LTC4098EUDC-3.6 查看數據表（PDF） - Linear Technology

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LTC4098EUDC-3.6

USB Compatible Switching Power Manager/LiFePO4 Charger with Overvoltage Protection

Linear Technology 

LTC4098-3.6

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

erature range, otherwise specifications are at TA = 25°C (Note 2). VBUS = 5V, BAT = 3.3V, RCLPROG = 3.01k, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

tTERM

tBADBAT

hC/10

VCHRG

ICHRG

RON_CHG

TLIM

Safety Timer Termination Period

Bad Battery Termination Time

End of Charge Indication Current Ratio

Timer Starts When BAT = VFLOAT

BAT < VTRKL

(Note 5)

CHRG Pin Output Low Voltage

CHRG Pin Input Current

Battery Charger Power FET

On-Resistance (Between VOUT and BAT)

Junction Temperature in Constant-

Temperature Mode

ICHRG = 5mA

BAT = 4.5V, VCHRG = 5V

IBAT = 200mA

0.85

1

1.15

Hour

0.43

0.5

0.58

Hour

0.09

0.1

0.11

mA/mA

65

100

mV

0

1

µA

0.18

Ω

110

°C

NTC

VCOLD

Cold Temperature Fault Threshold

Voltage

Rising Threshold

Hysteresis

75.0

76.5

78.0 %NTCBIAS

2.9

%NTCBIAS

VHOT

Hot Temperature Fault Threshold

Falling Threshold

Voltage

Hysteresis

18.4

19.9

21.4 %NTCBIAS

1.9

%NTCBIAS

VDIS

NTC Disable Threshold Voltage

Falling Threshold

Hysteresis

0.5

1.3

2.3 %NTCBIAS

50

mV

INTC

Ideal Diode

NTC Leakage Current

NTC = 5V

–50

50

nA

VFWD

Forward Voltage Detection

RDROPOUT

Internal Diode On-Resistance, Dropout

IMAX

Diode Current Limit

Logic (D0, D1, D2)

IVOUT = 10mA

IVOUT = 200mA

15

mV

0.18

Ω

2

A

VIL

Input Low Voltage

VIH

Input High Voltage

IPD

Static Pull-Down Current

VPIN = 1V

0.4

V

1.2

V

2

µA

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 LTC4098E-3.6 is tested under pulsed load conditions such

that TJ ≈ TA. The LTC4098E-3.6 is guaranteed to meet performance

specifications from 0°C to 85°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: The LTC4098E-3.6 includes overtemperature protection that is

intended to protect the device during momentary overload conditions.

Junction temperature will exceed 125°C when overtemperature protection

is active. Continuous operation above the specified maximum operating

junction temperature may impair device reliability.

Note 4: Total input current is:

IVBUSQ + (VCLPROG/RCLPROG) • (hCLPROG + 1)

Note 5: hC/10 is expressed as a fraction of measured full charge current

with a 5k PROG resistor.

409836f

4

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