Linear Technology DC2147A Quick setup guide

1
dc2147af
DEMO MANUAL DC2147A
Description
LTM4631
Ultrathin Dual 10A or Single 20A
DC/DC µModule Regulator
Demonstration circuit 2147A features the LT M
®
4631,
the high efficiency, high density, dual 10A, switch mode
step-down µModule
®
power module regulator. The input
voltage is from 4.5V to 15V. The output voltage is pro-
grammable from 0.6V to 1.8V. DC2147A can deliver up to
10A maximum in each channel. As explained in the data
sheet, output current derating is necessary for certain
VIN, VOUT, and thermal conditions. The board operates in
continuous conduction mode in heavy load conditions.
For high efficiency at low load currents, the MODE jumper
(JP1) selects pulse-skipping mode for noise sensitive ap-
plications or Burst Mode
®
operation in less noise sensitive
applications. Two outputs can be connected in parallel for
a single 20A output solution with optional jumper resis-
tors. The board allows the user to program how its output
L, LT, LTC, LTM, Linear Technology, Burst Mode, µModule and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
ramps up and down through the TRACK/SS pin. The output
can be set up to either coincidentally or ratio-metrically
track with another supply’s output. Remote output voltage
sensing is available for improved output voltage regula-
tion at the load point. These features and the availability
of the LTM4631 in a compact 16mm × 16mm × 1.91mm
LGA package make it ideal for use in many high density
point-of-load regulation applications. The LTM4631 data
sheet must be read in conjunction with this demo manual
for working on or modifying the demo circuit DC2147A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2147A
BoarD photo
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2
dc2147af
DEMO MANUAL DC2147A
Quick start proceDure
Demonstration circuit 2147A is easy to set up to evalu-
ate the performance of the LTM4631EV. Please refer to
Figure 1 for proper measurement setup and follow the
procedure below:
1. Place jumpers in the following positions for a typi-
cal application:
JP1 JP2 JP3 JP4 JP5 JP6
MODE RUN1 RUN2 TRACK1
SELECT
TRACK2
SELECT
CLKOUT
PHASE
CCM ON ON SOFT-
START
SOFT-
START
90°
2. With power off, connect the input power supply, load
and meters as shown in Figure 1. Preset the load to
0A and VIN supply to 12V.
3. Turn on the power supply at the input. The output
voltage in channel 1 should be 1.2V ± 1.5% (1.182V
~ 1.218V) and the output voltage in channel 2 should
be 1V ± 1.5% (0.985V ~ 1.015V).
4. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation, output voltage ripple, ef-
ficiency and other parameters. Output ripple should
be measured at J1 and J2 with BNC cables. 50Ω
termination should be set on the oscilloscope or
BNC cables.
performance summary
Specifications are at TA= 25°C
PARAMETER CONDITIONS/NOTES VALUE
Input Voltage Range 4.5V ~ 15V
Output Voltage VOUT1 VIN = 4.5V ~ 15V, IOUT1 = 0A ~ 10A, JP1: CCM 1.2V ± 1.5% (1.182V ~ 1.218V)
Output Voltage VOUT2 VIN = 4.5V ~ 15V, IOUT2 = 0A ~ 10A, JP1: CCM 1V ± 1.5% (0.985V ~ 1.015V)
Per-Channel Maximum Continuous Output
Current
Derating Is Necessary for Certain VIN, VOUT and Thermal
Conditions, See Data Sheet for Detail.
