LTC4091 datasheet(6/26 Pages) LINER

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LTC4091

4091fa

For more information www.linear.com/LTC4091

TYPICAL PERFORMANCE CHARACTERISTICS

Soft-Start

Minimum Switch On-Time

Switching Frequency

Switch Voltage Drop

Switch Current Limit

OUT During VIN Cold Crank

Histogram of VCHG

OUT During VIN Hot-Plug

Switch Current Limit

TA = 25°C, unless otherwise noted.

RUN/SS PIN VOLTAGE (V)

3.5

1.5

4091 G12

2.0

1.0

0.5

4.0

3.0

2.5

1.5

2.5

3.5

TEMPERATURE (°C)

100

120

4091 G13

140

–50

–25

75 100

150

125

TEMPERATURE (°C)

1.00

1.10

4091 G14

0.90

0.80

1.20

0.95

1.05

0.85

1.15

–50

–25

75 100

150

125

SWITCH CURRENT (mA)

400

500

700

1500

4091 G15

300

200

500

1000

2000

2500

100

600

DUTY CYCLE (%)

4091 G10

2.5

1.5

1.0

4.0

3.5

3.0

2.0

100

TEMPERATURE (°C)

2.0

2.5

3.5

3.0

4091 G11

1.5

1.0

0.5

4.5

4.0

DUTY CYCLE = 10 %

DUTY CYCLE = 90 %

–50

–25

75 100

150

125

1ms/DIV

BAT

CURRENT

1A/DIV

VOUT

1V/DIV

VIN

5V/DIV

4091 G16

►

BAT = 4.05V

1A OUT LOAD

100ms/DIV

VOUT

1V/DIV

VIN

5V/DIV

4091 G17

►

BAT = 3.5V

NO LOAD

4.158

4.179

4.200

4.221

4.242

CHARGE VOLTAGE (V)

120

180

240

300

4091 G18

σ = 0.11%

V4P1 = Open

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