Linear Technology DC1198B-A Quick setup guide

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dc1198bafa
DEMO MANUAL DC1198B-A
Description
LTM4605
20V, 5A High Efficiency
Buck-Boost µModule Regulator
Demonstration circuit DC1198B-A features the
LT M
®
4605EV, the high efficiency, high density switch
modebuck-boostµModule
®
regulator. The LTM4605EV can
regulate its output voltage from an input voltage above,
below, or equal to the output. The input voltage range
of DC1198B-A is from 4.5V to 20V with a preset output
voltage of 12V. The rated load current is 5A, although
derating is necessary for certain VIN, VOUT, and thermal
conditions. The switching frequency may be synchronized
to an external clock from 200kHz to 400kHz. This PLL
L, LT, LTC, LTM, µModule, Linear Technology and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
perForMAnce sUMMArY
BoArD photo
can be used not only to reduce undesirable frequency
harmonics but also to parallel LTM4605 to provide high
output current. The LTM4605 data sheet must be read in
conjunction with this demo manual prior to working on
or modifying DC1198B-A.
Design files for this circuit board are available at
http://www.linear.com/demo
(TA= 25°C)
PARAMETER CONDITIONS VALUE
Input Voltage Range VIN 4.5V to 20V
Output Voltage VOUT VIN = 12V, IOUT = 5A. 12V ± 2%
Maximum Continuous Output Current Derating Is Necessary for Certain VIN, VOUT, and
Thermal Conditions
5ADC at 5VIN
12ADC at VIN > VOUT
Default Operating Frequency 300kHz
Efficiency VIN = 12V, VOUT = 12V, IOUT = 5A 97.6%, See Figure 3 for More Information
Load Transient VIN = 5V, VOUT = 12V See Figure 4 for Details

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dc1198bafa
DEMO MANUAL DC1198B-A
qUick stArt proceDUre
Figure 1. Test Setup of DC1198B-A
Demonstration circuit DC1198B-A isaneasywayto evaluate
the performance of the LTM4605EV. Please refer to Figure
1 for proper measurement equipment set-up and follow
the procedure below:
1. Place jumpers in the following positions for a typical
12VOUT application:
RUN CLOCK MODE START
ON PROG CCM SSO
2. With power off, connect the input power supply, load
and meters as shown in Figure 1. Preset the load to 0A
and VIN supply to be less than 20V.
3. Turn on the power at the input. The output voltage
should be 12V ± 2%.
4. Once the proper output voltage is established, adjust
the load within the operating range and observe the
output voltage regulation, ripple voltage, efficiency and
other parameters. Cooling fan andlower current sensing
resistor are necessary for VIN < 5V and IOUT = 5A.
5. To measure input and output ripple, please refer to
Figure 2 for proper setup.
6. The voltage of pin PLLFLTR determines the switching
frequency. Modify R6 and R7 to adjust the switching
frequency. Turn off the power supply before attempting
to remove and replace R6 and R7. Do not allow voltage
at pin PLLFLTR exceed 2.4V.
7. The Inductor, RS1 and RS2 should be modified to ac-
commodate certain input and output condition. Please
refer to the LTM4605 data sheet for recommended
component values.
DC1198B F01

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dc1198bafa
DEMO MANUAL DC1198B-A
qUick stArt proceDUre
Figure 2. Proper Scope Probe Placement for Measuring Input or Output Ripple
Figure 3. Measured Supply Efficiency with Different VIN. (VOUT = 12V)
Figure 4. Measured Load Transient Response (2.5A Step, 25% to 75%)
LOAD CURRENT (A)
0
EFFICIENCY (%)
80
90
100
6 8 10
DC1198B F03
70
60 2 4 12
VIN = 5V
VIN = 12V
VIN = 20V
DC1198B F02
INPUT OR OUTPUT CAPACITOR
VIN = 5V, VOUT = 12V
CONTINUOUS CURRENT MODE (CCM)
1.25A TO 3.75A LOAD STEP
COUT = 2x22µF CERAMIC (1812, X7R), 2x180µF OSCON (16V)
PEAK-TO-PEAK OUTPUT VOLTAGE DEVIATION = 413mV
200µs/DIV
VOUT
AC-COUPLED
100mV/DIV
ISTEP
2A/DIV
DC1198B F04

