Linear Technology DC2283A Guía de configuración rápida

dc2283af

DEMO MANUAL DC2283A

DESCRIPTION

LTC3884EUK

Polyphase Single 160A Output Synchronous Buck

Converter with Power System Management

Demonstration circuit 2283A is a high efficiency, high

density, single-output Buck converter with 7V to 14V input

range. The output voltage is adjustable from 0.5V to 1.5V,

and can supply up to 160A of load current with a 1V output.

The demo board offers the option to be configured as a

dual-output converter, contact factory for details. VOUT0

can supply a 40A maximum load current and VOUT1 can

supply a 120A maximum load current. The demo board

features the LTC3884, a dual output poly phase step-down

controller for ultra-low DCR sensing with digital power

system management. Please see LTC

3884 data sheet

for more detailed information.

DC2283A powersup todefault settingsand producespower

based on configuration resistors or with its non-volatile

memory without the needfor anyserialbus communication.

This allows easy evaluation of the DC/DC converter. To fully

explore the extensive power system management features

of the part, download the GUI software LTpowerPlay™

on-to your PC and use LTC’s I2C/SMBus/PMBus dongle

DC1613A to connect to the board. LTpowerPlay allows

the user to reconfigure the part on the fly and store the

configuration in EEPROM, view telemetry of voltage,

current, temperature and fault status.

GUI Download

The software can be downloaded from:

http://www.linear.com/ltpowerplay

For more details and instructions of LTpowerPlay, please

refer to LTpowerPlay GUI for LTC3884 demo manual.

Design files for this circuit board are available at

http://www.linear.com/demo/DC2283A

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

Specifications are at TA= 25°C

PARAMETER CONDITIONS VALUE

Input Voltage Range 7V to 14V

Output Voltage, VOUT1 VIN = 7V to 14V, Single Output, IOUT = 0A to 160A(1) Default: 1V

Maximum Output Current, IOUT = IOUT0 + IOUT1 VIN = 7V to 14V, Single Output, VOUT1 = 0.5V to 1.5V(2) 160A

Typical Efficiency VIN = 12V, Single Output, VOUT1 = 1.0V, 160A Load 89.6%

Peak Efficiency VIN = 12V, Single Output, VOUT1 = 1.0V, 90A Load 90.7%

Default Switching Frequency 425kHz

Note 1: Both VOUT0 and VOUT1 terminals need to be used when drawing > 100A output current.

Note 2: For VOUT1 < 0.75V, fSW needs to be reduced due to tON(MIN) limitation.

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dc2283af

DEMO MANUAL DC2283A

QUICK START PROCEDURE

Demonstration circuit 2283A is easy to set up to evaluate

the performance of the LTC3884. Refer to Figure 1 for

the proper measurement equipment setup and follow the

procedure below.

1. With power off, connect the input power supply to VIN

(7V – 14V) and GND (input return).

2. Connect the output loads between VOUT0/ VOUT1 and

GND (Initial load: no load). Refer to Figure 1.

3. Connect the DVMs to the input and output.

4. Check the default jumper/switch position: JP1: OFF;

JP4: OFF; JP5: INT; SW1: OFF; SW2: OFF.

5. Turn on the input power supply and adjust voltage to

12V;

NOTE.Make sure thatthe input voltagedoes not exceed14V.

6. Turn on the switches: SW1:ON; SW2:ON;

7. Check for the proper output voltages from VOUT1+ to

VOUT1–.

8. Once the proper output voltage is established, adjust

the loads within the operating range and observe the

output voltage regulation, ripple voltage and other

parameters.

9. Connect the dongle and control the output voltage from

the GUI. See “LTpowerPlay Quick Start Guide” session

for details.

Notes:

1. As stated in the Description section, demonstration

circuit 2283A provides an option to be configured as

a dual-output converter. When the board is set up as a

single-output converter (the default setup), four 0Ω shunt

resistors are populated to short VOUT0 and VOUT1. Please

follow Figure 1 to set up the connection of two loads to

the output terminals to avoid board damage.

