LT3080EDD-1#PBF Linear Technology, LT3080EDD-1#PBF Datasheet

IC REG LDO ADJ 1.1A 8-DFN

LT3080EDD-1#PBF

Manufacturer Part Number
LT3080EDD-1#PBF
Description
IC REG LDO ADJ 1.1A 8-DFN
Manufacturer
Linear Technology
Datasheet

Specifications of LT3080EDD-1#PBF

Regulator Topology
Positive Adjustable
Voltage - Output
0 ~ 36 V
Voltage - Input
1.2 ~ 36 V
Voltage - Dropout (typical)
1.35V @ 1.1A
Number Of Regulators
1
Current - Output
1.1A
Current - Limit (min)
1.1A
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
8-DFN
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
LT3080EDD-1#PBFLT3080EDD-1
Manufacturer:
LT
Quantity:
10 000
Company:
Part Number:
LT3080EDD-1#PBFLT3080EDD-1
Manufacturer:
LINEAR/凌特
Quantity:
20 000
Company:
Part Number:
LT3080EDD-1#PBF
Manufacturer:
LT
Quantity:
3 000
Company:
Part Number:
LT3080EDD-1#PBF
Manufacturer:
LINEAR/凌特
Quantity:
20 000
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TYPICAL APPLICATION
FEATURES
APPLICATIONS
4.8V TO 28V
Internal Ballast Resistor Permits Direct
Connection to Power Plane 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
<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 and 3mm × 3mm DFN
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
V
IN
1μF
V
V
CONTROL
CONTROL
IN
IN
SET
SET
165k
Paralleling Regulators
+
+
RMS
LT3080-1
LT3080-1
(10Hz to 100kHz)
25mΩ
25mΩ
OUT*
OUT*
30801 TA01
10μF
V
3.3V
2.2A
OUT
*OUTPUTS CAN BE
DIRECTLY MOUNTED
TO POWER PLANE
DESCRIPTION
The LT
incorporates an internal ballast resistor to allow direct
paralleling of devices without the need for PC board trace
resistors. The internal ballast resistor allows multiple
devices to be paralleled directly on a surface mount
board for higher output current and power dissipation
while keeping board layout simple and easy. The device
brings out the collector of the pass transistor to allow low
dropout operation—down to 350mV—when used with
multiple input supplies.
The LT3080-1 is capable of supplying a wide output volt-
age range. A reference current through a single resistor
programs the output voltage to any level between zero
and 36V. The LT3080-1 is stable with 2.2μF of ceramic
capacitance on the output, not requiring additional ESR
as is common with other regulators.
Internal protection includes current limiting and thermal
limiting. The LT3080-1 regulator is offered in the 8-
lead MSOP (with an Exposed Pad for better thermal
characteristics) and 3mm × 3mm DFN packages.
trademarks are the property of their respective owners.
Adjustable Single Resistor
, LT , LTC and LTM are registered trademarks of Linear Technology Corporation. All other
®
Low Dropout Regulator
3080-1 is a 1.1A low dropout linear regulator that
–2
Offset Voltage Distribution
N = 13250
Parallelable 1.1A
–1
V
OS
DISTRIBUTION (mV)
0
1
30801 TA01b
LT3080-1
2
30801fa
1

Related parts for LT3080EDD-1#PBF

LT3080EDD-1#PBF Summary of contents

Page 1

... The LT3080-1 regulator is offered in the 8- lead MSOP (with an Exposed Pad for better thermal characteristics) and 3mm × 3mm DFN packages LTC and LTM are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. 25mΩ ...

Page 2

... PLASTIC DFN T = 125°C, θ = 64°C/W, θ JMAX JA EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL LT3080EDD-1#PBF LT3080EDD-1#TRPBF LT3080EMS8E-1#PBF LT3080EMS8E-1#TRPBF LEAD BASED FINISH TAPE AND REEL LT3080EDD-1 LT3080EDD-1#TR LT3080EMS8E-1 LT3080EMS8E-1#TR Consult LTC Marketing for parts 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 OS Load Regulation ΔI SET ΔV OS ΔV OS Line Regulation (Note 9) ΔI ...

Page 4

LT3080-1 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 – 100 125 150 TEMPERATURE (°C) 30801 G01 Offset Voltage Distribution N = 13250 – 2 – ...

Page 5

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 TEMPERATURE (°C) 30801 ...

