Linear Technology DC2016A Quick setup guide

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dc2016af
DEMO MANUAL DC2016A
Description
LTM8054
36VIN, 5.4A Buck-Boost
μModule Regulator
Demonstration circuit 2016A features the LTM8054, a
synchronous buck-boost μModule regulator that accepts
input voltages lower, higher or the same as the output,
but is also highly efficient due to its four-switch archi-
tecture. The output for DC2016A is 12V and the input
voltage range is 6V to 35V– see the LTM8054 data sheet
for application circuits with input voltages up to 36V.
The maximum output current of DC2016A is 3A and the
switching frequency is 600kHz.
DC2016Asupportstheadjustable and controllable features
of the LTM8054 including output voltage and current
regulation, switching frequency, RUN threshold, soft-
start period, synchronization and reverse inductor current
inhibit. In most cases, adjustment is made by modifying
the appropriate resistor or capacitor component(s).
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
DC2016A provides output current monitoring and a clock
output. Input current monitoring and regulation requires
the installation of a current sense resistor. The SVIN input
for controller power can be made a diode-OR of power
VIN and the output voltage to extend the operating range
of power VIN to lower voltages. There are places to mount
optional components that add an LC input filter and also a
unity gain buffer to operate multiple DC2016As in parallel.
The LTM8054 data sheet must be read in conjunction with
this demo manual to properly use or modify DC2016A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2016A
BoarD photo

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DEMO MANUAL DC2016A
performance summary
Specifications are at TA= 25°C
PARAMETER CONDITIONS MIN TYP MAX UNITS
Minimum Input Voltage, VIN 6 V
Maximum Input Voltage, VIN 35 V
Maximum Output Current, IOUT 12V < VIN < 35V, CTL = OPEN
VIN = 6V, CTL = OPEN
3
1.8
A
A
Input Turn-On Voltage, VIN R10 = 332k, R11 = 121k, VIN Rising 5.5 V
Input Turn-Off Voltage, VIN R10 = 332k, R11 = 121k, VIN Falling 4.5 V
Output Voltage, VOUT 100mA < IOUT < 3A (See Figure 2), R2 = 11k
1%, R3 = 100k 1%, R4 = 0.015Ω
11.7 12.5 V
Efficiency VIN = 24V, IOUT = 3A 92 %
Switching Frequency R1 = 36.5k 600 kHz
Output Current Limit R4 = 0.015Ω 3.6 A

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DEMO MANUAL DC2016A
Quick start proceDure
To use DC2016A to evaluate the performance of the
LTM8054, refer to Figure 1 for the proper measurement
equipment setup, Figure 2 for the maximum output current
versus input voltage and then follow the procedure below:
NOTE: Do not hot-plug the VIN terminal at high input volt-
ages. The absolute maximum voltage rating for VIN of the
LTM8054 is 40V and hot-plugging a power supply through
wireleadstothe demonstration circuitcancausethevoltage
on the extremely low ESR ceramic input capacitor to ring
to twice its DC value. In order to protect the LTM8054, an
aluminum electrolytic capacitor with higher ESR is placed
at the input terminals. This may protect against some, but
not all, input transientsdue to a hot-plugged power supply.
See Application Note 88 for more details.
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 to terminals across
the VIN or VOUT capacitors. See Figure 3 for proper scope
probe technique. Solder terminals near the input or output
capacitors, if necessary.
1. Connect the RUN terminal to ground with a clip-on lead.
Connect the power supply (with power off), load, and
meters as shown in Figure 1.
2. After all connections are made, turn on the input power
and verify that the input voltage is between 6V and 35V
3. Remove the clip-on lead from RUN. Verify that VOUT is
12V.
NOTE: If VOUT is too low, temporarily disconnect the load
to make sure that the load is not set too high.
Once the proper output voltage is established, adjust the
input voltage and load within the operating range and
observe the output voltage regulation, ripple voltage, ef-
ficiency and other parameters.

