Datasheet

LT3082
3
3082f
ELECTRICAL CHARACTERISTICS
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
J
= 25°C. (Note 2)
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: Unless otherwise specifi ed, all voltages are with respect to V
OUT
.
The LT3082E is tested and specifi ed under pulse load conditions such
that T
J
≅ T
A
. The LT3082E is 100% tested at T
A
= 25°C. Performance at
–40°C and 125°C is assured by design, characterization, and correlation
with statistical process controls. The LT3082I is guaranteed to meet all
data sheet specifi cations over the full –40°C to 125°C operating junction
temperature range. The LT3082MP is 100% tested and guaranteed over
the –55°C to 125°C operating junction temperature range.
Note 3: Minimum load current is equivalent to the quiescent current of
the part. Since all quiescent and drive current is delivered to the output
of the part, the minimum load current is the minimum current required to
maintain regulation.
Note 4: For the LT3082, dropout is specifi ed as the minimum input-to-
output voltage differential required supplying a given output current.
Note 5: Adding a small capacitor across the reference current resistor
lowers output noise. Adding this capacitor bypasses the resistor shot
noise and reference current noise; output noise is then equal to error
amplifi er noise (see the Applications Information section).
Note 6: Diodes with series 1k resistors clamp the SET pin to the OUT pin.
These diodes and resistors only carry current under transient overloads.
Note 7: Load regulation is Kelvin-sensed at the package.
Note 8: This IC includes overtemperature protection that protects the
device during momentary overload conditions. Junction temperature
exceeds the maximum operating junction temperature when
overtemperature protection is active. Continuous operation above the
specifi ed maximum operating junction temperature may impair device
reliability.
PARAMETER CONDITIONS MIN TYP MAX UNITS
SET Pin Current I
SET
V
IN
= 2V, I
LOAD
= 1mA
2V ≤ V
IN
≤ 40V, 1mA ≤ I
LOAD
≤ 200mA
l
9.90
9.80
10
10
10.10
10.20
µA
µA
Offset Voltage (V
OUT
– V
SET
) V
OS
V
IN
= 2V, I
LOAD
= 1mA
V
IN
= 2V, I
LOAD
= 1mA
l
–2
–4
2
4
mV
mV
Load Regulation (Note 7) ∆I
SET
∆V
OS
∆I
LOAD
= 1mA to 200mA
∆I
LOAD
= 1mA to 200mA
l
–0.1
–0.5 –2
nA
mV
Line Regulation ∆I
SET
∆V
OS
∆V
IN
= 2V to 40V, I
LOAD
= 1mA
∆V
IN
= 2V to 40V, I
LOAD
= 1mA
0.03
0.003
0.2
0.010
nA/V
mV/V
Minimum Load Current (Note 3) 2V ≤ V
IN
≤ 40V
l
300 500 µA
Dropout Voltage (Note 4) I
LOAD
= 10mA
I
LOAD
= 200mA
l
l
1.22
1.3
1.45
1.65
V
V
Current Limit V
IN
= 5V, V
SET
= 0V, V
OUT
= –0.1V
l
200 300 mA
Error Amplifi er RMS Output Noise (Note 5) I
LOAD
= 200mA, 10Hz ≤ f ≤ 100kHz, C
OUT
= 10µF,
C
SET
= 0.1µF
33 µV
RMS
Reference Current RMS Output Noise (Note 5) 10Hz ≤ f ≤ 100kHz 0.7 nA
RMS
Ripple Rejection f = 120Hz, V
RIPPLE
= 0.5V
P-P
, I
LOAD
= 0.1A,
C
OUT
= 2.2µF, C
SET
= 0.1µF
f = 10kHz
f = 1MHz
90
75
20
dB
dB
dB
Thermal Regulation I
SET
10ms Pulse 0.003 %/W