Linear Technology DC823B-A Quick setup guide

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DEMO MANUAL DC823B-A
DESCRIPTION
LTM4600:
20V, 10A Step-Down Power
µModule
®
Regulator
Demonstration circuit DC823B-A features the
LT M
®
4600EV, a 10A high efficiency, high density switch
mode step-down power module. The input voltage is from
4.5V to 20V. The output voltage is programmable from
0.6V to 5V. The rated load current is 10A, while derating is
necessary for different VIN, VOUT, and thermal conditions.
Integrated input and output filters enable a simple PCB
layout. Only bulk input and output capacitors are needed.
L, LT, LTC, LTM, µModule, 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
BOARD PHOTO
The LTM4600 data sheet must be read in conjunction with
this demo manual prior to working on or modifying demo
circuit DC823B-A.
Design files for this circuit board are available at
http://www.linear.com/demo
(TA= 25°C)
PARAMETER TEST CONDITION VALUE
Input Voltage Range 4.5V to 20V
Output Voltage VOUT Selectable with Jumpers (Open for 0.6V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
Maximum Continuous Output Current 5V to 20VIN, 1.5VOUT 10 ADC
Efficiency VIN = 12V, VOUT = 1.5V, IOUT = 10A 82%, See Figure 2
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DEMO MANUAL DC823B-A
QUICK START PROCEDURE
Figure 1. Test Set-Up of DC823B-A (EXTVCC VBIAS Supply is Optional)
Demonstration circuit DC823B-A is an easy way to evalu-
ate the performance of the LTM4600EV. Refer to Figure 1
for proper measurement equipment set-up and follow the
procedure below:
1. Place jumpers in the following positions for a typical
1.5VOUT application:
FCB RUN/SS VOUT Select
CCM ON 1.5V
2. With power off, connect the input power supply,
load, optional 5V bias supply and meters as shown in
Figure 1. Preset the load to 0A and VIN supply to be less
than 20V. The optional 5V bias supply applied to the
EXTVCC pin must be off while the main VIN is turned off.
3. Turn on the power at the input. The output voltage
should be 1.5V ± 2%.
4. Once the proper output voltage is established, adjustthe
load within the operating range and observe the output
voltage regulation, ripple voltage, efficiency and other
parameters. Output voltage ripple should be measured
at J6 with a BNC cable.
5. For optional load transient test, apply an adjustable
pulse signal between IOSTEP CLK and GND pins.
Pulse amplitude sets the current step. The pulse signal
should have very small duty cycle (<15%) to limit the
thermal stress of the transient load circuit. The output
transient current can be monitored at BNC connector
J5 (10mV/A).
+
–
+–
V
+–
LOAD
0A TO 10A
+
–
A
+
–
+–
A
+
–
V
dc823ba FO1
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DEMO MANUAL DC823B-A
Figure 2. Measured Supply Efficiencies with Different VIN and VOUT
QUICK START PROCEDURE
Figure 3. Measured Load Transient Response (0A to 10A Step)
Efficiency vs Load Current with
5VIN (FCB = 0)
Efficiency vs Load Current with
12VIN (FCB = 0)
LOAD CURRENT (A)
0
EFFICIENCY (%)
40
50
60
