LT3681
ELECTRICAL CHARACTERISTICS
noted. (Note 2)
The
●
denotes the specifications which apply over the full operating
= 10V V = 15V, V = 3.3V unless otherwise
temperature range, otherwise specifications are at T = 25°C. V = 10V, V
A
IN
RUNS/SS
BOOST
BIAS
MIN
PARAMETER
CONDITIONS
TYP
MAX
UNITS
Power Schottky Diode Forward Voltage
I
DA
I
DA
= 1A
= 2A
0.50
0.56
V
V
Power Schottky Diode Leakage Current
Switching Frequency
V
= 40V
100
μA
DC-DA
RT = 8.66k
RT = 29.4k
RT = 187k
2.5
1.25
250
2.8
1.4
300
3.1
1.55
350
MHz
MHz
kHz
●
●
Minimum Switch Off-Time
Switch Current Limit
130
3.8
360
0.02
1.5
18
200
4.4
nS
A
Duty Cycle = 5%
3.2
Switch V
I
= 2A
SW
mV
µA
V
CESAT
Boost Schottky Reverse Leakage
Minimum Boost Voltage (Note 4)
BOOST Pin Current
V
SW
= 10V, V
= 0V
BIAS
2
2.1
35
10
I
SW
= 1A
mA
μA
V
RUN/SS Pin Current
V
= 2.5V
5
RUN/SS
RUN/SS Input Voltage High
RUN/SS Input Voltage Low
PG Threshold Offset from Feedback Voltage
PG Hysteresis
2.5
0.2
1
V
V
FB
Rising
122
5
mV
mV
μA
μA
PG Leakage
V
V
= 5V
0.1
600
PG
●
PG Sink Current
= 3V
100
PG
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 3: Bias current flows into the FB pin.
Note 4: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 2: The LT3681E is guaranteed to meet performance specifications
from 0°C to 85°C. Specifications over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
3681f
3
Linear [ Linear ]