10A
Default Operating Frequency 650kHz
Resistor Programmable Frequency Range 250kHz to 780kHz
External Clock Sync Frequency Range 400kHz to 780kHz
Efficiency of Channel 1 VIN = 12V, VOUT1 = 1.2V, IOUT1 = 10A, fSW = 650kHz 81.5% See Figure 2
Efficiency of Channel 2 VIN = 12V, VOUT2 = 1V, IOUT2 = 10A, fSW = 650kHz 78.7% See Figure 3
Load Transient of Channel 1 VIN = 12V, VOUT1 = 1.2V, ISTEP = 5A ~ 10A See Figure 4
Load Transient of Channel 2 VIN = 12V, VOUT2 = 1V, ISTEP = 5A ~ 10A See Figure 5
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dc2147af
DEMO MANUAL DC2147A
Quick start proceDure
Figure 1. Test Setup of DC2147A
5. (Optional) For optional load transient test, apply an
adjustable pulse signal between IOSTEP CLK and
GND test point. Pulse amplitude sets the load step
current amplitude. The output transient current can
be monitored at the BNC connector J3 (50mV/A).
The pulse signal should have very small duty cycle
(< 10%) to limit the thermal stress on the transient
load circuit. Switch the jumper resistors R34 or R35
(on the backside of boards) to apply load transient
on channel 1 or channel 2 correspondingly.
6. (Optional) LTM4631 can be synchronized to an exter-
nal clock signal. Place the JP1 jumper on EXT_CLK
and apply a clock signal (0V ~ 5V, square wave) on
the CLKIN test point.
7. (Optional) The outputs of LTM4631 can track another
supply.ThejumpersJP4andJP5allowchoosingsoft-
start or output tracking. If tracking external voltage
is selected, the corresponding test points, TRACK1
and TRACK2, need to be connected to a valid voltage
signal.
8. (Optional) LTM4631 can be configured for a 2-phase
single output at up to 20A on DC2147A. Install 0Ω
resistors on R14, R17, R28, R39 and remove R7,
R19. Output voltage is set by R25 based on equation
VOUT = 0.6V(1+60.4K/R25).
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dc2147af
DEMO MANUAL DC2147A
Quick start proceDure
Figure 2. Measured Efficiency on Channel 1
(VOUT1 = 1.2V, fSW = 650kHz, Channel 2 Disabled)
Figure 3. Measured Efficiency on Channel 2
(VOUT2 = 1V, fSW = 650kHz, Channel 1 Disabled)
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
85
80
70
75
65
60 6 8
dc2147a F02
10
2 4
EFFICIENCY
VIN = 12V
VOUT = 1.2V
fSW = 650kHz
OUTPUT CURRENT (A)
0
EFFICIENCY (%)
85
80
70
75
65
60 6 8
dc2147a F03
10
2 4
EFFICIENCY
VIN = 12V
VOUT = 1V
fSW = 650kHz
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5
dc2147af
DEMO MANUAL DC2147A
Quick start proceDure
Figure 4. Measured Channel 1 5A to 10A Load Transient
(VIN = 12V,VOUT1 = 1.2V)
Figure 5. Measured Channel 2 5A to 10A Load Transient
(VIN = 12V,VOUT2 = 1V)
1.2V OUTPUT [50mV/DIV]
5A TO 10A LOAD STEP [4A/DIV]
1V OUTPUT [50mV/DIV]
5A TO 10A LOAD STEP [4A/DIV]
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dc2147af
DEMO MANUAL DC2147A