Figure 1. Proper Measurement Equipment Setup

DC2447 F01

LOAD1

(120A)

1mΩ

–

+–

LOAD0

(40A)

1mΩ

–

1mΩ

+–

–

VIN

7V TO 14V

VOUT

–

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DEMO MANUAL DC2283A

QUICK START PROCEDURE

Figure 2. Measuring Output Voltage Ripple

Figure 3. Demo Setup with PC

+ –

VOUT GND

COUT

2. When measuring the output or input voltage ripple, do

not use the long ground lead on the oscilloscope probe.

See Figure 2 for the proper scope probe technique. Short,

stiff leads need to be soldered to the (+) and (–) terminals

of an output capacitor. The probe’s ground ring needs to

touch the (–) lead and the probe tip needs to touch the

(+) lead.

Connecting a PC to DC2283A

You can use a PC to reconfigure the power management

features of the LTC3884 such as:nominal VOUT, margin

setpoints, OV/UVlimits, temperature faultlimits, sequenc-

ing parameters, the fault log, fault responses and other

functionality. The DC1613A dongle may be plugged when

VIN is present.

VOUT

12-PIN (J14)

CONNECTOR

USB CABLE VIN

INPUT POWER

SUPPLY

LOAD

(UP TO 160A)

USB TO I2C/PMBus

DONGLE DC1613A

LTC3884 DEMO

BOARD DC2283A

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dc2283af

DEMO MANUAL DC2283A

QUICK START PROCEDURE

OUTPUT LOAD CURRENT (A)

EFFICIENCY (%)

75 60 14030 100

DC2283 F04

16040 12020 8070 15011050 1309010 2µs/DIV

VOUT1

(20MHz BW)

5mV/DIV

DC2283 F05

50µs/DIV

DC2283 F06

200mV/DIV

VOUT1

20m V/DIV

0A TO 40A LOAD STEP

OUT1

MEASURED AT BNC J11 (20MHz BW)

TOTAL LOAD CURRENT (A)

LOAD CURRENT PER PHASE (A)

60 140100

DC2283 F07

16040 12020 80

PHASE #1

PHASE #2

PHASE #3

PHASE #4

Figure 4. Efficiency vs Load Current at

VIN=12V, VOUT1=1V, fSW=425kHz

Figure 6. Transient Response at VIN=12V,

VOUT1=1V

Figure 5. Output Voltage Ripple at VIN=12V,

VOUT1=1V, IOUT=160A (IOUT0=40A, IOUT1=120A)

Figure 8. Thermal Performance at VIN=12V, VOUT1=1V,

IOUT=160A, TA=23°C, No Airflow

Figure 7. Current Sharing vs Load Current

at VIN=12V, VOUT1=1V, fSW=425kHz

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dc2283af

DEMO MANUAL DC2283A

LTpowerPlay SOFTWARE GUI

Figure 9. LTpowerPlay Main Interface

LTpowerPlay is a powerful Windows based develop-

ment environment that supports Linear Technology

power system management ICs, including the LTM4676,

LTC3880, LTC3883, LTC3884, LTC2974 and LTC2978.

The software supports a variety of different tasks. You

can use LTpowerPlay to evaluate Linear Technology ICs

by connecting to a demo board system. LTpowerPlay can

also be used in an offline mode (with no hardware pres-

ent) in order to build a multichip configuration file that

can be saved and reloaded at a later time. LTpowerPlay

provides unprecedented diagnostic and debug features. It

becomes a valuable diagnostic tool during board bring-up

to program or tweak the power management scheme in

a system, or to diagnose power issues when bringing up

rails. LTpowerPlay utilizes the DC1613A USB-to-SMBus

controller to communicate with one of many potential

targets, including the LTM4676, the LTC3880, LTC3884

and the LTC3883’s demo system, or a customer board.

The software also provides an automatic update feature

to keep the software current with the latest set of device

drivers and documentation. The LTpowerPlay software

can be downloaded from:

http://linear.com/ltpowerplay

To access technical support documents for LTC Digital

Power Products visit Help. View online help on the

LTpowerPlay menu.

