Datasheet

LTC3537
4
3537fd
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 LTC3537 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 assured by design, characterization and correlation
with statistical process controls.
Note 3: Specifi cation is guaranteed by design and not 100% tested in
production.
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. (Note 2) V
INL
= 3.3V, V
OLDO
= 3V, unless otherwise noted.
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
PSRR Ripple Rejection f = 2.2MHz at I
LOAD
= 100mA (Note 3) 24 dB
I
SHORT
Short Circuit Current Limit V
OLDO
= 0V
l
110 150 mA
V
ENLDOH
ENLDO Input High Voltage 0.8 V
V
ENLDOL
ENLDO Input Low Voltage 0.3 V
I
ENLDO
ENLDO Input Current V
ENLDO
= 5.5V 1.5 µA
V
PGDLLOW
PGDL Voltage Low I
PGDL
= 5mA 200 mV
I
PGDLLEAK
PGDL Leakage Current V
PGDL
= 5.5V 0.01 1 µA
PGDL Trip Point V
FBL
Rising 96 % V
OLDO
PGDL Hysteresis 3%
Note 4: Current measurements are made when the output is not switching.
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 result in device degradation or failure.
Note 6: Failure to solder the exposed backside of the package to the PC
board ground plane will result in a thermal resistance much higher than
68°C/W.