LTC3553-2_15 Datasheet, PDF (3/36 Pages) Linear Technology – Micropower USB Power Manager with Li-Ion Charger, Always-On LDO and Buck Regulator

LTC3553-2
POWER MANAGER ELECTRICAL CHARACTERISTICS
The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C (Note 2),
V_BUS = 5V, V_BAT = 3.8V, HPWR = SUSP = BUCK_ON = 0V, R_PROG = 1.87k, STBY = high, unless otherwise noted.
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
I_BVINQ
BVIN Input Current
Buck Shutdown
Buck Enabled, Standby Mode
Buck Enabled
V_BUS = 0V, V_BVIN = 3.8V, I_SW = 0 (Note 8)
BUCK_ON = 0V
BUCK_ON = STBY = 3.8V
BUCK_ON = 3.8V, STBY = 0V
0.01
1
μA
1.5
3
μA
22
38
μA
I_VINLDOQ
V_INLDO Input Current
LDO Shutdown (Hard Reset)
LDO Enabled
V_BUS = 0V, V_INLDO = 3.8V, I_LDO = 0 (Note 10)
0.01
1
μA
0.1
1
μA
Input Power Supply
V_BUS
I_BUS(LIM)
Input Supply Voltage
Total Input Current
HPWR = 0V (100mA)
HPWR = 5V (500mA)
4.35
5.5
V
l 80
90
100
mA
l 400
450
500
mA
V_UVLO
V_BUS Undervoltage Lockout
Rising Threshold
Falling Threshold
3.8
3.9
V
3.5
3.6
mV
V_DUVLO
V_BUS to BAT Differential Undervoltage
Lockout
Rising Threshold
Falling Threshold
200
300
mV
0
50
mV
R_{ON_ILIM}
Input Current Limit Power FET
On-Resistance (Between V_BUS and V_OUT)
Battery Charger
350
mΩ
V_FLOAT
I_CHG
V_PROG
V_PROG,TRKL
h_PROG
I_TRKL
V_TRKL
ΔV_RECHRG
t_TERM
t_BADBAT
h_C/10
R_{ON_CHG}
T_LIM
V_BAT Regulated Output Voltage
Constant-Current Mode Charge Current
PROG Pin Servo Voltage
PROG Pin Servo Voltage in Trickle Charge
Ratio of I_BAT to PROG Pin Current
Trickle Charge Current
Trickle Charge Threshold Voltage
Recharge Battery Threshold Voltage
Safety Timer Termination Period
Bad Battery Termination Time
End-of-Charge Indication Current Ratio
Battery Charger Power FET
On-Resistance (Between V_OUT and BAT)
Junction Temperature in Constant
Temperature Mode
0 ≤ T_A ≤ 85°C
R_PROG = 1.87k, 0 ≤ T_A ≤ 85°C
V_BAT < V_TRKL
V_BAT < V_TRKL
V_BAT Rising
V_BAT Falling
Threshold Voltage Relative to V_FLOAT
Timer Starts when V_BAT = V_FLOAT – 50mV
V_BAT < V_TRKL
(Note 6)
I_BAT = 200mA
4.179 4.2 4.221
V
4.165 4.2 4.235
V
380 400
420
mA
1
V
0.1
V
750
mA/mA
30
40
50
mA
2.9
3
V
2.6 2.75
V
–75 –100 –125
mV
3.2
4
5
Hour
0.4
0.5
0.63
Hour
0.085 0.1 0.115 mA/mA
220
mΩ
110
°C
NTC
V_COLD
V_HOT
V_DIS
Cold Temperature Fault Threshold
Voltage
Rising NTC Voltage
Hysteresis
Hot Temperature Fault Threshold Voltage Falling NTC Voltage
Hysteresis
NTC Disable Threshold Voltage
Falling NTC Voltage
Hysteresis
75
76
77
%V_BUS
1.3
%V_BUS
34
35
1.3
36
%V_BUS
%V_BUS
l 1.2
1.7
2.2 %V_BUS
50
mV
I_NTC
NTC Leakage Current
V_NTC = V_BUS = 5V
–50
50
nA
35532f
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