Datasheet

LTC3101
4
3101fb
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
USB1
= V
USB2
= V
BAT1
= V
BAT2
= 3V and V
OUT3
= 3.3V, unless
otherwise noted.
PARAMETER CONDITIONS MIN TYP MAX UNITS
N-Channel Switch Leakage V
SW3A,B
= V
USB1,2
= V
BAT1,2
= V
OUT3
= 5.5V 0.1 5 µA
P-Channel Switch Leakage V
SW3A,B
= 0V, V
USB1,2
= V
BAT1,2
= V
OUT3
= 5.5V 0.1 10 µA
Power Good Threshold V
FB3
Falling
l
–11.5 –8.5 –5.5 %
Power Good Hysteresis 2.5 %
MAX Output
Current Limit V
MAX
= 2.0V
l
200 300 mA
Switch Resistance From BAT2 to MAX
From USB2 to MAX
0.890
0.930


Load Dependent Supply Current 1.0 µA/mA
LDO Output
Output Voltage I
LDO
= 1mA
l
1.755 1.800 1.845 V
Current Limit V
LDO
= 1.0V
l
50 110 mA
Line Regulation Input Voltage (V
MAX
) = 1.8V to 5.5V, I
LDO
= 1mA 0.1 %
Load Regulation I
LDO
= 1mA to 50mA 0.9 %
Reverse Current in Shutdown V
BAT1,2
= V
USB1,2
= 0V, V
LDO
= 1.8V 0.1 1 µA
Load Dependent Supply Current 12 µA/mA
Dropout Voltage V
MAX
= 1.75V, I
LDO
= 10mA 25 mV
Hot Swap Output
Switch Resistance 0.730 
Switch Current Limit V
HSO
= 2.0V
l
100 150 mA
Pushbutton Logic and µP Reset Generator
PBSTAT Deglitching Duration 15 24 ms
PBSTAT Low Voltage I
PBSTAT
= 1mA 20 50 mV
RESET Low Voltage I
RESET
= 1mA 20 50 mV
C
RS
Pin Charging Current 0.9 1.0 1.1 µA
C
RS
Pin Threshold Voltage V
CRS
Rising 1.176 1.200 1.224 V
Logic Inputs
PWRKEY, PWRON, PWM Input Logic Threshold
l
0.3 0.7 1.0 V
PWRKEY Pull-Up Resistance 400 k
PWRON Pull-Down Resistance 4.0 M
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTC3101 is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are ensured by design, characterization and correlation
with statistical process controls.
Note 3: Current measurements are performed when the LTC3101 is
not switching. The current limit values measured in operation will be
somewhat higher due to the propagation delay of the comparators.
Note 4: The LTC3101 is tested in a proprietary non-switching test mode
that internally connects the error amplifi ers in a closed-loop confi guration.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed 125°C when overtemperature protection is active.
Continuous operation above the specifi ed maximum operating junction
temperature may impair device reliability.