DEMO MANUAL DC2164A-B
LTM4630EY-1
High Efficiency, PolyPhase 105A
Step-Down Power µModule™ Regulator
Description
Demonstration Circuit 2164A-B features a PolyPhase
®
design using the
LTM
®
4630EY-1
(A-grade), the high ef-
ficiency, high density, dual 18A, switch mode step-down
power module regulator. The input voltage is from 4.5V
to 15V. The output voltage is jumper selectable from 0.9V
to 1.8V. DC2164A-B can deliver nominal 105A output
current. As explained in the data sheet, output current
derating is necessary for certain V
IN
, V
OUT
, and thermal
conditions. The LTM4630-1A on DC2164A-B always
operate in continuous conduction mode. The switching
frequency can be programmed through a resistor or can
be synchronized to an external clock signal. The board
allows the user to program how its output voltage ramps
up and down through the TRACK pin. The output voltage
is tightly regulated between V
O+
and V
O–
through remote
output voltage sensing which improves output voltage
regulation at heavy loads. The LTM4630-1A has ±0.8%
total DC errors. These features and the availability of the
LTM4630EY-1 in a compact 16mm × 16mm × 5.01mm
BGA package make it ideal for use in many high-density
point-of-load regulation applications. The LTM4630-1 data
sheet must be read in conjunction with this demo manual
for working on or modifying the demo circuit DC2164A-B.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2164A-B
L,
LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
Figure 1. 105A PolyPhase LTM4630-1/DC2164A-B Demo Board
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DEMO MANUAL DC2164A-B
performance summary
PARAMETER
Input Voltage Range
Output Voltage V
OUT
Maximum Continuous Output Current
Default Operating Frequency
Resistor Programmable Frequency Range
External Clock Sync. Frequency Range
Efficiency
Load Transient
V
IN
= 12V, V
OUT
= 1V, I
OUT
= 105A, f
SW
= 400kHz
V
IN
= 12V, V
OUT
= 1V, I
STEP
= 0A ~ 26.25A
400
400
83.8
(See Figure 3)
<53.1
(See Figure 4)
V
IN
= 4.5 ~ 15V, I
OUT
= 0A ~ 105A, JP5: 1V
Derating Is Necessary for Certain V
IN
, V
OUT
and Thermal
Conditions, See Data Sheet for Detail
CONDITIONS
Specifications are at T
A
= 25°C
MIN
4.5
1 ±0.8%
(0.992 ~ 1.008)
105
400
780
780
TYP
MAX
15
UNITS
V
V
A
kHz
kHz
kHz
%
mV
Quick start proceDure
Demonstration circuit 2164A-B is easy to set up to
evaluate the performance of PolyPhase operation of the
LTM4630EY-1. Due to the high input/output current, user
should select the proper input supply/load/cable which
can sustain the full load operation. It’s recommended to
pull load current from J2 and J4. The load current pulled
from J5 and J6 shouldn’t exceed 18A. Please refer to
Figure 2 for proper measurement setup and follow the
procedure below:
1. Place jumpers in the following positions for a typical
1V
OUT
application:
JP1
CLK
INT
JP2
RUN
OFF
JP4 ~ JP8
VOUT SELECT
ON JP5/1.0V
and other parameters. Output voltage ripple should
be measured at J7 with BNC cables. 50Ω termination
should be set on the oscilloscope or BNC cables.
5. (Optional) For optional load transient test, apply an
adjustable pulse signal between IOSTEP CLK and GND
test point. Pulse amplitude (3V ~ 3.5V) sets the load
step current amplitude. The output transient current can
be monitored at the BNC connector J8 (5mV/A). The
pulse signal should be very small duty cycle (<10%)
to limit the thermal stress on the transient load circuit.
6. (Optional) LTM4630-1 can be synchronized to an
external clock signal. Place the JP1 jumper on EXT
and apply a clock signal (0V ~ 5V, square wave) on
the EXT_CLK test point.
