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LTC2921/LTC2922 Series

29212fa

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V for LTC2921/LTC2922, VCC = 3.3V for

LTC2921-3.3/LTC2922-3.3, and VCC = 2.5V for LTC2921-2.5/LTC2922-2.5, unless otherwise noted.

ELECTRICAL CHARACTERISTICS

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

of a device may be impaired.

Note 2: TJ is calculated from the ambient temperature TA and power

dissipation PD as follows:

LTC2921 Series: TJ = TA + (PD • 110°C/W)

LTC2922 Series: TJ = TA + (PD • 90°C/W)

Note 3: This specification applies to all switches, and is measured with

VS < VD.

Note 4: The PG pin will rise to approximately the same voltage as the

GATE pin when not pulled up or pulled down by external resistance.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC(UVLO)

Supply Undervoltage Lockout

VCC Rising

2.08

2.20

2.30

VCC(UVH)

Supply Undervoltage Hysteresis

VCC Falling

120

Electronic Circuit Breaker

∆VSENSE

Circuit Breaker Trip Voltage

∆VSENSE = VCC - VSENSE

ISENSE

SENSE Pin Input Current

150

500

tV1(DLY)

Circuit Breaker Trip Delay Time

VCC - VSENSE = 150mV

LTC2921/LTC2922

0.5

1.5

3.0

µs

LTC2921-3.3/LTC2922-3.3

0.5

1.5

3.0

µs

LTC2921-2.5/LTC2922-2.5

0.5

1.5

6.0

µs

tV1(RST)

Circuit Breaker Reset Pulse Width

Guaranteed Not to Reset

µs

Guaranteed to Reset

150

µs

VV1(RST)

Circuit Breaker Reset Threshold Voltage

0.490

0.500

0.510

Monitor Inputs

VMON

V1-V4 Monitor Threshold Voltages

0.495

0.500

0.505

0.492

0.500

0.508

VOV

V1-V4 Overvoltage Thresholds

0.665

0.700

0.735

IMON

V1-V4 Input Currents

±0.1

µA

TIMER Pin

VTIMER(TH)

TIMER Ramp Threshold Voltage

1.15

1.20

1.25

ITIMER(PU)

TIMER Pull-Up Current

VTIMER = 1V

–1.3

–2.0

–2.5

µA

ITIMER(PD)

TIMER Pull-Down Current

VCC = 2.35V, VTIMER = 0.4V

100

µA

VTIMER(CLR)

TIMER Cleared Threshold Voltage

VTIMER Falling

150

250

GATE Pin

VGATE

GATE Drive Output Voltage

LTC2921/LTC2922

10.0

11.1

12.2

LTC2921-3.3/LTC2922-3.3

8.4

9.1

9.8

LTC2921-2.5/LTC2922-2.5

6.1

6.8

7.5

IGATE(PU)

GATE Pull-Up Current

VGATE = VCC

–6.5

–10.0

–12.5

µA

IGATE(PD)

GATE Pull-Down Current

VCC = 2.35V, VGATE = 2.35V

Remote Sense Switches

RDS(FB)

Feedback Switch Resistances (Note 3)

VD = VCC

210

Ω

PG Pin

IPG(PU)

PG Pull-Up Current

VPG = VCC

–2.6

–4.0

–5.0

µA

IPG(PD)

PG Pull-Down Current

VCC = 2.35V, VPG = 2.35V

VPG(OL)

PG Output Low Voltage

VCC = 2.35V, IPG = 5mA

0.4

VPG

PG Output Voltage (Note 4)

LTC2921/LTC2922

10.0

11.1

12.2

LTC2921-3.3/LTC2922-3.3

8.4

9.1

9.8

LTC2921-2.5/LTC2922-2.5

6.1

6.8

7.5

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