LTC2931

3

2931fb

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reference Voltage

●

1.192

1.210

1.228

V

Mode Selection Voltage Range

●

V

VPG Input Current

●

±20

nA

V1 Input Current

●

52

75

μA

V2 Input Current

V2 = 3.3V

●

0.8

2

μA

V3 Input Current

V3 = 2.5V

V3 = 0.55V (ADJ Mode)

●

●

–15

0.52

1.2

15

μA

nA

V4 Input Current

V4 = 1.8V

V4 = 0.55V (ADJ Mode)

V4 = –0.02V (–ADJ Mode)

●

●

●

–15

–15

0.34

0.8

15

15

μA

nA

nA

V5, V6 Input Current

V5, V6 = 0.55V

●

–15

15

nA

CRT Pull-Up Current

●

–1.4

–2

–2.6

μA

CRT Pull-Down Current

●

10

20

30

μA

Reset Timeout Period

●

234

ms

than 1%

150

μs

●

●

0.15

0.05

0.4

0.3

V

V

●

–2

–6

–12

μA

Voltage Output Low WDO

●

0.15

0.4

V

(Note 5)

●

V2-1

V

CWT Pull-Up Current

●

–1.4

–2

–2.6

μA

CWT Pull-Down Current

●

10

20

30

μA

Watchdog Timeout Period

●

20

30

40

ms

WDI Input Threshold High

●

1.6

V

WDI Input Threshold Low

●

0.4

V

WDI Input Pulse Width

●

150

ns

WDI Pull-Up Current

●

–4

–10

–16

μA

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 pins are positive, all voltages are referenced to GND

unless otherwise noted.

Note 4: Under static no-fault conditions, V1 will necessarily supply quiescent

current. If at any time V2 is larger than V1, V2 must be capable of supplying

the quiescent current, programming (transient) current and reference load

current.

pull-ups to V2 of typically 6μA. However, external pull-up resistors may be used