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dc1198bafa
DEMO MANUAL DC1198B-A
pArts list
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 1 CIN1 CAP, ALUM, 150µF, 20%, 35V SANYO, 35ME150WXV+TS (NOW SUNCON 35ME150WXV)
2 2 CIN2, CIN3 CAP, X7R, 10µF, 20%, 35V, 1206 TAIYO YUDEN, GMK316BJ106ML-T
3 1 CSS CAP, X7R, 0.01µF, 25V, 10%, 0603 AVX 06033C103KAT4A
4 2 CO3, CO4 CAP, X7R, 22µF, 16V, 20%, 1812 TDK C4532X7R1C226M
5 2 CO5, CO6 CAP, OS-CON, 180µF, 16V SANYO 16SVP180MX
6 1 L1 IND IRON POWER SMT FIXED, 3.3µH TOKO FD1254-3R3M=P3
7 1 R5 RES, CHIP, 7.15k, 1/16W, 1%, 0603 VISHAY CRCW06037K15FKEA
8 1 R6 RES, CHIP, 4.64k, 1/16W, 1%, 0603 VISHAY CRCW06034K64FKEA
9 1 R7 RES, CHIP, 1.21k, 1/16W, 1%, 0603 VISHAY CRCW06031K21FKEA
10 2 RS1, RS2 RES, CHIP, 0.015 1/2W, 1%, 1206 VISHAY WSL1206R0150FEA
11 1U1 I.C., LTM4605EV#PBF LINEAR TECHNOLOGY CORPORATION LTM4605EV#PBF
Additional Demo Board Circuit Components
1 0 CIN4, CIN5 (OPT) CAP, 1206
2 0 C2, C4, C5, CP, CFF
(OPT)
C A P, 0 6 0 3
3 0 CO1, CO2 (OPT) CAP, SVP, 100µF, D3L
4 0 CO7 (OPT) CAP, 1206, 16V
5 0 CO8 (OPT) POSCAP, D3L
6 2 D1, D2 ZENER DIODE, 4.7V CENTRAL SEMICONDUCTOR CMDZ5230B-7-F
7 1 R1 RES, CHIP, 100k, 1/16W, 5%, 0603 VISHAY CRCW0603100KJNEA
8 1 R2 RES, CHIP, 51k, 1/16W, 5%, 0603 VISHAY CRCW060351K0JNEA
9 1 R8 RES, CHIP, 20k, 1/16W, 1%, 0603 VISHAY CRCW060320K0FKEA
10 1RS3 (OPT) RES,1206
11 1 R9, RUVLO (OPT) RES, 0603
Hardware/Components (For Demo Board Only)
1 2 JP1, JP2 2mm SINGLE ROW HEADER, 3 PIN SAMTEC TMM-103-02-L-S
2 2 JP3, JP4 2mm SINGLE ROW HEADER, 4 PIN SAMTEC TMM-104-02-L-S
3 4 JP1, JP2, JP3, JP4 SHUNT SAMTEC 2SN-BK-G
410 TP1, TP4, TP5, TP7,
TP9, TP11 TO TP15
TESTPOINT, TURRET, 0.095” MILL-MAX 2501-2-00-80-00-00-07-0
5 4 TP2, TP3, TP8, TP10 BANANA JACK KEYSTONE 575-4
6 4 STAND OFF STAND OFF, NYLON 0.50” TALL KEYSTONE 8833 (SNAP ON)

