LT3840
elecTrical characTerisTics The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at TA = 25°C.
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Power Good
l
l
PG Threshold as a Percentage of V
V
Rising
87
90
2.5
0.1
65
93
%
%
FB
FB
PG Hysteresis as a Percentage of V
PG Leakage
FB
V
V
= 5V
1
µA
µA
PG
PG Sink Current
= 0.3V
35
PG
MOSFET Gate Drivers
Non-Overlap Time TG to BG
Non-Overlap Time BG to TG
TG Minimum On Time
TG Minimum Off Time
TG Maximum Duty Cycle
TG, BG Drive On Voltage
TG, BG Drive Off Voltage
TG, BG Drive Rise Time
TG, BG Drive Fall Time
BOOST UVLO (Rising)
BOOST UVLO Hysteresis
Internal Auxiliary Supply
75
75
ns
ns
ns
ns
%
150
240
99
R = 49.9k
T
7.5
5
V
mV
ns
ns
V
C
C
V
= C = 3300pF
20
TG
BG
= C = 3300pF
20
TG
BG
- V
4.5
5.3
350
BOOST
SW
mV
l
INTV Regulation Voltage
7.25
6.25
7.5
6.5
300
6
7.75
6.75
V
V
CC
INTV UVLO Threshold (Rising)
CC
INTV UVLO Hysteresis
mV
µA
mA
µA
CC
INTV Current in Shutdown
V
= 0.3V
CC
EN
l
INTV Output Current
2.5V ≤ V ≤ 60V (Note 4)
100
CC
IN
INTV Burst Mode Current
V
MODE
= 0V
60
CC
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 LT3840E 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
LT3840I is guaranteed over the –40°C to 125°C operating junction
temperature range. The LT3840H is guaranteed over the full –40°C to
150°C operating junction temperature range. The LT3840MP is 100%
tested and guaranteed over the –55°C to 150°C temperature range. High
junction temperatures degrade operating lifetimes; Operating lifetime is
derated for junction temperatures greater than 125°C.
Note 3: Supply current specification does not include switch drive
currents. Actual supply currents will be higher.
Note 4: Specification is not tested but is guaranteed by design,
characterization and correlation with statistical process controls.
3840fa
4
For more information www.linear.com/LT3840
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