3

LTC1772

Reference Voltage

vs Temperature

Undervoltage Lockout Trip

Voltage vs Temperature

Shutdown Threshold

vs Temperature

vs Duty Cycle

Normalized Oscillator Frequency

vs Temperature

serves as the error amplifier compensation point as well as

the run control input. The current comparator threshold

increases with this control voltage. Nominal voltage range

for this pin is 0.7V to 1.9V. Forcing this pin below 0.35V

causes the device to be shut down. In shutdown all

functions are disabled and the PGATE pin is held high.

GND (Pin 2): Ground Pin.

nal resistive divider across the output.

parator.

Pin 2.

PGATE (Pin 6): Gate Drive for the External P-Channel

TEMPERATURE (

°C)

–55

775

780

790

795

800

825

810

–15

25

45

125

1772 G01

785

815

820

805

–35

5

65

85 105

TEMPERATURE (

°C)

–55

–10

–8

–4

–2

0

10

4

–15

25

45

125

1772 G02

–6

6

8

2

–35

5

65

85 105

TEMPERATURE (

°C)

–55

1.84

1.88

1.96

2.00

2.04

2.24

2.12

–15

25

45

125

1772 G03

1.92

2.16

2.20

2.08

–35

5

65

85 105

DUTY CYCLE (%)

20

30

100

1772 G04

40

50

60

70

80

90

130

120

110

100

90

80

70

60

50

TEMPERATURE (

°C)

–55

200

240

320

360

400

600

480

–15

25

45

125

1772 G05

280

520

560

440

–35

5

65

85 105