Datasheet

2
LTC1731-8.2/LTC1731-8.4
sn1731 17318fs
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CC
Input Supply Voltage ● 8.8 12 V
I
CC
Input Supply Current Charger On, Current Mode ● 13 mA
Shutdown Mode
● 12 mA
Sleep Mode (Battery Drain Current) 15 30 µA
V
BAT
Regulated Output Voltage LTC1731-8.2 (9V ≤ V
CC
≤ 12V) ● 8.118 8.2 8.282 V
LTC1731-8.4 (9V ≤ V
CC
≤ 12V) ● 8.316 8.4 8.484 V
I
BAT
Current Mode Charge Current R
PROG
= 19.6k, R
SENSE
= 0.2Ω 465 500 535 mA
R
PROG
= 19.6k, R
SENSE
= 0.2Ω ● 415 500 585 mA
R
PROG
= 97.6k, R
SENSE
= 0.2Ω 70 100 130 mA
I
TRIKL
Trickle Charge Current V
BAT
= 4V, R
PROG
= 19.6k, I
TRIKL
= (V
CC
– V
SENSE
)/0.2Ω ● 30 50 100 mA
V
TRIKL
Trickle Charge Threshold Voltage BAT Rising ● 4.7 4.95 5.1 V
V
UV
V
CC
Undervoltage Lockout Voltage V
CC
Rising ● 8.2 8.8 V
∆V
UV
V
CC
Undervoltage Lockout Hysteresis V
CC
Falling 200 mV
V
MSD
Manual Shutdown Threshold Voltage PROG Pin Rising 2.457 V
PROG Pin Falling 2.446 V
I
DRV
Drive Pin Current V
DRV
= V
CC
– 2V 26 µA
ORDER PART
NUMBER
(Note 1)
Input Supply Voltage (V
CC
) ................................... 13.2V
SENSE, DRV, BAT, TIMER, PROG ............ –0.3V to V
CC
CHRG..................................................... –0.3V to 13.2V
LTC1731EMS8-8.2
LTC1731EMS8-8.4
T
JMAX
= 150°C, θ
JA
= 200°C/W
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ABSOLUTE MAXIMUM RATINGS
W
WW
U
PACKAGE/ORDER INFORMATION
W
U
U
Operating Temperature Range (Note 2) .....–40° to 85°C
Storage Temperature Range ................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
MS8 PART MARKING
LTSW
LTPE
1
2
3
4
BAT
CHRG
TIMER
GND
8
7
6
5
SENSE
V
CC
DRV
PROG
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
ORDER PART
NUMBER
LTC1731ES8-8.2
LTC1731ES8-8.4
S8 PART MARKING
173182
173184
The ● denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 9V unless otherwise noted.
ELECTRICAL CHARACTERISTICS
1
2
3
4
8
7
6
5
TOP VIEW
SENSE
V
CC
DRV
PROG
BAT
CHRG
TIMER
GND
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 150°C, θ
JA
= 125°C/W