LTC1734 datasheet(3/12 Pages) LINER

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LTC1734

The q denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C. VCC = 5V, GND = 0V and VBAT is equal to the float voltage unless

otherwise noted. All current into a pin is positive and current out of a pin is negative. All voltages are referenced to GND, unless

otherwise specified.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Charger Manual Control

VMSDT

Manual Shutdown Threshold

VPROG Increasing

2.05

2.15

2.25

VMSHYS

Manual Shutdown Hysteresis

VPROG Decreasing from VMSDT

IPROGPU

Programming Pin Pull-Up Current

VPROG = 2.5V

– 6

– 3

– 1.5

µA

Protection

IDSHRT

Drive Output Short-Circuit Current Limit

VDRIVE = VCC

130

Note 1: Absolute Maximum Ratings are those values beyond which the life

of a device may be impaired.

Note 2: The LTC1734E is guaranteed to meet performance specifications

from 0

°C to 70°C ambient temperature range and 0°C to 100°C junction

temperature range. Specifications over the – 40

°C to 85°C operating

ambient temperature range are assured by design, characterization and

correlation with statistical process controls.

Note 3: Assumes that the external PNP pass transistor has negligible B-C

reverse-leakage current when the collector is biased at 4.2V (VBAT) and the

base is biased at 5V (VCC).

Note 4: Assumes that the external PNP pass transistor has negligible B-E

reverse-leakage current when the emitter is biased at 0V (VCC) and the

base is biased at 4.2V (VBAT).

Note 5: The 4.68V maximum undervoltage lockout (UVLO) exit threshold

must first be exceeded before the minimum VCC specification applies.

Short duration drops below the minimum VCC specification of several

microseconds or less are ignored by the UVLO. If manual shutdown is

entered, then VCC must be higher than the 4.68V maximum UVLO

threshold before manual shutdown can be exited. When operating near the

minimum VCC, a suitable PNP transistor with a low saturation voltage

must be used.

TYPICAL PERFOR A CE CHARACTERISTICS

Float Voltage vs Temperature

and Supply Voltage

TEMPERATURE (

°C)

–50

4.19

4.20

4.21

1734 G01

–25

100

125

IBAT = 10mA

PNP = FCX589

4.2V OPTION

VCC = 8V

VCC = 4.55V

IBAT (mA)

4.199

4.200

4.201

200

400

500

1734 G02

100

300

600

700

VCC = 5V

TA = 25°C

PNP = FCX589

4.2V OPTION

RPROG = 2150Ω

TEMPERATURE (

°C)

–50

190

200

210

1734 G03

–25

100

125

RPROG = 7.5k

PNP = FCX589

VCC = 4.55V AND 8V

Float Voltage vs IBAT

IBAT1 vs Temperature

and Supply Voltage

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