Linear Technology LTM8027 Quick setup guide

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dc1307bf
DEMO MANUAL DC1307B
Description
LTM8027:
60V, 4A DC/DC
µModule
®
Regulator
Demonstration circuit 1307B features the LTM
®
8027
configured to deliver 12V from a 16V to 60V input. The
wide input range of the LTM8027 allows a variety of input
sources such as automotive batteries, wall adaptors and
industrial supplies. The LTM8027 is a step down converter,
so a minimum amount of headroom is required to keep
the output in regulation. A soft-start feature controls the
output voltage slewrate at start-up,reducing current surges
and voltage overshoots. The current mode control scheme
creates fast transient response and good loop stability.
perForMAnce sUMMArY
(TA= 25°C)
The LTM8027 data sheet gives a complete description of
the part, operation and application information. The data
sheet must be read in conjunction with this manual before
working on or modifying demo circuit 1307B.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
PARAMETER VALUE
Input Voltage Range 16V to 60V
Output Voltage VOUT 12V ±3%
Maximum Output Current 4A
Typical Switching Frequency 300kHz
DeMo BoArD photo

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DEMO MANUAL DC1307B
qUick stArt proceDUre
Demonstration circuit 1307B is an easy way to evaluate
the performance of the LTM8027. Refer to Figure 1 for
proper measurement equipment setup and follow the
procedure below:
1. Place JP1 on the ON position.
2. With power off, connect the input power supply to VIN
and GND. Preset the power supply within the input
voltage range.
3. Connect the load and preset to 0A.
4. Turn on the power at the input.
5. Check for the proper output voltage.
6. Once the proper output voltages are established, adjust
the loads within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters.
Figure 1. Proper Measurement Equipment Setup
+–
+
–
+
–
LOAD
+
–
+
–
+
–
dc1307b F02

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DEMO MANUAL DC1307B
qUick stArt proceDUre
Figure 2. DC1307B Output Noise Spectrum (VIN = 24V, VOUT = 12V, IOUT = 4A)
-120
-100
-80
-60
-40
-20
0
0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
INTENSITY (dBm)
FREQUENCY (MHz)

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DEMO MANUAL DC1307B
pArts list
ITEM QUANTITY REFERENCE DESCRIPTION MANUFACTURER’S PART NUMBER
Required Circuit Components
1 1 C5 Capacitor, COG, 1500pF, 100V, 5%, 0603 AVX, 06031A152JAT2A
2 1 C1 Capacitor, X5R, 2.2µF, 100V, 10%, 1210 TDK, C3225X5R2A225K
3 1 C2 Capacitor, X5R, 22µF, 16V, 20%, 1210 AVX, 1210YC226MAT2A
4 2 C3, C4 Capacitor, TQC, 68µF, 16V SANYO, 16TQC68M
5 1 R1 Resistor, Chip, 56.2k, 1/16W, 1%, 0603 Vishay, CRCW060356K2FKEA
6 1 R2 Resistor., Chip, 845k, 1/16W, 1%, 0603 Vishay, CRCW0603845KFKEA
7 1 R3 Resistor, Chip, 49.9k, 1/16W, 1%, 0603 Vishay, CRCW060349K9FKEA
8 1 R4 Resistor, Chip, 82.5k, 1/16W, 5%, 0603 Vishay, CRCW060382K5FKEA
9 1 U1 I.C., LTM8027EV#PBF, LGA,113-Pin Linear Technology, LTM8027EV#PBF
Additional Demo Board Circuit Components
1 1 CIN Capacitor, Aluminum, 22µF, 63V Sun Electronic, 63CE22BS
2 1 C6 Capacitor, X7R, 0.1µF, 50V, 10%, 0603 Murata, GRM188R71H104KA93D
3 0 C7 (Optional) Capacitor, Aluminum, 63V, 22µF
4 0 C8 (Optional) Capacitor, 1210
5 0 C9 (Optional) Capacitor, 1206
6 0 L2 (Optional) Inductor, 22µH Vishay, IHLP-4040DZER22R0M11
7 0 FB1 (Optional) Resistor, Chip, 1206
Hardware, for Demo Board Only
1 6 E1-E6 Testpoint, Turrent, .095” MILL-MAX, 2501-2-00-80-00-00-07-0
2 1 JP1 2mm Single Row Header, 3-Pin Samtec, TMM-103-02-L-S
3 1 JP1 Shunt Samtec, 2SN-BK-G
4 4 E7-E10 Banana Jack Keystone, 575-4
5 4 (Stand-Off) Stand-Off, Nylon 0.50" Tall Keystone, 8833(Snap On)

