DC1144 Quick Start Guide Datasheet by Analog Devices Inc.

l ’ LINE I \p DEMO MANUAL DC1144A TECHNOLOGY L7HEWEAR 1
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DEMO MANUAL DC1144A
DESCRIPTION
LT3580EDD Boost/
Inverting Regulator
Demonstration circuits 1144A-A and 1144A-B feature the
LT
®
3580EDD in Boost/Inverting Regulator configurations.
The demo circuits demonstrate small size and low com-
ponent count. The boost is designed to convert a 3V to
10V source to 12V at 300mA while the inverter converts
a 5V to 12V source to –12V at 350mA. Both converters
use only one feedback resistor to set the output voltage.
The LT3580 operates with inputs as high as 32V but in
these demo boards the input is limited by the voltage
rating of the input capacitors and the magnitude of the
boost output. In a boost converter the input needs to be
less than the output.
Care must be taken when operating the LT3580 at high
input voltages as the junction temperature increases due
to higher internal dissipation. Higher switching frequencies
also increase the internal dissipation.
The LT3580 gets powered from the main input in both,
DC1144A-A and DC1144A-B, but there is an option for a L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
PERFORMANCE SUMMARY
linear regulator built into the board that will allow the IC
to be powered from a lower voltage. If this option is used,
just cut the trace as shown in Figure 6 and install the op-
tional emitter follower regulator on the back of the board.
The DC1144A-B can easily be configured into a SEPIC
converter, just switch the positions of L2 and D2 as shown
in Figure 6.
The LT3580 includes many other features such as Synchro-
nization to external clock, User Configurable Undervoltage
Lockout, Soft-start, Frequency Foldback, and it is easily
configured as boost or inverting converter.
These circuits are intended for space-conscious applica-
tions such as Local Bias Supplies, TFT-LCD Bias Supplies,
GPS Receivers, VFD Bias Supplies and DSL Modems.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1144A
Specifications are at TA = 25°C
Performance Summary DC11144A-A
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 3 10 V
VOUT Output Voltage Range VIN = 3V, ILOAD = 300mA 11.64 12 12.36 V
Ripple VIN = 3.6V, ILOAD = 300mA 40 mV
Efficiency VIN = 4.2V, ILOAD = 350mA 88 %
Switching Frequency 1 MHz
Performance Summary DC11144A-B
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 5 12 V
VOUT Output Voltage Range VIN = 5V, ILOAD = 350mA –11.64 –12 –12.36 V
Ripple VIN = 5V, ILOAD = 350mA 10 mV
Efficiency VIN = 5V, ILOAD = 350mA 80 %
Switching Frequency 2 MHz
W LT3580EDD . 1A 'A ‘ aoosr/mvmmc REGULATOR (“’3 “249°" Demo Circuit “HA-E mm inewxom VIN -A-12VO300mA -B--IZV0350mA -A 3V to 10V vom- -B 5‘! to 12V _ + + _ A—Q .\ A + + * Lzaa v “I V SoYJrce _ GND GND _ . LTC ConfideMid - Ft! Customer Uu Only Figure 1. Proper Measurement Equipment lnr Dc1144A-A
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DEMO MANUAL DC1144A
QUICK START PROCEDURE
Figure1. Proper Measurement Equipment for DC1144A-A
Demonstration circuit 1144A is easy to set up to evaluate the
performance of the LT3580EDD. Refer to Error! Reference
source not found. and Figure 2 for proper measurement
equipment setup and follow the procedure below:
NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN or
VOUT and GND terminals. See Error! Reference source
not found. for proper scope probe technique.
1. Place jumpers in the following positions:
JP1 ON
2. With power off, connect the input power supply to VIN
and GND.