Figure 6. Thermal Capture at 12VIN, 1.2VOUT1 at 10A and 1VOUT2 at 10A
(TA= 25°C, No Forced Airflow and No Heat Sink)
Figure 7. Thermal Capture at 12VIN, 1.2VOUT1 at 10A and 1VOUT2 at 10A
(TA= 25°C, 200LFM Airflow and No Heat Sink)
Quick start proceDure
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dc2147af
DEMO MANUAL DC2147A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CIN1 CAP, 150µF, 25V, ALUMINUM ELECTR SUN ELECT, 25CE150AX
2 2 CIN2, CIN3 CAP, X5R, 22µF, 25V, 20%, 1206 TDK, C3216X5R1E226M160AB
3 2 COUT1, COUT5 CAP, X5R, 100µF, 4V, 20%, 1206 TDK, C3216X5R0G107M160AB
4 2 COUT2, COUT6 CAP, 470µF, 2.5V, POSCAP, F8, 7343 SANYO, 2R5TPE470M9
5 1 C2 CAP, X7R, 1µF, 25V,10%, 0805 AVX, 08053C105KAT2A
6 2 C5, C7 CAP, X5R, 0.1µF, 25V, 10%, 0603 AVX, 06033D104KAT2A
7 2 C13, C14 CAP, X7R, 0.01µF, 50V, 10%, 0603 AVX, 06035C103KAT2A
8 2 C15, C16 CAP, X7R, 1µF, 10V,10%, 0603 AVX, 0603ZC105KAT2A
9 1 Q1 XSTR,SUD50N04-8M8P-4GE3, MOSFET, TO252 VISHAY, SUD50N04-8M8P-4GE3
10 4 R1, R3, R22, R26 RES, 10, 1%, 0603 VISHAY, CRCW060310R0FKEA
11 1 R5 RES, 121k, 1%, 0603 VISHAY,CRCW0603121KFKEA
12 5 R9, R12, R15, R18, R25 RES, 60.4k, 1%, 0603 VISHAY, CRCW060360K4FKEA
13 2 R10, R13 RES, 6.04k, 1%, 0603 VISHAY, CRCW06036K04FKEA
14 1 R19 RES, 90.9k, 1%, 0603 VISHAY, CRCW060390K9FKEA
15 3 R24, R27, R36 RES, 10k, 1%, 0603 VISHAY, CRCW060310K0FKEA
16 1 R30 RES, 154k, 1%, 0603 VISHAY,CRCW0603154KFKEA
17 1 R37 RES, 0.05Ω, 1W, 2512 VISHAY, WSL2512R0050FEA
18 1 U1 LTM4631EV#PBF, 16X16X4.41-LGA LINEAR TECHNOLOGY, LTM4631EV#PBF
Additional Demo Board Circuit Components
1 0 COUT3, COUT7 OPT, 1206 OPT
2 0 COUT4, COUT8 OPT, 7343 OPT
3 0 C1 OPT, 0805 OPT
4 0 C3, C4, C6, C8 TO C12, C17, C18 OPT, 0603 OPT
5 0 R2, R4, R6, R8, R11, R14, R16,
R17, R20, R23, R28, R31, R33,
R39, R40, R41, R42
OPT, 0603 OPT
6 4 R7, R21, R29, R32 RES, 0, 1%, 0603 VISHAY, CRCW06030000Z0EA
7 1 R34 RES, 0Ω, 0.5W, 2010 VISHAY, CRCW20100000Z0EF
8 0 R35 OPT, 2010 OPT
9 0 R38 OPT, 2512 OPT
Hardware: For Demo Board Only
1 16 E1, E3 TO E10, E12 TO E18 TESTPOINT, TURRET, 0.094" MILL-MAX, 2501-2-00-80-00-00-07-0
2 1 JP1 HEADER, 2X4 0.079 DOUBLE ROW SULLINS, NRPN042PAEN-RC
3 3 JP2, JP3, JP4 HEADER, 1X3 0.079 SINGLE ROW SULLINS, NRPN031PAEN-RC
4 1 JP5 HEADER, 2X3 0.079 DOUBLE ROW SULLINS, NRPN032PAEN-RC
5 1 JP6 HEADER, 1X4 0.079 SINGLE ROW SULLINS, NRPN041PAEN-RC
6 6 XJP1 TO XJP6 SHUNT, 0.079" CENTER SAMTEC, 2SN-BK-G
7 3 J1, J2, J3 CONN, BNC, 5 PINS CONNEX 112404
8 6 J4 TO J9 JACK BANANA KEYSTONE, 575-4
9 4 (STAND-OFF) STAND-OFF, NYLON 0.50" KEYSTONE, 8833(SNAP ON)
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8
dc2147af
DEMO MANUAL DC2147A
schematic Diagram
5
5
4
4
3
3
2
2
1
1
D D C C B B A A
VIN+
VIN-
VIN GND
4.5V - 15V
VOUT1
GND VO1+ VO1-
1.2V / 10A
1V / 10A
GND
VO2- VO2+
VOUT2
ON
TRACK1
CLKOUT
PHASE
120
90
60
o
o o
ON
EXT.