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DEMO MANUAL DC1307B
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 representation
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
BB
A A
16V - 60V
12V @ 4A
ON
OFF
100V
16V
1%
50V
1206(OPT)
1206
1210
(OPT)
(OPT)
VIN
VIN
FB1 (OPT)FB1 (OPT)
+
C4
68uF
16V
+
C4
68uF
16V
E4 VOUT E4 VOUT
C5
1500pF
C5
1500pF
+
Cin
22uF
63V
+
Cin
22uF
63V
+
C7
22uF
63V
+
C7
22uF
63V
+
C3
68uF
16V
+
C3
68uF
16V
JP1JP1
1
2
3
E5
GND E5 GND
C6
0.1uF
C6
0.1uF
U1
LTM8027EV
U1
LTM8027EV
VIN
H1
RT
B1
GND
A1
GND
E1
VOUT
E9
BIAS1
A6
GND
A8
GND
A9
GND
A10
GND
A11
GND
B2
GND
B4
GND
B5
GND
B6
GND
B7
GND
B8
GND
B9
GND
B10
GND
B11
GND
C2
GND
C3
GND
C4
GND
C5
GND
C6
GND
C7
GND
C8
GND
C9
GND
C10
GND
C11
GND
D1
GND
D2
GND
D3
GND
D4
GND
D5
GND
D6
GND
D7
GND
D8
GND
D9
GND
D10
GND
D11
GND
E2
GND
E3
GND
E4
GND
E5
GND
E6
GND
E7
GND
E8
GND
F1
GND
F2
GND
F3
GND
F4
GND
F5
GND
F6
GND
F7
GND
F8
GND
G5
GND
G6
GND
G7
GND
G8
GND
H5
GND
H6
GND
H7
GND
H8
GND
J5
GND
J6
GND
J7
GND
J8
GND
K5
GND
K6
GND
K7
GND
K8
GND
L5
GND
L6
GND
L7
GND
L8
AUX
A7
VOUT
E10
VOUT
E11
VOUT
F9
VOUT
F10
VOUT
F11
VOUT
G9
VOUT
G10
VOUT
G11
VOUT
H9
VOUT
H10
VOUT
H11
VOUT
J9
VOUT
J10
VOUT
J11
VOUT
K9
VOUT
K10
VOUT
K11
VOUT
L9
VOUT
L10
VOUT
L11
VIN
H2
VIN
H3
VIN
J1
VIN
J2
VIN
J3
VIN
K1
VIN
K2
VIN
K3
VIN
L1
VIN
L2
VIN
L3
RUN
A4
SYNC
C1
SS
A5
BIAS2
A3
ADJ
A2
GND
B3
E9 VOUT E9 VOUT
E7
VIN E7 VIN
E2 GND E2 GND E8 GND E8 GND
E3
SYNC E3 SYNC
C9
(OPT)
C9
(OPT)
R3
49.9K
R3
49.9K
L2 IHLP-4040CZER-220MLL2 IHLP-4040CZER-220ML
R4
82.5K
R4
82.5K
C1
2.2uF
C1
2.2uF
E10
GND E10 GND R1 56.2KR1 56.2K
C2
22uF
C2
22uF
E6 BIAS E6 BIAS
E1
VIN
E1
VIN
C8
2.2uF
C8
2.2uF
R2
845K
R2
845K

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DEMO MANUAL DC1307B
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2013
LT 0313 • 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 direc-
tive 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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