LTC4057 Datasheet, PDF (2/12 Pages) Linear Technology – Linear Li-Ion Battery Charger with Thermal Regulation in ThinSOT

LTC4057- 4.2
ABSOLUTE AXI U RATI GS
(Note 1)
Input Supply Voltage (V_CC) ........................– 0.3V to 10V
PROG .............................................. – 0.3V to V_CC + 0.3V
BAT ..............................................................– 0.3V to 7V
SHDN .........................................................– 0.3V to 10V
BAT Short Circuit Duration ........................... Continuous
BAT Pin Current .................................................. 800mA
PROG Pin Current ................................................ 800µA
Junction Temperature ........................................... 125°C
Operating Ambient Temperature Range
(Note 2) .............................................. – 40°C to 85°C
Storage Temperature Range ................. – 65°C to 125°C
Lead Temperature (Soldering, 10 sec).................. 300°C
UW U
PACKAGE/ORDER I FOR ATIO
TOP VIEW
SHDN 1
GND 2
BAT 3
5 PROG
4 V_CC
S5 PACKAGE
5-LEAD PLASTIC SOT-23
T_JMAX = 125°C, (θ_JA = 100°C/W TO 150°C/W
DEPENDING ON PC BOARD LAYOUT)
(NOTE 3)
ORDER PART
NUMBER
LTC4057ES5-4.2
S5 PART
MARKING
LTAEW
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 = 5V
SYMBOL
V_CC
I_CC
V_FLOAT
I_BAT
I_TRIKL
V_TRIKL
V_UV
V_ASD
V_PROG
V_SHDN-IL
V_SHDN-IH
I_SHDN
T_LIM
R_ON
t_SS
PARAMETER
Input Supply Voltage
Input Supply Current
Regulated Output (Float) Voltage
BAT Pin Charge Current
Trickle Charge Current
Trickle Charge Threshold Voltage
V_CC Undervoltage Lockout Voltage
V_CC - V_BAT Lockout Threshold Voltage
PROG Pin Voltage
SHDN Pin Input Low Voltage
SHDN Pin Input High Voltage
SHDN Pin Input Current
Junction Temperature in
Constant-Temperature Mode
Power FET “ON” Resistance
(Between V_CC and BAT)
Soft-Start Time
CONDITIONS
I_BAT = 0mA, R_PROG = 2k
Shutdown Mode (SHDN = 0V,
V_CC < V_BAT, or V_CC < V_UV)
I_BAT = 40mA, 0°C < T_A < 85°C
R_PROG = 10k; Current Mode
R_PROG = 2k; Current Mode
Shutdown Mode (SHDN = 0V)
Sleep Mode (V_CC = 0V)
V_BAT < 2.9V; R_PROG = 2k (I_CHG = 500mA)
R_PROG = 10k; V_BAT Rising
Hysteresis
From Low to High
Hysteresis
V_CC from Low to High
V_CC from High to Low
R_PROG = 10k; Current Mode
V_SHDN = 5V
I_BAT = 0 to I_BAT = 1000V/R_PROG
MIN TYP MAX UNITS
q 4.25
6.5
V
q
200 600
µA
q
50
µA
4.158 4.2 4.242
V
q 93
100 107
mA
q 465
500
535
mA
±1
±2
µA
±1
±2
µA
q 20
50
70
mA
2.8
2.9
3.0
V
60
80
110
mV
q 3.7
3.8
3.9
V
q 150
200
300
mV
70
100 150
mV
5
30
70
mV
q 0.93
1.0
1.07
V
0.4 0.65
V
0.65 1.0
V
q
5
15
µA
120
°C
600
mΩ
100
µs
4057f
2