3. Turn on the power at the input.
4. Check for the proper output voltages.
NOTE: If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
5. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
+ _ FA“. + L—Dad V c5' W LT3580EDD o L 'A ‘ aoosr/mvmmc REGULATOR 408 432-1900 . . _ Lung“... Demo Circuit 1144A E -A-12VO300mA vm -a--Izv0350mA -A 3v to 10v -B 5v to 12v VOUT urce . LTC ConfideMid - Ft! Custom" Uu Only L7 LJUW £2
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DEMO MANUAL DC1144A
Figure2. Proper Measurement Equipment for DC1144A-B
QUICK START PROCEDURE
GND
VIN
Figure3. Measurement Input and Output Ripple
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DEMO MANUAL DC1144A
QUICK START PROCEDURE
Figure4. Boost Converter Efficiency at 4.2VIN Figure5. Inverting Regulator Efficiency at 5VIN
OUTPUT CURRENT (mA)
0
EFFICIENCY (%)
90
80
60
40
70
50
30 200100 300
1144A F04
50015050 250 350 450400
OUTPUT CURRENT (mA)
0
EFFICIENCY (%)
80
60
40
70
50
30 16060 240
1144A F05
40012040 200 300 340
Figure6. Optional Modifications to Convert DC1144A-B to ZEPIC Converter and/or Use Separate Regulator to Bias IC
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DEMO MANUAL DC1144A
QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components for Boost Converter
1 C2 CAP., X5R, 4.7μF, 16V, 20% 1206 TAIYOYUDEN, EMK316BJ475ML
1 C4 CAP., X5R, 10μF, 25V, 20% 1206 TAIYOYUDEN, TMK316ABJ106ML-T
1 C7 CAP., X7R, 1000pF, 16V, 10% 0402 MURATA, GRM155R71C102KA01D
1 D1 DIODE, SCHOTTKY RECTIFIER 2A, POWER D123 DIODES INC., DFLS220L-7
1 L1 INDUCTOR, 6.8μH SUMIDA, CDRH5D16NP-6R8NC
1 R2 RES., CHIP, 130k, 1/6W, 1% 0402 VISHAY, CRCW0402133KFKED
1 R5 RES., CHIP, 20k, 1/16W, 1% 0402 VISHAY, CRCW040220K0FKED
1 R6 RES., CHIP, 84.5k, 1/6W, 1% 0402 VISHAY, CRCW040284K5FKED
1FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1144A-A
1 C6 CAP., X7R, 0.1μF, 16V, 10% 0402 AVX, 0402YC104KAT2A
1 U1 LT3580EDD, 8-LEAD PLASTIC DFN (3X3) LINEAR TECH., LT3580EDD#PBF
Additional Demo Board Circuit Components
0 C3 (OPT) CAP., 0402
1 C5 CAP., X7R, 0.1μF, 16V, 10% 0603 AVX, 0603YC104KAT2A
0 C8 (OPT) CAP., 0402
0 D3 (OPT)
6 TP1-TP6 TESTPOINT, TURRET MILL MAX 2501-2-00-80-00-00-07-0
1 JP1 0.079 SINGLE ROW HEADER, 3 PIN SAMTEC, TMM103-02-L-S
1 XJP SHUNT SAMTEC, 2SN-BK-G
0 Q2 (OPT)
2 R4, R8 RES., CHIP, 100k, 1/10W, 1% 0805 VISHAY, CRCW0805100KFKEA
0 R9 (OPT)
Required Circuit Components for Inverting Regulator
1 C1 CAP., X5R,1μF, 25V,10%, 0805 AVX, 08053D105KAT
1 C2 CAP., X5R, 4.7μF, 16V, 20% 1206 TAIYOYUDEN, EMK316BJ475ML
