LT1073

3

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: This specification guarantees that both the high and low trip point

of the comparator fall within the 202mV to 222mV range.

Note 3: This specification guarantees that the output voltage of the fixed

versions will always fall within the specified range. The waveform at the

SENSE pin will exhibit a sawtooth shape due to the comparator hysteresis.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reverse Battery Current

(Note 5)

750

mA

Current Limit

220

400

mA

Current Limit Temperature Coefficient

–0.3

%/

°C

Switch OFF Leakage Current

Measured at SW1 Pin

1

10

µA

Maximum Excursion Below GND

–400

–350

mV

Note 4: 100k resistor connected between a 5V source and the AO pin.

Note 5: The LT1073 is guaranteed to withstand continuous application of

grounded.

TYPICAL PERFOR A CE CHARACTERISTICS

Saturation Voltage Step-Up Mode

(SW2 Pin Grounded)

Switch ON Voltage Step-Down Mode

0

1.2

1.0

0.8

0.6

0.4

0.2

0

0.2

0.4

0.6

0.8

1073 G01

1.0

1.2

0

0.6

1073 G02

0.2

0.4

0.8

1.4

1.3

1.2

1.1

1.0

0.9

0.8

0.7

0.1

0.3

0.5

0.7

10

1200

1100

1000

900

800

700

600

500

400

300

200

100

100

1000

1073 G03

L = 82

µH

FB Pin Bias Current vs

Temperature

SET Pin Bias Current vs

Temperature

“Gain Block” Gain

TEMPERATURE (

°C)

–50

100

1073 G04

050

20

18

16

14

12

10

8

6

4

–25

25

75

125

TEMPERATURE (

°C)

–50

100

1073 G05

050

200

175

150

125

100

75

50

25

0

–25

25

75

125

TEMPERATURE (

°C)

–50

100

1073 G06

050

1800

1600

1400

1200

1000

800

600

400

200

0

–25

25

75

125