Li-Ion/Polymer Shunt Battery Charger System with Low Battery Disconnect
LTC4071
Li-Ion/Polymer Shunt Battery Charger
System with Low Battery Disconnect
FEATURES DESCRIPTION Charger Plus Pack Protection in One IC
n Low Operating Current (550nA)
n Near Zero Current ( VFLOAT l ICCQ VCC Operating Current VHBO Low, ADJ = VCC l 2 mA
nA
Rev. D For more information www.analog.com LTC4071
ELECTRICAL
CHARACTERISTICS The
l denotes the specifications which apply over the full operating junction temperature range. Conditions are VNTC = VADJ = VCC, VLBSEL = GND, TJ = 25°C unless otherwise specified. Current into a pin
is positive and current out of a pin is negative. All voltages are referenced to GND unless otherwise noted. (Note 2)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS 0.01
0.01 25 nA
nA 4 6 Ω 2.60 2.70 2.79 V 2.52 2.70 2.79 V 3.05 3.20 3.28 V 2.95 3.20 3.28 V Low Battery Disconnect
ILEAK Battery Disconnect Leakage
Current VCC < VBAT = 2.65V RDSON Resistance of VCC – BAT Switch IBAT = –1mA, VHBO High VLBD Low Battery Disconnect VBAT Falling, IBAT = –1mA, LBSEL = VCC, 0°C < Temp < 125°C l VBAT Falling, IBAT = –1mA, LBSEL = VCC l VBAT Falling, IBAT = –1mA, LBSEL = GND, 0°C < Temp < 125°C
VBAT Falling, IBAT = –1mA, LBSEL = GND
VLBC_BAT
VLBC_VCC Low Battery Connect
Low Battery Connect l VBAT Rising, IBAT = –1mA, LBSEL = VCC 2.97 V VBAT Rising, IBAT = –1mA, LBSEL = GND 3.53 V VCC Rising, LBSEL = VCC
VCC Rising, LBSEL = GND 3.6
4.19 V …
