4

LTC4007

4007i

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

of a device may be impaired.

Note 2: See Test Circuit.

Note 3: Does not include tolerance of current sense resistor or current

programming resistor.

Note 4: The LTC4007E is guaranteed to meet performance specifications

from 0

°C to 70°C. Specifications over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Low Logic Level of ACP, CHG, FLAG, LOBAT,

q

0.5

V

q

2.7

V

Off State Leakage Current of ACP, FLAG, FAULT

–1

1

µA

V = 0V

–10

µA

Timer Defeat Threshold at CHG

1

V

Programming Inputs (CHEM and 3C4C)

High Logic Level

q

3.3

V

Low Logic Level

q

1V

Pull-Up Current

V = 0V

– 14

µA

Oscillator

Regulator Switching Frequency

255

300

345

kHz

Regulator Switching Frequency in Drop Out

Duty Cycle

≥ 98%

20

25

kHz

Regulator Maximum Duty Cycle

98

99

%

Gate Drivers (TGATE, BGATE)

50

mV

4.5

5.6

10

V

4.5

5.6

10

V

50

mV

TGATE Transition Time

TGTR

TGATE Rise Time

50

110

ns

TGTF

TGATE Fall Time

50

100

ns

BGATE Transition Time

BGTR

BGATE Rise Time

40

90

ns

BGTF

BGATE Fall Time

40

80

ns

100

mV

100

mV