LTC1430AI datasheet(3/24 Pages) LINER

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LTC1430A

VCC = 5V, TA = 25°C (Note 2) unless otherwise noted.

ELECTRICAL CHARACTERISTICS

LTC1430AC

LTC1430AI

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

MIN

TYP

MAX

UNITS

VIH

SHDN Input High Voltage

2.4

VIL

SHDN Input Low Voltage

0.8

IIN

SHDN Input Current

±0.1 ±1

µA

gmV

Error Amplifier Transconductance

350

650

1100

300

650

1200

µmho

gmI

ILIM Amplifier Transconductance

(Note 4)

2400

µmho

Error Amplifier Open-Loop Gain

(Note 5)

IMAX

IMAX Sink Current

VI(MAX) = VCC

µA

ISS

Soft Start Source Current

VSS = 0V

–8

–12

– 16

–8

–12

– 17

µA

tr, ts

Driver Rise/Fall Time

Figure 3, PVCC1 = PVCC2 = 5V

250

tNOV

Driver Non-Overlap Time

Figure 3, PVCC1 = PVCC2 = 5V

130

250

130

250

DCMAX

Maximum Duty Cycle

Figure 3, VCOMP = VCC,

93.5

VFB = 1.265V

The q denotes specifications which apply over the full operating

temperature range.

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

of a device may be impaired.

Note 2: All currents into device pins are positive; all currents out of device

pins are negative. All voltages are referenced to ground unless otherwise

specified.

Note 3: Supply current in normal operation is dominated by the current

needed to charge and discharge the external FET gates. This will vary with

the LTC1430A operating frequency, operating voltage and the external

FETs used.

Note 4: The ILIM amplifier can sink but cannot source current. Under

normal (not current limited) operation, the ILIM output current will be zero.

Note 5: The open-loop DC gain and transconductance from the FB pin

(SENSE + and SENSE – floating) to COMP pin will be AV and gmV

respectively.

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