LTC3554 Datasheet, PDF (3/36 Pages) Linear Technology – Micropower USB Power Manager with Li-Ion Charger and Two Step-Down Regulators

LTC3554
POWER MANAGER ELECTRICAL CHARACTERISTICS
The l denotes specifications that apply over the full operating temperature range, otherwise specifications are at T_A = 25°C,
V_BUS = 5V, V_BAT = 3.8V, HPWR = SUSP = PWR_ON1 = PWR_ON2 = 0V, R_PROG = 1.74k, STBY = High
SYMBOL PARAMETER
CONDITIONS
MIN TYP MAX UNITS
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
0 ≤ T_A ≤ 85°C
R_PROG = 1.74k
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)
Battery Charger Power FET
On-Resistance (Between V_OUT and BAT)
Junction Temperature in Constant
Temperature Mode
I_BAT = 200mA
4.179 4.2
4.165 4.2
l 410 431
1
0.1
750
34
43
2.9
2.6 2.75
–85 –100
3.2
4
0.4
0.5
0.085 0.1
220
4.221
4.235
453
52
3
–115
4.8
0.6
0.115
V
V
mA
V
V
mA/mA
mA
V
V
mV
Hour
Hour
mA/mA
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
1.3
34
35
1.3
l 1.2
1.7
50
77
%V_BUS
%V_BUS
36
%V_BUS
%V_BUS
2.2
%V_BUS
mV
I_NTC
NTC Leakage Current
Ideal Diode
V_NTC = V_BUS = 5V
–50
50
nA
V_FWD
Forward Voltage Detection
R_DROPOUT Diode On-Resistance, Dropout
I_MAX
Diode Current Limit
Logic Inputs (HPWR, SUSP)
(Note 12)
I_OUT = 200mA, V_BUS = 0V
(Note 7)
15
mV
240
mΩ
1
A
V_IL
Input Low Voltage
V_IH
Input High Voltage
R_PD
Internal Pull-Down Resistance
Logic Output (CHRG)
0.4
V
1.2
V
4
MΩ
V_OL
I_CHRG
Output Low Voltage
Output Hi-Z Leakage Current
I_CHRG = 5mA
V_BAT = 4.5V, V_CHRG = 5V
65
100
mV
0
1
μA
3554p
3