Linear ADI Power SCP-LT3461-EVALZ Quick setup guide

DEMO MANUAL SCP-LT3461-EVALZ
Rev. 0
1
DESCRIPTION
Demonstration circuit SCP-LT3461-EVALZ features the
LT 3 4 6 1 i n a 1 2 V o u t p u t b o o s t c o n v e r t e r w h i c h o p e r a t e s
from an input voltage of 3V to 6V. The maximum output
current is 70mA when powered from a 5.0V input and
40mA when powered from a 3.3V input.
Like all boards in the Signal Chain Power series, this board
is designed to be easily plugged into other SCP boards to
form a complete signal chain power system, enabling fast
evaluation of low power signal chains. To evaluate this
board, some universal SCP hardware is required, namely:
SCP-INPUT-EVALZ SCP-1X2BKOUT-EVALZ
SCP-OUTPUT-EVALZ SCP-1X5BKOUT-EVALZ
SCP-FILTER-EVALZ SCP-5X1-EVALZ
SCP-THRUBRD-EVALZ
To properly evaluate SCP series demo boards, you will
need the SCP Configurator companion software. SCP
Configurator can help you choose the right board and to-
pology for your design.
Note that this Demo Manual does not cover details im-
portant to the operation and configuration regarding the
LT3461. Please refer to the LT3461 datasheet for a com-
plete description of the part.
Design files for this circuit board are available.
All registered trademarks and trademarks are property of their respective owner.
Table 1. Performance Summary
SYMBOL
PARAMETER
NOTES
MIN
TYP
MAX
UNITS
V
IN(MAX)
Max Input Voltage
16
V
V
OUT(MAX)
Max Output Voltage
38
V
I
SW(LIM)
Switch Current Limit
300
420
600
mA
BOARD IMAGE
Figure 1. SCP-LT 3 4 6 1 -EVALZ Board
DEMO MANUAL
SCP-LT3461-EVALZ
Signal Chain Power
LT3461 Boost Converter

DEMO MANUAL SCP-LT3461-EVALZ
Rev. 0
2
QUICK START PROCEDURE
Demonstration circuit SCP-LT3461-EVALZ is easy to set
up to evaluate the performance of any SCP hardware
configuration.
1. The SCP-LT3461-EVALZ ships with a default output
voltage of 12V. To change the output voltage, see “Con-
figuration Settings” section, and modify the board ac-
cordingly. Be sure to check for open connections or sol-
der shorts after making any modifications.
2. Connect the SCP-INPUT-EVALZ and SCP-OUTPUT-
EVALZ boards to the SCP-LT3461-EVALZ (refer to Fig-
ure 2) and connect the input board to a voltage source,
V
SOURCE
. Connect the output board to a voltmeter or
dynamic load. Slowly raise the input voltage until the
SCP-LT3461-EVALZ powers up into regulation and
sweep V
SOURCE
through the desired range of operation.
NOTE: Make sure that the input voltage is always within
specification. If using a dynamic load to measure out-
put voltage, make sure the load is initially set to zero.
3. Check for proper output voltage. The output should be
regulated at the programmed value (±5%).
4. Once the proper output voltage is established, power
off V
SOURCE
and similarly test other boards in the SCP
system until all elements have been individually verified
prior to assembling into the final circuit configuration.
NOTE: When measuring the input or output voltage rip-
ple, use the optional SMA connector locations available
on the input, output, 1 ´ 5, 1 ´ 2, and 5 ´ 1 breakout
boards. Avoid using the test point connections with
long scope leads.
Figure 2. Proper Measurement Equipment Setup (Use SMA connectors for Measuring Input or Output Ripple)

