LTC3219 datasheet(4/20 Pages) LINER

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LTC3219

3219fa

TYPICAL PERFORMANCE CHARACTERISTICS

Mode Switch Dropout Times

VCPO

1V/DIV

200μs/DIV

3219 G01

VBAT = 3.6V

1.5x

VCPO

20mV/DIV

AC COUPLED

500ns/DIV

3219 G03

VBAT = 3.6V

ICPO = 100mA

CCPO = 2.2μF

1.5x Mode CPO Ripple

2x Mode CPO Ripple

1x Mode Switch Resistance vs

Temperature

1.5x Mode Charge Pump Open-Loop

Output Resistance vs Temperature

(1.5VBAT – VCPO)/ICPO

TEMPERATURE (°C)

–40

1.00

1.10

1.20

3219 G04

0.90

0.80

0.95

1.05

1.15

0.85

0.75

0.70

–15

ICPO = 100mA

VBAT = 3.3V

VBAT = 3.9V

VBAT = 3.6V

TEMPERATURE (°C)

–40

5.50

6.00

6.50

3219 G05

5.00

4.50

5.25

5.75

6.25

4.75

4.25

4.00

–15

VBAT = 3V

VCPO = 4.2V

C2 = C3 = 1μF

C4 = 2.2μF

1.5x Mode CPO Voltage

vs ICPO

ICPO (mA)

3.6

3.8

4.0

4.2

4.4

4.6

4.8

100

150

200

3219 G06

250

C4 = 2.2μF

C2 = C3 = 1μF

VBAT = 3.6V

3.5V

3.0V

3.3V

3.2V

3.1V

3.4V

2x Mode Charge Pump Open-Loop

Output Resistance vs Temperature

(2VBAT – VCPO)/ICPO

2x Mode CPO Voltage

vs ICPO

TEMPERATURE (°C)

–40

6.50

7.00

7.50

3219 G07

6.00

5.50

6.25

6.75

7.25

5.75

5.25

5.00

–15

VBAT = 3V

VCPO = 4.8V

C2 = C3 = 1μF

C4 = 2.2μF

ICPO (mA)

4.2

4.4

4.6

4.8

100

150

200

3219 G08

250

5.0

5.2

4.3

4.5

4.7

4.9

5.1

300

C4 = 2.2μF

C2 = C3 = 1μF

VBAT = 3.6V

3.0V

3.3V

3.2V

3.1V

3.5V

3.4V

Oscillator Frequency

vs VBAT Voltage

VBAT VOLTAGE (V)

2.7

775

800

825

850

875

3.1

3.5

3.9

4.3

3219 G09

4.7

5.1

5.5

TA = –40°C

TA = 85°C

TA = 25°C

TA = 25°C unless otherwise noted.

VCPO

20mV/DIV

AC COUPLED

500ns/DIV

3219 G02

VBAT = 3.6V

ICPO = 100mA

CCPO = 2.2μF

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