LTC2916 datasheet(4/12 Pages) LINER

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LTC2915/LTC2916

29156fa

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Reset Timer Control (RT)

IRT(UP)

RT Pull-Up Current

VRT = 0.25V

–2

–3

–4

μA

IRT(DOWN)

RT Pull-Down Current

VRT = 1.1V

234

μA

IRT(INT)

Internal RT VCC Detect Current

VRT = VCC

μA

VRT(INT,LH)

RT Internal Timer Threshold

VRT Rising, Referenced to VCC

–100

–160

–300

Reset Output (RST)

tRST(INT)

Internal Reset Timeout Period

VRT = VCC

150

200

260

tRST(EXT)

Adjustable Reset Timeout Period

CRT = 2.2nF

tUV

VM Undervoltage Detect to RST

Asserted

VM Less Than Reset Threshold

VMTX by More Than 5%

150

μs

VOL

Output Voltage Low RST

VCC = 3.3V, IRST = 2.5mA

VCC = 1V, IRST = 100μA

VCC = 0.8V, IRST = 15μA

0.15

0.05

0.4

0.3

0.2

IOH(RST)

RST Output Voltage High Leakage

RST = VCC

±1

μA

Manual Reset Input (LTC2916)

VIL

Input Low Voltage

0.2 • VCC

VIH

Input High Voltage

l 0.8 • VCC

RPU

Pull Up Resistance

100

150

tPW

Pulsewidth

250

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.

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TA = 25°C. VCC = 2.5V, unless otherwise noted. (Note 2)

Note 3: VCC maximum pin voltage is limited by input current. Since the

VCC pin has an internal 6.2V shunt regulator, a low impedance supply

which exceeds 5.7V may exceed the rated terminal current. Operation

from higher voltage supplies requires a series dropping resistor. See

Applications Information.

Note 4: Input impedance is dependent on the conﬁguration of the SEL

pins.

TIMING DIAGRAM

Monitor Input Timing

RST

VMTx

tUV

tRST

29156 TD01

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