SOFT-START
TRACK1 SEL.
NOTE: UNLESS OTHERWISE SPECIFIED
1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE 0603.
m
VOUT1
VIN INTVCC
VO1+
VO1-
INTVCC
VO1- VO1+
INTVCC
INTVCC
VOUT1
VO2+
VO2-
VIN
INTVCC
DIFFP
COMP1
VFB1
DIFFN
DIFFOUT
VOUT1S
VOUT1
TRACK1
RUN1
VO2+
VOUT2
VO2-
VOUT2S RUN2
TRACK2
VFB2
COMP2
INTVCC
TEMP
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
YL.
PRODUCTION
1 01-13-16
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
YL.
PRODUCTION
1 01-13-16
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
YL.
PRODUCTION
1 01-13-16
__
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
Wednesday, January 13, 2016
12
STEP-DOWN MODULE REGULATOR
LT
YL.
N/A
LTM4631EV
DEMO CIRCUIT 2147A
HIGH EFFICIENCY, ULTRATHIN DUAL 10A
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
Wednesday, January 13, 2016
12
STEP-DOWN MODULE REGULATOR
LT
YL.
N/A
LTM4631EV
DEMO CIRCUIT 2147A
HIGH EFFICIENCY, ULTRATHIN DUAL 10A
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
Wednesday, January 13, 2016
12
STEP-DOWN MODULE REGULATOR
LT
YL.
N/A
LTM4631EV
DEMO CIRCUIT 2147A
HIGH EFFICIENCY, ULTRATHIN DUAL 10A
E4
J6
R16
OPT
J7
JP3
OFF
RUN2
13
2
E15
TEMP
E7
COUT3
OPT
1206
C10 OPT
R19
90.9K
C5
0.1uF
J4
R3
10
C18 OPT
E1
CIN2 22uF
1206 25V
COUT7
OPT
1206
+
COUT4
OPT 2.5V
C4
OPT
C3
OPT
R10 6.04K
JP1
EXT_CLK
PS
CCM
MODE
BM
1 3
2 4 65
7 8
J5
R30
154K
J8
U1
LTM4631EV
VIN J9
VIN J10
VIN J11
VIN K2
VIN K3
VIN K4
VIN K9
VIN K10
VIN K11
VIN
M2
VIN
M3
VIN
M4
VIN
M5
VIN
M6
VIN
M7
VIN
M8
VIN
M9
VIN
M10
VIN
M11
VIN L2
VIN L3
VIN L4
VIN L5
VIN L6
VIN L7
VIN L8
VIN L9
VIN
L10
VIN
L11
VIN J2
VIN J3
VIN J4
RUN1
F5
TRACK1
E5
VOUTS1
C5
VOUT1
A1
VOUT1
A2
VOUT1
A3
VOUT1
A4
VOUT1
A5
VFB1
D5
SW1
G2
PGOOD1
G9
COMP1
E6
DIFFOUT
F8
DIFFN
E9
DIFFP
E8
FSET
C6
PHASMD
G4
GND
A6
GND
A7
GND
B6
GND
B7
GND
D1
GND
D2
GND
D3
GND
D4
GND
D9
GND
D10
GND
D11
GND
D12
GND
E1
GND
E2
GND
E3
GND
E4
GND
E10
GND
E11
GND
E12
GND
F1
GND
F2
GND
F3
GND
F10
GND
F11
GND
F12
GND
G1
GND
G10
GND
G12
GND
H1
GND
H2
GND H3 GND H4 GND H5 GND H6 GND H7 GND H9 GND H10 GND H11 GND H12 GND J1 GND J5 GND J8 GND J12 GND K1 GND K5 GND K6 GND K7 GND K8 GND K12 GND L1 GND L12 GND M1 GND M12
SGND C7 SGND D6 SGND F6 SGND F7 SGND G6 SGND G7
VOUT1
B1
VOUT1
B2
VOUT1
B3
VOUT1
B4
VOUT1
B5
VOUT1
C1
VOUT1
C2