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DEMO MANUAL DC2016A
Figure 1. Proper Measurement Equipment Setup
Quick start proceDure
+
–
+
–
–
+
0V TO 35VDC
4A
DC2016 F01
REMOVABLE CONNECTION
IS OPTIONAL FOR PROPER
START-UP
12VDC
0A TO 3A
OPTIONAL WITH
R7 = OPEN
OPTIONAL
+–
+
–
–+
+
–
3.3V
0V
2V
0V

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DEMO MANUAL DC2016A
Quick start proceDure
INPUT VOLTAGE (V)
0
MAXIMUM OUTPUT CURRENT (A)
6
5
2
4
0
3
1
dc2016 F02
36126 2418 30
12VOUT
R4 = SHORT
R4 = 0.015Ω
Figure 2. Maximum Output Current vs Input Voltage for VOUT = 12V
Figure 3. Proper Scope Probe Technique
Figure 4. Conducted VOUT Noise Spectrum Using HP 4395A Spectrum
Analyzer and 41800A Active Probe. VIN = 24V and VOUT = 12V at 3A
V
OUT
GND
C13
FREQUENCY (MHz)
0
–100
INTENSITY (dBm)
–10
–20
–30
–40
–50
–60
–70
–80
–90
0
0.5 3 3.5 4 4.5 51 1.5 2
dc2016 F04
2.5

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DEMO MANUAL DC2016A
parts List
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, C2 CAP., 4.7µF, X5R, 50V, 10%, 0805 SAMSUNG, CL21A475KBQNNNE
2 1 C3 CAP., 0.22µF, X7R, 16V, 10%, 0603 TDK, C1608X7R1C224K080AC
3 1 C4 CAP., 0.01µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C103KA01D
4 2 C5, C6 CAP., 22µF, X5R, 25V, 20%, 0805 SAMSUNG, CL21A226MAQNNNE
5 1 C7 CAP., TANT. POLYMER, 68µF, 20V, 20%, 7343 AVX, TCJD686M020R0055
6 1 R1 RES., 36.5k, 1%, 1/10W, 0603 VISHAY, CRCW060336K5FKEA
7 1 R2 RES., 11k, 1%, 1/10W, 0603 VISHAY, CRCW060311K0FKEA
8 1 R3 RES., 100k, 1%, 1/10W, 0603 VISHAY, CRCW0603100KFKEA
9 1 R4 RES., SENSE, 0.015Ω, 1%, 1/2W, 1206 VISHAY, WSL1206R0150FEA
10 1 U1 IC, 36VIN Buck-Boost µModule Regulator LINEAR TECH., LTM8054EY#PBF
Optional Demo Board Circuit Components
1 0 C8, C10, C15, C16(OPT) CAP., 0603
2 1 C9 CAP., ALUM. ELECT., 100µF, 50V, 20%,
8mm x 10.2mm
SUN ELECT., 50CE100LX
30 C11, C12(OPT) CAP., 1210
4 1 C13 CAP., 0.1µF, X7R, 16V, 10%, 0603 MURATA, GRM188R71C104KA01D
5 0 C14(OPT) CAP., 0805
6 0 D1, D2(OPT) DIODE, OPTION, SOD-123
7 0 L1, L2(OPT) INDUCTOR, 8mm DIA.
8 0 R5, R9, R13, R14,
R15(OPT)
RES., CHIP, 0603
9 2 R6, R7 RES., 0Ω, 1/10W, 0603 VISHAY, CRCW0603000Z0EA
10 0 R8(OPT) RES., OPTION, 1206
11 1 R10 RES., 332k, 1%, 1/10W, 0603 VISHAY, CRCW0603332KFKEA
12 1 R11 RES., 121k, 1%, 1/10W, 0603 VISHAY, CRCW0603121KFKEA
13 1 R12 RES., 20Ω, 5%, 1/10W, 0603 VISHAY, CRCW060320R0JNEA
14 0 U2(OPT) IC, R-R I/O OP AMP, MSOP-8 LINEAR TECH., LT1636CMS8#PBF
Hardware
1 15 E1-E15 TESTPOINT, TURRET, .094" MTG. HOLE MILL-MAX, 2501-2-00-80-00-00-07-0
2 4 MH1-MH4 STANDOFF, NYLON, SNAP-ON, 0.500" KEYSTONE, 8833