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dc2283af

DEMO MANUAL DC2283A

LTpowerPlay QUICK START PROCEDURE

The followingprocedure describes how to useLTpowerPlay

to monitor and change the settings of LTC3884.

1. Download and install the LTpowerPlay GUI:

http://linear.com/ltpowerplay

2. Launch the LTpowerPlay GUI.

a. The GUI should automatically identify the DC2283A.

The system tree on the left hand side should look

like this:

b. A green message box shows for a few seconds in

the lower left hand corner, confirming that LTC3884

is communicating:

c. In the Toolbar, click the “R” (RAM to PC) icon to

read the RAM from the LTC3884. This reads the

configuration from the RAM of LTC3884 and loads

it into the GUI.

d. If you want to change the output voltage to a different

value, like 1.2V. In the Config tab, type in 1.2 in the

VOUT_COMMAND box, like this:

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dc2283af

DEMO MANUAL DC2283A

LTpowerPlay QUICK START PROCEDURE

Then, click the “W” (PC to RAM) icon to write these

step, you will see the output voltage will change to

1.2V.

If the write is successful, you will see the following

message:

e. You can save the changes into the NVM. In the tool

bar, click “RAM to NVM” button, as following

f. Save the demo board configuration to a (*.proj)

file. Click the Save icon and save the file with a user

filename.

