LTC2927CDDB datasheet(3/16 Pages) LINER

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LTC2927

2927fb

TEMPERATURE (°C)

–50

770

780

790

800

810

820

–25

2927 G03

100

VCC (V)

4.45

4.50

4.55

4.60

4.65

4.70

2927 G02

2.5

3.0

3.5

4.0

4.5

6.0

5.5

5.0

ITRACK = IFB = –1mA

IRAMBUF = –2mA

VCC (V)

2.5

500

550

600

650

700

750

3.0

3.5

4.0

4.5

2927 G01

6.0

5.5

5.0

ITRACK = IFB = 0mA

IRAMBUF = 0mA

ICC vs VCC

VTRACK vs Temperature

The

l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. 2.9V < VCC < 5.5V unless otherwise noted (Note 2).

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: 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.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

Supply Voltage

2.9

5.5

ICC

Supply Current

IFB = 0mA, ITRACK = 0mA

0.25

0.56

1.2

IFB = –1mA, ITRACK = –1mA, IRAMPBUF = –1mA

3.6

4.2

VCC(UVLO)

Supply Undervoltage Lockout

VCC Rising

2.2

2.5

2.7

ΔVCC(UVHYST)

Supply Undervoltage Lockout Hysteresis

VON(TH)

ON Pin Threshold Voltage

VON Rising

1.210

1.230

1.250

ΔVON(HYST)

ON Pin Hysteresis

150

ION

ON Pin Input Current

VON = 1.2V, VCC = 5.5V

±100

IRAMP

RAMP Pin Input Current

0V < VRAMP < VCC, Ramp On

–9

–10

–11

μA

0V < VRAMP < VCC, Ramp Off

μA

VRAMPBUF(OL)

RAMPBUF Output Low Voltage

IRAMPBUF = 1mA

100

VRAMPBUF(OH)

RAMPBUF Output High Voltage,

VRAMPBUF(OH) = VCC – VRAMPBUF

IRAMPBUF = –1mA

150

VOS

Ramp Buffer Offset,

VOS = VRAMPBUF – VRAMP

VRAMP = VCC/2, IRAMPBUF = 0mA

–30

IERROR(%)

IFB to ITRACK Current Mismatch

IERROR(%) = (IFB – ITRACK)/ITRACK

ITRACK = –10μA

0±5

ITRACK = –1mA

0±5

VTRACK

TRACK Pin Voltage

ITRACK = –10μA

0.77

0.800

0.82

ITRACK = –1mA

0.77

0.800

0.82

IFB(LEAK)

FB Pin Leakage Current

VFB = 2V, VCC = 5.5V

±1

±100

VFB(CLAMP)

FB Pin Clamp Voltage

1μA < IFB < 1mA

1.5

2.3

VSDO(OL)

SDO Output Low Voltage

ISDO = 1mA, VCC = 2.3V

0.1

0.4

ELECTRICAL CHARACTERISTICS

TYPICAL PERFORMANCE CHARACTERISTICS

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