DEMO MANUAL DC823B-A
LTM4600:
20V, 10A Step-Down Power
µModule
®
Regulator
DESCRIPTION
Demonstration circuit DC823B-A features the
LTM
®
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 V
IN
, V
OUT
, and thermal conditions.
Integrated input and output filters enable a simple PCB
layout. Only bulk input and output capacitors are needed.
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
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
PARAMETER
Input Voltage Range
Output Voltage V
OUT
Maximum Continuous Output Current
Efficiency
(T
A
= 25°C)
VALUE
4.5V to 20V
1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V
10 A
DC
82%, See Figure 2
TEST CONDITION
Selectable with Jumpers (Open for 0.6V)
5V to 20V
IN
, 1.5V
OUT
V
IN
= 12V, V
OUT
= 1.5V, I
OUT
= 10A
BOARD PHOTO
dc823baf
1
DEMO MANUAL DC823B-A
QUICK START PROCEDURE
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
1.5V
OUT
application:
FCB
CCM
RUN/SS
ON
V
OUT
Select
1.5V
3. Turn on the power at the input. The output voltage
should be 1.5V ± 2%.
4. Once the proper output voltage is established, adjust the
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).
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 V
IN
supply to be less
than 20V. The optional 5V bias supply applied to the
EXTVCC pin must be off while the main V
IN
is turned off.
+
+
–
A
V
LOAD
–
–
0A TO 10A
+
–
+
–
A
–
V
+
+
+
–
dc823ba FO1
Figure 1. Test Set-Up of DC823B-A (EXTVCC V
BIAS
Supply is Optional)
dc823baf
2
DEMO MANUAL DC823B-A
QUICK START PROCEDURE
Efficiency vs Load Current with
5V
IN
(FCB = 0)
100
90
80
EFFICIENCY (%)
70
60
50
40
30
0.6V
OUT
1.2V
OUT
1.5V
OUT
2.5V
OUT
0
2
4
6
8
LOAD CURRENT (A)
10
12
dc823bb F02a
Efficiency vs Load Current with
12V
IN
(FCB = 0)
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
0.6V
OUT
1.2V
OUT
1.5V
OUT
2.5V
OUT
3.3V
OUT
0
2
4
6
8
LOAD CURRENT (A)
10
12
dc823bb F02b
Figure 2. Measured Supply Efficiencies with Different V
IN
and V
OUT
I
OUT
(5A/DIV)
C
OUT
= 2 × 100µF/X5R/1210
332mV
P-P
V
OUT
(200mV/DIV)
V
IN
= 12V
V
OUT
= 1.5V
FCB = 0
0A TO 10A LOAD STEP
dc823ba F03
Figure 3. Measured Load Transient Response (0A to 10A Step)
dc823baf
3
DEMO MANUAL DC823B-A
PARTS LIST
ITEM
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
10
11
12
13
QTY
1
2
2
1
1
1
1
1
0
0
0
1
2
0
1
1
1
1
1
1
3
REFERENCE
C1
C5, C2
C7, C8
C10
C12
R1
R8
U1
C4, C3
C8
C11, C14, C18,
C19
C13
C15, C16
C17
D1
Q14
R2
R3
R4
R5
R6, R10, R12
PART DESCRIPTION
CAP 150µF 20% 35V ALUM
,
CAP 1206 10µF 20% 25V X5R
,
CAP 1812 100µF 20% 6.3V X5R
,
CAP 1206 22µF 20% 6.3V X5R
,
CAP 0603 100pF 10% 50V X7R
,
RES, 0603 49.9k 1% 1/10W
RES, 0603 0Ω JUMPER
IC, LTM4600EV
CAP 1206 OPTION
,
CAP 1812 OPTION
,
CAP 0603 OPTION
,
CAP 0603 100pF 10% 50V NPO
,
CAP 0603 1µF 20% 10V X5R
,
CAP 0805 1µF 20% 16V X5R OPTION
,
DIODE, ZENER 4.7V
XSTR, SUD50N03-10CP MOSFET
RES, 0603 66.5k 1% 1/10W
RES, 0603 31.6k 1% 1/10W
RES, 0603 22.1k 1% 1/10W
RES, 0603 13.7k 1% 1/10W
RES, 0603 10k 5% 1/10W
MANUFACTURER/PART NUMBER
SANYO 35MV150WXV (now SUNCON 35ME150WXV)
TDK C3216X5R1E106MT
TDK C4532X5R0J107M
TAIYO YUDEN JMK316BJ226ML-T
AVX 06035C101KAT1A
AAC CR16-4992FM
VISHAY CRCW06030000Z0EA
LINEAR TECHNOLOGY LTM4600EV
TAIYO YUDEN EMK316BJ475ML-T OPTION
TAIYO YUDEN JMK432BJ107MU-T OPTION
OPTION
AVX 06035A101KAT
TAIYO YUDEN LMK107BJ105MA-T
TAIYO YUDEN EMK212BJ105MG-T
