Linear ADI Power SCP-LT3461-EVALZ Quick setup guide

DEMO MANUAL SCP-LT3461-EVALZ

Rev. 0

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

IN(MAX)

Max Input Voltage

OUT(MAX)

Max Output Voltage

SW(LIM)

Switch Current Limit

300

420

600

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

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,

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

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

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

, 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

. 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

BOT

TOP

MAX

OUT

Reference Designators

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

⎛

⎝

⎜⎞

⎠

⎟

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

PARTS LIST

ITEM

QTY

REFERENCE

PART DESCRIPTION

MANUFACTURER/PART NUMBER

PCB

PRINTED CIRCUIT BOARD

ANALOG DEVICES 08_059992a

CAP CER 0.1uF 25V 10% X7R 0603

SAMSUNG CL10B104KA8NNNC

CAP CER 4.7uF 25V 10% X5R 0805

SAMSUNG CL21A475KAQNNNG

CAP CER 1uF 50V 10% X7R 1206

YAGEO CC1206KKX7R9BB105

CAP CER 0.47uF 50V 10% X7R 0805

SAMSUNG CL21B474KBFNNNG

CAP CER 22pF 50V 5% C0G 0402 AEC-Q200 LOW ESR

TDK CGA2B2C0G1H220J050BA

CAP CER 0.047uF 16V 10% X7R 0603

AVX CORPORATION 0603YC473KAT2A

CAP MLCC 0402 (Note 1)

N/A

INPUT

CONN-PCB MALE HEADER 3POS 2.54MM PITCH R/A GOLD

SULLINS PBC03SBAN

IND POWER COIL, 0.3A, 0.58OHM DCR

MURATA LQH32CN150K53L

OUTPUT

CONN FEMALE 3POS 2.54MM PITCH R/A GOLD

SULLINS PPPC031LGBN-RC

CONN-PCB 3POS HEADER WIRE TO BRD WAFER ASSY STRAIGHT

2MM PITCH (Note 1)

MOLEX 53253-0370

RES SMD 261K Ohm 1% 1/8W 0805

YAGEO RC0805FR-07261KL

RES SMD 30.1K Ohm 1% 1/8W 0805 AEC-Q200

PANASONIC ERJ-6ENF3012V

R3, R4

RES SMD 0 Ohm JUMPER 1/8W 0805 AEC-Q200

VISHAY CRCW08050000Z0EA

R5, R6, R7

RES SMD 0 Ohm JUMPER 1/8W 0805 AEC-Q200 (Note 1)

VISHAY CRCW08050000Z0EA

IC-ADI 1.3MEGHZ STEP-UP DC/DC CONVERTERS WITH

INTEGRATED SCHOTTKY

ANALOG DEVICES LT3461ES6#PBF

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

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.

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

GND

LT3461 BOOST

FEMALE

MALE

FEMALE

2 2

<DESIGN_VIEW>

: NA

Product(s): LT3461

HW TYPE : Customer Evaluation

1:1

02_059992

J VIERNES

0.047UF

53253-0370

22 PF

DNI

LT3461ES6#PBF

DNI

25V

0.1UF

26 1K

15UH

25V

DNI

16V

DNI

4.7UF

PBC03SBAN

50V

DNI

0.47UF

1.0UF

50V

PPPC031LGBN-RC

30.9K

PPPC021LGBN-RC

C2 C6

OU TPUT

INP UT

VIOC

RUN

SHDN_N

VIOC

VO+

VIN

SHDN_N

VIOC

VO+

VIN

VOU T

SHDN_N

GND

AGN D

AGND

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

IT IS NOT TO BE REPRODUCED OR COPIED, IN WHOLE OR

DRAWING NO.

SCALE

SIZE

REV

SHEET

APPROVED

DESCRIPTION

REVISIONS

OL G

OWNED OR CONTROLLED BY OWNED ANALOG DEVICES.

OF ANALOG DEVICES.

SCHEMATIC

PTD ENGI NEER

DESIG N VIEW

REV DATE

DEMO MANUAL SCP-LT3461-EVALZ

Rev. 0

11/2 0

www.analog.com

ESD Caution

ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection

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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