LT3080EDD LINER [Linear Technology], LT3080EDD Datasheet

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LT3080EDD

Manufacturer Part Number
LT3080EDD
Description
Adjustable1.1A Single Resistor Low Dropout Regulator
Manufacturer
LINER [Linear Technology]
Datasheet

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APPLICATIONS
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TYPICAL APPLICATION
FEATURES
Outputs May be Paralleled for Higher Current and
Heat Spreading
Output Current: 1.1A
Single Resistor Programs Output Voltage
1% Initial Accuracy of SET Pin Current
Output Adjustable to 0V
Low Output Noise: 40μV
Wide Input Voltage Range: 1.2V to 36V
Low Dropout Voltage: 350mV (Except SOT-223
Package)
<1mV Load Regulation
<0.001%/V Line Regulation
Minimum Load Current: 0.5mA
Stable with 2.2μF Minimum Ceramic Output Capacitor
Current Limit with Foldback and Overtemperature
Protected
Available in 8-Lead MSOP , 3mm × 3mm DFN,
5-Lead DD-Pak, TO-220 and 3-Lead SOT-223
High Current All Surface Mount Supply
High Effi ciency Linear Regulator
Post Regulator for Switching Supplies
Low Parts Count Variable Voltage Supply
Low Output Voltage Power Supplies
1.2V TO 36V
V
IN
Variable Output Voltage 1.1A Supply
V
CONTROL
1μF
IN
SET
RMS
R
V
SET
OUT
LT3080
+
(10Hz to 100kHz)
= R
SET
• 10μA
3080 TA01a
OUT
V
2.2μF
OUT
DESCRIPTION
The LT
be paralleled to increase output current or spread heat in
surface mounted boards. Architected as a precision cur-
rent source and voltage follower allows this new regulator
to be used in many applications requiring high current,
adjustability to zero, and no heat sink. Also the device
brings out the collector of the pass transistor to allow low
dropout operation —down to 350 millivolts— when used
with multiple supplies.
A key feature of the LT3080 is the capability to supply a
wide output voltage range. By using a reference current
through a single resistor, the output voltage is programmed
to any level between zero and 36V. The LT3080 is stable
with 2.2μF of capacitance on the output, and the IC uses
small ceramic capacitors that do not require additional
ESR as is common with other regulators.
Internal protection circuitry includes current limiting and
thermal limiting. The LT3080 regulator is offered in the
8-lead MSOP (with an exposed pad for better thermal
characteristics), a 3mm × 3mm DFN, 5-lead DD-Pak,
TO-220 and a simple-to-use 3-lead SOT-223 version.
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and VLDO
and ThinSOT are trademarks of Linear Technology Corporation. All other trademarks are the
property of their respective owners.
®
3080 is a 1.1A low dropout linear regulator that can
Adjustable1.1A Single
9.80
Resistor Low Dropout
N = 13792
SET PIN CURRENT DISTRIBUTION (μA)
Set Pin Current Distribution
9.90
10.00
10.10
Regulator
3080 G02
10.20
LT3080
3080fb
1

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LT3080EDD Summary of contents

Page 1

FEATURES n Outputs May be Paralleled for Higher Current and Heat Spreading n Output Current: 1.1A n Single Resistor Programs Output Voltage n 1% Initial Accuracy of SET Pin Current n Output Adjustable Low Output Noise: 40μV ...

Page 2

... LT3080EMS8E#TRPBF LT3080EQ#PBF LT3080EQ#TRPBF LT3080ET#PBF LT3080ET#TRPBF LT3080EST#PBF LT3080EST#TRPBF LEAD BASED FINISH TAPE AND REEL LT3080EDD LT3080EDD#TR LT3080EMS8E LT3080EMS8E#TR LT3080EQ LT3080EQ#TR LT3080ET LT3080ET#TR LT3080EST LT3080EST#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: For more information on tape and reel specifi ...

Page 3

ELECTRICAL CHARACTERISTICS temperature range, otherwise specifi cations are at T PARAMETER SET Pin Current I SET Output Offset Voltage (V – OUT SET 1mA IN CONTROL OUT Load Regulation ...

Page 4

LT3080 TYPICAL PERFORMANCE CHARACTERISTICS Set Pin Current 10.20 10.15 10.10 10.05 10.00 9.95 9.90 9.85 9.80 –50 – 100 125 TEMPERATURE (°C) 3080 G01 Offset Voltage Distribution N = 13250 0 –2 – ...

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TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage (Minimum IN Voltage) 400 350 I = 1.1A LOAD 300 250 I = 500mA LOAD 200 150 100 I = 100mA LOAD –50 – 100 125 150 TEMPERATURE (°C) ...

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LT3080 TYPICAL PERFORMANCE CHARACTERISTICS V Pin Current CONTROL 1.1A 20 LOAD DEVICE IN CURRENT LIMIT 1mA LOAD 36* 6 INPUT-TO-OUTPUT DIFFERENTIAL (V) *SEE NOTE 9 IN ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS Output Voltage Noise V OUT 100μV/DIV TIME 1ms/DIV OUT R = 100k SET C = O.1μF SET C = 10μF OUT I = 1.1A LOAD PIN FUNCTIONS (DD/MS8E/Q/T/ST) V (Pin 5/Pin 5/Pin 4/Pin 4/NA): ...