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

Required Circuit Components

1 16 CIN1, CIN2, CIN3, CIN4, CIN5, CIN6, CIN7, CIN8,

CIN9, CIN10, CIN11, CIN12, CIN13, CIN14, CIN15,

CIN16

CAP, 1210 22µF 10% 25V X7R MURATA, GRM32ER71E226KE15L

2 16 COUT1, COUT2, COUT5, COUT6, COUT10, COUT11,

COUT12, COUT16, COUT19, COUT20, COUT24,

COUT25, COUT27, COUT28, C34, C35

CAP, 1210 100µF 20% 6.3V X5R TDK, C3225X5R0J107M

3 12 COUT3, COUT4, COUT7, COUT8, COUT9, COUT13,

COUT14, COUT15, COUT17, COUT18, COUT22,

COUT23

CAP, 7343 470µF 20% 2.5V PANASONIC, ETPF470M5H

4 6 C7, COUT21, COUT26, C36, C41, C42 CAP, 0603 1µF 20% 25V X5R AVX, 06033D105MAT2A

5 2 C1, C47 CAP, 0603 2.2µF 20% 6.3V X5R TDK, C1608X5R0J225M

6 2 C2, C32 CAP, 270µF 20% 16V OSCON PANASONIC, 16SVPG270M

7 2 C3, C23 CAP, 0805 2.2µF 10% 16V X5R TDK, C2012X5R1C225K125AC

8 4 C4, C6, C24, C29 CAP, 0603 4.7µF 10% 10V X5R AVX, 0603ZD475KAT2A

9 4 C8, C15, C37, C46 CAP, 0603 0.1µF 10% 25V X7R AVX, 06033C104KAT2A

10 4 C9, C16, C21, C33 CAP, 0603 220nF 10% 25V X7R TDK, C1608X7R1E224K080AC

11 2 C10, C40 CAP, 0603 150pF 5% 50V NP0 AVX, 06035A151JAT2A

12 1 C11 CAP, 0603 3.3nF 5% 50V C0G MURATA, GRM1885C1H332JA01D

13 6 C14, C17, C18, C27, C28, C38 CAP, 0603 10nF 10% 25V X7R AVX, 06033C103KAT2A

14 1 C20 CAP, 0603 47pF 5% 50V NP0 AVX, 06035A470JAT2A

15 2 C30, C44 CAP, 1210 100µF 20% 10V X5R MURATA, GRM32ER61A107ME20L

16 1 C31 CAP, 1210 10µF 10% 16V X7R MURATA, GRM32DR71C106KA01L

PARTS LIST

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dc2283af

DEMO MANUAL DC2283A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

17 2 C39, C50 CAP, 0603 100nF 20% 16V X7R AVX, 0603YC104MAT2A

18 1 C43 CAP, 0603 220pF 10% 50V X7R AVX, 06035C221KAT2A

19 1 C49 CAP, 0603 47nF 10% 25V X7R AVX, 06033C473KAT2A

20 2 R1, R129 RES, 2010 0.002Ω 1% 1W VISHAY, WSL20102L000FEA

21 2 R2, R60 RES, 0603 1Ω 1% 1/10W VISHAY, CRCW06031R00FKEA

22 25 R3, R4, R15, R19, R39, R40, R42, R43, R45, R46,

R53, R91, R109, R113, R114, R116, R117, R127,

R132, R137, R140, R147, R148, R149, R156

RES, 0603 0Ω JUMPER VISHAY, CRCW06030000Z0EA

23 14 R6, R7, R8, R10, R29, R30, R33, R34, R49, R50, R98,

R123, R124, R131

RES, 0603 10kΩ 5% 1/10W VISHAY, CRCW060310K0JNEA

24 4 R9, R11, R12, R13 RES, 0603 2kΩ 5% 1/10W VISHAY, CRCW06032K00JNEA

25 4 R14, R20, R135, R143 RES, 0603 715Ω 1% 1/10W VISHAY, CRCW0603715RFKEA

26 2 R18, R21 RES, 0603 10Ω 1% 1/10W VISHAY, CRCW060310R0FKEA

27 2 R22, R108 RES, 0603 30.1kΩ 1% 1/10W VISHAY, CRCW060330K1FKEA

28 1 R23 RES, 0603 1.96kΩ 1% 1/10W VISHAY, CRCW06031K96FKEA

29 6 R41, R44, R47, R48, R88, R90 RES, 2010 0Ω JUMPER VISHAY, CRCW20100000Z0EF

30 2 R69, R70 RES, 0603 10Ω 5% 1/10W VISHAY, CRCW060310R0JNEA

31 4 R79, R80, R125, R130 RES, 0603 200Ω 5% 1/10W VISHAY, CRCW0603200RJNEA

32 1 R81 RES, 0603 127Ω 1% 1/10W VISHAY, CRCW0603127RFKEA

33 1 R89 RES, 0603 2Ω 5% 1/10W VISHAY, CRCW06032R00JNEA

34 1 R92 RES, 0603 3.3Ω 1% 1/10W VISHAY, CRCW06033R30FKEA

35 1 R93 RES, 0603 154kΩ 1% 1/10W VISHAY, CRCW0603154KFKEA

