LTC2935 datasheet(3/12 Pages) LINER

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LTC2935

2935f

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.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VCC

VCC Input Supply Voltage

5.5

ICC

VCC Input Supply Current

225

500

1000

Reset Thresholds

VRTF1

Reset Threshold 1 (VCC Falling)

S2 = Low : S1 = Low : S0 = Low

3.251

3.300

3.349

VRTF2

Reset Threshold 2 (VCC Falling)

S2 = Low : S1 = Low : S0 = High

3.103

3.150

3.197

VRTF3

Reset Threshold 3 (VCC Falling)

S2 = Low : S1 = High : S0 = High

2.955

3.000

3.045

VRTF4

Reset Threshold 4 (VCC Falling)

S2 = Low : S1 = High : S0 = Low

2.808

2.850

2.892

VRTF5

Reset Threshold 5 (VCC Falling)

S2 = High : S1 = High : S0 = Low

2.660

2.700

2.740

VRTF6

Reset Threshold 6 (VCC Falling)

S2 = High : S1 = Low : S0 = Low

2.512

2.550

2.588

VRTF7

Reset Threshold 7 (VCC Falling)

S2 = High : S1 = Low : S0 = High

2.364

2.400

2.436

VRTF8

Reset Threshold 8 (VCC Falling)

S2 = High : S1 = High : S0 = High

2.217

2.250

2.283

ΔVRTF

Reset Threshold Differential

VRTF(N+1) – VRTF(N)

(Note 3)

142

150

158

VRT(HYST)

Reset Threshold Hysteresis (VCC Rising)

Relative to Any Selected Reset Threshold

4.5

tUVR

Undervoltage Detect to RST Falling

VCC Below Threshold by 1% (Note 3)

Power-Fail Thresholds

ΔVPFT

Power-Fail Threshold Differential

VPFT(N) – VRTF(N)

Any Selected Reset Threshold

(VCC Falling)

100

150

200

VPFT(HYST)

Power-Fail Threshold Hysteresis

Relative to Any Selected Power-Fail

Threshold (VCC Rising)

2.5

3.5

tUVP

Undervoltage Detect to PFO Falling

VCC Below Threshold by 1% (Note 3)

Control Inputs: MR, S2, S1, S0

VIN(TH)

Control Input Threshold

S2, S1, S0

0.3 • VCC

0.4

0.7 • VCC

1.4

tPW

Input Pulse Width

μs

tPD

Propagation Delay to RST Falling

Manual Reset Falling

μs

RPU

Internal Pull-Up Resistance

600

900

1200

kΩ

ILK

Input Leakage Current

S2, S1, S0 = VCC or GND

±1

±10

Reset and Power-Fail Outputs: RST, PFO

VOL

Voltage Output Low

VCC = 1V, 200μA Pull-Up Current

VCC = 3V, 3mA Pull-Up Current

S2, S1, S0 = Low

100

150

VOH

Voltage Output High (LTC2935-2)

–200μA Pull-Down Current

l 0.7 • VCC

IOH

Current Output High, Leakage (LTC2935-1) VRST, VPFO = 3.6V

±1

±10

tRST

Reset Timeout Period

140

200

260

The

l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C, VCC = 3.6V, unless otherwise noted. (Note 2)

Note 2. All currents into pins are positive, all voltages are referenced to

GND unless otherwise noted.

Note 3. Guaranteed by design. Characterized, but not production tested.

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