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LTC4061

4061fc

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

temperature range, otherwise speciﬁcations are at TA = 25°C. VCC = 5V, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

VUT

User Termination Mode Threshold

VTIMER from Low to High

3.9

4.2

Voltage

Hysteresis

IDETECT

Charge Current Detection Threshold

RDET = 1k, 0 ≤ TA ≤ 85°C

100

110

RDET = 2k, 0 ≤ TA ≤ 85°C

RDET = 10k, 0 ≤ TA ≤ 85°C

RDET = 20k, 0 ≤ TA ≤ 85°C

3.8

6.2

∆VRECHRG

Recharge Threshold Voltage

VFLOAT – VRECHRG, 0 ≤ TA ≤ 85°C

100

135

tSS

Soft-Start Time

IBAT from 0 to ICHRG

100

µs

tTERM

Termination Comparator Filter Time

Current Termination Mode

0.8

1.5

2.5

tRECHRG

Recharge Comparator Filter Time

tTIMER

Charge Cycle Time

CTIMER = 0.1µF

2.55

3.45

RC/5

C/5 Pin Pull-Down Resistor

●

3.4

Ω

VC/5

C/5 Input Threshold Voltage

C/5 Rising, 4.3V < VCC < 8V

0.4

0.7

Hysteresis

VNTC-HOT

NTC Pin Hot Threshold Voltage

VNTC Falling

0.35 • VCC

VNTC Rising

0.36 • VCC

VNTC-COLD

NTC Pin Cold Threshold Voltage

VNTC Rising

0.76 • VCC

VNTC Falling

0.75 • VCC

VNTC-DIS

NTC Pin Disable Threshold Voltage

VNTC Falling

100

Hysteresis

fCHRG

NTC Fault Pulsing Frequency

Current/User Termination Mode

1.5

Time Termination Mode CTIMER = 0.1µF

1.5

TLIM

Junction Temperature in Constant

105

°C

Temperature Mode

RON

Power FET “ON” Resistance

VBAT = 3.85V, ICC = 175mA, RPROG = 2k

375

Ω

(Between VCC and BAT)

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 LTC4061 is guaranteed to meet performance speciﬁcations

from 0°C to 70°C. Speciﬁcations over the –40°C to 85°C operating

temperature range are assured by design, characterization and correlation

with statistical process controls.

Note 3: Failure to correctly solder the exposed pad of the package to the

PC board will result in a thermal resistance much higher than 40°C/W.

Note 4: Supply current includes PROG pin current and IDET pin current

(approximately 100µA each) but does not include any current delivered to

the battery through the BAT pin (approximately 100mA).

Note 5: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions.

Overtemperature protection will become active at a junction temperature

greater than the maximum operating temperature. Continuous operation

above the speciﬁed maximum operating junction temperature may impair

device reliability.

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