LTC4080X 查看數據表（PDF） - Linear Technology
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LTC4080X
Linear Technology
LTC4080X Datasheet PDF : 20 Pages
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LTC4080X
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
VCC
Battery Charger Supply Voltage
(Note 4)
● 3.75
5
5.5
V
VBAT
Input Voltage for the Switching
(Note 5)
Regulator
● 2.7
3.8
4.5
V
ICC
Quiescent Supply Current (Charger On, VBAT = 4.5V (Forces IBAT and IPROG = 0),
●
Switching Regulator Off)
VEN_BUCK = 0
ICC_SD
Supply Current in Shutdown (Both
Battery Charger and Switching
Regulator Off)
V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V, VEN_BUCK = 0, VCC > VBAT
●
V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 4V, VEN_BUCK = 0, VCC (3.5V) <
VBAT (4V)
IBAT_SD
Battery Current in Shutdown (Both
Battery Charger and Switching
Regulator Off)
V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V, VEN_BUCK = 0, VCC > VBAT
●
V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 4V, VEN_BUCK = 0, VCC (3.5V) <
VBAT (4V)
Battery Charger
110 300
µA
5
10
µA
2
µA
0.6
5
µA
2
µA
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
Automatic Shutdown Threshold Voltage (VCC – VBAT), VCC Low to High
(VCC – VBAT), VCC High to Low
60
82
100
mV
15
32
45
mV
tSS_CHRG
Battery Charger Soft-Start Time
180
µs
VBADBAT
Bad Battery Threshold Voltage
2.9
V
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
Charge 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
Low-Battery Charge Time
VBAT = 2.5V
IC/10
End of Charge Indication Current Level RPROG = 2k (Note 6)
TLIM
Junction Temperature in Constant-
Temperature Mode
● 0.75
● 0.085
1.125
0.1
115
1.5
0.115
hrs
mA/mA
°C
RON_CHRG
fBADBAT
DBADBAT
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
750
mΩ
2
Hz
75
%
Buck Converter
VFB
IFB
fOSC
IBAT_NL_CF
FB Servo Voltage
FB Pin Input Current
Switching Frequency
No-Load Battery Current (Continuous
Frequency Mode)
VFB = 0.85V
No-Load for Regulator, V⎯E⎯N⎯_⎯C⎯H⎯R⎯G = 5V,
L = 10µH, C = 4.7µF
● 0.78 0.80 0.82
V
–50
50
nA
● 1.8
2.25 2.75
MHz
1.9
mA
4080Xf
3
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