LTC3824
4
3824fh
For more information www.linear.com/LTC3824
elecTrical characTerisTics
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 LTC3824 is tested under pulsed load conditions such that
T
J
≈ T
A
. The LTC3824E is guaranteed to meet performance specifications
from 0°C to 85°C operating 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 LTC3824I is guaranteed over the –40°C to 125°C operating junction
temperature range. The LTC3824H is guaranteed over the –40°C to 150°C
operating junction temperature range. The LTC3824MP is guaranteed
and tested over the full –55°C to 150°C operating junction temperature
range. High junction temperatures degrade operating lifetimes; operating
lifetime is derated for junction temperatures greater than 125°C. Note that
the maximum ambient temperature consistent with these specifications
is determined by specific operating conditions in conjunction with board
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at T
A
= 25°C (Note 2). V
CC
= 12V, R
SET
= 392k, C
CAP
= 0.1µF. No load on any
outputs, unless otherwise specified.
PARAMETER CONDITIONS MIN TYP MAX UNITS
Gate Driver
GATE Bias Voltage (V
CC
–V
CAP
) 9V ≤ V
CC
≤ 60V, I
GATE
= 10mA: LTC3824E/LTC3824I
LTC3824MP/LTC3824H
l
l
7.0
6.8
7.9
7.9
8.8
8.9
V
V
V
CC
= 12V, I
GATE
= 15mA
l
6.8 V
GATE Bias Voltage (V
CAP
–GND) 4V ≤ V
CC
≤ 8V, I
GATE
= 10mA
6V ≤ V
CC
≤ 8V, I
GATE
= 15mA
l
0.2 0.85 1.5
2.8
V
V
GATE High V
oltage (V
CC
–V
GATE
) 4V ≤ V
CC
≤ 60V, I
GATE
= –15mA 0.5 0.8 V
GATE Peak Source Current C
GATE
= 10nF 2.5 A
GATE Low Voltage (V
GATE
–V
CAP
) 8V ≤ V
CC
≤ 60V, I
GATE
= 15mA
4V ≤ V
CC
< 8V, I
GATE
= 10mA
0.1
0.05
0.5 V
V
GATE Peak Sink Current C
GATE
= 10nF 2.5 A
layout, the rated package thermal impedance and other environmental
factors. The junction temperature (T
J
, in °C) is calculated from the ambient
temperature (T
A
, in °C) and power dissipation (P
D
, in Watts) according to
the formula:
T
J
= T
A
+ (P
D
• θ
JA
)
where θ
JA
(in °C/W) is the package junction to ambient thermal
impedance.
Note 3: This parameter is tested in a feedback loop that servos V
FB
to the
reference voltage with the V
C
pin forced to 1V.
Note 4: This specification represents the maximum voltage on V
C
where
switching (GATE pin) is guaranteed to be off. The nominal value of V
C
where switching turns off is 0.7V.
Note 5: The LTC3824 typically enters Burst Mode operation when the load
is less than one third the current limit. If minimum on-time is violated,
cycle skipping may occur at higher current levels.
