LTC3555 Datasheet, PDF (4/32 Pages) Linear Technology – High Effi ciency USB Power Manager + Triple Step-Down DC/DC

LTC3555/LTC3555-X
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T_A = 25°C. V_BUS = 5V, BAT = 3.8V, DV_CC = 3.3V, R_PROG = 1k, R_CLPROG = 3k,
unless otherwise noted.
SYMBOL
V_CHRG
I_CHRG
PARAMETER
CHRG Pin Output Low Voltage
CHRG Pin Leakage Current
CONDITIONS
I_CHRG = 5mA
V_CHRG = 5V
R_{ON_CHG}
T_LIM
NTC
Battery Charger Power FET On
Resistance (Between V_OUT and BAT)
Junction Temperature in Constant
Temperature Mode
V_COLD
V_HOT
V_DIS
I_NTC
Ideal Diode
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Threshold Voltage
NTC Leakage Current
Rising Threshold
Hysteresis
Falling Threshold
Hysteresis
Falling Threshold
Hysteresis
V_NTC = V_BUS = 5V
V_FWD
Forward Voltage
V_BUS = 0V, I_VOUT = 10mA
I_VOUT = 10mA
R_DROPOUT
Internal Diode On Resistance, Dropout V_BUS = 0V
I_{MAX_DIODE}
Internal Diode Current Limit
Always On 3.3V LDO Supply
V_LDO3V3
Regulated Output Voltage
R_{CL_LDO3V3}
Closed-Loop Output Resistance
R_{OL_LDO3V3}
Dropout Output Resistance
Logic (I_LIM0, I_LIM1, EN1, EN2, EN3)
V_IL
Logic Low Input Voltage
V_IH
Logic High Input Voltage
I_PD1
I²C Port
I_LIM0, I_LIM1, EN1, EN2, EN3
Pull-Down Currents
0mA < I_LDO3V3 < 25mA
DV_CC
I_DVCC
V_{DVCC_UVLO}
ADDRESS
Input Supply Voltage
DV_CC Current
DV_CC UVLO
I²C Address
SCL/SDA = 0kHz
V_IH, SDA, SCL
V_IL, SDA, SCL
I_PD2 SDA, SCL
V_OL
f_SCL
t_BUF
t_{HD_STA}
t_{SU_STA}
Input High Threshold
Input Low Threshold
Pull-Down Current
Digital Output Low (SDA)
Clock Operating Frequency
I_PULLUP = 3mA
Bus Free Time Between Stop and Start
Condition
Hold Time After (Repeated) Start
Condition
Repeated Start Condition Setup Time
MIN TYP
65
0.18
110
MAX UNITS
100
mV
1
μA
Ω
°C
75.0 76.5
1.5
33.4 34.9
1.5
0.7
1.7
50
–50
78.0 %V_BUS
%V_BUS
36.4 %V_BUS
%V_BUS
2.7 %V_BUS
mV
50
nA
2
mV
15
mV
0.18
Ω
1.6
A
3.1
3.3
3.5
V
4
Ω
23
Ω
0.4
V
1.2
V
2
μA
1.6
5.5
0.5
1.0
0001 001[0]
70
30
2
0.4
400
1.3
V
μA
V
%DV_CC
%DV_CC
μA
V
kHz
μs
0.6
μs
0.6
μs
3555fd
4