Linear Technology LTM8003 Quick setup guide

1
dc2416afa
DEMO MANUAL DC2416A
Description
LTM8003
40VIN, 3.5A Step-Down
μModule Regulator
Demonstration circuit 2416A features the LT M
®
8003, a
40V, 3.5A step-down μModule
®
Regulator. This demo
circuit is configured to deliver a 5.0V output from an input
voltage between 6.0V to 40V at a switching frequency
of 2MHz. The wide input range of the LTM8003 allows
a variety of input sources such as automotive batteries
and industrial supplies. Under light load conditions, the
available Burst Mode
®
operation supports high efficiency
with low output ripple.
L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and Burst Mode are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
performance summary
BoarD photo
The demo board has an EMI filter installed. The EMI per-
formance of the board is shown in Figure 3.
The LTM8003 data sheet gives complete description of
the device, operation and application information. The data
sheet must be read in conjunction with this demo manual
prior to working on or modifying demo circuit 2416A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2416A
Specifications are at TA= 25°C
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
VIN Input Supply Range 6 40 V
VOUT Output Voltage 4.75 5 5.25 V
IOUT Output Current VIN = 12V 3.5 A
fSW Switching Frequency VIN = 12V, IOUT = 3.5A 2 MHz
VOUT(AC) Output Ripple VIN = 12V, IOUT = 3.5A 20 mV
ηEfficiency VIN = 12V, IOUT = 3.5A 91.6 %
Downloaded from Arrow.com.

2
dc2416afa
DEMO MANUAL DC2416A
Quick start proceDure
DC2416A is an easy way to evaluate the performance of
the LTM8003. Refer to Figure 1 for proper measurement
equipment setup and follow the procedure below:
NOTE: When measuring the input or output voltage ripple,
care must be taken to avoid a long ground lead on the
oscilloscope probe. Measure the input or output voltage
ripple by touching the probe tip directly across the VIN or
VOUT and GND terminals. See Figure 2 for proper scope
probe technique.
1. Place JP1 in Burst position.
2. With power off, connect the input power supply to
VEMI and GND.
3. Turn on the power at the input.
NOTE:Make sure that the input voltage does not exceed
40V.
4. Check for the proper output voltage between VOUT and
GND (VOUT = 5V).
NOTE:If there is no output, temporarily disconnect the
load to make sure that the load is not set too high.
5. Once the proper output voltage is established, adjust
the load within the operating range and measure the
output voltage regulation, ripple voltage, efficiency and
other parameters.
6. An external clock can be added to the SYNC terminal
when SYNC function is used (JP1 on the SYNC posi-
tion). Make sure that R1 be chosen to set the switching
frequency equal toor below thelowest SYNC frequency.
JP1 can also set the regulator in pulse-skipping mode
(FloatingJP1)or spread spectrum mode (JP1 on SYNC,
and set it high between 3.2V and 4.2V).
Downloaded from Arrow.com.Downloaded from Arrow.com.

3
dc2416afa
DEMO MANUAL DC2416A
Figure 1. DC2416A Proper Equipment Setup
V
IN
OR V
OUT
GND
Quick start proceDure
Figure 2. Measuring Input or Output Ripple
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

4
dc2416afa
DEMO MANUAL DC2416A
Quick start proceDure
AMPLITUDE (dBµV/m)
40
50
45
35
30
25
20
15
10
–15
–10
–5
5
0
FREQUENCY (MHz)
30 130 230 330 530430 630 730 830 930
DC2416A F03a
CLASS 5 AVG
WITH SS, AV H
AMPLITUDE (dBµV/m)
40
50
45
35
30
25
20
15
10
–15
–10
–5
5
0
FREQUENCY (MHz)
30 130 230 330 530430 630 730 830 930
DC2416A F03b
CLASS 5 AVG
WITH SS, AV V
AMPLITUDE (dBµV/m)
40
50
45
35
30
25
20
15
10
–15
–10
–5
5
0
FREQUENCY (MHz)
30 130 230 330 530430 630 730 830 930
DC2416A F03c
CLASS 5 PEAK
DATA
AMPLITUDE (dBµV/m)
40
50
45
35
30
25
20
15
10
–15
–10
–5
5
0
FREQUENCY (MHz)
30 130 230 330 530430 630 730 830 930
DC2416A F03d
CLASS 5 PEAK
DATA
Figure 3. DC2416A EMI Performance in CISPR25 Radiated Emission
Test with and without Spread Spectrum (14VIN, IOUT = 3.5A)
(3a) Horizontal Polarization, Average, with Spread Spectrum (3b) Vertical Polarization, Average, with Spread Spectrum
(3c) Horizontal Polarization, Peak, without Spread Spectrum (3d) Vertical Polarization, Peak, without Spread Spectrum
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

5
dc2416afa
DEMO MANUAL DC2416A
Quick start proceDure
LOAD CURRENT (A)
1
EFFICIENCY (%)
84
88
94
3.5
DC2416A F05
82
86
90
92
80 2
1.50.5 2.5 3
VIN = 12V
VIN = 24V
Figure 4. DC2416A Thermal Performance (12VIN, IOUT = 3.5A, TA= 25°C)
(4a) VIN = 12V (4b) VIN = 24V
Figure 5. DC2416A Efficiency
vs Load Current (TA= 25°C)
Figure 6. Output Noise Spectrum
with 3.5A Load Current (VIN = 12V)
FREQUENCY (MHz)
0.5
INTENSITY (dBm)
–80
–40
0
5
DC2416A F06
–100
–60
–20
–120 2
10 2.5 3.51.5 3 4.54
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

