Datasheet

LTC4052-4.2
3
405242f
TYPICAL PERFOR A CE CHARACTERISTICS
UW
Note 1: Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2: Absolute Maximum Rating for GATE pin applies only to externally
applied voltage. During normal operation the LTC4052-4.2’s internal
charge pump can generate GATE pin voltage exceeding absolute
maximum but it is internally current limited.
Note 3: The LTC4052EMS8E-4.2 is guaranteed to meet performance
specifications from 0°C to 70°C. Specifications over the –40°C to 85°C
operating temperature range are assured by design, characterization and
correlation with statistical process controls.
Note 4: Junction temperature T
J
is calculated from the ambient
temperature T
A
and power dissipation P
D
according to the following
formula: T
J
= T
A
+ (P
D
• θ
JA
°C/W)
Note 5. This IC includes overtemperature protection that is intended to
protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specified maximum operating junction
temperature may impair device reliability.
ELECTRICAL CHARACTERISTICS
I
TRICKLE
(mA)
4.205
4.200
4.195
4.190
4.185
4.180
4.175
4.170
V
BAT
(V)
TEMPERATURE (°C)
–50
I
CHRG
(µA)
55
50
45
40
35
30
25
25 75
4052 G06
–25 0
50 100 125
TEMPERATURE (°C)
–50 25 75
4052 G05
–25 0
50 100 125
TEMPERATURE (°C)
–50 25 75
4052 G04
–25 0
50 100 125
T
TIMER
(%)
103
102
101
100
99
98
C
TIMER
= 0.1µF
V
IN
(V)
5
25
30
9
4052 G03
20
15
6
7
8
10
35
24.2
24.0
23.8
23.6
23.4
23.2
23.0
22.8
22.6
I
TRICKLE
(mA)
TEMPERATURE (°C)
–50 25 75
4052 G02
–25 0
50 100 125
TEMPERATURE (°C)
–50 25 75
4052 G01
–25 0
50 100 125
V
TRICKLE
(V)
2.47
2.46
2.45
2.44
2.43
2.42
V
BAT
= 2V
T
A
= 25°C
Trickle Charge Threshold Voltage
vs Temperature
Trickle Charge Current
vs Temperature
Trickle Charge Current vs Input
Supply Voltage
Normalized Timer Duration
vs Temperature
Battery Float Voltage
vs Temperature
CHRG Pin C/10 Pulldown Current
vs Temperature