lt3015edd Linear Technology Corporation, lt3015edd Datasheet

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lt3015edd

Manufacturer Part Number
lt3015edd
Description
1.5a, Low Noise, Negative Linear Regulator With Precision Current Limit
Manufacturer
Linear Technology Corporation
Datasheet

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FEATURES
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APPLICATIONS
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TYPICAL APPLICATION
Output Current: 1.5A
Dropout Voltage: 310mV
Precision Current Limit with Foldback
Low Output Noise: 60μV
Low Quiescent Current: 1.1mA
Precision Positive or Negative Shutdown Logic
Fast Transient Response
Wide Input Voltage Range: –1.8V to –30V
Adjustable Output Voltage Range: –1.22V to –29.5V
Controlled Quiescent Current in Dropout
< 1μA Quiescent Current in Shutdown
Stable with 10μF Output Capacitor
Stable with Ceramic, Tantalum or Aluminum Capacitors
Thermal Limit with Hysteresis
Reverse Output Protection
5-Lead TO-220 and DD-Pak, Thermally Enhanced
12-Lead MSOP and 8-Lead 3mm × 3mm × 0.75mm
DFN Packages
Post-Regulator for Switching Supplies
Negative Logic Supplies
Low Noise Instrumentation
Industrial Supplies
Negative Complement to the LT1963A
–5.5V TO
–30V
V
IN
–5V, –1.5A, Low-Noise Regulator
10μF
SHDN
IN
LT3015
GND
RMS
3015 TA01
OUT
ADJ
(10Hz to 100kHz)
3.40k
1%
10.5k
1%
10μF
V
–5V
–1.5A
OUT
with Precision Current Limit
DESCRIPTION
The LT
regulator with fast transient response. The device supplies
up to 1.5A of output current at a typical dropout voltage
of 310mV. Operating quiescent current is typically 1.1mA
and drops to < 1μA in shutdown. Quiescent current is also
well controlled in dropout. In addition to fast transient
response, the LT3015 exhibits very low output noise,
making it ideal for noise sensitive applications.
The LT3015 regulator is stable with a minimum 10μF output
capacitor. Moreover, the regulator can use small ceramic
capacitors without the necessary addition of ESR as is
common with other regulators. Internal protection circuitry
includes reverse output protection, precision current limit
with foldback and thermal limit with hysteresis.
The LT3015 is available as an adjustable device with a
–1.22V reference voltage. Packages include the 5-lead
TO-220 and DD-Pak, a thermally enhanced 12-lead MSOP
and the low profile (0.75 mm) 8-lead 3mm × 3mm DFN.
L, LT, LTC, LTM, ThinSOT, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Negative Linear Regulator
®
3015 is a low noise, low dropout, negative linear
450
400
350
300
250
200
150
100
50
0
0
T
J
= 25°C
–0.2 –0.4
DD-PAK/TO-220
Dropout Voltage
1.5A, Low Noise,
LOAD CURRENT (A)
–0.6
–0.8 –1.0 –1.2 –1.4 –1.6
DFN/MSOP
3015 TA01a
LT3015
1
3015f

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lt3015edd Summary of contents

Page 1

... TO-220 and DD-Pak, a thermally enhanced 12-lead MSOP and the low profile (0.75 mm) 8-lead 3mm × 3mm DFN. L, LT, LTC, LTM, ThinSOT, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 3.40k 1% 10μ ...

Page 2

LT3015 ABSOLUTE MAXIMUM RATINGS (Note 1) IN Pin Voltage .........................................................±33V OUT Pin Voltage (Note 10) ......................................±33V OUT to IN Differential Voltage (Note 10) ........–0.3V, 33V ADJ Pin Voltage (with Respect to IN Pin) (Note 10) .............–0.3V, 33V SHDN Pin Voltage ...

Page 3

... LT3015EMSE#TRPBF LT3015IMSE#PBF LT3015IMSE#TRPBF LT3015MPMSE#PBF LT3015MPMSE#TRPBF LT3015EQ#PBF LT3015EQ#TRPBF LT3015IQ#PBF LT3015IQ#TRPBF LT3015MPQ#PBF LT3015MPQ#TRPBF LT3015ET#PBF LT3015ET#TRPBF LT3015IT#PBF LT3015IT#TRPBF LEAD BASED FINISH TAPE AND REEL LT3015EDD LT3015EDD#TR LT3015IDD LT3015IDD#TR LT3015EMSE LT3015EMSE#TR LT3015IMSE LT3015IMSE#TR LT3015MPMSE LT3015MPMSE#TR LT3015EQ LT3015EQ#TR LT3015IQ LT3015IQ#TR LT3015MPQ LT3015MPQ#TR LT3015ET LT3015ET#TR LT3015IT LT3015IT#TR Consult LTC Marketing for parts specified with wider operating temperature ranges ...

