lt3695 Linear Technology Corporation, lt3695 Datasheet - Page 4

• Manufacturer Part Number: lt3695
• Description: 1a Fault Tolerant Micropower Step-down Regulator
• Manufacturer: Linear Technology Corporation

ELECTRICAL CHARACTERISTICS
LT3695
temperature range, otherwise specifi cations are at T
PARAMETER
Boost Schottky Diode Voltage Drop
Boost Schottky Diode Reverse Leakage
Minimum Boost Voltage (Note 8)
BOOST Pin Current
RUN/SS Pin Current
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
PG Leakage Current
PG Sink Current
PG Threshold as % of V
PG Threshold Hysteresis
SYNC Threshold Voltage
SYNC Input Frequency
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 the device
reliability and lifetime.
Note 2: Positive currents fl ow into pins, negative currents fl ow out of pins.
Minimum and maximum values refer to absolute values.
Note 3: Absolute maximum voltage at V
nonrepetitive 1 second transients, and 36V for continuous operation.
Note 4: The LT3695E 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
LT3695I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3695H is guaranteed over the full –40°C to
150°C operating junction temperature range.
4
FB
IN
and RUN/SS pins is 60V for
CONDITIONS
I
V
I
V
V
V
V
Measured at FB Pin (Pin Voltage Rising)
Measured at FB Pin
BSD
SW
SW
RUN/SS
RUN/SS
PG
PG
= 0.5A
= 5V
= 0.4V
= 50mA
= 10V, V
A
= 2.5V
= 10V
= 25°C. V
BD
The
= 0V
l
IN
denotes the specifi cations which apply over the full operating
= 10V, V
Note 5: This IC includes overtemperature protection that is intended to
protect the devices during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specifi ed maximum operating junction temperature may impair device
reliability.
Note 6: This is the voltage necessary to keep the internal bias circuitry in
regulation.
Note 7: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycles.
Note 8: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
RUN/SS
= 10V, unless otherwise noted. (Note 4)
l
l
l
MIN
100
300
2.5
0.3
88
1000
10.5
TYP
720
550
0.1
1.7
4.5
0.1
12
90
12
MAX
17.5
900
800
2.3
7.5
0.2
2.2
20
92
1
1
UNITS
MHz
3695f
mV
mA
mV
mV
μA
μA
μA
μA
μA
%
V
V
V