DEMO MANUAL SCP-LT3461-EVALZ
Rev. 0
3
CONFIGURATION SETTINGS
Demonstration circuit SCP-LT3461-EVALZ features the
LT 3 4 6 1 i n a 1 2 V o u t p u t b o o s t c o n v e r t e r w h i c h o p e r a t e s
from an input voltage of 3V to 6V. The maximum output
current is 70mA when powered from a 5.0V input and
40mA when powered from a 3.3V input.
The output of the SCP-LT3461-EVALZ is resistor-program-
mable from 5V to 38V. T h e b o a r d c a n b e also configured
to drive VIOC-capable linear regulators.
OUTPUT VOLTA G E PROGRAMMING
!
Table 2. Resistor Selection Guide for Common Output Voltages
V
OUT
(V)
R1 (Ω)
R2 (Ω)
5.0
45.3k
15.0k
6.0
61.9k
16.5k
7.0
84.5k
18.7k
8.0
102k
19.1k
9.0
140k
22.6k
10.0
191k
27.4k
11.0
221k
28.7k
12.0
261k
30.1k
13.0
274k
29.4k
14.0
287k
28.0k
15.0
301k
27.4k
16.0
316k
26.7k
17.0
332k
26.7k
18.0
348k
26.1k
19.0
365k
26.1k
20.0
383k
25.5k
21.0
402k
25.5k
22.0
422k
25.5k
23.0
442k
25.5k
24.0
464k
25.5k
25.0
487k
25.5k
30.0
536k
23.2k
35.0
634k
23.7k
38.0
681k
23.2k
SHDN PIN CONFIGURATION
The SHDN pin is tied to the optional SCP Run/Sequence
header P1. To create a harness for this function, use Molex
part 0510650300 with crimp pin 50212-8000.
To use an active run signal, use a 1.00M resistor for either
pull-up or pull-down resistors R4 and R5, short R6 with
0 W , and use the drive signal from connector P1.
VOLTAGE INPUT-TO-OUTPUT CONTROL (VIOC)
IMPLEMENTATION
To implement the VIOC function for this regulator, set R7
to 0 W . Refer to the “Configuration Settings” section in the
Demo Manual for the low-dropout (LDO) linear regulator
board and use the following configuration for this board.
Table 3. VIOC Cross-Reference Designators
VIOC SETTING REFERENCES
R
BOT
R
TOP
R
MAX
V
OUT
Reference Designators
R2
R1
R3
!
!
I
SINK
is the current through R
MAX
which is typically 15µA.
Since the divider current is fixed due to the internal low
side gain setting feedback resistor and is less than the rec-
ommended divider current of 100µA, the effect of the sink
current on the maximum linear regulator input voltage
cannot not be mitigated and should be taken into consid-
eration.
VOUT =1 .2 5 5 V 1 +R1
R2
⎛
⎝
⎜⎞
⎠
⎟
VL DOIN −VL DOOUT =VVIOC =1 .2 5 5 V RBOT +RTOP
RBOT
⎛
⎝
⎜⎞
⎠
⎟
VMAX
( )
LDOIN =1 .2 5 5 V RBOT +RTOP +RMAX
RBOT
⎛
⎝
⎜⎞
⎠
⎟+ISINKRMAX