6
dc2416afa
DEMO MANUAL DC2416A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 C1 CAP., CER., X7R, 0.1µF, 25V, 10% 0603 MURATA, GRM188R71E104KA01D
2 1 C3 CAP., ALUM., 56µF, 50V SUN ELECTRONIC INDUSTRIES CORP., 50HVT56M
3 2 C4, C8 CAP., CER., X7R, 10µF, 50V, 10% 1210 MURATA, GRM32ER71H106KA12L
4 1 C5 CAP., CER., X7S, 100µF, 6.3V, 20% 1210 MURATA, GRM32EC70J107ME15L
5 1 C6 CAP., CER., X7R, 1µF, 10V, 10%, 0603 MURATA, GRM188R71A105KA61D
6 1 C7 CAP., CER., X7R, 4.7µF, 50V, 20% 1206 MURATA, GRM31CR71H475KA12L
7 1 C10 CAP., CER., X7R, 0.1µF, 50V, 10% 0402 TDK, C1005X7R1H104K050BB
8 2 C11, C12 CAP., CER., X7R, 0.1µF, 50V, 10% 0603 AVX, 06035C104KAT2A
9 1 R1 RES., CHIP, 18.2k, 1/10W, 1% 0603 VISHAY, CRCW060318K2FKEA
10 1 R2 RES., CHIP, 0Ω, 1/10W, 1% 1206 VISHAY, CRCW12060000Z0EA
11 2 R3, R5 RES., CHIP, 100k, 1/10W, 1% 0603 VISHAY, CRCW0603100KFKEA
12 1 FB1 CHIP BEAD IND., 0805 TDK, MPZ2012S300AT000
13 1 R4 RES., CHIP, 24.3k, 1/10W, 1% 0603 VISHAY, CRCW060324K3FKEA
14 1 U1 IC., BGA, LTM8003, 48PIN LINEAR TECH., LTM8003HY#PBF
Additional Demo Board Circuit Components
1 0 C2, C9 (OPT) CAP., 0603
2 0 R6 (OPT) RES., 0603
Hardware: For Demo Board Only
1 10 E1-E10 TESTPOINT, TURRET, .094" PBF MILL-MAX, 2501-2-00-80-00-00-07-0
2 1 JP1 HEADER 3 PIN 0.079 SINGLE ROW WURTH ELEKTRONIK, 62000311121
3 1 XJP1 SHUNT, .079" CENTER WURTH ELEKTRONIK, 60800213421
4 4 MH1-MH4 STAND-OFF, NYLON 0.50" WURTH ELEKTRONIK, 702935000
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

7
dc2416afa
DEMO MANUAL DC2416A
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
1. ALL RESISTORS ARE 0603. ALL CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
VEMI
6V - 40V
TR/SS
PGOOD
VOUT
5V / 3.5A
SYNC
GND
GND GND
BURST SYNC
MODE
BIAS
RUN
VIN
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
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.
www.linear.com
3
DEMO CIRCUIT 2416A
Monday, April 11, 2016 11
N/A
LTM8003HY
40VIN, 3.5A STEP-DOWN µMODULE REGULATOR
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
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.
www.linear.com
3
DEMO CIRCUIT 2416A
Monday, April 11, 2016 11
N/A
LTM8003HY
40VIN, 3.5A STEP-DOWN µMODULE REGULATOR
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
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.
www.linear.com
3
DEMO CIRCUIT 2416A
Monday, April 11, 2016 11
N/A
LTM8003HY
40VIN, 3.5A STEP-DOWN µMODULE REGULATOR
C5
100uF
1210
E6
R4
24.3K
R1
18.2K
C4
10uF
50V 1210
C10 0.1uF 50V 0402
R6
OPT
E2
U1 LTM8003HY
RUN
B6
VIN
C6
VIN
D6
TR/SS
B3
RUN
B5
TR/SS
A3
RT
A5 RT A4
GND
A6
GND
B4
GND
C3 GND
C2
GND
C4
GND
D2
GND
D3
GND
D4
GND
D1
GND
E1
GND
E2
GND
E3
GND
E4
NC
C5
NC
E5
GND
F6
GND
F3
GND
F4
GND
F5
SYNC A2
BIAS G1
BIAS G2
PG B1
FB F1
SYNC B2
NC
E6
NC
D5
VOUT G3 VOUT G4 VOUT G5 VOUT G6 VOUT H1 VOUT H2 VOUT H3 VOUT H4 VOUT H5 VOUT H6
PG C1
FB F2
GND
A1
C11 0.1uF 50V
E1
C7 4.7uF
1206
50V
E7
C6
1uF 10V
C12 0.1uF 50V
JP1
1
2
3
E8
E3
R2
0
1206 C9
OPT
R3 100K
C8 10uF
1210
50V
E9
E10
R5 100K
+
C3 56uF 50V 50HVT56M E4
C1
0.1uF C2
OPT
FB1
MPZ2012S300A
E5
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.

8
dc2416afa
DEMO MANUAL DC2416A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2016
LT 0616 REV A • 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
Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.Downloaded from Arrow.com.