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dc1198bafa
DEMO MANUAL DC1198B-A
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
A
A
B
B
A A
BB
5A MAX
RUN
ON OFF
DCM
CCM
BS (BURST/SKIP_CYCLE) OFF
SSO (SOFT START ON) LO (LDO ON)
EXT
PROG
CLOCK
12V
MODE
*
Degrading Necessary for Certain Input and Output Voltages.
*
START
DCM
SOFT START ON LDO ON
OFF
MODE
OFF
SSO
BURST/
LO
START
CCM CCM DCM BS
*
SKIP_CYCLE
*
*
VERSION *
4.7uH 3.3uH- A
L Cin1 Cin2, Cin3
35V, 150uF 10uF, 35V, 1206, X7R
4.7uF, 50V, 1206, X5R
ASSY TABLES
**
*
*
50V, 100uF
*
U1
LTM4605EV LTM4607EV
**
*
*
** **
**
- B
VIN
4.5V - 20V
6V - 36V
**
HIGH DENSITY BUCK-BOOST POWER µMODULE R
VSS
VIN
INTVCC
VOUT
VIN
INTVCC
VIN
INTVCC
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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.
SCALE = NONE
www.linear.com
1
Thursday, January 24, 2013
1 1
HZ
SAM Y.
N/A
LTM4605EV / LTM4607EV
DEMO CIRCUIT 1198B-A/B
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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.
SCALE = NONE
www.linear.com
1
Thursday, January 24, 2013
1 1
HZ
SAM Y.
N/A
LTM4605EV / LTM4607EV
DEMO CIRCUIT 1198B-A/B
SIZE
DATE:
.VER.ONCI
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
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.
SCALE = NONE
www.linear.com
1
Thursday, January 24, 2013
1 1
HZ
SAM Y.
N/A
LTM4605EV / LTM4607EV
DEMO CIRCUIT 1198B-A/B
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
SAM Y.PRODUCTION 21-82-91
1
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
SAM Y.PRODUCTION 21-82-91
1
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
SAM Y.PRODUCTION 21-82-91
1
TP15
INTVCC TP15 INTVCC
C5
(OPT)
C5
(OPT)
TP11 VO- TP11 VO-
RS3
(OPT)
RS3
(OPT)
TP3
VIN- TP3 VIN- R9
(OPT)
1%
R9
(OPT)
1%
JP1JP1
1
2
3
Cin2
10uF
Cin2
10uF
CP
(OPT)
CP
(OPT)
Cin4
(OPT)
Cin4
(OPT)
L1L1
RS1
0.015
RS1
0.015
U1U1
VIN
L12
VIN
K11
VIN
J10
VIN
M10
VIN
L11 VIN L10 VIN
K12
VIN
J11
VIN
J12
VIN
K10
GND
C11
GND
C10
GND
C9
GND
C8
GND
C7
GND
C5
GND
C4
GND
C3
GND
C2
GND
C1
GND
B4
GND
B3
GND
B2
GND
C6
GND
B1
GND
A3
GND
A2
GND
A1
VOUT G2
VOUT G3
VOUT G4
VOUT H1
VOUT H2
VOUT H3
VOUT H4
COMP
B7
EXTVCC
F6
SS
A6
RSENSE G5
GND
C12GND
D1 GND
D2 GND
D3 GND
D4
GND
D9
GND
D8
GND
D7
GND
D6
GND
D5
GND
D10
VFB B6
SW1 J1
SW2 J8
VOUT G1
VOUT E2
VOUT E1
VIN
M11
VIN
M12
INTVCC
F5
PGOOD
B5
RUN
A8
PLLFLTR
B8
PLLIN
B9
FCB
A9
STNDBY
A10
SGND
A7
GND
D11GND
D12GND
E3 GND
E4 GND
E5 GND
E6 GND
E7 GND
E8 GND
E9 GND
E10 GND
E11 GND
E12
GND
A11 GND
A12
GND
B10 GND
B11 GND
B12
SENSE+ A4
SENSE- A5
RSENSE G6 RSENSE G7 RSENSE G8
RSENSE G9
RSENSE G10 RSENSE G11 RSENSE G12
RSENSE H5
RSENSE H6 RSENSE H7 RSENSE H8
RSENSE H9
RSENSE H10 RSENSE H11 RSENSE H12
RSENSE J5
RSENSE J6 RSENSE J7 RSENSE K5
RSENSE K6
RSENSE L5
RSENSE L6 RSENSE M5
RSENSE M6
RSENSE F10 RSENSE F11 RSENSE F12
VOUT F1
VOUT F2
VOUT F3
VOUT F4
SW1 J2
SW1 J3
SW1 J4
SW1 K1
SW1 K2
SW1 K3
SW1 K4
SW1 L1
SW1 L2
SW1 L3
SW1 L4
SW1 M1
SW1 M2
SW1 M3
SW1 M4
SW2 J9
SW2 K7
SW2 K8
SW2 K9
SW2 L7
SW2 L8
SW2 L9
SW2 M7
SW2 M8
SW2 M9
NC F8
NC F9
NC F7
RUVLO
(OPT)
RUVLO
(OPT)
+
Cin1
+
Cin1
RS2
0.015
RS2
0.015
CFF
(OPT)
CFF
(OPT)
R7
1.21K
R7
1.21K
TP7 VO+ TP7 VO+
CO5
180uF
16V
CO5
180uF
16V
R2
51K
R2
51K
TP9
EXTVCC TP9 EXTVCC
JP4JP4
1
2
3
4
Cin5
(OPT)
Cin5
(OPT)
TP1
VIN TP1 VIN
CO3
22uF
25V CO3
22uF
25V
D2
CMDZ5230B
D2
CMDZ5230B
2 1
TP13
SGND TP13 SGND
CO7
(OPT)
16V
CO7
(OPT)
16V
R5
7.15K
5%
R5
7.15K
5%
TP2
VIN+ TP2 VIN+
TP5
PGOOD TP5 PGOOD
TP4
GND TP4 GND
TP12
SOFT START TP12 SOFT START
CO4
22uF
25V CO4
22uF
25V
CO8
(OPT)
CO8
(OPT)
JP3JP3
1
2 3
4
TP14
EXT. CLOCK TP14 EXT. CLOCK
Cin3
10uF
Cin3
10uF
CSS 10nF CSS 10nF
JP2JP2
1
2
3
TP10
GND
TP10
GND
CO2
(OPT)
CO2
(OPT)
C2 (OPT)C2 (OPT)
TP8 VOUT TP8 VOUT
R8 20KR8 20K
C4 (OPT)
10V
C4 (OPT)
10V
R1
100K
R1
100K
CO1
(OPT)
CO1
(OPT)
R6 4.64KR6 4.64K
CO6
180uF
16V
CO6
180uF
16V
D1
CMDZ5230B
D1
CMDZ5230B
2 1

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dc1198bafa
DEMO MANUAL DC1198B-A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
 LINEAR TECHNOLOGY CORPORATION 2011
LT 0213 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 applica-
tion engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation

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