Linear Technology DC2453A Quick setup guide

1
dc2453afb
DEMO MANUAL DC2453A
Description
LTM4643EV
Quad DC/DC µModule Regulator
with Configurable 3A Output Array
Demonstration circuit 2453A features the LT M
®
4643
µModule
®
regulator, a high performance high efficiency
4 output step-down regulator. The LTM4643EV has an
operating input voltage range of 4V to 20V and is able
to provide up to 3A out output current from each of its
phases. Each output’s voltage is programmable from 0.6V
to 3.3V. The LTM4643EV is a complete DC/DC point of load
regulator in a thermally enhanced 15mm ×9mm×1.82mm
LGA package requiring only a few input and output ca-
pacitors. Output voltage tracking is available through the L, LT, LTC, LTM, Linear Technology, the Linear logo and μModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
BoarD photo
TRACK/SS pin for supply rail sequencing. External clock
synchronization is also available through the CLKIN pin.
The CLKOUT pin provides for synchronization of additional
modules’ phases. The LTM4643 data sheet must be read
in conjunction with this demo manual for working on or
modifying demo circuit 2453A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2453A
Figure 1. Quad 3A LTM4643; DC2453A

2
dc2453afb
DEMO MANUAL DC2453A
Quick start proceDure
Demonstration circuit 2453A is an easy way to evaluate the
performance of the LTM4643EV. Please refer to Figure 1
for test setup connections and follow the procedure below.
1. With power off, place the jumpers in the following
positions:
JP1 JP2 JP3 JP2
RUN1 RUN2 RUN3 RUN4
ON ON ON ON
JP8 JP7 JP6 JP5
MODE1 MODE2 MODE3 MODE4
CCM CCM CCM CCM
2. Before connecting input supply, loads and meters, preset
the input voltage supply to be between 4V to 20V. Preset
the load currents to 0A.
3. With power off, connect the loads, input voltage supply
and meters as shown in Figure 1.
4. Turn on input power supply. The output voltage meters
for each phase should display the programmed output
voltage ±2%.
5. Once the proper output voltage is established, adjust the
load currents for each phase within the 0A to 3A range
and observe the load regulation, efficiency, and other
parameters. Output voltage ripple should be measured
at J6 with a BNC cable and oscilloscope.
6. To observe increased light load efficiency place, a Mode
pin jumper (JP5-JP8) in the DCM Mode position.
performance summary
PARAMETER CONDITIONS/NOTES VALUE
Input Voltage Range 4V – 20V
Output Voltage VOUT Jumper Selectable VOUT1 = 3.3VDC, VOUT2 = 2.5VDC, VOUT3 =
1.5VDC, VOUT4 = 1.2VDC
Maximum Continuous Output Current per Phase Derating is Necessary for Certain Operating
Conditions. See Data Sheet for Details
3ADC
Default Operating Frequency 1.2MHz
Efficiency VIN = 12V, VOUT1 = 3.3V, IOUT = 3A 89% See Figure 2

3
dc2453afb
DEMO MANUAL DC2453A
Figure 2. Test Setup of DC2453A
Quick start proceDure

4
dc2453afb
DEMO MANUAL DC2453A
Figure 2. Measured Supply Efficiency at 5VIN and 12VIN
Figure 3. Measured VOUT1 = 3.3V and VOUT4 = 1.2V Load Transient Responses (1.5A to 3A Load Step)
OUTPUT CURRENT (A)
0
0.5
1
1.5
2
2.5
3
65
70
75
80
85
90
95
100
EFFICIENCY (%)
dc2453a F02a
3.3VOUT1
2.5VOUT2
1.5VOUT3
1.2VOUT4
OUTPUT CURRENT (A)
0
0.5
1
1.5
2
2.5
3
65
70
75
80
85
90
95
100
EFFICIENCY (%)
dc2453a F02b
3.3VOUT1
2.5VOUT2
1.5VOUT3
1.2VOUT4
Quick start proceDure
VIN (V) VOUT (V) COUT CERAMIC
12 3.3 2 × 47μF/6.3V/Ceramic
VIN (V) VOUT (V) COUT CERAMIC
12 1.2 2 × 47μF/6.3V/Ceramic
VOUT1
100mV/DIV
IOUT1_STEP
1A/DIV
VOUT1
100mV/DIV
IOUT1_STEP
1A/DIV

5
dc2453afb
DEMO MANUAL DC2453A
Figure 4. Measured Thermal Capture with All Phases at Full Load (3A)
VIN (V) AIRFLOW AMBIENT (°C)
5 Natural Convection 28
Quick start proceDure