6 8 10
90
100
30
42 12
70
80
0.6VOUT
1.2VOUT
1.5VOUT
2.5VOUT
dc823bb F02a LOAD CURRENT (A)
0
100
EFFICIENCY (%)
20
40
50
60
6 8 10
dc823bb F02b
90
30
42 12
70
80
0.6VOUT
1.2VOUT
1.5VOUT
2.5VOUT
3.3VOUT
VIN = 12V
VOUT = 1.5V
FCB = 0
0A TO 10A LOAD STEP
COUT = 2 × 100µF/X5R/1210
332mVP-P
IOUT
(5A/DIV)
VOUT
(200mV/DIV)
dc823ba F03
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DEMO MANUAL DC823B-A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C1 CAP, 150µF 20% 35V ALUM SANYO 35MV150WXV (now SUNCON 35ME150WXV)
2 2 C5, C2 CAP, 1206 10µF 20% 25V X5R TDK C3216X5R1E106MT
3 2 C7, C8 CAP, 1812 100µF 20% 6.3V X5R TDK C4532X5R0J107M
4 1 C10 CAP, 1206 22µF 20% 6.3V X5R TAIYO YUDEN JMK316BJ226ML-T
5 1 C12 CAP, 0603 100pF 10% 50V X7R AVX 06035C101KAT1A
6 1 R1 RES, 0603 49.9k 1% 1/10W AAC CR16-4992FM
7 1 R8 RES, 0603 0Ω JUMPER VISHAY CRCW06030000Z0EA
8 1 U1 IC, LTM4600EV LINEAR TECHNOLOGY LTM4600EV
Additional Demo Board Circuit Components
1 0 C4, C3 CAP, 1206 OPTION TAIYO YUDEN EMK316BJ475ML-T OPTION
2 0 C8 CAP, 1812 OPTION TAIYO YUDEN JMK432BJ107MU-T OPTION
3 0 C11, C14, C18,
C19
CAP, 0603 OPTION OPTION
4 1 C13 CAP, 0603 100pF 10% 50V NPO AVX 06035A101KAT
5 2 C15, C16 CAP, 0603 1µF 20% 10V X5R TAIYO YUDEN LMK107BJ105MA-T
6 0 C17 CAP, 0805 1µF 20% 16V X5R OPTION TAIYO YUDEN EMK212BJ105MG-T
7 1 D1 DIODE, ZENER 4.7V DIODES INC. BZX84C4V7-7-F
8 1 Q14 XSTR, SUD50N03-10CP MOSFET SILICONIX SUD50N03-10CP-E3
9 1 R2 RES, 0603 66.5k 1% 1/10W AAC CR16-6652FM
R2 - ALTERNATE RES, 0603 66.5k 1% 1/10W VISHAY CRCW06036652F
10 1 R3 RES, 0603 31.6k 1% 1/10W AAC CR16-3162FM
R3 - ALTERNATE RES, 0603 31.6k 1% 1/10W PANASONIC ERJ-3EKF3162V
11 1 R4 RES, 0603 22.1k 1% 1/10W AAC CR16-2212FM
12 1 R5 RES, 0603 13.7k 1% 1/10W AAC CR16-1372FM
13 3 R6, R10, R12 RES, 0603 10k 5% 1/10W VISHAY CRCW060310K0JNEA
R6, R10,
R12- ALTERNATE
RES, 0603 10k 5% 1/10W PANASONIC ERJ-3GEY512V
14 1 R7 RES, 0603 5.1k 5% 1/10W AAC CR16-512JM
15 1 R9 RES, 0603 1MΩ 5% 1/16W AAC CR16-105JM
16 1 R11 RES, 2512 0.01Ω 5% 1W IRC LRF2512-01-R010-J
17 0 R13 RES, 0603 OPTION OPTION
18 1 R14 RES, 0603 100k 1% 1/10W AAC CR16-1003FM
Hardware
1 6 JP0 TO JP5 HEADER, 2-PIN, 2mm COMM CON 2802S-02G2
2 2 JP6, JP7 HEADER, 3-PIN, 2mm COMM CON 2802S-03G2
3 4 J1, J2, J3, J4 JACK, BANANA KEYSTONE 575-4
4 2 J5, J6 CONN, BNC, 5 PINS CONNEX 112404
5 14 TP1 TO TP14 TURRET MILL-MAX 2501-2-00-80-00-00-07-0
6 3 JP3, JP6, JP7 SHUNT SAMTEC 2SN-BK-G
7 4 STANDOFF, SNAP ON KEYSTONE_8831
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DEMO MANUAL DC823B-A
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
1
DCM
CCM
2
1 3
2
VIN
GND
VIN+ VIN-
EXTVCC
SVIN FADJ
VOSET
FCB
PWRGD
SGND
IOSTEP
CLK
VO+
VOUT
GND VO-
RUN/SS
JUMPER VOUT
JP0 JP1 JP2 JP3 JP4 JP5
1.2V
1.5V
1.8V
2.5V
3.3V
5V
VO+
OFF ON
RUN/SS
3 FCB
IOSTEP
5V-20V
0.6V-5V/10A
(VOS RTN)
COMP
1 2
3.3V
1
1
1.2V
2
1
12 2
1.5V
21
2
2.5V 5V1.8V
VOUT SEL
2
DC823B-A
Thursday, October 06, 2005
11
Custom
SCH, LTM4600EV HIGH EFFICIENCY DC/DC MODULE
823B-1.DSNNONE
MEI 08/04/04
SIZE
SCALE:
CAGE CODE DWG NO REV
SHEET OF
FILENAME:
TITLE
CONTRACT NO.
