Linear Technology DC1392A Guida rapida alla configurazione
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DEMO MANUAL DC1392A
DESCRIPTION
LTM4604A
2.375VIN(MIN), 4A Step-Down
µModule Regulator
Demonstration circuit 1392A features the LTM
®
4604AEV,
the high efficiency, high density switch mode step-down
μModule
®
regulator. The input voltagerange is from 2.375V
to 5.5V with a jumper selectable output voltage from 0.8V
to 3.3V. The rated load current is 4A, while derating is
necessary for certain VIN, VOUT and thermal conditions.
By using the TRACK pin, the output can be set to coin-
cidentally or ratiometrically track to another voltage rail.
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.
BOARD PHOTO
The LTM4604A data sheet must be read in conjunction
with this demo manual prior to working on or modifying
demo circuit DC1392A.
Design files for this circuit board are available at
http://www.linear.com/demo
PERFORMANCE SUMMARY
(TA= 25°C)
PARAMETER CONDITION VALUE
Input Voltage Range 2.375V to 5.5V
Output Voltage, VOUT Jumper Selectable (Open for 0.8V) 1.2V, 1.5V, 1.8V, 2.5V, 3.3V; ±2%
Maximum Continuous Output Current Derating is Necessary for Certain VIN, VOUT and
Thermal Conditions
4A DC
Default Operating Frequency 1.25MHz
Efficiency VIN = 5V, VOUT = 3.3V, IOUT = 4A 88% Typical, See Figure 3
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DEMO MANUAL DC1392A
QUICK START PROCEDURE
Figure 1. Test Setup of DC1392A
Demonstration circuit 1392A is an easy way to evaluate the
performance of the LTM4604AEV. Please refer to Figure 1
for proper measurement equipment setup and follow the
procedure below:
1. Place jumpers in the following positions for a typical
1.2VOUT application:
VO SELECT TRACK RUN/SS
1.2V OFF ON
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 within the operating range of the
LTM4604A.
3. Turn on the power at the input. The output voltage
should be 1.2V ±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
5. To measure input and output ripple, please refer to
Figure 2 for proper setup.
6.
For optional load transient test, apply adjustable pulse
signal between IOSTEP CLK and GND pins. Pulse am-
plitude sets the current step. The pulse signal should
have very small duty cycle (<5%) to limit the thermal
stress on the transient load circuit. The output tran-
sient current can be monitored at BNC connector J1
(10mV/A), the output voltage can be monitored at BNC
connector J2.
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DEMO MANUAL DC1392A
PARTS LIST
ITEM QTY REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER
Required Circuit Components
1 2 C1, CO5 CAP., X5R, 100μF, 6.3V, 20%, 1812 TDK, C4532X5R0J107M
2 2 CIN1, CIN2 CAP., X5R, 10μF, 6.3V, 10%, 1206 AVX, 12066D106KAT2A
3 1 CO3 CAP., X5R, 22μF, 6.3V, 10%, 1206 AVX, 12066D226KAT2A
4 1 R5 RES., CHIP, 10k, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA
5 1 R2 RES., CHIP, 510k, 1/16W, 5%, 0603 VISHAY, CRCW0603510KJNEA
6 1 U1 I.C., LTM4604AEV LINEAR TECH., LTM4604AEV#PBF
Additional Demo Board Circuit Components
1 0 C2 (OPT) CAP., 0603
2 1 C3 CAP., X5R, 4.7μF, 6.3V, 10%, 0603 AVX, 06036D475KAT2A
3 0 CO1, CO2 (OPT) CAP., 1210
4 0 CO4 (OPT) CAP., 1812
5 0 CSS, CP, CFF (OPT) CAP., 0603
6 1 Q1 N-CHANNEL 30V MOSFET, TO-252 VISHAY, SUD50N03-10CP-E3
7 1 R1 RES., CHIP, 100K, 1/16W, 5% ,0603 VISHAY, CRCW0603100KJNEA
8 1 R3 RES., CHIP, 10K, 1/16W, 1%, 0603 VISHAY, CRCW060310K0FKEA
9 1 R4 RES., CHIP, 0.01Ω, 0.5W, 1% ,1206 VISHAY, WSL1206R0100FEA18
10 1 R6 RES., CHIP 5.76k, 1/16W, 1%, 0603 VISHAY, CRCW06035K76FKEA
11 1 R7 RES., CHIP 4.02k, 1/16W, 1%, 0603 VISHAY, CRCW06034K02FKEA
12 1 R8 RES., CHIP, 2.37k, 1/16W, 1%, 0603 VISHAY, CRCW06032K37FKEA
13 1 R9 RES., CHIP, 1.58k, 1/16W, 1%, 0603 VISHAY, CRCW06031K58FKEA
14 0 R10-R12 (OPT) RES., 0603
Hardware–For Demo Board Only
1 2 J1, J2 CONN, BNC, 5-PINS CONNEX, 112404
2 5 JP1-JP5 2MM SINGLE ROW HEADER, 2-PIN SAMTEC, TMM-102-02-L-S
3 2 JP6, JP7 2MM SINGLE ROW HEADER, 3-PIN SAMTEC, TMM-103-02-L-S
4 3 JP1, JP6, JP7 SHUNT SAMTEC, 2SN-BK-G
5 10 TP1, TP4-TP9, TP12, TP14, TP15 TESTPOINT, TURRET, 0.095" MILL-MAX, 2501-2-00-80-00-00-07-0
6 4 TP2, TP3, TP10, TP11 BANANA JACK KEYSTONE, 575-4
7 4 STAND OFF STAND-OFF, NYLON 0.50" TALL KEYSTONE, 8833 (SNAP ON)
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DEMO MANUAL DC1392A
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
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DEMO MANUAL DC1392A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900 ●FAX: (408) 434-0507 ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2011
LT 0511 • 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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