Datasheet

LT3507
4
3507fa
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
IN1
, V
IN2
, V
IN3
= 12V, V
BOOST1
, V
BOOST2
, V
BOOST3
= 17V, unless
otherwise noted (Note 2)
PARAMETER CONDITIONS MIN TYP MAX UNITS
Load Regulation I
DRIVE
from 0.1mA to 10mA 0.005 %/mA
DRIVE Output Current Limit
l
10 15 22.5 mA
Dropout Voltage, V
IN1
to DRIVE I
DRIVE
= 10mA 1.7 2.0 V
Dropout Voltage, BIAS to DRIVE I
DRIVE
= 10mA 0.5 0.8 V
Over/Undervoltage Lockout
Undervoltage Lockout Threshold 1.15 1.20 1.25 V
Overvoltage Lockout Threhold 1.15 1.20 1.25 V
Undervoltage Lockout Hysteresis Current V(UVLO) < 1.2V 7 10 13 μA
Overvoltage Lockout Hysteresis Current V(OVLO) > 1.2V –7 –10 –13 μA
Input Bias Current (OVLO and UVLO) –100 –200 nA
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 LT3507E is guaranteed to meet performance specifi cations
from 0°C to 125°C junction temperature. Specifi cations over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3507I is guaranteed to meet performance specifi cations from –40°C
to 125°C junction temperature. The LT3507H is guaranteed over the full
–40°C to 150°C operating junction temperature range. High junction
temperatures degrade operating lifetimes. Operating lifetime is derated at
junction temperatures greater than 125°C.
Note 3: Current limit is guaranteed by design and/or correlation to static
test. Slope compensation reduces current limit at higher duty cycles.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the internal power switch.
Note 5: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions.
Junction temperature will exceed the maximum operating range when
overtemperature protection is active. Continuous operation above the
specifi ed maximum operating junction temperature may impair device
reliability.