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DEMO MANUAL DC2016A
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
*
*
C13
0.1uF
R3
100K
E6
GND
E7
CTL
R11
121k
C8
OPT
R12
20
5%
U1 LTM8054EY
VOUT
A1
VOUT
A2
VOUT
A3
VOUT
A4
VOUT
A5
VOUT
B1
VOUT
B2
VOUT
B3
VOUT
B4
VOUT
B5
GND
G7
GND
G8
SVIN
H7
SVIN
H8
VIN
J7
VIN
J8
VIN
K7
VIN
K8
VIN
L8
VIN
L7
IIN
L6
CLKOUT
G1
IOUT
C1
RT
H1
SYNC
H2
FB
J1
COMP
J2
CTL
K2
SS
K1
GND
L1
IOUTMON
L2
IINMON
L3
RUN
L4
GND
A6
GND
A7
GND
A8
GND
B6
GND
B7
GND
B8
GND
C2
GND
C3
GND
C4
GND
C5
GND
C6
GND
C7
GND
C8
GND
D1
GND
D2
GND
D3
GND
D4
GND
D5
GND
D6
GND
D7
GND
D8
GND
E1
GND
E2
GND
E3
GND
E4
GND
E5
GND
E6
GND
E7
GND
E8
F1
LL
GND
F2
GND
F3
GND
F4
GND
F5
GND
F6
GND
F7
GND
F8
GND
G3
GND
G4
GND
G5
GND
G6
GND
H3
GND
H4
GND
H5
GND
H6
GND
J3
GND
J4
GND
J5
GND
J6
GND
K3
GND
K4
GND
K5
GND
K6
GND
L5
MODE
G2
R8
OPT
1206
R5
OPT
C10
OPT
E9
LL
E5
SYNC
VIN
L2
OPT
8m m DIA.
L1
8mm DIA.
OPT
+
C9
100uF
50V
8mm DIA.
R7
0
C1
4.7uF
50V
0805
TP7
CTL
TP4
CLKOUT
TP5
SYNC
C3
0.22uF
16V
E1
VIN
6V - 35V
E2
GND
E8
MODE
D1
OPT
SOD-123
D2 OPT
SOD-123
VOUT
E1 0
IOUTMON
R1
36.5k
C14 OPT
0805
TP6
GND
IOUTMON
E1 1
IINMON
TP1
VIN
600kH z
C11
1210 OPT
C12
1210
OPT
VIN
1. ALL RESISTORS ARE 0603 1% ALL CAPACITORS ARE 0603.
NOTE: UNLESS OTHERWISE SPECIFIED
TP2
GND
R6
0
E4
CLKOUT
C5
22uF
25V
0805
+
C7
68uF
20V
7343
C6
22uF
25V
0805
R10
332k
VIN
IOUTMON
VIN
C15 OPT
E1 3
GND
TP8
IOUTMON BUFFER ED
R14
OPT C16
OPT
E1 2
RUN
E3
SVIN
6V - 35V
R4
0.015
1206
- +
V+
V-
SHDN
U2 LT1636CMS8
OPT
3
2
6
7
4
5
R2
11K
VOU T
E1 4
VOU T
12V
SEE FIGURE 2 FOR MAXIMUM OUTPUT CURRENT
VERSUS INPUT VOLTAGE
R15OPT
C4
0.01uF
C2
4.7uF
50V
0805
E1 5
GND
R13
OPT
R9
OPT

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DEMO MANUAL DC2016A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2015
LT 0915 • 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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