LTC4064 查看數據表（PDF） - Linear Technology

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LTC4064

Monolithic Linear Charger for Back-Up Li-Ion Batteries

Linear Technology 

LTC4064

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

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

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

VPROG

ICHRG

VCHRG

VACPR

VFAULT

IC/10

tTIMER

∆VRECHRG

PROG Pin Voltage

CHRG Pin Weak Pulldown Current

CHRG Pin Output Low Voltage

ACPR Pin Output Low Voltage

FAULT Pin Output Low Voltage

End of Charge Indication Current Level

TIMER Accuracy

Recharge Threshold Voltage

RPROG = 3k, IPROG = 500µA

VCHRG = 1V

ICHRG = 5mA

IACPR = 5mA

IFAULT = 5mA

RPROG = 3k

CTIMER = 0.1µF

VFLOAT - VRECHRG, VBAT > VTRIKL

Charge Termination Timer Expired

1.5

V

15

30

50

µA

0.35

0.6

V

0.35

0.6

V

0.35

0.6

V

44

50

56

mA

10

%

● 65

100 135

mV

VNTC-HOT

VHOT-HYS

VNTC-COLD

VCOLD-HYS

VNTC-DIS

VDIS-HYS

TLIM

NTC Pin Hot Threshold Voltage

NTC Pin Hot Hysteresis Voltage

NTC Pin Cold Threshold Voltage

NTC Pin Cold Hystersis Voltage

NTC Pin Disable Threshold Voltage

NTC Pin Disable Hystersis Voltage

Junction Temperature in

Constant-Temperature Mode

VNTC Falling

VNTC Rising

VNTC Rising

2.5

V

80

mV

4.375

V

80

mV

100

mV

10

mV

105

°C

RON

Power MOSFET “ON” Resistance

375

mΩ

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

of a device may be impaired.

Note 2: The Absolute Maximum BAT Current Rating of 1.3A is guaranteed

by design and current density calculations. The Absolute Maximum PROG

Current Rating is guaranteed to be 1/1000 of BAT current rating by design.

Note 3: The LTC4064 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 4: Failure to solder the exposed backside of the package to the PC

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

Note 5: Supply current includes PROG pin current (approximately 50µA)

but does not include any current delivered to the battery through the BAT

pin (approximately 50mA).

sn4064 4064fs

3

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