Page 4

LT3015 ELECTRICAL CHARACTERISTICS temperature range, otherwise specifications are at T PARAMETER CONDITIONS Dropout Voltage I = –1mA LOAD –1mA IN OUT(NOMINAL) LOAD (Notes –100mA LOAD I = –100mA LOAD I = ...

Page 5

TYPICAL PERFORMANCE CHARACTERISTICS Typical Dropout Voltage (DFN/MSOP) 450 400 350 300 250 200 150 125°C 100 25°C –40°C 50 –55° –0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6 OUTPUT CURRENT (A) 3015 G01 Typical Dropout Voltage (DD-PAK/TO-220) 600 ...

Page 6

LT3015 TYPICAL PERFORMANCE CHARACTERISTICS LT3015 Quiescent Current –1 SHDN IN –1.0 –0.8 –0 25° –1.22V –0.4 OUT R = 121kΩ L –0 SHDN 0 0 –1 –2 –3 –4 ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS ADJ Pin Bias Current 200 150 100 50 0 –50 –100 V = –2.3V IN –150 POSITIVE CURRENT FLOWS INTO THE PIN –200 –75 –50 – 100 125 150 175 TEMPERATURE (°C) 3015 ...

Page 8

LT3015 TYPICAL PERFORMANCE CHARACTERISTICS Minimum Input Voltage –2.2 –2.0 –1 –1. –1mA L –1.6 –1.4 –1.2 –1.0 –0.8 –0.6 –0.4 –0 SHDN IN 0 –75 –50 – 100 ...

Page 9

TYPICAL PERFORMANCE CHARACTERISTICS SHDN Transient Response –1.5A 10nF SHDN 1V/DIV V OUT 2V/DIV R = 3.3Ω L 3015 G25 C = 10μF 250μs/DIV OUT V = –5V OUT C = 10nF FF LT3015 ...

Page 10

LT3015 PIN FUNCTIONS (DFN/MSOP/Q/T) IN (Pins 1, 2, Exposed Pad Pin Exposed Pad Pin Tab / 3, Tab ): Input. These pins supply power to the regulator. The Tab of the ...

Page 11

BLOCK DIAGRAM _ 1.21V + SHDN – + –1.20V GND APPLICATIONS INFORMATION The LT3015 regulator is a 1.5A negative low dropout linear regulator featuring precision current limit and precision bi-directional shutdown. The device supplies up to 1.5A of output load ...

Page 12

LT3015 APPLICATIONS INFORMATION Table 1 shows 1% resistor divider values for some com- mon output voltages with a resistor divider current of approximately 100μA. Table 1. Output Voltage Resistor Divider Values V R1 OUT (V) (kΩ) –2.5 12.1 –3.0 12.1 ...

Page 13

APPLICATIONS INFORMATION can exhibit an effective value as low as 1μF to 2μF for the DC bias voltage applied and over the operating temperature range. The X5R and X7R dielectrics result in more stable characteristics and are more suitable for ...

Page 14

LT3015 APPLICATIONS INFORMATION The problem occurs with a heavy output load when input voltage is high and output voltage is low. Such situations occur easily after the removal of a short-circuit or if the shutdown pin is pulled high after ...

Page 15

APPLICATIONS INFORMATION Table 2. Measured Thermal Resistance for DFN Package COPPER AREA BOARD TOP SIDE* BACKSIDE AREA 2500mm 2500mm 2500mm 1000mm 2500mm 2500mm 225mm 2500mm 2500mm 100mm 2500mm ...

Page 16

LT3015 TYPICAL APPLICATIONS C1 10μF V < –2.3V IN NOTE: ADJUST R3 FOR 0 TO –1.5A CONSTANT CURRENT PACKAGE DESCRIPTION 3.5 ±0.05 1.65 ±0.05 2.10 ±0.05 (2 SIDES) 0.25 ± 0.05 0.50 BSC 2.38 ±0.05 RECOMMENDED SOLDER PAD PITCH AND ...

Page 17

PACKAGE DESCRIPTION 2.845 0.102 (.112 .004) 5.23 (.206) MIN 0.42 0.038 (.0165 .0015) TYP RECOMMENDED SOLDER PAD LAYOUT DETAIL “A” 0.254 (.010) GAUGE PLANE 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT ...

Page 18

LT3015 PACKAGE DESCRIPTION .060 .256 (1.524) (6.502) .060 .183 (1.524) (4.648) .075 (1.905) .300 (7.620) BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK .067 RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN INCH/(MILLIMETER) 2. DRAWING ...

Page 19

... Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. T Package 5-Lead Plastic TO-220 (Standard) (Reference LTC DWG # 05-08-1421) .147 – ...

Page 20

... V = 2.5V to 20V, “A” Version Stable with RMS 1.8V to 20V 1.2V to 19.5V, RMS IN OUT = V REF , V : 1.2V to 36V, RMS IN set; Directly Parallelable OUT , V : 1.2V to 36V, V RMS IN set; Directly Parallelable (no op OUT LT 0611 • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 2011 OUT(MIN) : OUT 3015f ...

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