APPROVALS DATE
DRAWN CHECKED
APPROVED
ENGINEER
DESIGNER
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - -
2 PLACES - - - 3 PLACES - - -
INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
THIRD ANGLE PROJECTION
DO NOT SCALE DRAWING
TECHNOLOGY
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: [phone]
Fax: [phone]
PROD1 05/27/05
REVISION HISTORY
DESCRIPTION DATE APPROVEDECO REV
VIN
VOUT
RUN
EXTVCC SVIN
PWRGD
FADJ VOSET
VOUT
COMP FCB
VIN
VIN
C17 OPT
1 2
R13 OPT
1 2
C18 OPT
1 2
R14
100K
12
TP13
TP10
J2
TP14 TP6
C4 OPT
12
JP1
R11 0.01
C15 1uF
1 2
TP1
TP7
JP0
R12 10K
1 2
TP11
J3
TP9
R1
49.9K
12
J4
TP8
R8 0
1 2
U1
LTM4600EV
B1
D1
F1
A3
A5
A7
A9
A11
A13
C10
C12
C14
E14
E12
E10
D23
G1
H9
H11
H13
H15
H17
J1
K7
K9
K11
K13
K15
K17
L2
L4
L6
L8
L10
L12
L14
L16
L18
L20
L22
M2
M4
M6
M10
M12
M14
M16
M18
M20
M22
N2
M8
N4
N6
N8
N10
N12 N14 N16 N18 N20 N22
H7
P22 P20 P18 P16 P14 P12 P10 P8 P6 P4 P2 R22 R20
R18
R16
R14
R12
R10
R8
R6
R4
R2
T22
T20
T18
T16
T14
T12
T10
T6
T4
T2
T8
A19 A17 A15 A21 B23
G23
J23
F23
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
SGND PGND PGND PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND
PGND PGND PGND PGND PGND PGND
PGND
VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
EXTVCC
SVIN FADJ VOSET COMP FCB PGOOD
RUN/SS
C13
100pF
C16 1uF
1 2
C12 100pF
12
TP2
C7 100uF
12
C11 OPT
1 2
+
C1 150uF
12
C5 10uF
12
R2
66.5K
12
R3
31.6K
1 2
JP4
C2 10uF
12
TP4
TP12
R9 1M
1 2
C3 OPT
12
R4
22.1K
1 2
C8 OPT
12
J5
1
2
3
4
5
R6 10K
1 2
C14 OPT
1 2
C6 100uF
12
R10 10K
1 2
D1 4.7V
1 3
C19 OPT
1 2
J6
1
2
3
4
5
JP6
JP2
Q14
1
23
JP3
J1
TP5
C10 22uF 6.3V
12
JP7
TP3
JP5
R7 5.1K
1 2
R5
13.7K
1 2
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DEMO MANUAL DC823B-A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2011
LT 0111 • 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 applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation
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