DIODES INC. BZX84C4V7-7-F
SILICONIX SUD50N03-10CP-E3
AAC CR16-6652FM
VISHAY CRCW06036652F
AAC CR16-3162FM
PANASONIC ERJ-3EKF3162V
AAC CR16-2212FM
AAC CR16-1372FM
VISHAY CRCW060310K0JNEA
PANASONIC ERJ-3GEY512V
AAC CR16-512JM
AAC CR16-105JM
IRC LRF2512-01-R010-J
OPTION
AAC CR16-1003FM
COMM CON 2802S-02G2
COMM CON 2802S-03G2
KEYSTONE 575-4
CONNEX 112404
MILL-MAX 2501-2-00-80-00-00-07-0
SAMTEC 2SN-BK-G
KEYSTONE_8831
Required Circuit Components
Additional Demo Board Circuit Components
R2 - ALTERNATE RES, 0603 66.5k 1% 1/10W
R3 - ALTERNATE RES, 0603 31.6k 1% 1/10W
R6, R10,
RES, 0603 10k 5% 1/10W
R12- ALTERNATE
14
15
16
17
18
Hardware
1
2
3
4
5
6
7
6
2
4
2
14
3
4
JP0 TO JP5
JP6, JP7
J1, J2, J3, J4
J5, J6
TP1 TO TP14
JP3, JP6, JP7
HEADER, 2-PIN, 2mm
HEADER, 3-PIN, 2mm
JACK, BANANA
CONN, BNC, 5 PINS
TURRET
SHUNT
STANDOFF SNAP ON
,
1
1
1
0
1
R7
R9
R11
R13
R14
RES, 0603 5.1k 5% 1/10W
RES, 0603 1MΩ 5% 1/16W
RES, 2512 0.01Ω 5% 1W
RES, 0603 OPTION
RES, 0603 100k 1% 1/10W
dc823baf
4
REVISION HISTORY
ECO
1
PROD
05/27/05
REV
DESCRIPTION
DATE
APPROVED
VIN+
TP1
J1
VIN
1
C5
10uF
2
2
2
2
C15
1uF
1
1
1
3
2
J5
1
1
R10
10K
1
R11
0.01
1uF
C16
Q14
TP13
VIN
1
1
+
C1
C4
C3
1
5V-20V
1
C2
150uF
OPT
OPT
10uF
2
2
2
GND
J2
TP2
VIN-
B1
D1
F1
A3
A5
A7
A9
A11
A13
C10
C12
C14
E14
E12
E10
T2
T4
T6
T8
T10
T12
T14
T16
T18
T20
T22
R2
R4
R6
R8
R10
R12
R14
R16
R18
C19 OPT
1
2
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VIN
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
5
4
3
2
A19
EXTVCC
SVIN
FADJ
VOSET
COMP
FCB
PGOOD
A17
A15
A21
B23
G23
J23
C12 100pF
2
RUN/SS
R13 OPT
1
2
C14
OPT
1
F23
2
VIN
2
1
U1
LTM4600EV
2
IOSTEP
CLK
J6
C11 OPT
1
2
C17 OPT
1
2
IOSTEP
VO+
2
3
4
5
SCHEMATIC DIAGRAM
EXTVCC
TP10
EXTVCC
SVIN
TP12
SVIN
FADJ
TP11
TP4
J4
VOUT
1
1
1
C6
C7
100uF
2
2
C8
100uF
2
OPT
2
1
FADJ
VO+
VOUT
C10
0.6V-5V/10A
22uF
6.3V
J3
VOSET
TP9
VOSET
COMP
TP14
COMP
FCB
TP6
FCB
PWRGD
TP5
PWRGD
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
R20
R22
P2
P4
P6
P8
P10
P12
P14
P16
P18
P20
P22
GND
TP3
RUN
TP7
VIN
VOUT
VO-
RUN/SS
2
R7
5.1K
R12
10K
1
1
2
VOUT SEL
3
2
D23
G1
H7
H9
H11
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
N22
N20
N18
N16
N14
N12
R9
1M
D1
4.7V
R6
10K
1
ON
1
OFF
RUN/SS
JP7 3
2
1
1
2
C18
OPT
1
1
1
2
2
DCM
2
R8
0
1
R1
49.9K
1
R3
31.6K
R4
22.1K
R5
13.7K
FCB
JP6
3
2
2
R14
100K
R2
66.5K
CCM
2
1
1
1
1 C13
2
(VOS RTN)
100pF
SGND
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.
H13
H15
H17
J1
K7
K9
K11
K13
K15
K17
L2
L4
L6
L8
L10
L12
L14
L16
L18
L20
L22
M2
M4
M6
M8
M10
M12
M14
M16
M18
M20
M22
N2
N4
N6
N8
N10
1
JP2
2
1.8V
2
JP3
1
2.5V
2
JP4
1
3.3V
2
JP5
1
5V
1
JP0
2
1.2V
1
JP1
2
1.5V
TP8
JUMPER
VOUT
JP0
1.2V
CONTRACT NO.
APPROVALS
DRAWN MEI
THIRD ANGLE PROJECTION
CHECKED
APPROVED
ENGINEER
DESIGNER
1630 McCarthy Blvd.
Milpitas, CA 95035
Phone: (408)432-1900
Fax: (408)434-0507
JP1
1.5V
2
JP2
1.8V
DATE
08/04/04
UNLESS OTHERWISE SPECIFIED
DIMENSIONS ARE IN INCHES
TOLERANCE ON ANGLE - - -
2 PLACES - - - 3 PLACES - - -
INTERPRET DIM AND TOL
PER ASME Y14.5M -1994
TECHNOLOGY
TITLE
JP3
2.5V
SCH, LTM4600EV HIGH EFFICIENCY DC/DC MODULE
SIZE
Custom
DO NOT SCALE DRAWING
Thursday, October 06, 2005
JP4
3.3V
CAGE CODE
DWG NO
DC823B-A
SCALE: NONE
FILENAME: 823B-1.DSN
SHEET
1
OF
JP5
5V
REV
2
1
DEMO MANUAL DC823B-A
dc823baf
5
京公网安备 11010802033920号
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved
电子工程世界