VOUT1
C3
VOUT1
C4
COMP2 E7
PGOOD2 G8
SW2 G11
VFB2 D7
TRACK2 D8
RUN2 F9
VOUTS2 C8
TEMP J6
MODE-PLLIN F4
CLKOUT G5
INTVCC H8
EXTVCC J7
VOUT2 A8
VOUT2 A9
VOUT2 A10
VOUT2 A11
VOUT2 A12
VOUT2 B8
VOUT2 B9
VOUT2 B10
VOUT2 B11
VOUT2 B12
VOUT2 C9
VOUT2 C10
VOUT2 C11
VOUT2 C12
GND
G3
+
COUT2
470uF 2.5V
C7
0.1uF
E12 PGOOD2
E13
EXTVCC
R15
60.4K
R32
0
R1 10
C6
OPT
R41 OPT
E6 R21
0
COUT1
100uF
6.3V
1206
E14
CLKOUT
R7 0
C1
OPT
0805
R22 10
J9
C2
1uF
0805
R20
OPT
E8
R2
OPT
R6 OPT
R24
10K
C12
OPT
JP5 TRACK2 SEL.
VOUT1
1 3
2 4
5 6
R27
10K
+
COUT8
OPT 2.5V
CIN3 22uF
25V
1206
JP2
OFF
RUN1
1 3
2
R5
121K
R8
OPT
C11
OPT
JP6
1 3 2
4
R18 60.4K
E10 TRACK2
R9
60.4K
+
COUT6
470uF 2.5V
+
CIN1
150uF 25V
E9
TP1
SW1
R12
60.4K
C8
OPT
E3
PGOOD1
C9
OPT
R26
10
JP4
SOFT-START
TRACK
1
3
2
E5
COUT5
100uF
4V 1206
R42 OPT
R13
6.04K
C17 OPT
E16
CLKIN
R29
0
TP2 SW2
R25
60.4K
R4
OPT
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9
dc2147af
DEMO MANUAL DC2147A
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
OPTIONAL JUMPER FOR 1 OUTPUT CONFIGURATION
DIFF SENSING SELECTION
VOUT1
m
LOAD TRANSIENT CIRCUIT
VOUT2
TEMP INTVCC
RUN1 RUN2
TRACK1 TRACK2
VFB1 VFB2
COMP1 COMP2
VO2- DIFFN VO2+ DIFFP
VOUT1S VOUT1 VOUT2S DIFFOUT
VOUT1 VOUT2
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
Wednesday, January 13, 2016
22
STEP-DOWN MODULE REGULATOR
LT
YL.
N/A
LTM4631EV
DEMO CIRCUIT 2147A
HIGH EFFICIENCY, ULTRATHIN DUAL 10A
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
Wednesday, January 13, 2016
22
STEP-DOWN MODULE REGULATOR
LT
YL.
N/A
LTM4631EV
DEMO CIRCUIT 2147A
HIGH EFFICIENCY, ULTRATHIN DUAL 10A
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
Wednesday, January 13, 2016
22
STEP-DOWN MODULE REGULATOR
LT
YL.
N/A
LTM4631EV
DEMO CIRCUIT 2147A
HIGH EFFICIENCY, ULTRATHIN DUAL 10A
E17
IOSTEP CLK
R36 10K
R39
OPT
R23
OPT
J3
IOSTEP
Q1 SUD50N04-8M8P
2
1
34
R35 OPT 2010
C13
0.01uF
R14
OPT
J1
R11
OPT
C14
0.01uF
E18
GND
R34
0 OHm
0.5W
2010
R28
OPT
R38
OPT
2512
R33
OPT
R40
OPT
C16
1uF
R17
OPT
R37 0.05 1W
2512
J2
R31
OPT
C15
1uF
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10
dc2147af
DEMO MANUAL DC2147A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0616 • 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
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