LT3015 Series
1.5A, Low Noise,
Negative Linear Regulator
with Precision Current Limit
FEATURES DESCRIPTION
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Output Current: 1.5A The LT 3015 series are low noise, low dropout, negative
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Dropout Voltage: 310mV linear regulators with fast transient response. The devices
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Precision Current Limit with Foldback supply up to 1.5A of output current at a typical dropout
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Low Output Noise: 60V (10Hz to 100kHz) voltage of 310mV. Operating quiescent current is typically
RMS
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Low Quiescent Current: 1.1mA 1.1mA and drops to < 1A in shutdown. Quiescent current
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Precision Positive or Negative Shutdown Logic is also well controlled in dropout. In addition to fast tran-
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Fast Transient Response sient response, the LT3015 series exhibit very low output
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Wide Input Voltage Range: 1.8V to 30V noise, making them ideal for noise sensitive applications.
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Adjustable Output Voltage Range: 1.22V to 29.3V
The LT3015 regulators are stable with a minimum 10F
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Fixed Output Voltages: 2.5V, 3V, 3.3V, 5V, 12V, 15V
output capacitor. Moreover, the regulator can use small
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Controlled Quiescent Current in Dropout
ceramic capacitors without the necessary addition of ESR
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<1A Quiescent Current in Shutdown
as is common with other regulators. Internal protection
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Stable with 10F Output Capacitor
circuitry includes reverse output protection, precision cur-
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Stable with Ceramic, Tantalum or Aluminum Capacitors
rent limit with foldback and thermal limit with hysteresis.
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Thermal Limit with Hysteresis
n The LT3015 regulators are available in fixed output volt-
Reverse Output Protection
n ages of 2.5V, 3V, 3.3V, 5V, 12V and 15V and as an
5-Lead TO-220 and DD-Pak, Thermally Enhanced
adjustable device with a 1.22V reference voltage. Pack-
12-Lead MSOP and 8-Lead 3mm 3mm 0.75mm
ages include the 5-lead TO-220 and DD-Pak, a thermally
DFN Packages
enhanced 12-lead MSOP and the low profile (0.75 mm)
APPLICATIONS 8-lead 3mm 3mm DFN.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
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Post-Regulator for Switching Supplies ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
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Negative Logic Supplies
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Low Noise Instrumentation
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Industrial Supplies
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Negative Complement to the LT1963A
Dropout Voltage
TYPICAL APPLICATION
450
T = 25C
J
5V, 1.5A, Low Noise Regulator 400
350
GND 300
DD-PAK/TO-220
250
LT3015-5
10F
10F 200
SHDN SENSE
DFN/MSOP
150
V V
IN OUT
100
5.5V TO IN OUT 5V
30V 1.5A
50
3015 TA01
0
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6
LOAD CURRENT (A)
3015 TA01a
3015fb
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DROPOUT VOLTAGE (mV)LT3015 Series
ABSOLUTE MAXIMUM RATINGS
(Note 1)
SHDN Pin Voltage
IN Pin Voltage .........................................................33V
(with Respect to GND Pin) ..............................33V, 22V
OUT Pin Voltage (Note 10) ......................................33V
Output Short-Circuit Duration .......................... Indefinite
OUT to IN Differential Voltage (Note 10) ........0.3V, 33V
Operating Junction Temperature Range (Note 9)
SENSE Pin Voltage
E-, I-Grade ........................................ 40C to 125C
(with Respect to IN Pin) (Note 10) .................0.3V, 33V
MP-Grade ......................................... 55C to 125C
ADJ Pin Voltage
Storage Temperature Range .................. 65C to 150C
(with Respect to IN Pin) (Note 10) .................0.3V, 33V
Lead Temperature (Soldering, 10Sec)
SHDN Pin Voltage
MS12E Package ................................................300C
(with Respect to IN Pin) (Note 10) .................0.3V, 55V
Q, T Packages ................................................... 250C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
1
IN 12 OUT
IN 1 8 OUT
2 11 OUT
IN
IN OUT
2 7 13
9 IN 3 10 OUT
IN IN
IN 4 9 OUT
SHDN 3 6 SENSE/ADJ*
SHDN 5 8 SENSE/ADJ*
GND 4 5 GND
GND 6 7 GND
MSE PACKAGE
DD PACKAGE
12-LEAD PLASTIC MSOP
8-LEAD (3mm 3mm) PLASTIC DFN
T = 125C, q = 37C/W, q = 10C/W
JMAX JA JC
T = 125C, q = 40C/W, q = 7.5C/W
JMAX JA JC
EXPOSED PAD (PIN 13) IS IN, MUST BE SOLDERED TO PCB
EXPOSED PAD (PIN 9) IS IN, MUST BE SOLDERED TO PCB
*PIN 8 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15
*PIN 6 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15
*PIN 8 = ADJ FOR LT3015
*PIN 6 = ADJ FOR LT3015
FRONT VIEW FRONT VIEW
5 OUT
5 OUT
4 SENSE/ADJ* 4 SENSE/ADJ*
TAB IS IN 3 IN TAB IS IN 3 IN
2 GND 2 GND
1 SHDN 1 SHDN
Q PACKAGE T PACKAGE
5-LEAD PLASTIC DD-PAK 5-LEAD PLASTIC TO-220
T = 125C, q = 14C/W, q = 3C/W T = 125C, q = 50C/W, q = 3C/W
JMAX JA JC JMAX JA JC
*PIN 4 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 4 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15
*PIN 4 = ADJ FOR LT3015 *PIN 4 = ADJ FOR LT3015
3015fb
2