LTC4085EDE-PBF Просмотр технического описания (PDF) - Linear Technology

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LTC4085EDE-PBF

USB Power Manager with Ideal Diode Controller and Li-Ion Charger

Linear Technology 

LTC4085

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

temperature range, otherwise specifications are at TA = 25°C. VIN = 5V, VBAT = 3.7V, HPWR = 5V, WALL = 0V, RPROG = 100k,

RCLPROG = 2k, unless otherwise noted.

SYMBOL

PARAMETER

CONDITIONS

MIN TYP MAX

VCHG(SD)

ICHG(SD)

VWAR

VWAF

VWDR

VWDF

IWALL

NTC

Charger Shutdown Threshold Voltage

on TIMER

Charger Shutdown Pull-Up Current

on TIMER

Absolute Wall Input Threshold Voltage

Absolute Wall Input Threshold Voltage

Delta Wall Input Threshold Voltage

Delta Wall Input Threshold Voltage

Wall Input Current

VTIMER = 0V

VWALL Rising Threshold

VWALL Falling Threshold

VWALL – VBAT Rising Threshold

VWALL – VBAT Falling Threshold

VWALL = 5V

l 0.15

0.4

l

5

14

l 4.15 4.25 4.35

3.12

75

l

0

25

50

75

150

VVNTC

INTC

VCOLD

VHOT

VDIS

VNTC Bias Voltage

NTC Input Leakage Current

Cold Temperature Fault Threshold

Voltage

Hot Temperature Fault Threshold

Voltage

NTC Disable Voltage

IVNTC = 500μA

VNTC = 1V

Rising Threshold

Hysteresis

Falling Threshold

Hysteresis

NTC Input Voltage to GND (Falling)

Hysteresis

l 4.4

4.85

0

±1

0.74 • VVNTC

0.02 • VVNTC

0.29 • VVNTC

0.01 • VVNTC

l 75

100

125

35

UNITS

V

μA

V

V

mV

mV

μA

V

μA

V

V

V

V

mV

mV

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: VCC is the greater of VIN, VOUT or VBAT.

Note 3: All voltage values are with respect to GND.

Note 4: This IC includes overtemperature protection that is intended

to protect the device during momentary overload conditions. Junction

temperatures will exceed 125°C when overtemperature protection is

active. Continuous operation above the specified maximum operating

junction temperature may result in device degradation or failure.

Note 5: The LTC4085E is guaranteed to meet specified performance 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 6: Guaranteed by long term current density limitations.

Note 7: Total input current is equal to this specification plus 1.002 • IBAT

where IBAT is the charge current.

Note 8: Accuracy of programmed current may degrade for currents greater

than 1.5A.

4085fd

4

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