Datasheet
LTC3555/LTC3555-X
4
3555fd
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
CHRG
CHRG Pin Output Low Voltage I
CHRG
= 5mA 65 100 mV
I
CHRG
CHRG Pin Leakage Current V
CHRG
= 5V 1 µA
R
ON_CHG
Battery Charger Power FET On
Resistance (Between V
OUT
and BAT)
0.18 Ω
T
LIM
Junction Temperature in Constant
Temperature Mode
110 °C
NTC
V
COLD
Cold Temperature Fault Threshold
Voltage
Rising Threshold
Hysteresis
75.0 76.5
1.5
78.0 %V
BUS
%V
BUS
V
HOT
Hot Temperature Fault Threshold
Voltage
Falling Threshold
Hysteresis
33.4 34.9
1.5
36.4 %V
BUS
%V
BUS
V
DIS
NTC Disable Threshold Voltage Falling Threshold
Hysteresis
0.7 1.7
50
2.7 %V
BUS
mV
I
NTC
NTC Leakage Current V
NTC
= V
BUS
= 5V –50 50 nA
Ideal Diode
V
FWD
Forward Voltage V
BUS
= 0V, I
VOUT
= 10mA
I
VOUT
= 10mA
2
15
mV
mV
R
DROPOUT
Internal Diode On Resistance, Dropout V
BUS
= 0V 0.18 Ω
I
MAX_DIODE
Internal Diode Current Limit 1.6 A
Always On 3.3V LDO Supply
V
LDO3V3
Regulated Output Voltage 0mA < I
LDO3V3
< 25mA 3.1 3.3 3.5 V
R
CL_LDO3V3
Closed-Loop Output Resistance 4 Ω
R
OL_LDO3V3
Dropout Output Resistance 23 Ω
Logic (I
LIM0
, I
LIM1
, EN1, EN2, EN3)
V
IL
Logic Low Input Voltage 0.4 V
V
IH
Logic High Input Voltage 1.2 V
I
PD1
I
LIM0
, I
LIM1
, EN1, EN2, EN3
Pull-Down Currents
2 µA
I
2
C Port
DV
CC
Input Supply Voltage 1.6 5.5 V
I
DVCC
DV
CC
Current SCL/SDA = 0kHz 0.5 µA
V
DVCC_UVLO
DV
CC
UVLO 1.0 V
ADDRESS I
2
C Address 0001 001[0]
V
IH
, SDA, SCL Input High Threshold 70 %DV
CC
V
IL
, SDA, SCL Input Low Threshold 30 %DV
CC
I
PD2
SDA, SCL Pull-Down Current 2 µA
V
OL
Digital Output Low (SDA) I
PULLUP
= 3mA 0.4 V
f
SCL
Clock Operating Frequency 400 kHz
t
BUF
Bus Free Time Between Stop and Start
Condition
1.3 µs
t
HD_STA
Hold Time After (Repeated) Start
Condition
0.6 µs
t
SU_STA
Repeated Start Condition Setup Time 0.6 µs
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.