7. (Optional) The outputs of LTM4630-1 can track another
supply. The output voltage tracks the voltage on TRACK
when a valid signal is applied on the test point.
8. (Optional) DC2164A-B can be configured to a dual
outputs configuration with V
O
at 87A load current and
V
O2
at 18A load current. Stuff 0Ω resistor on R61 and
0.1µF on C14. Remove R22, R23, R24, R26, R27, R28,
R32, R33, R35. Output voltage V
O2
is set by R37 based
on the equation V
O2
= 0.6V(1 + 60.4k/R37).
2. With power off, connect the input power supply, load
and meters as shown in Figure 2. Preset the load to 0A
and V
IN
supply to 12V.
3. Turn on the power supply at the input. Place JP2 to
ON position. The output voltage between V
O+
and V
O–
should be 1V ±0.8% (0.992V ~ 1.008V).
4. Once the proper output voltage is established, adjust the
load within the operating range and observe the output
voltage regulation, output voltage ripple, efficiency
2
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DEMO MANUAL DC2164A-B
Quick start proceDure
Figure 2. Test Setup of DC2164A-B
100
90
EFFICIENCY (%)
80
70
60
V
O
= 0.9V
V
O
= 1.0V
V
O
= 1.2V
V
O
= 1.5V
V
O
= 1.8V
0
20
40
60
80
LOAD CURRENT (A)
100
dn2164ab F03
Figure 3. Measured Efficiency V
IN
= 12V, f
SW
= 400kHz
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DEMO MANUAL DC2164A-B
Quick start proceDure
0A TO 26.25A LOAD
1V OUTPUT (20MHz BW) [50mV/DIV]
dn2164ab F04
Figure 4. Load Transient 0A to 26.25A (V
IN
= 12V, V
OUT
= 1V)
Figure 5. Thermal Capture at 12V
IN
, 1V
OUT
, 105A
(T
A
= 25°C, 400 LFM Airflow and No Heat Sink)
parts List
ITEM
1
2
3
4
QTY
1
2
12
18
REFERENCE
CIN1
CIN2, CIN11
CIN3-CIN10, CIN12-CIN15
CO1, CO2, CO5, CO6, CO7, CO8, CO11, CO13,
CO15, CO16, CO56, CO57, CO20, CO21, CO26,
CO27, CO24, CO58
C1
C4, C10, C18, C22
C6, C11, C19, C23, C27, C28
C7, C25
C24, C31
Q1, Q2
R1, R3, R25, R29
R2, R14, R21, R39, R47
R4, R36, R41, R54
R9, R31, R43, R51
R11
R15
R16
R17
R18
R56, R57
U1, U2, U3
PART DESCRIPTION
CAP, 150µF 25% 25V ALUM
CAP, 1206 1µF 10% 25V X5R
CAP, 1210 22µF 10% 25V X5R
CAP, 1206 220µF 20% 4V X5R
MANUFACTURER/PART NUMBER
SUN ELECT., 25CE150AX
TAIYO YUDEN, TMK316BJ105KL-T
AVX, 12103D226KAT2A
MURATA, GRM31CR60G227ME11L
Required Circuit Components
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
1
4
6
2
2
2
4
5
4
4
1
1
1
1
1
2
3
CAP, 0603 330pF 10% 50V NPO
CAP, 0603 2.2µF 20% 10V X5R
CAP, 0603 1µF 10% 10V X7R
CAP, 0603 0.1µF 10% 25V X7R
CAP, 0603 0.01µF 10% 100V X7R
