LTC1772B

3

1772bfa

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

(Note 5)

10

50

nA

Overvoltage Protect Threshold

0.820

0.860

0.895

V

Overvoltage Protect Hysteresis

20

mV

Oscillator Frequency

500

550

120

650

kHz

kHz

Gate Drive Rise Time

40

ns

Gate Drive Fall Time

40

ns

Peak Current Sense Voltage

(Note 6)

105

mV

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LTC1772BE is guaranteed to meet specifications from 0°C to

85°C. Specifications over the –40°C to 85°C operating temperature range

are assured by design, characterization and correlation with statistical

process controls. The LTC1772BI is guaranteed to meet specifications over

the full –40°C to 85°C operating temperature range.

Note 4: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

output of the error amplifier.

Note 6: Peak current sense voltage is reduced dependent on duty cycle to

a percentage of value as given in Figure 2.