LTC2935

3

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

l

5.5

V

l

225

500

1000

nA

Reset Thresholds

S2 = Low : S1 = Low : S0 = Low

l

3.251

3.300

3.349

V

S2 = Low : S1 = Low : S0 = High

l

3.103

3.150

3.197

V

S2 = Low : S1 = High : S0 = High

l

2.955

3.000

3.045

V

S2 = Low : S1 = High : S0 = Low

l

2.808

2.850

2.892

V

S2 = High : S1 = High : S0 = Low

l

2.660

2.700

2.740

V

S2 = High : S1 = Low : S0 = Low

l

2.512

2.550

2.588

V

S2 = High : S1 = Low : S0 = High

l

2.364

2.400

2.436

V

S2 = High : S1 = High : S0 = High

l

2.217

2.250

2.283

V

Reset Threshold Differential

(Note 3)

l

142

150

158

mV

Relative to Any Selected Reset Threshold

l

4.5

5

6

%

Undervoltage Detect to RST Falling

1

ms

Power-Fail Thresholds

Power-Fail Threshold Differential

Any Selected Reset Threshold

l

100

150

200

mV

Power-Fail Threshold Hysteresis

Relative to Any Selected Power-Fail

l

2

2.5

3.5

%

Undervoltage Detect to PFO Falling

1

ms

Control Inputs: MR, S2, S1, S0

Control Input Threshold

S2, S1, S0

MR

l

l

0.4

1.4

V

V

Input Pulse Width

MR

l

20

μs

Propagation Delay to RST Falling

Manual Reset Falling

l

25

20

μs

Internal Pull-Up Resistance

MR

l

600

900

1200

kΩ

Input Leakage Current

l

±1

±10

nA

Reset and Power-Fail Outputs: RST, PFO

Voltage Output Low

S2, S1, S0 = Low

l

l

25

50

100

150

mV

mV

Voltage Output High (LTC2935-2)

–200μA Pull-Down Current

V

l

±1

±10

nA

Reset Timeout Period

l

140

200

260

ms

The

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.