6
dc2453afb
DEMO MANUAL DC2453A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, C3 CAP, CER, 22μF, 25V, X5R, 20%, 1206 MURATA, GRM31CR61E226ME15L
2 1 C6 CAP, X5R, 1μF, 16V 10%, 0603 AVX, 0603YD105KAT2A
3 4 C9, C17 ,C28, C36 CAP, CER, 47μF, 6.3V, X5R, 20%,1210 AVX, 12106D476MAT2A
4 4 C10, C16, C29, C35 CAP, CER, 47μF, 6.3V, X5R, 20%, 1206 TAIYO YUDEN, JMK316ABJ476MLHT
5 4 C25, C26, C45, C46 CAP, CER, 0.10μF, 50V, X7R, 10%, 0603 TDK, C1608X7R1H104K
6 1 R1 RES, 10k, 1%, 1/10W, 0603 VISHAY, CRCW060310K0FKED
7 1 R2 RES, 1Ω, 5%, 1/10W, 0603 VISHAY,CRCW06031R00JNEA
8 1 R3 RES, 13.3k, 1%, 1/10W, 0603 VISHAY CRCW060313K3FKEA
9 1 R4 RES, 40.2k, 1%, 1/10W, 0603 VISHAY CRCW060340K2FKEA
10 1 R11 RES, 19.1k, 1%, 1/10W, 0603 VISHAY CRCW060319K1FKEA
11 1 R12 RES, 60.4k, 1%, 1/10W, 0603 VISHAY CRCW060360K4FKEA
12 1 R28 RES, 0805, 0Ω 5% 1/16W VISHAY, CRCW08050000Z0EA
13 1 U1 LTM4643EV, BGA-15X9-5.01 LINEAR TECH. CORP. LTM4643EV#PBF
Additional Demo Board Circuit Components
1 2 C4, C5 CAP, CER, 22μF, 25V, X5R, 20%, 1206 MURATA, GRM31CR61E226ME15L
2 1 C2 CAP, POSCAP, 33μF, 25V, 7343 PANASONIC, 25TQC33MYF
3 6 C7, C21, C22, C31, C41, C42 CAP, 0603 OPTION
4 4 C8, C18, C27, C37 CAP, POSCAP, 7343 OPTION
5 8 C11, C12, C14, C15, C30, C33, C34, C38 CAP, CER, 1206 OPTION
6 2 C13, C32 CAP, CER, 100pF, 25V, X7R, 10%, 0603 AVX 06033C101KAT2A
7 4 R7, R8, R15, R16 RES, 0Ω, 1%, 1/10W, 0603 VISHAY, CRCW06030000Z0ED
8 4 R19, R20, R21, R22 RES, 150k, 5%, 1/10W, 0603 VISHAY CRCW0603150KJNEA
9 8 R23, R24, R25, R26, R27, R29, R30, R31 RES, 100k, 5%, 1/10W, 0603 VISHAY CRCW0603100KJNEA
10 16 R9, R10, R17, R18, R32-R35, R37-R40,
R42-R45
RES, 0603,OPT OPT
11 3 R36, R41, R46 RES, 0 OHM, 2512,OPT OPT
Hardware
1 16 E1, E3-E17 TESTPOINT, TURRET 0.094" MILL MAX 2501-2-00-80-00-00-07-0
2 2 J1, J2 JACK, BANANA KEYSTONE 575-4
3 8 JP1-JP8 HEADER, 0.079" SINGLE ROW, 3-PIN SULLINS, NRPN031PAEN-RC
4 8 XJP1-XJP8 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
5 4 STAND-OFFS STAND-OFF
, NYLON 0.375" TALL (SNAP ON) KEYSTONE, 8832