36 1 R94 RES, 0603 1MΩ 5% 1/10W VISHAY, CRCW06031M00JNEA

37 3 R95, R96, R107 RES, 0603 20kΩ 5% 1/10W VISHAY, CRCW060320K0JNEA

38 1 R97 RES, 0603 681kΩ 1% 1/10W VISHAY, CRCW0603681KFKEA

39 1 R99 RES, 0603 301Ω 1% 1/10W VISHAY, CRCW0603301RFKEA

40 1 R100 RES, 0603 82.5Ω 5% 1/10W VISHAY, CRCW060382R5FKEA

41 1 R102 RES, 2512 0.01Ω 1% 1W VISHAY, WSL2512R0100FEA

42 1 R103 RES, VARIABLE 5k BOURNS, 3386P-1-502-LF

43 1 R104 RES, 0603 1kΩ 1% 1/10W VISHAY, CRCW06031K00FKEA

44 1 R105 RES, 0603 118kΩ 1% 1/10W VISHAY, CRCW0603118KFKEA

45 1 R106 RES, 0603 80.6kΩ 1% 1/10W VISHAY, CRCW060380K6FKEA

46 2 R128, R150 RES, 0603 4.99kΩ 1% 1/10W VISHAY, CRCW06034K99FKEA

47 2 R144, R155 RES, 0603 15.8kΩ 1% 1/10W VISHAY, CRCW060315K8FKEA

48 1 R153 RES, 0603 3.57kΩ 1% 1/10W VISHAY, CRCW06033K57FKEA

49 4 D1, D2, D3, D4 DIODE, SCHOTTKY 30V, 100mA CENTRAL SEMI, CMDSH-3 TR

50 4 D5, D6, D8, D9 LED, 0603 GREEN WURTH ELEKTRONIK, 150060GS75000

51 1 D7 LED, 0603 RED WURTH ELEKTRONIK, 150060SS75000

52 2 D12, D13 DIODE, ULTRA LOW SCHOTTKY

RECTIFIER

NXP SEMI., PMEG2005AEL, 315

53 4 L1, L2, L3, L4 IND, 0.25µH WURTH ELEKTRONIK, 744301025

54 1 L5 IND, 68µH SUMIDA, CDRH105RNP-680NC

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dc2283af

DEMO MANUAL DC2283A

PARTS LIST

ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER

55 8 Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 XSTR, DUAL CHANNEL OptiMOS

MOSFET

INFINEON, BSG0811ND

56 4 Q9, Q10, Q11, Q28 XSTR, PNP GENERAL PURPOSE DIODES INC., MMST3906-7-F

57 3 Q20, Q29, Q30 XSTR, P-CHANNEL DMOS FET DIODES INC., DMP3130L-7

58 4 Q21, Q22, Q25, Q26 XSTR, N-CHANNEL DMOS FET FAIRCHILD, 2N7002

59 2 Q23, Q24 XSTR, MOSFET, N-CHANNEL 40V VISHAY, SUD50N04-8M8P-4GE3

60 1 U1 IC, LTC3884 LINEAR TECH., LTC3884IUK#10EE-1PBF-ES

61 1 U2 IC, LTC3884 LINEAR TECH., LTC3884IUK#10EF-1PBF-ES

62 1 U4 IC, SYNCHRONOUS STEP-DOWN

CONVERTER

LINEAR TECH., LTC3630EMSE#PBF

63 1 U5 IC, LTC6992IS6-1 LINEAR TECH., LTC6992IS6-1#PBF

64 1 U6 IC, SINGLE OP AMP LINEAR TECH., LT1803IS5#PBF

65 1 U7 IC, 2k EEPROM MICROCHIP, 24LC024-I/ST

Additional Demo Board Circuit Components

1 0 CIN17, CIN18, CIN19, CIN20, CIN21, CIN22, CIN23,

CIN24

CAP, 1210 OPTION OPTION

2 0 C5, C12, C13, C45, C48 CAP, 0603 OPTION OPTION

3 0 C19 (OPTION) CAP, 0603 1500pF 5% 50V C0G MURATA, GRM1885C1H152JA01D

4 0 R5, R16, R17, R24, R25, R26, R27, R28, R31, R32,

R35, R36, R37, R38, R51, R56, R57, R59, R82, R83,

R84, R87, R110, R111, R112, R115, R118, R119,

R120, R121, R122, R126, R133, R134, R136, R138,

R139, R141, R142, R145, R146, R151, R152, R154

RES, 0603 OPTION OPTION

5 0 R85, R86, R101 RES, 2512 OPTION OPTION

6 0 D10, D11 DIODE, SCHOTTKY 30V, 100mA

OPTION

CENTRAL SEMI, CMDSH-3-TR OPTION

7 0 Q12, Q13, Q14, Q15, Q16, Q17, Q18, Q27 XSTR, POWER MOSFET OPTION OPTION

Hardware: For Demo Board Only

1 24 E1, E2, E3, E4, E5, E6, E7, E8, E9, E13, E14, E21, E22,

E23, E24, E25, E26, E27, E28, E34, E35, E36, E37, E38

TEST POINT, TURRET, .094" MTG.

