LTC2953I データシートの表示（PDF） - Linear Technology

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LTC2953I

Push Button On/Off Controller with Voltage Monitoring

Linear Technology 

LTC2953

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

temperature range, otherwise specifications are at TA = 25°C. VIN = 2.7V to 27V, unless otherwise noted (Note 2).

SYMBOL

IPFI(LKG)

IPFO(LKG)

IUVLO(LKG)

IVM(LKG)

IRST(LKG)

tPFI

tRST

tuv

PARAMETER

⎯P⎯F⎯I Leakage Current

⎯P⎯FO Leakage Current

UVLO Leakage Current

VM Input Leakage Current

⎯R⎯S⎯T Output Leakage Current

⎯P⎯F⎯I Delay to ⎯P⎯F⎯O

Reset Timeout Period

VM Under Voltage Detect to ⎯R⎯S⎯T

CONDITIONS

VPFI = 0.5V

VPFI = 27V

VPFO = 1V

VPFO = 40V

VUVLO = 0.5V

VUVLO = 27V

VM = 0.5V

VRST = 3V

VM Less Than VM(TH) By More Than 1%

MIN TYP MAX UNITS

●

2

±10

nA

±1

μA

●

2

±10

nA

±1

μA

●

2

±10

nA

±1

μA

●

2

±10

nA

●

±0.1

μA

● 40

100

200

μs

● 140

200

260

ms

250

μs

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 3: The Enable Lock Out time is designed to allow an application to

properly power down such that the next power up sequence starts from a

consistent powered down configuration. ⎯P⎯B is ignored during this lock out

time. This time delay does not include tDB, ON.

Note 4: To manually force a release of the EN/⎯E⎯N pin, either ⎯P⎯B or UVLO

must be held low for at least tPD, Min (internal default power down timer) +

tPDT (adjustable by placing external capacitor at PDT pin).

Note 5: The ⎯K⎯I⎯L⎯L turn on blanking timer period (tKILL, ON BLANK) is the

waiting period immediately after enable output is asserted. This blanking

time allows sufficient time for the DC/DC converter and the μP to perform

power up tasks. The ⎯K⎯I⎯L⎯L, ⎯P⎯B and UVLO inputs are ignored during this

period. If ⎯K⎯I⎯L⎯L remains low at the end of this blanking period, the enable

output is released, thus turning off system power.

2953f

4

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