LTC1700 datasheet(3/16 Pages) LINER

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LTC1700

SUPPLY VOLTAGE (V)

1.5

250

200

150

100

2.5

3.5 4.0

6.0

1700 G03

2.0

3.0

4.5 5.0 5.5

SUPPLY VOLTAGE (V)

1.5

2.5

3.5 4.0

6.0

1700 G02

2.0

3.0

4.5 5.0 5.5

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

TG Transition Time

TG tr

TG Gate Drive Rise Time

CLOAD = 3000pF, 10% to 90%

100

TG tf

TG Gate Drive Fall Time

CLOAD = 3000pF, 90% to 10%

100

BG Transition Time

BG tr

BG Gate Drive Rise Time

CLOAD = 3000pF, 10% to 90%

100

BG tf

BG Gate Drive Fall Time

CLOAD = 3000pF, 90% to 10%

Dead Time

tdll

BG and TG Gates Go Low

CLOAD = 3000pF on BG and TG

110

tdhh

BG and TG Gates Go High

CLOAD = 3000pF on TG and BG

ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VOUT = 3V unless otherwise specified.

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

of a device may be impaired.

Note 2: The LTC1700E 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.

Note 3: TJ is calculated from the ambient temperature TA and power

dissipation PD according to the following formula:

TJ = TA + (PD • 150°C/W)

Note 4: At an input supply less than 2.3V, only the start-up circuitry of the

LTC1700 is active. This test ensures the start-up circuitry is working.

Note 5: An input supply at or above this minimum operating voltage

activates the main control loop. Start-up circuitry of the LTC1700 is

shut off.

Note 6: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

Note 7: The LTC1700 is tested in a feedback loop that servos VFB to the

feedback point for the error amplifier (VITH = 0.6V)

TYPICAL PERFORMANCE CHARACTERISTICS

Reference Voltage vs

Temperature

Quiescent Current vs Supply

Voltage

Shutdown Current vs Supply

Voltage

TEMPERATURE (

°C)

–55

1.210

1.208

1.206

1.204

1.202

1.200

1.198

1.196

1.194

1.192

1.190

–15

125

1700 G01

–35

85 105

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