7
dc2453afb
DEMO MANUAL DC2453A
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
5
5
4
4
3
3
2
2
1
1
D
D
C
C
B
B
A
A
4V - 20V
GND VOUT3 GND
CLKIN
TRACK2
VIN
1.5V / 3A MAX
1.2V / 3A MAX
VOUT4 GND
3.3V / 3A MAX VOUT1 GND 2.5V / 3A MAX VOUT2 GND
TEMP
ON OFF
ON OFF
ON OFF
ON OFF
TRACK1 TRACK3
TRACK4
OPTIONAL JUMPERS FOR
PARALLEL OPERATION
CCM DCM
7343
7343 7343
RUN1 RUN2 RUN3 RUN4
7343
7343
m
1210
1210
1210
1210
VIN+ GND
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS AND CAPACITORS ARE 0603.
MODE4
CCM DCM
MODE3
CCM DCM
MODE2
CCM DCM
MODE1
VIN
VOUT3
INTVCC3 INTVCC4
VOUT4
INTVCC1
SS1
FB1
VOUT1
COMP1 INTVCC2
SS2
COMP2
SS3 SS4
FB1 FB3 FB4
FB2
FB2 FB3 COMP2 COMP3
COMP1 COMP3 COMP4
COMP2
SS2 SS3 SS1 SS3 SS4
SS2
RUN2 RUN3 RUN1 RUN3 RUN4
RUN2
COMP4 COMP3
VOUT2 VOUT3 VOUT1 VOUT3 VOUT4
VOUT2
FB2 FB4
FB3
VOUT2
INTVCC1 INTVCC2 INTVCC3 INTVCC4
VIN
RUN1 RUN2 RUN3 RUN4
RUN1 RUN2 RUN3 RUN4 INTVCC4 INTVCC3 INTVCC1INTVCC2
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
1
LTM4643EV
Wednesday, July 29, 2015 1 1
QUAD 3A STEP-DOWN MODULE REGULATOR
LT
SAM Y.
N/A
DEMO CIRCUIT 2453A
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
1
LTM4643EV
Wednesday, July 29, 2015 1 1
QUAD 3A STEP-DOWN MODULE REGULATOR
LT
SAM Y.
N/A
DEMO CIRCUIT 2453A
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] 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
1
LTM4643EV
Wednesday, July 29, 2015 1 1
QUAD 3A STEP-DOWN MODULE REGULATOR
LT
SAM Y.
N/A
DEMO CIRCUIT 2453A
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
SAM Y.
PRODUCTION
107-29-15
_
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
SAM Y.
PRODUCTION
107-29-15
_
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
SAM Y.
PRODUCTION
107-29-15
_
JP3
1
2
3
R25 100K 1%
R20 150K
+
C8
OPT
JP7
1
2
3
JP1
1
2
3
R8
0
R1
10K
E4
R38
OPT
R18 OPT
C22
OPT
R39
OPT
C4
22uF
25V
1206
C25
0.1uF
TP2
PGOOD2
C30 OPT
1206
R45
OPT
R12
60.4K
R35
OPT
E7
C32 100pF
C5
22uF
25V
1206
R28
0
0805
R46
OPT2512
+
C37 OPT
C21
OPT
TP1
PGOOD1
JP5
1
2
3
R10 OPT
C41 OPT
JP2
1
2
3
JP8
1
2
3
+
C18
OPT
C3
22uF
25V
1206
C13 100pF
E11
J2
C38 OPT
1206
TP3
PGOOD3
E10
C14 OPT 1206
C46
0.1uF
C26
0.1uF
JP4
1
2
3
C9
47uF
6.3V
R26 100K 1%
R44
OPT
R21 150K
R19 150K
E9
C28
47uF
6.3V
C42
OPT
R17
OPT
R27
100K
E8
R24 100K 1%
E3
C11
OPT
1206
R34
OPT
R7
0
R30
100K
C45
0.1uF
C12
OPT 1206
R33
OPT
E15
R36
OPT2512
R11
19.1K
R41
OPT2512
TP4
PGOOD4
R23 100K 1%
R29
100K
E1
E17
R40
OPT
JP6
1
2
3
C29
47uF
6.3V
1206
C16 47uF 6.3V 1206
E14
C10
47uF
6.3V 1206
TP5
CLKOUT
C36 47uF 6.3V
E16
R9 OPT
LTM4643EV
U1
GND
B2
VOUT1
A1 VOUT3 F1
VOUT4 J1
VOUT2
C1
GND
D3
GND
A4
PGOOD2
C2
PGOOD3
F2
PGOOD4
J2
PGOOD1
C3
TEMP F3
CLKOUT J3
INTVCC1
C4
INTVCC2
F4
INTVCC3 J4 INTVCC4 K5
TRACK/SS1
A6
MODE1 B6
RUN1
C6
TRACK/SS2
D6
MODE2 E6
RUN2
F6
TRACK/SS4 K6
MODE4 L6
RUN4
K7
FB4 J7
TRACK/SS3 G6
MODE3 H6
RUN3
J6
FB1
A7
COMP1
B7
CLKIN C7
FB2
D7
COMP2
E7
SGND
F7
FB3 G7
COMP3 H7 COMP4 L7
VIN1 B3
VIN2 E3
VIN3 H3
VIN4 L3
SVIN1 B5
SVIN2 E5
SVIN3 H5
SVIN4 L5
GND
A5
GND
B1
VOUT1
A2
VOUT1
A3
VIN3 H4
VIN4 L4
VIN2 E4
VIN1 B4
VOUT3 G1 VOUT3 G2 VOUT4 K2 VOUT4 K1
GND
L1
GND
H1
GND
E1
GND
E2 GND
H2 GND
L2
GND
G3 GND
K3
GND
D4 GND
G4 GND
K4
GND
C5
GND
D5
GND
F5
GND
G5
GND
J5
VOUT2
D2 VOUT2 D1
E6
R31
100K
E13
R4
40.2K
C6
1uF
C15 OPT 1206 C34 OPT 1206
C31 OPT
C17 47uF 6.3V
C1
22uF
25V
1206
E5
+
C2
33uF
25V
R43
OPT
E12
J1
R37
OPT
R16
0
C33 OPT 1206
R32
OPT
R3
13.3K
R15
0
C35 47uF 6.3V 1206
R22 150K
R42
OPT
+
C27 OPT
C7
OPT
R2 1

8
dc2453afb
DEMO MANUAL DC2453A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0916 REV B • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation