LTC4050
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (VCC) ...................................... 12V
SENSE, DRV, BAT, SEL,
TIMER, PROG, CHRG, ACPR .................– 0.3V to 12V
Operating Temperature Range (Note 2) . – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
PACKAGE/ORDER INFORMATION
BAT 1
NTC 2
CHRG 3
TIMER 4
GND 5
TOP VIEW
10 ACPR
9 SENSE
8 VCC
7 DRV
6 PROG
MS PACKAGE
10-LEAD PLASTIC MSOP
TJMAX = 140°C, θJA = 180°C/W
ORDER PART
NUMBER
LTC4050EMS-4.1
LTC4050EMS-4.2
MS PART MARKING
LTTW
LTTX
Consult LTC Marketing for parts specified with wider operating temperature ranges.
ELECTRICAL CHARACTERISTICS The q denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C. VCC = 6V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
VCC
Input Supply Voltage
ICC
Input Supply Current
Charger On, Current Mode
Shutdown Mode
Sleep Mode (Battery Drain Current)
q 4.5
10
V
q
1.3 3
mA
q
1.3 3
mA
5
15
µA
VBAT
Regulated Output (Float) Voltage in
Constant Voltage Mode
LTC4050-4.1; 5V ≤ VCC ≤ 10V, 0°C ≤ TA ≤ 85°C
LTC4050-4.2; 5V ≤ VCC ≤ 10V, 0°C ≤ TA ≤ 85°C
LTC4050-4.1; 5V ≤ VCC ≤ 10V
LTC4050-4.2; 5V ≤ VCC ≤ 10V
4.059 4.1 4.141
V
4.158 4.2 4.242
V
q 4.039 4.1 4.141
V
q 4.137 4.2 4.242
V
IBAT
Current Mode Charge Current
RPROG = 19.6k, RSENSE = 0.2Ω
RPROG = 19.6k, RSENSE = 0.2Ω
RPROG = 97.6k, RSENSE = 0.2Ω
440 500 535
mA
q 415
585
mA
60 100 140
mA
ITRIKL Trickle Charge Current
VBAT = 2V, RPROG = 19.6k, ITRIKL = (VCC – VSENSE)/0.2Ω q 20
55
90
mA
VTRIKL Trickle Charge Threshold Voltage
q 2.41 2.49 2.58
V
VUV
VCC Undervoltage Lockout Voltage
q
4 4.5
V
∆VUV
VCC Undervoltage Lockout Hysteresis
130
mV
VMSD
PROG Pin Manual Shutdown
Threshold Voltage
3.6
V
VASD
IPROG
VPROG
VACPR
ICHRG
VCHRG
RHOT
RCOLD
Automatic Shutdown Threshold Voltage
PROG Pin Current
PROG Pin Voltage
ACPR Pin Output Low Voltage
CHRG Pin Weak Pull-Down Current
CHRG Pin Output Low Voltage
Thermistor Resistance for Hot Fault
Thermistor Resistance for Cold Fault
(VCC – VBAT) High to Low
(VCC – VBAT) Low to High
Internal Pull-Up Current, No RPROG
PROG Pin Source Current, ∆VPROG ≤ 5mV
RPROG =19.6k
IACPR = 5mA
VCHRG = 1V
ICHRG = 5mA
25 54 85
mV
40 69 100
mV
2.3
µA
q 300
µA
2.47
V
0.525
V
32
µA
0.525
V
3.7 4.1 4.4
kΩ
25 28.5 31
kΩ
4050f
2