1C4 CAP., X5R, 10μF, 25V, 20% 1206 TAIYOYUDEN, TMK316ABJ106ML-T
1 C6 CAP., X5R, 0.1μF, 16V, 10% 0402 AVX, 0402YC104KAT2A
1 C7 CAP., X7R, 2200pF, 16V, 10% 0402 MURATA, GRM155R71C222KA01D
1 C8 CAP., NPO, 100pF, 25, 10%, 0402 AVX, 04023A101KAT2A
1 D2 DIODE, SCHOTTKY RECTIFIER 2A, POWER D123 DIODES INC., DFLS130L-7
1 L1 INDUCTOR, 8.2μH COOPER BUSSMANN, SD25-8R2-R
1 L2 INDUCTOR, 15μH COOPER BUSSMANN, SD14-150-R
1 R2 RES., CHIP, 143k, 1/6W, 1% 0402 VISHAY, CRCW0402143KFKED
1 R5 RES., CHIP, 20k, 1/16W, 1% 0402 VISHAY, CRCW040220K0FKED
1 R6 RES., CHIP, 42.2k, 1/6W, 1% 0402 VISHAY, CRCW040242K2FKED
1FAB, PRINTED CIRCUIT BOARD DEMO CIRCUIT 1144A-B
1 U1 LT3580EDD, 8-LEAD PLASTIC DFN (3X3) LINEAR TECH., LT3580EDD#PBF
PARTS LIST
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DEMO MANUAL DC1144A
QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
0 C3 (OPT) CAP., 0402
1 C5 CAP., X7R, 0.1μF, 16V, 10% 0603 AVX, 0603YC104KAT2A
0 D3 (OPT)
6 TP1-TP6 TESTPOINT, TURRET MILL MAX 2501-2-00-80-00-00-07-0
1 JP1 0.079 SINGLE ROW HEADER, 3 PIN SAMTEC, TMM103-02-L-S
1 XJP SHUNT SAMTEC, 2SN-BK-G
0 Q2 (OPT)
2 R4, R8 RES., CHIP, 100k, 1/10W, 1% 0805 VISHAY, CRCW0805100KFKEA
0 R9 (OPT)
PARTS LIST
AN UAL DC 1 144A q \ x 3 L7 LJUW
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DEMO MANUAL DC1144A
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.
SCHEMATIC DIAGRAM
B
B
A
A
2 2
1 1
*
1206
1206
0603
*
DC1144A-A
DC1144A-B
VOUT
12V@300mA
-12V@350mA
VERSION TABLE
*
D1 D2 C1 L2 R2
DFLS220L
NOT USED
NOT USED
DFLS130L
NOT USED
1uF, 25V
NOT USED
SD14-150
130K
143K
ASSEMBLY TYPE VIN
3V to 10V
5V to 12V
C7
1nF
2.2nF
L1
SD25-8R2
R6
84.5K
42.2K
CDRH5D16-6R8
C8
NOT USED
100pF
sync
shdn
VOUTVIN
JP1
ON
OFF
Output
JP1
ON
OFF
Output
1
3
2
C7
*
C7
*
D2
*
D2
*
12
C4
10uF
25V
C4
10uF
25V
D3
OPT
D3
OPT
TP3
SHDN TP3
SHDN
R2
*
R2
*
L2
*
L2
*
TP4
SYNC
TP4
SYNC
TP1
VIN
*
TP1
VIN
*
R4
100K
R4
100K
C3
OPT
C3
OPT
C1C1
R8
100K
R8
100K
C5
0.1uF
16V
C5
0.1uF
16V
C6
0.1uF
C6
0.1uF
L1
*
L1
*
TP2 VOUT
TP2 VOUT
C2
4.7uF
16V
C2
4.7uF
16V
R5
20K
R5
20K C8
*
C8
*
TP6
GND TP6
GND TP5
GND
TP5
GND
D1
*
D1
*
1 2
R6
*
R6
*
Q2
OPT
Q2
OPT
1
32
R9
OPT
R9
OPT
U1
LT3580EDD
U1
LT3580EDD
SHDN
5
VIN 3
SW 4
VC 2
FB 1
RT
6
SYNC
8
SS
7
GND
9
L7 LINE/“2
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DEMO MANUAL DC1144A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com
LINEAR TECHNOLOGY CORPORATION 2015
LT 0115 • PRINTED IN USA
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This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
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