LTC3556_15 Datasheet, PDF (4/36 Pages) Linear Technology – High Effi ciency USB Power Manager with Dual Buck and Buck-Boost DC/DCs

LTC3556
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, V_IN1 = V_IN2 = V_IN3 = V_OUT3 = 3.8V, BAT = 3.8V, DV_CC = 3.3V,
R_PROG = 1k, R_CLPROG = 3.01k, unless otherwise noted.
SYMBOL
PARAMETER
CONDITIONS
MIN TYP MAX UNITS
NTC
V_COLD
V_HOT
V_DIS
Cold Temperature Fault Threshold
Voltage
Hot Temperature Fault Threshold
Voltage
NTC Disable Threshold Voltage
Rising Threshold
Hysteresis
Falling Threshold
Hysteresis
Falling Threshold
Hysteresis
75.0 76.5 78.0 %V_BUS
1.5
%V_BUS
33.4 34.9 36.4 %V_BUS
1.5
%V_BUS
0.7
1.7
2.7
%V_BUS
50
mV
I_NTC
Ideal Diode
NTC Leakage Current
V_NTC = V_BUS = 5V
–50
50
nA
V_FWD
Forward Voltage
V_BUS = 0V, I_OUT = 10mA
I_OUT = 10mA
R_DROPOUT
Internal Diode On-Resistance, Dropout V_BUS = 0V
I_{MAX_DIODE}
Internal Diode Current Limit
Always On 3.3V Supply
2
mV
15
mV
0.18
Ω
1.6
A
V_LDO3V3
Regulated Output Voltage
R_{CL_LDO3V3}
Closed-Loop Output Resistance
R_{OL_LDO3V3}
Dropout Output Resistance
Logic (ENALL, PGOODALL)
0mA < I_LDO3V3 < 25mA
3.1
3.3 3.5
V
4
Ω
23
Ω
V_IL
Logic Low Input Voltage
ENALL Pin
V_IH
Logic High Input Voltage
ENALL Pin
0.4
V
1.2
V
R_PD
V_OL
I_OH
t_PGOODALL
I²C Port (Note 9)
Pull-Down Resistance
Logic Low Output Voltage
Logic High Leakage Current
PGOODALL Assertion Delay
ENALL Pin
PGOODALL Pin, I_PULL-UP = 5mA
PGOODALL Pin, V_PGOODALL = 5V
4.5
MΩ
0.07 0.2
V
1
μA
230
ms
DV_CC
I_DVCC
V_{DVCC_UVLO}
ADDRESS
Input Supply Voltage
DV_CC Current
DV_CC UVLO
I²C Address
SCL/SDA = 0kHz
1.6
5.5
V
0.3
1
μA
1.0
V
0001 001[0]
V_IH SDA, SCL
V_IL SDA, SCL
I_IH, I_IL SDA, SCL
V_OL SDA
f_SCL
t_BUF
Input High Voltage
Input Low Voltage
Input High/Low Current
SDA Output Low Voltage
Clock Operating Frequency
I_SDA = 3mA
Bus Free Time Between Stop and Start
Condition
70
%DV_CC
30 %DV_CC
–1
0
1
μA
0.4
V
400
kHz
1.3
μs
t_{HD_STA}
Hold Time After (Repeated) Start
Condition
0.6
μs
t_{SU_STA}
t_{SU_STO}
Repeated Start Condition Setup Time
Stop Condition Setup Time
0.6
μs
0.6
μs
t_{HD_DAT(O)}
Data Hold Time Output
0
900
ns
3556f
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