Datasheet

LTC4052-4.2
2
405242f
Input Supply Voltage (V
IN
)....................................... 12V
BAT Voltage ...............................................–0.3V to 12V
GATE (Note 2) .............................................–0.3V to 8V
SENSE, TIMER..................................–0.3V to V
IN
+0.3V
CHRG, ACPR .............................................–0.3V to 12V
SENSE, BAT Peak Current ...................................... 1.5A
Operating Temperature Range (Note 3) .. –40°C to 85°C
Junction Temperature (Note 4)............................. 125°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)..................300°C
MS8 PART MARKING
T
JMAX
= 125°C, θ
JA
= 35°C/W
EXPOSED PAD IS GROUND.
(MUST BE SOLDERED TO PCB).
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN
Input Supply Voltage Wall Adapter Open Circuit Voltage ● 4.5 10 V
I
IN
Input Quiescent Supply Current Full Charge Mode ● 0.7 1.4 mA
V
BAT
Battery Float Voltage 0°C ≤ T
A
≤ 85°C 4.158 4.200 4.242 V
● 4.137 4.200 4.242 V
V
RECHRG
Recharge Battery Voltage Threshold Battery Voltage Falling 0°C ≤ T
A
≤ 85°C 3.990 4.050 4.110 V
● 3.969 4.050 4.110 V
V
MARGIN
V
BAT
– V
RECHRG
Margin ● 75 150 225 mV
V
IMAX
Overcurrent Trip Sense Voltage ● 90 105 120 mV
I
TRICKLE
Trickle Charge Current V
BAT
= 2V ● 14 24 34 mA
V
TRICKLE
Trickle Charge Threshold Voltage V
BAT
Rising ● 2.35 2.45 2.55 V
R
DS(ON)
Internal Switch On-Resistance V
BAT
= 2.6V 0.45 0.7 Ω
V
BAT
= 4V 0.35 0.5 Ω
V
GATE
GATE Pin Voltage V
BAT
= 2.6V 6.5 V
V
BAT
= 4V 10.5 V
T
TIMER
TIMER Period Accuracy C
TIMER
= 0.1µF, Full Charge Mode ±10 %
I
LEAK
Battery Leakage Current Through Charger V
BAT
= 4V, V
IN
= 0V ● 1 µA
V
SLEEP
Sleep Threshold Voltage (V
IN
– V
BAT
) Low to High 20 45 70 mV
(V
IN
– V
BAT
) High to Low 0 15 mV
V
ACPR
ACPR Pin Output Low Voltage I
ACPR
= 3mA ● 0.5 0.8 V
I
LEAKACPR
ACPR Pin Leakage Current V
IN
= 0, V
ACPR
= 6V ● 1 µA
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 3mA, Charging, C/10 Not Reached ● 0.5 0.8 V
I
LEAKCHRG
CHRG Pin Leakage Current V
IN
= 0, V
CHRG
= 6V ● 1 µA
I
CHRG
CHRG Pin Weak Pull-Down Current V
CHRG
= 1V, Charging, C/10 Reached 20 40 70 µA
ORDER PART
NUMBER
LTC4052EMS8E-4.2
1
2
3
4
8
7
6
5
TOP VIEW
MSE EXPOSED PAD PACKAGE
8-LEAD PLASTIC MSOP
BAT
GATE
CHRG
TIMER
SENSE
ACPR
V
IN
GND
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTYY
DC ELECTRICAL CHARACTERISTICS
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 6V unless otherwise noted.