LT3685 LINER [Linear Technology], LT3685 Datasheet - Page 4

• Manufacturer Part Number: LT3685
• Description: 36V, 4A, 1.5MHz Synchronous Step-Down Switching Regulator
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LT3690
PARAMETER
V
V
V
Transconductance
V
V
Programmable Switching 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 device
reliability and lifetime.
Note 2: Absolute Maximum Voltage at the EN, UVLO and V
for non-repetitive 1 second transients, and 40V for continuous operation.
Note 3: The LT3690E is guaranteed to meet performance specifications
from 0°C to 125°C junction temperature. Specifications over the –40°C
to 125°C operating junction temperature range are assured by design,
characterization and correlation with statistical process controls. The
LT3690I is guaranteed over the full –40°C to 125°C operating junction
temperature range.
temperature range, otherwise specifications are at T
4
C
C
C
C
C
Source Current
Sink Current
Pin to Switch Current Gain
Switching Threshold
Clamp Voltage
CONDITIONS
R
R
R
T
T
T
= 10kΩ
= 24.9kΩ
= 180kΩ
IN
A
pins is 60V
= 25°C, V
The
l
IN
denotes the specifications which apply over the full operating
= 12V unless otherwise noted (Notes 3, 7).
Note 4: This IC includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature will exceed the maximum operating junction temperature
when overtemperature protection is active. Continuous operation above
the specified maximum operating junction temperature may impair device
reliability.
Note 5: This is the minimum voltage across the boost capacitor needed to
guarantee full saturation of the switch.
Note 6: Current limit guaranteed by design and/or correlation to static test.
Slope compensation reduces current limit at higher duty cycles. Current
limit reduced when feedback voltage is below the reference voltage.
Note 7: The voltages are referred to GND and currents are assumed
positive, when the current flows into the pin. Negative magnitudes are
shown as maximum.
MIN
1.32
660
122
TYP
–50
750
138
4.6
0.7
2.0
1.5
50
MAX
1.68
840
154
UNITS
MHz
3690f
kHz
kHz
A/V
µA
µA
V
V