lt3681 Linear Technology Corporation, lt3681 Datasheet - Page 3

• Manufacturer Part Number: lt3681
• Description: 36v, 2a, 2.8mhz Step-down Switching Regulator With Integrated Power Schottky Diode
• Manufacturer: Linear Technology Corporation

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