Linear Technology DC1307A Quick setup guide

1
dc1307af
DEMO MANUAL DC1307A
DESCRIPTION
LTM8027:
60V, 4A DC/DC
µModule
®
Regulator
Demonstration circuit 1307A 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 1307A.
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

2
dc1307af
DEMO MANUAL DC1307A
QUICK START PROCEDURE
Demonstration circuit 1307A 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:
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 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.

3
dc1307af
DEMO MANUAL DC1307A
QUICK START PROCEDURE
Figure 1. Proper Measurement Equipment Setup
Figure 2. Measuring Input or Output Ripple

4
dc1307af
DEMO MANUAL DC1307A
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
11C
IN 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)

5
dc1307af
DEMO MANUAL DC1307A
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 B B A A
16V - 60V
12V @ 4A
ON
OFF
100V
16V
1%
50V
1206 (OPT)
1206
1210
(OPT)
(OPT)
R

0RQGD\6HSWHPEHU

9$'&'&X02'8/(5(*8/$725
+(/(1
:(,*8
$
/70(9
'(02&,5&8,7$
6,=( '$7(
,&12 5(9
6+((7 2)
7,7/(
&2175$&712
$33529$/6
3&%'(6
(1*
TECHNOLOGY
)D[ 0LOSLWDV&$ 3KRQH 0F&DUWK\%OYG /7&&RQILGHQWLDO)RU&XVWRPHU8VH2QO\
&86720(5127,&(
/,1($57(&+12/2*<+$60$'($%(67())25772'(6,*1$ &,5&8,77+$70((76&86720(56833/,('63(&,),&$7,216 +2:(9(5,75(0$,167+(&86720(565(63216,%,/,7<72 9(5,)<3523(5$1'5(/,$%/(23(5$7,21,17+($&78$/ $33/,&$7,21&20321(1768%67,787,21$1'35,17(' &,5&8,7%2$5'/$<2870$<6,*1,),&$17/<$))(&7&,5&8,7 3(5)250$1&(255(/,$%,/,7<&217$&7/,1($5 7(&+12/2*<$33/,&$7,216(1*,1((5,1*)25$66,67$1&(
7+,6&,5&8,7,635235,(7$5<72/,1($57(&+12/2*<$1' 6833/,(')2586(:,7+/,1($57(&+12/2*<3$576
6&+(0$7,&
:(,*8352'8&7,21
5(9,6,21+,6725< '(6&5,37,21 '$7($33529('(&2 5(9
VIN
VIN
FB1 (OPT)
+
C4
X)
9
E4 VOUT
+
Cin
X)
9
C5
1500pF
+
C7
X)
9
+
C3
X)
9
JP1
1
2
3
E5
GND
C6
0.1uF E9 VOUT
U1
LTM8027EV
H1
B1
A1
E1
E9 A6
A8
A9
A10
A11
B2
B4
B5
B6
B7
B8
B9
B10
B11
C2
C3
C4
C5
C6
C7
C8
C9
C10
C11
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
E2
E3
E4
E5
E6
E7
E8
F1 F2 F3 F4 F5 F6 F7 F8 G5 G6 G7 G8 H5 H6 H7 H8 J5 J6 J7 J8 K5 K6 K7 K8 L5 L6 L7 L8 A7 E10 E11
F9
F10
F11
G9
G10
G11
H9
H10
H11
J9
J10
J11
K9
K10
K11
L9
L10
L11
H2 H3
J1 J2 J3
K1 K2 K3
L1 L2 L3
A4
C1
A5 A3 A2 B3
VIN RT
GND
GND
VOUT
BIAS1
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND
AUX
VOUT VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VOUT
VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN VIN RUN SYNC SS BIAS2 ADJ GND
E7
VIN
E2 GND E8 GND
E3
SYNC
C9
(OPT)
R3
49.9K
L2 IHLP-4040CZER-220ML
R4
82.5K
C1
2.2uF
E10
GND R1 56.2K
C2
22uF
E6 BIAS
E1
VIN
C8
2.2uF
R2
845K

6
dc1307af
DEMO MANUAL DC1307A
LinearTechnology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2010
LT 1210 • 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