LTC2925IGN datasheet(3/20 Pages) LINER

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LTC2925

2925f

∆VCC(UVL, HYST) Input Supply Undervoltage Lockout Hysteresis

∆VGATE

External N-Channel Gate Drive (VGATE – VCC)IGATE = –1µA

5.5

IGATE

GATE pin current

Gate On, VGATE = 0V, No Faults

–7

–10

–13

µA

Gate Off, VGATE = 5V, No Faults

710

µA

Gate Off, VGATE = 5V,

520

Short-Circuit or Power Good Timeout

VON(TH)

ON Pin Threshold Voltage

VON rising

1.214

1.232

1.250

∆VON(HYST)

ON Pin Hysteresis

150

VON(FC)

ON Pin Fault Clear Threshold Voltage

0.3

0.4

0.5

ION(IN)

ON Pin Input Current

VON = 1.2V, VCC = 5.5V

±100

∆VRS-SENSE(TH) Sense Resistor Over-Current Voltage Threshold 1V < VSENSEP < VCC

(VSENSEP – VSENSEN)

0V < VSENSEP < 1V

ISENSEN

SENSEN Pin Input Current

0V < VSENSEN < VCC

–1

µA

ISENSEP

SENSEP Pin Input Current

0V < VSENSEP < VCC

–1

µA

VOS

Ramp Buffer Offset (VRAMPBUF – VRAMP)VRAMPBUF = VCC/2, IRAMPBUF = 0A

–30

VFAULT(OL)

FAULT Output Low Voltage

IFAULT = 3mA

0.2

0.4

VSDx(OL)

SDx Output Low Voltage

ISDx = 1mA, VCC = 2.3

0.2

0.4

VSTATUS(OL)

STATUS Output Low Voltage

ISTATUS = 3mA

0.2

0.4

IRAMP

RAMP Pin Input Current

0V < RAMP < VCC, VCC = 5.5V

±1

µA

VRAMPBUF(OL)

RAMPBUF Low Voltage

IRAMPBUF = 3mA

150

VRAMPBUF(OH)

RAMPBUF High Voltage (VCC – VRAMPBUF )IRAMPBUF = –3mA

100

200

IERROR(%)

IFBx to ITRACKx Current Mismatch

ITRACKx = –10µA

±5%

IERROR(%) = (IFBx – ITRACKx)/ITRACKx

ITRACKx = –1mA

±5%

VTRACKx

TRACK pin voltage

ITRACKx = –10µA

0.78

0.8

0.82

ITRACKx = –1mA

0.78

0.8

0.82

IFB(LEAK)

IFB Leakage Current

VFB = 1.5V, VCC = 5.5V

±10

VFB(CLAMP)

VFB Clamp Voltage

µA < IFB < 1mA

1.6

2.1

2.5

RREMOTE

REMOTE Feedback Switch Resistance

2V < VREMOTE < VCC

Ω

ISCTMR(UP)

Short-Circuit Timer Pullup Current

VSCTMR = 1V

–35

–50

–65

µA

ISCTMR(DN)

Short-Circuit Timer Pulldown Current

VSCTMR = 1V

123

µA

VSCTMR(TH)

Short-Circuit Timer Threshold Voltage

1.1

1.23

1.4

ISDTMR(UP)

Shutdown Timer Pullup Current

VSDTMR = 1V

–7

–10

–13

µA

VSDTMR(TH)

Shutdown Timer Threshold Voltage

1.1

1.23

1.4

IPGI(UP)

Power Good Input Pullup Current

VPGI = 0V

–5

–10

–15

µA

VPGI(TH)

Power Good Input Threshold Voltage

0.8

1.4

IPGTMR(UP)

Power Good Timer Pullup Current

VPGTMR = 1V

–8

–10

–14

µA

VPGTMR(TH)

Power Good Timer Threshold Voltage

1.1

1.23

1.4

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

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

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V unless otherwise noted.

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

of a device may be impaired.

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

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

otherwise specified.

Note 3: The GATE pin is internally limited to a minimum of 11.5V. Driving

this pin to voltages beyond the clamp may damage the part.

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