LTC1702AIGN datasheet(3/36 Pages) LINER

3 / 36 page

LTC1702A

1702afa

ELECTRICAL CHARACTERISTICS

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: PVCC and BVCC (VBOOST – VSW) must be greater than VGS(ON) of

the external MOSFETs used to ensure proper operation.

Note 3: 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 4: Supply current in normal operation is dominated by the current

needed to charge and discharge the external MOSFET gates. This current

will vary with supply voltage and the external MOSFETs used.

Note 5: Supply current in shutdown is dominated by external MOSFET

leakage and may be significantly higher than the quiescent current drawn

by the LTC1702A, especially at elevated temperature.

Note 6: This parameter is guaranteed by correlation and is not tested

directly.

Note 7: Rise and fall times are measured using 10% and 90% levels. Delay

and nonoverlap times are measured using 50% levels.

The

● denotes specifications which apply over the full operating temperature range, otherwise specifications are TA = 25°C.

VCC = 5V unless otherwise specified. (Note 3)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VFCB

FCB Threshold

●

0.75

0.8

0.85

∆VFCB

FCB Feedback Hysteresis

IFCB

FCB Pin Current

●

±0.001

±1

µA

VRUN

RUN/SS Pin RUN Threshold

●

0.45

0.55

0.65

ISS

Soft-Start Source Current

RUN/SS

n = 0V

–2

–3.5

–6

µA

Maximum Soft-Start Sink Current

VIMAX = 0V, VSW = – 0.5V

IMAX

IMAX Source Current

VIMAX = 0V

●

–12

–10

– 8

µA

Switching Characteristics

fOSC

Oscillator Frequency

Test Circuit 1, CL = 0pF

●

475

550

750

kHz

ΦOSC2

Converter 2 Oscillator Phase

Relative to Converter 1 (Note 6)

180

DEG

DCMIN

Minimum Duty Cycle

●

DCMAX

Maximum Duty Cycle

●

tNOV

Driver Nonoverlap

Test Circuit 1, CL = 2000pF (Note 7)

●

100

tr, tf

Driver Rise/Fall Time

Test Circuit 1, CL = 2000pF (Note 7)

●

Feedback Amplifier

AVFB

FB DC Gain

●

GBW

FB Gain Bandwidth

MHz

IERR

FB Sink/Source Current

●

±3

±10

Status Outputs

VPGOOD

PGOOD Trip Point

VFB Relative to Regulated VOUT

●

–10

– 5

– 2

VOLPG

PGOOD Output Low Voltage

PGOOD = 1mA

●

0.03

0.1

IPGOOD

PGOOD Output Leakage

●

±0.1

±1

µA

tPGOOD

PGOOD Delay Time

VFB < VPGOOD to PGOOD

(Note 7)

100

µs

VFAULT

FAULT Trip Point

VFB Relative to Regulated VOUT

●

VOLF

FAULT Output Low Voltage

IFAULT = 1mA

●

0.03

0.1

IFAULT

FAULT Output Current

VFAULT = 0V

–10

µA

tFAULT

FAULT Delay Time

VFB > VFAULT to FAULT

(Note 7)

µs

LTC1702AIGN 数据表(PDF) 3 Page - Linear Technology

LTC1702AIGN 数据表(HTML) 3 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36

数据表下载