3

LTC2903-1

29031f

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

V1 Input Current (Note 4)

V1 = 3.3V (LTC2903-A1)

q

20

80

µA

V1 = 5V (LTC2903-B1, LTC2903-C1)

q

25

80

µA

V2 Input Current (Note 4)

V2 = 2.5V (LTC2903-A1)

q

830

µA

V2 = 3.3V (LTC2903-B1, LTC2903-C1)

q

10

30

µA

V3 Input Current

V3 = 1.8V (LTC2903-A1, LTC2903-C1)

q

630

µA

V3 = 2.5V (LTC2903-B1)

q

830

µA

V4 Input Current

V4 = 0.55V (LTC2903-A1)

q

±15

nA

V4 = 1.8V (LTC2903-B1)

q

24

µA

V4 = –5.2V (LTC2903-C1)

q

–3

–6

µA

Reset Time-Out Period

q

140

200

260

ms

150

µs

More Than 1%

Output Voltage High RST (LTC2903-1) (Note 5)

q

V2 – 1

V

Output Voltage Low RST (Note 6)

q

560

mV

q

10

150

mV

q

25

300

mV

q

100

300

mV

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

of the device may be impaired.

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

GND unless otherwise noted.

voltage on the V1, V2 inputs.

Note 4: Under typical operating conditions, quiescent current is drawn

from the V1 input. When V2 exceeds V1, V2 supplies the quiescent

current.

Note 5: The RST output pin on the LTC2903-1 has an internal pull-up to

V2 of typically 10

greater than V2, use an external pull-up resistor.

Note 6: At input voltages below 1V on V1 and V2, voltage on V3 assists

pulling down the RST output.

ELECTRICAL CHARACTERISTICS