LTC2909

3

2909fa

(LTC2909-5), ADJ1 = ADJ2 = 0.55V, SEL = floating, unless otherwise noted. (Note 2)

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Operating Supply Voltage

⎯R⎯S⎯T in Correct State

●

0.5

V

●

6.0

6.5

6.9

V

●

50

150

µA

ADJ Input Threshold

●

0.492

0.500

0.508

V

ADJ Hysteresis (Note 4)

1.5

3.5

10.0

mV

ADJ Input Current

●

±15

nA

LTC2909-2.5

LTC2909-3.3

LTC2909-5

●

●

●

2.175

2.871

4.350

2.213

2.921

4.425

2.250

2.970

4.500

V

V

V

UVLO Hysteresis (Note 4)

0.3

0.7

2.0

%

Buffered Reference Voltage

●

0.985

1.000

1.015

V

TMR Pull-Up Current

●

–1.5

–2.1

–2.7

µA

TMR Pull-Down Current

●

1.5

2.1

2.7

µA

Reset Timeout Period, External

●

16

20

25

ms

Reset Timeout Period, Internal

●

150

200

260

ms

Timer Disable Voltage

●

– 0.36

– 0.25

– 0.16

V

Timer Disable Hysteresis

●

60

110

150

mV

Timer Internal Mode Voltage

●

0.14

0.21

0.27

V

Timer Internal Mode Hysteresis

●

40

70

110

mV

ADJx Comparator Propagation Delay

to

⎯R⎯S⎯T

ADJx Driven Beyond Reset Threshold

●

50

150

500

µs

●

50

150

500

µs

⎯R⎯S⎯T Output Voltage Low

●

●

●

0.01

0.01

0.10

0.15

0.15

0.30

V

V

V

⎯R⎯S⎯T Output Voltage High Leakage

●

±1

µA

Three-State Input SEL

Low Level Input Voltage

●

0.4

V

High Level Input Voltage

●

1.4

V

Pin Voltage when Left in Open State

0.9

V

Allowable Leakage in Open State

●

±5

±10

µA

µA

SEL Input Current

●

±25

µA

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.

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

GND unless otherwise noted.

which exceeds 6V may exceed the rated terminal current. Operation

from higher voltage supplies requires a series dropping resistor. See

Applications Information.

Note 4: Threshold voltages have no hysteresis unless the part is in

comparator mode. Hysteresis is one-sided, affecting only invalid-to-valid

transitions. See Applications Information.