LTC4050 Datasheet, PDF (2/12 Pages) Linear Technology – Lithium-Ion Linear Battery Charger with Thermistor Interface

LTC4050
ABSOLUTE MAXIMUM RATINGS
(Note 1)
Input Supply Voltage (V_CC) ...................................... 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 V_CC
7 DRV
6 PROG
MS PACKAGE
10-LEAD PLASTIC MSOP
T_JMAX = 140°C, θ_JA = 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 T_A = 25°C. V_CC = 6V unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
V_CC
Input Supply Voltage
I_CC
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
V_BAT
Regulated Output (Float) Voltage in
Constant Voltage Mode
LTC4050-4.1; 5V ≤ V_CC ≤ 10V, 0°C ≤ T_A ≤ 85°C
LTC4050-4.2; 5V ≤ V_CC ≤ 10V, 0°C ≤ T_A ≤ 85°C
LTC4050-4.1; 5V ≤ V_CC ≤ 10V
LTC4050-4.2; 5V ≤ V_CC ≤ 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
I_BAT
Current Mode Charge Current
R_PROG = 19.6k, R_SENSE = 0.2Ω
R_PROG = 19.6k, R_SENSE = 0.2Ω
R_PROG = 97.6k, R_SENSE = 0.2Ω
440 500 535
mA
q 415
585
mA
60 100 140
mA
I_TRIKL Trickle Charge Current
V_BAT = 2V, R_PROG = 19.6k, I_TRIKL = (V_CC – V_SENSE)/0.2Ω q 20
55
90
mA
V_TRIKL Trickle Charge Threshold Voltage
q 2.41 2.49 2.58
V
V_UV
V_CC Undervoltage Lockout Voltage
q
4 4.5
V
∆V_UV
V_CC Undervoltage Lockout Hysteresis
130
mV
V_MSD
PROG Pin Manual Shutdown
Threshold Voltage
3.6
V
V_ASD
I_PROG
V_PROG
V_ACPR
I_CHRG
V_CHRG
R_HOT
R_COLD
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
(V_CC – V_BAT) High to Low
(V_CC – V_BAT) Low to High
Internal Pull-Up Current, No R_PROG
PROG Pin Source Current, ∆V_PROG ≤ 5mV
R_PROG =19.6k
I_ACPR = 5mA
V_CHRG = 1V
I_CHRG = 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