DEMO MANUAL SCP-LT3461-EVALZ
Rev. 0
4
PARTS LIST
ITEM
QTY
REFERENCE
PART DESCRIPTION
MANUFACTURER/PART NUMBER
1
1
PCB
PRINTED CIRCUIT BOARD
ANALOG DEVICES 08_059992a
2
1
C1
CAP CER 0.1uF 25V 10% X7R 0603
SAMSUNG CL10B104KA8NNNC
3
1
C2
CAP CER 4.7uF 25V 10% X5R 0805
SAMSUNG CL21A475KAQNNNG
4
1
C3
CAP CER 1uF 50V 10% X7R 1206
YAGEO CC1206KKX7R9BB105
5
1
C4
CAP CER 0.47uF 50V 10% X7R 0805
SAMSUNG CL21B474KBFNNNG
6
1
C5
CAP CER 22pF 50V 5% C0G 0402 AEC-Q200 LOW ESR
TDK CGA2B2C0G1H220J050BA
7
1
C6
CAP CER 0.047uF 16V 10% X7R 0603
AVX CORPORATION 0603YC473KAT2A
8
1
C7
CAP MLCC 0402 (Note 1)
N/A
9
1
INPUT
CONN-PCB MALE HEADER 3POS 2.54MM PITCH R/A GOLD
SULLINS PBC03SBAN
10
1
L1
IND POWER COIL, 0.3A, 0.58OHM DCR
MURATA LQH32CN150K53L
11
1
OUTPUT
CONN FEMALE 3POS 2.54MM PITCH R/A GOLD
SULLINS PPPC031LGBN-RC
12
1
P1
CONN-PCB 3POS HEADER WIRE TO BRD WAFER ASSY STRAIGHT
2MM PITCH (Note 1)
MOLEX 53253-0370
13
1
R1
RES SMD 261K Ohm 1% 1/8W 0805
YAGEO RC0805FR-07261KL
14
1
R2
RES SMD 30.1K Ohm 1% 1/8W 0805 AEC-Q200
PANASONIC ERJ-6ENF3012V
15
2
R3, R4
RES SMD 0 Ohm JUMPER 1/8W 0805 AEC-Q200
VISHAY CRCW08050000Z0EA
16
3
R5, R6, R7
RES SMD 0 Ohm JUMPER 1/8W 0805 AEC-Q200 (Note 1)
VISHAY CRCW08050000Z0EA
17
1
U1
IC-ADI 1.3MEGHZ STEP-UP DC/DC CONVERTERS WITH
INTEGRATED SCHOTTKY
ANALOG DEVICES LT3461ES6#PBF
18
1
VIOC
CONN FEMALE 2POS 2.54MM PITCH R/A GOLD
SULLINS PPPC021LGBN-RC
Note 1. These items are not stuffed (DNI).

DEMO MANUAL SCP-LT3461-EVALZ
Rev. 0
5
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Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog
Devices for its use, nor for any infringements of patents or other rights of third parties that may result from its use. Specifications
subject to change without notice. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
SCHEMATIC DIAGRAM
MALE
NC GND
GND
NC
GND
LT3461 BOOST
FEMALE
MALE
FEMALE
2 2
<DESIGN_VIEW>
: NA
Product(s): LT3461
HW TYPE : Customer Evaluation
1:1
A
02_059992
J VIERNES
0.047UF
53253-0370
0
22 PF
DNI
LT3461ES6#PBF
DNI
25V
0.1UF
26 1K
15UH
25V
DNI
16V
0
0
0 0
DNI
4.7UF
PBC03SBAN
50V
DNI
0.47UF
1.0UF
50V
PPPC031LGBN-RC
30.9K
PPPC021LGBN-RC
C5
R2
C3
R1
R5
C7
R4
C2 C6
U1
C1
R3
P1
L1
OU TPUT
R6
C4
R7
INP UT
VIOC
RUN
SHDN_N
VIOC
VO+
VIN
SHDN_N
VIOC
VO+
VIN
4
2
2 1
5
1
1 3
3
2
2
6
1
3
3
1 2
VIN
VOU T
SHDN_N
FB
GND
SW
AGN D
AGN D
AGND
D
THIS DRAWING IS THE PROPERTY OF ANALOG DEVICES INC. IN PART, OR USED IN FURNISHI NG INFO RMATION TO OTHERS, OR FOR ANY O THER PURPOSE DETRIMENTAL TO THE INTERESTS
THE EQUIPMENT SHOWN HEREON MAY BE PROTECTED BY PATENTS
A
C
IT IS NOT TO BE REPRODUCED OR COPIED, IN WHOLE OR
DRAWING NO.
2
SCALE
D D
D
SIZE
D
REV
SHEET
1
1
A
2
3
4
3
5
8
D
7
67
8
A B CC
D
5
4
APPROVED
B
6
DESCRIPTION
REVISIONS
OF
OL G E
OWNED OR CONTROLLED BY OWNED ANALOG DEVICES.
E
AN
V
OF ANALOG DEVICES.
SCHEMATIC
S
PTD ENGI NEER DESIG N VIEW
REV DATE

DEMO MANUAL SCP-LT3461-EVALZ
Rev. 0
6
11/2 0
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© ANALOG DEVICES INC. 2020
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circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality.
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