LTC4080EDD-PBF View Datasheet(PDF) - Linear Technology
Part Name
Description
Manufacturer
LTC4080EDD-PBF
Linear Technology
LTC4080EDD-PBF Datasheet PDF : 20 Pages
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LTC4080
ELECTRICAL CHARACTERISTICS The ● denotes specifications which apply over the full operating tempera-
ture range, otherwise specifications are at TA = 25°C, VCC = 5V, VBAT = 3.8V, V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 0V, VEN_BUCK = VBAT, VMODE = 0V. (Note 2)
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
Battery Charger
VFLOAT
VBAT Regulated Output Voltage
IBAT = 2mA
IBAT = 2mA, 4.3V < VCC < 5.5V
4.179 4.2 4.221
V
● 4.158 4.2 4.242
V
IBAT
Current Mode Charge Current
RPROG = 4k; Current Mode; VEN_BUCK = 0
● 90
100
110
mA
RPROG = 0.8k; Current Mode; VEN_BUCK = 0
● 475
500
525
mA
VUVLO_CHRG
VCC Undervoltage Lockout Voltage
VCC Rising
VCC Falling
● 3.5
3.6
3.7
V
● 2.8
3.0
3.2
V
VPROG
PROG Pin Servo Voltage
0.8k ≤ RPROG ≤ 4k
● 0.98
1.0
1.02
V
VASD
tSS_CHRG
Automatic Shutdown Threshold Voltage (VCC – VBAT), VCC Low to High
(VCC – VBAT), VCC High to Low
Battery Charger Soft-Start Time
60
82
100
mV
15
32
45
mV
180
μs
ITRKL
Trickle Charge Current
VBAT = 2V, RPROG = 0.8k
35
50
65
mA
VTRKL
Trickle Charge Threshold Voltage
VBAT Rising
● 2.75
2.9
3.05
V
VTRHYS
Trickle Charge Threshold Voltage
Hysteresis
100
150
350
mV
ΔVRECHRG
Recharge Battery Threshold Voltage VFLOAT – VBAT, 0°C < TA < 85°C
70
100
130
mV
ΔVUVCL1,
ΔVUVCL2
tTIMER
(VCC – VBAT) Undervoltage Current
Limit Threshold Voltage
Termination Timer
IBAT = 0.9 ICHG
IBAT = 0.1 ICHG
180 300
mV
90
130
mV
●
3
4.5
6
hrs
Recharge Time
● 1.5
2.25
3
hrs
IC/10
TLIM
RON_CHRG
fBADBAT
DBADBAT
Low-Battery Charge Time
VBAT = 2.5V
End of Charge Indication Current Level RPROG = 2k (Note 6)
Junction Temperature in Constant-
Temperature Mode
Power FET On-Resistance (Between
VCC and BAT)
IBAT = 350mA, VCC = 4V
Defective Battery Detection ⎯C⎯H⎯R⎯G Pulse VBAT = 2V
Frequency
Defective Battery Detection ⎯C⎯H⎯R⎯G Pulse VBAT = 2V
Frequency Duty Ratio
● 0.75
● 0.085
1.125
0.1
115
1.5
0.115
hrs
mA/mA
°C
750
mΩ
2
Hz
75
%
Buck Converter
VFB
IFB
fOSC
IBAT_NL_CF
IBAT_NL_BM
IBAT_SLP
VUVLO_BUCK
FB Servo Voltage
FB Pin Input Current
Switching Frequency
No-Load Battery Current (Continuous
Frequency Mode)
No-Load Battery Current (Burst Mode
Operation)
Battery Current in SLEEP Mode
Buck Undervoltage Lockout
VFB = 0.85V
No-Load for Regulator, V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V,
L = 10μH, C = 4.7μF
No-Load for Regulator, V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V,
MODE = VBAT, L = 10μH, C = 4.7μF
V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V, MODE = VBAT,
VOUT > Regulation Voltage
VBAT Rising
VBAT Falling
● 0.78 0.80 0.82
V
–50
50
nA
● 1.8
2.25 2.75
MHz
1.9
mA
23
μA
● 10
15
20
μA
● 2.6
2.7
2.8
V
● 2.4
2.5
2.6
V
4080fb
3
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