Page 8

LT3080 BLOCK DIAGRAM APPLICATIONS INFORMATION The LT3080 regulator is easy to use and has all the pro- tection features expected in high performance regulators. Included are short-circuit protection and safe operating area protection, as well as thermal shutdown. The LT3080 ...

Page 9

APPLICATIONS INFORMATION IN LT3080 V CONTROL + + + V V – IN CONTROL SET R SET Figure 1. Basic Adjustable Regulator Output Voltage The LT3080 generates a 10μA reference current that fl ows out of the SET pin. Connecting ...

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LT3080 APPLICATIONS INFORMATION 20 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10μF 0 X5R –20 –40 –60 Y5V –80 –100 BIAS VOLTAGE (V) Figure 2. Ceramic Capacitor DC Bias Characteristics ...

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APPLICATIONS INFORMATION (5 milliohms for the two devices in parallel) only adds about 10 millivolts of output regulation drop at an output of 2A. Even with an output voltage as low as 1V, this only adds 1% to the regulation. ...

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LT3080 APPLICATIONS INFORMATION from the error amplifi er must be considered, and the gain created by using a resistor divider cannot be forgotten. Traditional low noise regulators bring the voltage refer- ence out to an external pin (usually through a ...

Page 13

APPLICATIONS INFORMATION of the connections between the regulator and the load. The data sheet specifi cation for load regulation is Kelvin sensed at the pins of the package. Negative side sensing is a true Kelvin connection, with the bottom of ...

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LT3080 APPLICATIONS INFORMATION The power in the drive circuit equals – V )(I DRIVE CONTROL OUT CONTROL where I is equal to I /60. I CONTROL OUT of output current. A curve of I CONTROL in the ...

Page 15

APPLICATIONS INFORMATION The second technique for reducing power dissipation, shown in Figure 9, uses a resistor in parallel with the LT3080. This resistor provides a parallel path for current fl ow, reducing the current fl owing through the LT3080. This ...

Page 16

LT3080 TYPICAL APPLICATIONS Higher Output Current MJ4502 50Ω LT3080 IN V CONTROL + + 100μF – 1μF SET 332k Current Source IN LT3080 V IN 10V V CONTROL + – 1μF SET 100k V IN 12V 16 ...

Page 17

TYPICAL APPLICATIONS IN LT3080 28V V CONTROL + – C1 1.5μF SET R1 249k 4.8V to 28V 12V TO 18V V CONTROL + 15μF SET Coincident Tracking V IN LT3080 V CONTROL + ...

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LT3080 TYPICAL APPLICATIONS V IN 50V + Ramp Generator LT3080 CONTROL + 1μF – SET VN2222LL 1μF Ground Clamp IN LT3080 CONTROL + – OUT 1μF 1N4148 5k 18 High Voltage Regulator ...

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TYPICAL APPLICATIONS Low Voltage, High Current Adjustable High Effi ciency Regulator † 2. 2× LTC3414 2.2MEG 100k 100μF PGOOD RUN/SS 1000pF SYNC/MODE SGND *DIFFERENTIAL VOLTAGE ON LT3080 IS 0.6V SET BY THE V ...

Page 20

LT3080 TYPICAL APPLICATIONS CMDSH-4E † 4.5V TO 25V V IN 10μF 1μF LT3493 100k SHDN 0.1μF GND *DIFFERENTIAL VOLTAGE ON LT3080 ≈ 1.4V SET BY THE TPO610L P-CHANNEL THRESHOLD. † MAXIMUM OUTPUT VOLTAGE IS 2V BELOW INPUT VOLTAGE 20 Adjustable ...

Page 21

PACKAGE DESCRIPTION 3.5 0.05 1.65 0.05 2.10 0.05 (2 SIDES) 0.25 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED TOP MARK (NOTE 6) DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference ...

Page 22

LT3080 PACKAGE DESCRIPTION 1.88 0.102 (.074 .004) 5.23 (.206) MIN 0.42 0.038 (.0165 .0015) TYP RECOMMENDED SOLDER PAD LAYOUT DETAIL “A” 0.254 (.010) GAUGE PLANE DETAIL “A” 0.18 (.007) NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. ...

Page 23

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 NOT TO ...

Page 24

LT3080 PACKAGE DESCRIPTION .390 – .415 (9.906 – 10.541) .460 – .500 (11.684 – 12.700) .067 BSC .028 – .038 (1.70) (0.711 – 0.965) .264 – .287 (6.70 – 7.30) .130 – .146 (3.30 – 3.71) .0905 (2.30) BSC .071 ...

Page 25

REVISION HISTORY (Revision history begins at Rev B) REV DATE DESCRIPTION B 6/10 Made minor updates to Features and Description sections Revised Line Regulation Conditions and Note 2 Made minor text edits in Applications Information section Added 200k resistor to ...

Page 26

LT3080 TYPICAL APPLICATION V IN 4.8V TO 28V RELATED PARTS PART NUMBER DESCRIPTION LDOs LT1086 1.5A Low Dropout Regulator LT1117 800mA Low Dropout Regulator LT1118 800mA Low Dropout Regulator LT1963A 1.5A Low Noise, Fast Transient Response LDO LT1965 1.1A Low ...

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