Datasheet

LTC4002
2
4002f
Supply Voltage (V
CC
) .............................................. 24V
GATE .................................................. (V
CC
–8V) to V
CC
BAT, SENSE .............................................. –0.3V to 14V
CHRG, NTC ................................................. –0.3V to 8V
ORDER PART
NUMBER
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC4002EDD-4.2
LTC4002EDD-8.4
ABSOLUTE AXI U RATI GS
W
WW
U
PACKAGE/ORDER I FOR ATIO
UUW
(Note 1)
T
JMAX
= 125°C, θ
JA
= 110°C/W
1
2
3
4
8
7
6
5
TOP VIEW
NTC
SENSE
BAT
CHRG
COMP
V
CC
GATE
GND
S8 PACKAGE
8-LEAD PLASTIC SO
DD PART MARKING
LAGG
LBGY
Operating Temperature Range (Note 4) .. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (S8 Package)
(Soldering, 10 sec) ........................................... 300°C
TOP VIEW
11
DD PACKAGE
10-LEAD (3mm × 3mm) PLASTIC DFN
10
9
6
7
8
4
5
3
2
1
NC
NTC
SENSE
BAT
CHRG
COMP
V
CC
GATE
PGND
SGND
ORDER PART
NUMBER
LTC4002ES8-4.2
LTC4002ES8-8.4
S8 PART MARKING
400242
400284
ELECTRICAL CHARACTERISTICS
(LTC4002-4.2) The ● denotes the specifications which apply over the full
operating temperature range, otherwise specifications are at T
A
= 25°C. V
CC
= 10V unless otherwise noted.
T
JMAX
= 125°C, θ
JA
= 43°C/W
EXPOSED PAD IS GND (PIN 11)
MUST BE SOLDERED TO PCB
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
DC Characteristics
V
CC
V
CC
Supply Voltage ● 4.7 22 V
I
CC
V
CC
Supply Current Current Mode 3 5 mA
Shutdown Mode 3 5 mA
Sleep Mode 10 20 µA
V
BAT(FLT)
Battery Regulated Float Voltage 5V ≤ V
CC
≤ 22V (Note 2) 4.168 4.2 4.232 V
● 4.158 4.242 V
V
SNS(CHG)
Constant Current Sense Voltage 3V ≤ V
BAT
≤ 4V (Note 3) 0°C ≤ T
A
≤ 85°C ● 93 100 107 mV
–40°C ≤ T
A
≤ 85°C ● 90 110 mV
V
SNS(TRKL)
Trickle Current Sense Voltage V
BAT
= 0V (Note 3) 5 10 15 mV
V
TRKL
Trickle Charge Threshold Voltage V
BAT
Rising 2.75 2.9 3.05 V
V
UV
V
CC
Undervoltage Lockout Threshold Voltage V
CC
Rising 3.9 4.2 4.5 V
∆V
UV
V
CC
Undervoltage Lockout Hysteresis Voltage 200 mV
V
MSD
Manual Shutdown Threshold Voltage COMP Pin Falling 200 360 500 mV
V
ASD
Automatic Shutdown Threshold Voltage V
CC
– V
BAT
250 mV
I
COMP
COMP Pin Output Current V
COMP
= 1.2V 100 µA
I
CHRG
CHRG Pin Weak Pull-Down Current V
CHRG
= 1V 15 25 35 µA
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 1mA 0.15 0.3 V
R
EOC
End-of-Charge Ratio V
SNS(EOC)
/V
SNS(CHG)
10 25 32 %
t
TIMER
Charge Time Accuracy 10 %