ltc4077 Linear Technology Corporation, ltc4077 Datasheet - Page 3

• Manufacturer Part Number: ltc4077
• Description: Dual Input Standalone Li-ion Battery Charger
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
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.
SYMBOL
I
I
V
V
V
V
V
V
R
V
R
V
V
ΔV
t
t
t
R
R
T
C/2
TRIKL
RECHRG
TERMINATE
SS
ASD-DC
ASD-USB
LIM
TRIKL
UVDC
UVUSB
EN
HPWR
 C  H  R  G
 P  W  R
EN
HPWR
ON-DC
ON-USB
RECHRG
PARAMETER
Charge Current Termination Threshold
Trickle Charge Current
Trickle Charge Threshold Voltage
DCIN Undervoltage Lockout Voltage
USBIN Undervoltage Lockout Voltage
V
V
EN Input Threshold Voltage
EN Pulldown Resistance
HPWR Input Threshold Voltage
HPWR Pulldown Resistance
 C  H  R  G Output Low Voltage
 P  W  R 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
DCIN
USBIN
– V
– V
BAT
BAT
Lockout Threshold
Lockout Threshold
A
= 25°C. V
CONDITIONS
HPWR = 0V (Note 8)
V
V
V
V
Hysteresis
From Low to High
Hysteresis
From Low to High
Hysteresis
V
V
V
V
I
I
V
V
I
I
 C  H  R  G
 P  W  R
BAT
BAT
BAT
BAT
BAT
BAT
DCIN
DCIN
USBIN
USBIN
FLOAT
BAT
The
Drops Below Termination Threshold
= 10% to 90% Full-Scale
< V
< V
< V
Rising
from High to Low
= 5mA
from Low to High, V
from High to Low, V
= 5mA
– V
from Low to High
from High to Low
●
TRIKL
TRIKL
TRIKL
DCIN
RECHRG
denotes the specifications which apply over the full operating
; R
; R
; R
= 5V, V
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: I
Note 8: I
Note 9: V
IDC
IUSB
IUSBL
, 0°C < T
= 1.25k
= 2.1k
= 4k
USBIN
C/10
C/2
CC
BAT
A
BAT
< 85°C
is expressed as a fraction of measured full charge current.
is greater of DCIN or USBIN.
= 5V, HPWR = 5V unless otherwise noted.
is expressed as a fraction of measured full charge current.
= 4.2V
= 4.2V
●
●
●
0.45
MIN
140
140
175
2.8
3.8
0.4
0.4
0.8
60
30
17
20
20
65
4
1
1
3
47.5
4.15
3.95
0.35
0.35
TYP
100
200
200
180
180
100
250
400
550
105
0.5
2.9
0.7
0.7
1.5
80
25
50
50
2
2
6
LTC4077
MAX
0.55
100
220
220
135
325
4.3
4.1
0.6
0.6
2.2
65
33
80
80
10
3
1
5
1
5
mA/mA
UNITS
4077fa
3
MΩ
MΩ
mΩ
mΩ
mA
mA
mA
mV
mV
mV
mV
mV
mV
mV
mV
ms
ms
µs
°C
V
V
V
V
V
V
V