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LT3652

3652fb

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

tTIMER

Full Charge Cycle Timeout

Precondition Timeout

22.5

min

Timer Accuracy

–10

Operating Frequency

1MHz

Duty Cycle Range

Continuous Operation

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

temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 20V, Boost – SW = 4V, SHDN = 2V, VFB = 3.3V, CTIMER = 0.68μF.

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: The LT3652EDD is guaranteed to meet performance speciﬁcations

from 0°C to 125°C junction temperature. Speciﬁcations over the –40°C

to 125°C operating junction temperature range are assured by design,

characterization, and correlation with statistical process controls. The

LT3652IDD speciﬁcations are guaranteed over the full –40°C to 125°C

operating junction temperature range. High junction temperatures degrade

operating lifetimes.

Note 3: VIN minimum voltages below the start threshold are only

supported if (VBOOST-VSW) > 2V.

Note 4: This parameter is valid for programmed output battery ﬂoat

voltages ≤ 4.2V. VIN operating range minimum is 0.75V above the

programmed output battery ﬂoat voltage (VBAT(FLT) + 0.75V). VIN Start

Voltage is 3.3V above the programmed output battery ﬂoat voltage

(VBAT(FLT) + 3.3V).

Note 5: Output battery ﬂoat voltage (VBAT(FLT)) programming resistor

divider equivalent resistance = 250k compensates for input bias current.

Note 6: All VFB voltages measured through 250k series resistance.

Note 7: VSENSE(DC) is reduced by thermal foldback as junction temperature

approaches 125°C.

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