LT3015 LINER [Linear Technology], LT3015 Datasheet - Page 6

• Manufacturer Part Number: LT3015
• Description: 1.5A, Low Noise, Negative Linear Regulator
• Manufacturer: LINER [Linear Technology]

LT3015 Series
ELECTRICAL CHARACTERISTICS
temperature range, otherwise specifications are at T
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 LT3015 adjustable version is tested and specified for these
conditions with the ADJ pin connected to the OUT pin.
Note 3: Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current, especially due to the
current limit foldback which starts to decrease current limit at about
|V
voltage range. If operating at maximum input voltage, limit the output
current range.
Note 4: To satisfy minimum input voltage requirements, the LT3015 is
tested and specified for these conditions with an external resistor divider
(54.9k top, 49.9k bottom) for an output voltage of –2.56V. The external
resistor adds 25μA of DC load on the output.
Note 5: Dropout voltage is the minimum input-to-output voltage
differential needed to maintain regulation at a specified output current. In
dropout, the output voltage is: V
Note 6: GND pin current is tested with V
source load. Therefore, the device is tested while operating in dropout.
This is the worst-case GND pin current. GND pin current decreases slightly
at higher input voltages.
Note 7: Positive ADJ pin bias current flows into the ADJ pin.
PARAMETER
ADJ Pin Bias Current (Notes 2, 7) LT3015: V
Shutdown Threshold (Note 11)
SHDN Pin Current (Note 8)
Quiescent Current in Shutdown
Ripple Rejection
V
f
I
Current Limit (Note 14)
Input Reverse Leakage Current
6
RIPPLE
LOAD
RIPPLE
IN
– V
= –1.5A
= 120Hz,
OUT
= 0.5V
| = 8V. If operating at maximum output current, limit the input
P-P
,
IN
+ V
CONDITIONS
V
V
V
V
V
V
V
V
LT3015-2.5: V
LT3015-3: V
LT3015-3.3: V
LT3015-5: V
LT3015-12: V
LT3015-15: V
LT3015: V
V
LT3015-2.5/-3/-3.3/-5/-12/-15: V
LT3015: V
LT3015-2.5/-3/-3.3/-5/-12/-15: V
LT3015: V
OUT
OUT
OUT
OUT
SHDN
SHDN
SHDN
IN
IN
DROPOUT
= –6V, V
= –2.3V, V
IN
= Off-to-On (Positive)
= Off-to-On (Negative)
= On-to-Off (Positive)
= On-to-Off (Negative)
= V
= 0V
= 15V
= –15V
OUT(NOMINAL)
IN
IN
IN
IN
.
SHDN
IN
IN
= –2.3V
= –2.5V (Avg) (Note 2)
= –2.3V, ∆V
= 30V, V
IN
IN
OUT
IN
IN
= –4.5V (Avg)
= –6.5V (Avg)
= –13.5V (Avg)
= –16.5V (Avg)
= –4V (Avg)
= –4.8V (Avg)
= 0V
= 0V
OUT
and a current
OUT
, VADJ, V
A
= 25°C.
= 0.1V
The
IN
IN
SHDN
= V
= 30V, V
l
OUT(NOMINAL)
denotes the specifications which apply over the full operating
= Open Circuit
OUT
Note 8: Positive SHDN pin current flows into the SHDN pin.
Note 9: The LT3015 is tested and specified under pulsed load conditions
such that T
specifications from 0°C to 125°C junction temperature. Specifications over
the –40°C to 125°C operating temperature range are assured by design,
characterization, and correlation with statistical process controls. The
LT3015I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3015MP is 100% tested and guaranteed over
the full –55°C to 125°C operating junction temperature range.
Note 10: Parasitic diodes exist internally between the OUT, ADJ, SHDN
pins and the IN pin. Do not drive the OUT, ADJ, and SHDN pins more that
0.3V below the IN pin during fault conditions, and these pins must remain
at a voltage more positive than IN during normal operation.
Note 11: The SHDN threshold must be met to ensure device operation.
Note 12: For LT3015, the minimum input voltage refers to the lowest
input voltage before the parts goes out of regulation. For the fixed voltage
versions of LT3015, the minimum input voltage refers to the lowest input
voltage before the part can no longer sink 1.5A; for proper regulation, the
dropout voltage requirements must be met.
Note 13: Sense pin current flows out of the pin.
Note 14: The current limit circuit incorporates foldback that decreases
current limit for |V
provided at all V
Performance Characteristics graph for Current Limit vs V
, V
ADJ
– 1V, ∆V
, V
SHDN
J
≅ T
OUT
A
IN
= Open Circuit
. The LT3015E is guaranteed to meet performance
IN
– V
= –5%
– V
OUT
OUT
differential voltages. Please consult the Typical
| ≥ 8V. Some level of output current is
l
l
l
l
l
l
l
l
l
l
l
l
l
–1.34
–200
MIN
1.07
0.5
1.7
1.7
1.7
–1
52
52
51
48
43
40
55
–0.73
1.21
–1.2
0.73
–2.8
0.01
1.55
TYP
30
17
62
62
61
58
53
50
65
0
2
2
2
4
IN
–1.06
– V
MAX
1.35
–0.5
–4.5
200
2.3
2.3
2.3
5.5
1.7
27
1
6
OUT
.
UNITS
3015fb
mA
mA
nA
µA
µA
µA
µA
dB
dB
dB
dB
dB
dB
dB
V
V
V
V
A
A
A