MOSFET, N-CH D-S 30V TO252
RES, 0603 10Ω 5% 1/10W
RES, 0603 121k 1% 1/10W
RES, 0603 10k 5% 1/10W
RES, 0603 100k 1% 1/10W
RES, 0603 2.32k 1% 1/10W
RES, 0603 90.9k 1% 1/10W
RES, 0603 60.4k 1% 1/10W
RES, 0603 40.2k 1% 1/10W
RES, 0603 30.1k 1% 1/10W
RES, 2512 0.010Ω 1% 1W
IC, VOLTAGE REGULATOR, BGA
AVX, 06035A331KAT2A
TAIYO YUDEN, LMK107BJ225MA-T
TAIYO YUDEN, LMK107BJ105KA-T
AVX, 06033C104KAT2A
AVX, 06031C103KAT2A
VISHAY, SUD50N04-8M8P-4GE3
VISHAY, CRCW060310R0JNEA
VISHAY, CRCW0603121KFKEA
VISHAY, CRCW060310K0JNEA
VISHAY, CRCW0603100KFKEA
VISHAY, CRCW06032K32FKEA
VISHAY, CRCW060390K9FKEA
VISHAY, CRCW060360K4FKEA
VISHAY, CRCW060340K2FKEA
VISHAY, CRCW060330K1FKEA
VISHAY, WSL2512R01000FEA
LINEAR TECH., LTM4630IY-1A#PBF
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DEMO MANUAL DC2164A-B
parts List
ITEM
1
2
QTY
0
0
REFERENCE
CIN16-CIN19
CO3, CO9, CO14, CO17, CO18, CO22, CO28,
CO30, CO32-CO36, CO38, CO40, CO42, CO45,
CO46, CO48, CO50, CO52, CO54, CO55, CO59
CO4, CO10, CO12, CO19, CO23, CO25, CO29,
CO31, CO37, CO39, CO41, CO43, CO44, CO47,
CO49, CO51, CO53
C2, C3, C5, C8, C9, C12-, C17, C20, C21, C26,
C29, C30, C32
R5, R7, R8, R10, R30, R37, R38, R42, R44,
R48-R50, R52, R53, R55, R61, R64
R6, R13, R19, R20, R27, R28, R32-R35, R40,
R45, R62, R63
R22, R23, R24, R26
R58, R59
R60
U4
E1-E4, E6-E9, E12, E13, E22
E19, E20
JP1, JP2
JP4, JP5, JP6, JP7, JP8
J1, J2, J3, J4
J1, J2, J3, J4 (x2)
J1, J2, J3, J4
J1, J2, J3, J4
J5, J6
J7, J8
XJP1, XJP2, XJP4
PART DESCRIPTION
DO NOT STUFF
CAP, 1210 OPTION
OPTION
MANUFACTURER/PART NUMBER
Additional Demo Board Circuit Components
3
0
CAP, 7343 OPTION
OPTION
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
0
0
14
4
0
1
0
11
2
2
5
4
8
4
4
2
2
3
CAP, 0603 OPTION
RES, 0603 OPTION
RES, 0603 0Ω JUMPER
RES, 2010 0Ω JUMPER
RES, 2512 OPTION
RES, 1206 0Ω JUMPER
DO NOT STUFF
TESTPOINT, TURRET, 0.063"
TESTPOINT, TURRET, 0.094"
HEADER, 3 PIN 0.079 SINGLE ROW
HEADER, 2 PIN 0.079 SINGLE ROW
STUD, TEST PIN
NUT, BRASS PL #10-32
LUG RING, #10
WASHER, TIN PLATED BRASS
JACK, BANANA
CON, BNC, 5 PINS
SHUNT
OPTION
OPTION
VISHAY, CRCW06030000Z0EA
VISHAY, CRCW20100000ZEA9
OPTION
VISHAY, CRCW12060000ZOEA
Hardware: For Demo Board Only
MILL MAX, 2308-2-00-80-00-00-07-0
MILL MAX, 2501-2-00-80-00-00-07-0
SULLINS, NRPN031PAEN-RC
SAMTEC, TMM-102-02-L-S
PEM, KFH-032-10
ANY, 10-32M/S BR PL
KEYSTONE, 8205
ANY, #10EXT BZ TN
KEYSTONE, 575-4
CONNEX, 112404
SAMTEC, 2SN-BK-G
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