Linear Technology DC2016A Quick setup guide

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

dc2016af

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

1.8

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

dc2016af

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.

dc2016af

DEMO MANUAL DC2016A

Figure 1. Proper Measurement Equipment Setup

Quick start proceDure

–

0V TO 35VDC

DC2016 F01

REMOVABLE CONNECTION

IS OPTIONAL FOR PROPER

START-UP

12VDC

0A TO 3A

OPTIONAL WITH

R7 = OPEN

OPTIONAL

+–

–

–+

–

3.3V

dc2016af

DEMO MANUAL DC2016A

Quick start proceDure

INPUT VOLTAGE (V)

MAXIMUM OUTPUT CURRENT (A)

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

OUT

GND

C13

FREQUENCY (MHz)

–100

INTENSITY (dBm)

–10

–20

–30

–40

–50

–60

–70

–80

–90

0.5 3 3.5 4 4.5 51 1.5 2

dc2016 F04

2.5

dc2016af

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

dc2016af

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

100K

GND

CTL

R11

121k

OPT

R12

LTM8054EY

VOUT

GND

SVIN

VIN

IIN

CLKOUT

IOUT

SYNC

COMP

CTL

GND

IOUTMON

IINMON

RUN

GND

MODE

OPT

1206

OPT

C10

OPT

SYNC

VIN

OPT

8m m DIA.

8mm DIA.

OPT

100uF

50V

8mm DIA.

4.7uF

50V

0805

TP7

CTL

TP4

CLKOUT

TP5

SYNC

0.22uF

16V

VIN

6V - 35V

GND

MODE

OPT

SOD-123

OPT

SOD-123

VOUT

E1 0

IOUTMON

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

CLKOUT

22uF

25V

0805

68uF

20V

7343

22uF

25V

0805

R10

332k

VIN

IOUTMON

VIN

C15

OPT

E1 3

GND

TP8

IOUTMON BUFFER ED

R14

OPT C16

OPT

E1 2

RUN

SVIN

6V - 35V

0.015

1206

V+

V-

SHDN

LT1636CMS8

OPT

11K

VOU T

E1 4

VOU T

12V

SEE FIGURE 2

FOR MAXIMUM OUTPUT CURRENT

VERSUS INPUT VOLTAGE

R15OPT

0.01uF

4.7uF

50V

0805

E1 5

GND

R13

OPT

dc2016af

DEMO MANUAL DC2016A

Linear Technology Corporation

1630 McCarthy Blvd., Milpitas, CA 95035-7417

(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com

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

Mouser Electronics

Authorized Distributor

Click to View Pricing, Inventory, Delivery & Lifecycle Information:

Analog Devices Inc.:

DC2016A

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