HOLE

MILL MAX, 2501-2-00-80-00-00-07-0

2 4 JP1, JP2, JP4, JP5 HEADER, SINGLE ROW 3PIN SULLINS, NRPN031PAEN-RC

36 J1, J2, J3, J4, J5, J6 STUD, TEST PIN PEM, KFH-032-10

4 12 J1, J2, J3, J4, J5, J6 (x2) NUT, BRASS 10-32 ANY, #10-32

5 6 LUG RING, #10 KEYSTONE, 8205

6 6 WASHER, #10 TIN PLATED BRASS ANY, #10 EXT BZ TN

7 3 J10, J11, J12 CONN., BNC PC MOUNT RECEPT.

JACK, 50Ω, TF-4 POST

AMPHENOL CONNEX, 112404

8 1 J13 CONN., HEADER, 2X7, 2mm, R/A

(F)

SULLINS, NPPN072FJFN-RC

9 1 J14 HEADER, 12PIN 2mm STR DL FCI, 98414-G06-12ULF

10 1 J15 CONN., HEADER, 2X7, 2mm, R/A

(M)

MOLEX, 87760-1416

11 1 J16 HEADER, 4PIN 2mm STR DL HIROSE, DF3A-4P-2DSA

12 4 MH1, MH2, MH3, MH4 STANDOFF, SNAP ON KEYSTONE, 8834

13 2 SW1, SW2 SWITCH, SUBMINIATURE SLIDE C&K, JS202011CQN

14 4 XJP1, XJP2, XJP4, XJP5 SHUNT SAMTEC, 2SN-BK-G

dc2283af

DEMO MANUAL DC2283A

SCHEMATIC DIAGRAM

SHT3

NOTE:

T1 - T8 ARE EXPOSED PCB VIAS

7V - 14V

1.0V AT 160A

SHT3

OPTION FOR FOUR-PHASE CONFIGURATION CONNECTION

SHT3

744301025

WP1

OFF

744301025

SHT3

SHT 3

SHT 2,3

SCL

SDA

ALERTB

WP1

BST0

SHARE_CLK

SYNC

BG0

SW1

RUN1

RUN0

BG1

BST1

TG0

SW0

ITH_R1

TG1

ITH_R0

VDD25_1

VDD33_1

VOUT1

VOUT0

INTVCC_1

VIN1

EXTVCC

VIN1

INTVCC_1

VDD25_1

VDD33_1

VIN

INTVCC_1

VDD33_1

EXTVCC

VIN1

VDD33_1

VIN

VOUT0 VOUT1

ITH0

SW0

ITH1

SCL

SDA

PGOOD1

PGOOD0

SW1

FAULT0 FAULT1

SW0

VSENSE1-

SW1

VSENSE0- VSENSE1-

VSENSE0+

BG0

BG1

ITH0

VSENSE0-

ITH1

VSENSE1+

RUN0 RUN1

TG1

VSENSE0+ VSENSE1+

PGOOD0 PGOOD1

SHARE_CLK

SYNC

ALERTB

RUN1

RUN0

TG0

FAULT0

FAULT1

VOUT0

VOUT1

VSENSE0+

VSENSE0-

VSENSE1+

VSENSE1-

ITH_R0 ITH_R1

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGYFax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

Friday, January 22, 2016 1 4

POLYPHASE SYNCHRONOUS BUCK

` \

l _

N/A

LTC3884EUK

DEMO CIRCUIT 2283A

CONVERTER WITH POWER SYSTEM MANAGEMENT

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGYFax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

Friday, January 22, 2016 1 4

POLYPHASE SYNCHRONOUS BUCK

` \

l _

N/A

LTC3884EUK

DEMO CIRCUIT 2283A

CONVERTER WITH POWER SYSTEM MANAGEMENT

SIZE

DATE:

.VER.ONCI

SHEET OF

TITLE:

APPROVALS

PCB DES.

APP ENG.

TECHNOLOGYFax: (408)434-0507

Milpitas, CA 95035

Phone: (408)432-1900

1630 McCarthy Blvd.

LTC Confidential-For Customer Use Only

CUSTOMER NOTICE

LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A

CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS;

HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO

VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL

APPLICATION. COMPONENT SUBSTITUTION AND PRINTED

CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT

PERFORMANCE OR RELIABILITY. CONTACT LINEAR

TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE.

THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND

SCHEMATIC

SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS. SCALE = NONE

www.linear.com

Friday, January 22, 2016 1 4

POLYPHASE SYNCHRONOUS BUCK

` \

l _

N/A

LTC3884EUK

DEMO CIRCUIT 2283A

CONVERTER WITH POWER SYSTEM MANAGEMENT

REVISION HISTORY

DEVORPPAETADNOITPIRCSEDECO REV

lA _A

PROD

-212/17/15

REVISION HISTORY

DEVORPPAETADNOITPIRCSEDECO REV

lA _A

PROD

-212/17/15

REVISION HISTORY

DEVORPPAETADNOITPIRCSEDECO REV

lA _A

PROD

-212/17/15

R19

LTC3884EUK

TG1/PWM1 35

SW1 34

BOOST1 36

IIN-47

PGND

BOOST0 43

SW0 45

ITH_R0

SYNC

SCL

SDA

ALERTB

SHARE_CLK

RUN0

RUN1

ITH_R1

ITH1

TSNS0

TSNS1

ASEL0

ASEL1

VDD33 28

ITH0

VDD25 25

IIN+46

FAULT0 15

FAULT1 16

BG1/EN1 37

ISENSE1+ 3

VOUT1_CFG

22 VSENSE1- 31

VSENSE1+ 32

ISENSE1- 4

VSENSE0+ 1

ISENSE0- 8

ISENSE0+ 7

BG0/EN0 42

VOUT0_CFG

VSENSE0- 2

GND

FREQ_CFG

PHASE_CFG

PGOOD1

PGOOD0

TG0/PWM0 44

INTVCC 38

VIN 39

EXTVCC

VOUT1+

R14

715

COUT7

470uF

2.5V

7343

C12 OPT

R30

10K

BSG0811ND

R33

10K

C17

10nF

L1 0.25uH

GND

R38 OPT

C3 2.2uF

0805

JP1

R16

OPT

VOUT1-

COUT1

100uF

1210

6.3V

R17 OPT

R156

10K

COUT6

100uF

1210

6.3V

GND

R12

2k R13

R42

CIN7

22uF

1210

R11

R21

VIN

BSG0811ND

C10 150pF

R46

E14

PGOOD1

VIN-

R27 OPT

R41 0

2010

COUT8

470uF

2.5V

7343

R29

10K

COUT5

100uF

1210

6.3V

R114

R45

COUT3

470uF

2.5V

7343

VOUT0+

R34

10K

VIN+

R20

715

EXTVCC

COUT2

100uF

1210

6.3V

OPT

R43

R31 OPT

OPT

C6 4.7uF

220nF

CMDSH-3-TR

CIN1

22uF

1210

C32

270uF

16V

R113

E13

PGOOD0

VOUT1

C1 2.2uF

0.002

2010

VOUT0

270uF

16V

R36 OPT

C16

220nF

0.1uF

CIN2

22uF

1210

R22 30.1k 1%

R48 0

2010

R28 OPT

BSG0811ND

R10

10K

CIN6

22uF

1210

GND

L2 0.25uH

VOUT0-

R47 0

2010

C15

0.1uF

CMDSH-3-TR

C7 1.0uF

R35 OPT

E38

GND

CIN5

22uF

1210

R39

R32 OPT

R37 OPT

C13 OPT

R26

OPT

R44 0

2010

BSG0811ND

R23 1.96k 1%

C11 3.3nF

R15 0

COUT4

470uF

2.5V

7343

CIN4

22uF

1210

R24 OPT

10K

C14

10nF

Q10

MMBT3906-AL3-R

SOT-323

CIN3

22uF

1210

MMBT3906-AL3-R

SOT-323

R2 1 1%

R40

10K

C4 4.7uF

R18

R25

OPT

CIN8

22uF

1210

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