LTC4077(RevA) 查看數據表（PDF） - Linear Technology
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LTC4077 Datasheet PDF : 16 Pages
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LTC4077
ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VDCIN = 5V, VUSBIN = 5V, HPWR = 5V unless otherwise noted.
SYMBOL
IC/2
ITRIKL
VTRIKL
VUVDC
VUVUSB
VASD-DC
VASD-USB
VEN
REN
VHPWR
RHPWR
VCHRG
VPWR
ΔVRECHRG
tRECHRG
tTERMINATE
tSS
RON-DC
RON-USB
TLIM
PARAMETER
Charge Current Termination Threshold
Trickle Charge Current
Trickle Charge Threshold Voltage
DCIN Undervoltage Lockout Voltage
USBIN Undervoltage Lockout Voltage
VDCIN – VBAT Lockout Threshold
VUSBIN – VBAT Lockout Threshold
EN Input Threshold Voltage
EN Pulldown Resistance
HPWR Input Threshold Voltage
HPWR Pulldown Resistance
CHRG Output Low Voltage
PWR Output Low Voltage
Recharge Battery Threshold Voltage
Recharge Comparator Filter Time
Termination Comparator Filter Time
Soft-Start Time
Power FET “ON” Resistance
(Between DCIN and BAT)
Power FET “ON” Resistance
(Between USBIN and BAT)
Junction Temperature in
Constant-Temperature Mode
CONDITIONS
HPWR = 0V (Note 8)
VBAT < VTRIKL; RIDC = 1.25k
VBAT < VTRIKL; RIUSB = 2.1k
VBAT < VTRIKL; RIUSBL = 4k
VBAT Rising
Hysteresis
From Low to High
Hysteresis
From Low to High
Hysteresis
VDCIN from Low to High, VBAT = 4.2V
VDCIN from High to Low, VBAT = 4.2V
VUSBIN from Low to High
VUSBIN from High to Low
ICHRG = 5mA
IPWR = 5mA
VFLOAT – VRECHRG, 0°C < TA < 85°C
VBAT from High to Low
IBAT Drops Below Termination Threshold
IBAT = 10% to 90% Full-Scale
MIN TYP MAX UNITS
● 0.45
0.5
0.55 mA/mA
60
80
100
mA
30
47.5
65
mA
17
25
33
mA
2.8
2.9
3
V
100
mV
4
4.15
4.3
V
200
mV
3.8
3.95
4.1
V
200
mV
140
180
220
mV
20
50
80
mV
140
180
220
mV
20
50
80
mV
0.4
0.7
1
V
●1
2
5
MΩ
0.4
0.7
1
V
●1
2
5
MΩ
0.35
0.6
V
0.35
0.6
V
65
100
135
mV
3
6
10
ms
0.8
1.5
2.2
ms
175
250
325
µs
400
mΩ
550
mΩ
105
°C
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: The LTC4077E is guaranteed to meet the performance
specifications 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 3: Failure to correctly solder the exposed backside of the package to
the PC board will result in a thermal resistance much higher than 40°C/W.
See Thermal Considerations.
Note 4: Supply current includes IDC pin current (approximately 100µA)
but does not include any current delivered to the battery through the BAT
pin.
Note 5: Supply current includes IUSB and IUSBL pin currents
(approximately 100µA each) but does not include any current delivered to
the battery through the BAT pin.
Note 6: Guaranteed by long term current density limitations.
Note 7: IC/10 is expressed as a fraction of measured full charge current.
Note 8: IC/2 is expressed as a fraction of measured full charge current.
Note 9: VCC is greater of DCIN or USBIN.
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