 0V

PULSED MEASUREMENT,

TJ ≈ TA ≈ 27°C

LOAD CURRENT (mA)

100

150

200

3446 G09

250

100

300

–45°C

27°C

90°C

130°C

VIN = 2.8V

LVOUT = 1.2V

VLDO OUTPUT CURRENT (mA)

150

200

250

200

450

3446 G10

100

250

150

300

350

400

–45°C

27°C

90°C

130°C

VIN = 3.6V

LVIN = 1.5V

LVOUT = 1.2V

ONLY ONE VLDO

ENABLED

LVIN PIN VOLTAGE (V)

3446 G11

VIN = 5V

BOTH VLDOS ON AND

REGULATING 0.8V

–45°C

27°C

90°C

130°C

VIN (V)

2.5

200

400

600

3.5

4.5

3446 G12

800

1000

100

300

500

700

900

5.5

–45°C

27°C

90°C

130°C

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