Datasheet
LT3042
5
3042fb
For more information www.linear.com/LT3042
TYPICAL PERFORMANCE CHARACTERISTICS
Offset Voltage SET Pin Current Offset Voltage (V
OUT
– V
SET
)
SET Pin Current SET Pin Current Offset Voltage (V
OUT
– V
SET
)
T
J
= 25°C, unless otherwise noted.
ELECTRICAL CHARACTERISTICS
Note 10: Parasitic diodes exist internally between the ILIM, PG, PGFB, SET,
OUTS, and OUT pins and the GND pin. Do not drive these pins more than
0.3V below the GND pin during a fault condition. These pins must remain
at a voltage more positive than GND during normal operation.
Note 11: The current limit programming scale factor is specified while the
internal backup current limit is not active. Note that the internal current
limit has foldback protection for V
IN
– V
OUT
differentials greater than 12V.
Note 12: The internal back-up current limit circuitry incorporates foldback
protection that decreases current limit for V
IN
– V
OUT
> 12V. Some level of
output current is provided at all V
IN
– V
OUT
differential voltages. Consult
the Typical Performance Characteristics graph for current limit vs V
IN
–
V
OUT
.
Note 13: For output voltages less than 1V, the LT3042 requires a 10µA
minimum load current for stability.
Note 14: Maximum OUT-to-OUTS differential is guaranteed by design.
Note 15: The PSRR at 120Hz is guaranteed by design, characterization,
and correlation with statistical process controls.
TEMPERATURE (°C)
–75
SET PIN CURRENT (µA)
101.0
99.2
100.8
100.4
100.0
99.6
100.6
100.2
99.8
99.4
99.0
25 125–25 75
3042 G01
150
0 100–50 50
V
IN
= 2V
I
L
= 1mA
V
OUT
= 1.3V
TEMPERATURE (°C)
–75
OFFSET VOLTAGE (mV)
2.0
1.5
0.5
–0.5
–1.5
1.0
0
–1.0
–2.0
25 125–25 75
3042 G03
150
0 100–50 50
V
IN
= 2V
I
L
= 1mA
V
OUT
= 1.3V
I
SET
DISTRIBUTION (µA)
98
10199
3042 G02
102
100
N = 4354
V
OS
DISTRIBUTION (mV)
–2
1–1
3042 G04
2
0
N = 4354
SET PIN CURRENT (µA)
101.0
99.2
100.8
100.4
100.0
99.6
100.6
100.2
99.8
99.4
99.0
INPUT VOLTAGE (V)
0 10 186 14
3042 G05
20
8 164 122
I
L
= 1mA
V
OUT
= 1.3V
150°C
125°C
25°C
–55°C
INPUT VOLTAGE (V)
0
OFFSET VOLTAGE (mV)
2.0
–1.5
1.5
0.5
–0.5
1.0
0
–1.0
–2.0
10 186 14
3042 G06
20
8 164 122
I
L
= 1mA
V
OUT
= 1.3V
150°C
125°C
25°C
–55°C
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