Page 6

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

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) V (Pin 5/Pin 5): This pin ...

Page 8

LT3080-1 BLOCK DIAGRAM APPLICATIONS INFORMATION The LT3080-1 regulator is easy to use and has all the protection features expected in high performance regulators. Included are short-circuit protection and safe operating area protection, as well as thermal shutdown. The LT3080-1 is ...

Page 9

APPLICATIONS INFORMATION IN LT3080-1 V CONTROL + + + V V – IN CONTROL SET R C SET SET Figure 1. Basic Adjustable Regulator dissipation: a higher voltage supply for the control circuitry and a lower voltage supply for the ...

Page 10

LT3080-1 APPLICATIONS INFORMATION Extra consideration must be given to the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics used are specifi ed ...

Page 11

APPLICATIONS INFORMATION better than 90 percent equalized sharing of the current. The internal resistance of 25 milliohms (per device) only adds about 25 millivolts of output regulation drop at an output of 2A. At low output voltage, 1V, this adds ...

Page 12

LT3080-1 APPLICATIONS INFORMATION Quieting the Noise The LT3080-1 offers numerous advantages when it comes to dealing with noise. There are several sources of noise in a linear regulator. The most critical noise source for any LDO is the reference; from ...

Page 13

APPLICATIONS INFORMATION Load Regulation Because the LT3080 fl oating device (there is no ground pin on the part, all quiescent and drive current is delivered to the load not possible to provide true remote load sensing. ...

Page 14

LT3080-1 APPLICATIONS INFORMATION give consideration to all sources of thermal resistance from junction to ambient. This includes junction-to-case, case-to-heat sink interface, heat sink resistance or circuit board-to-ambient as the application dictates. Additional heat sources nearby must also be considered. For ...

Page 15

APPLICATIONS INFORMATION Power dissipation under these conditions is equal to: PDRIVE = (V – V )(I CONTROL OUT CONTROL OUT CONTROL (3.630V – 0.9V)(17mA) = 46mW DRIVE ...

Page 16

LT3080-1 APPLICATIONS INFORMATION The second technique for reducing power dissipation, shown in Figure 9, uses a resistor in parallel with the LT3080-1. This resistor provides a parallel path for current fl ow, reducing the current fl owing through the LT3080-1. ...

Page 17

TYPICAL APPLICATIONS OFF V IN 10V Adding Shutdown LT3080 CONTROL + – 25mΩ SET IN LT3080-1 V CONTROL + – 25mΩ SET Q1 VN2222LL R1 SHUTDOWN 30801 TA02 *Q2 INSURES ZERO OUTPUT IN THE ABSENCE ...

Page 18

LT3080-1 TYPICAL APPLICATIONS V IN 10V C1 2.2μ 4.8V TO 28V 18 Using a Lower Value SET Resistor IN LT3080-1 V CONTROL + – 25mΩ OUT SET LT3080 CONTROL + – 25mΩ OUT SET R1 2mA ...

Page 19

TYPICAL APPLICATIONS IN LT3080 13V TO 18V V CONTROL + – SET LT3080 CONTROL + – SET + 15μF 5V 10μF *4mV DROP ENSURES LT3080-1 IS OFF WITH NO-LOAD MULTIPLE LT3080-1’S CAN BE USED IN PARALLEL ...

Page 20

LT3080-1 TYPICAL APPLICATIONS Low Voltage, High Current Adjustable High Effi ciency Regulator 2. † 5.5V + 2× LTC3414 2.2MEG 100k 100μF PGOOD RUN/SS 1000pF SYNC/MODE SGND PGND * DIFFERENTIAL VOLTAGE ON LT3080-1 IS 0.6V SET ...

Page 21

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

Page 22

LT3080-1 PACKAGE DESCRIPTION 3.5 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) 0.25 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS PIN 1 TOP MARK (NOTE 6) 0.200 REF 22 DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG ...

Page 23

... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 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 representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 24

... LTC3406/LTC3406B 600mA (I ), 1.5MHz Synchronous OUT Step-Down DC/DC Converter LTC3411 1.25A (I ), 4MHz Synchronous OUT Step-Down DC/DC Converter VLDO and ThinSOT are trademarks of Linear Technology Corporation. Linear Technology Corporation 24 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● Paralleling Regulators IN LT3080-1 ...

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