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DESCRIPTION
Demonstration circuit 2171A-A features the
µModule
regulator, a tiny low profile high performance
®
step-down regulator. The LTM4623 has an operating input
voltage range of 4V to 20V and is able to provide an output
current of up to 3A. The output voltage is pro-grammable
from 0.6V to 5V. The LTM4623 is a complete DC/DC point
of load regulator in a 6.25mm × 6.25mm × 1.82mm round
pad LGA package requiring only a few input and output
capacitors. Output voltage tracking is available through the
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Output Voltage V
OUT
Maximum Continuous Output Current
Default Operating Frequency
Efficiency
BOARD PHOTO
Arrow.com.
Downloaded from
DEMO MANUAL DC2171A-A
LTM
4623
TRACK/SS pin for supply rail sequencing. CLKIN, CLKOUT
®
and PHMODE pins are available for clock synchronization
and interleaving. The LTM4623 data sheet must be read
in conjunction with this demo manual prior to working on
or modifying demo circuit 2171A-A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2171A-A
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.
Specifications are at 25°C
CONDITIONS / NOTES
Jumper Selectable
Derating Is Necessary for Certain Operating
Conditions. See Data Sheet for Details
V
= 12V, V
= 1.8V, I
= 3A
IN
OUT
OUT
3A Ultrathin Step-Down
µModule Regulator
VALUE
4V to 20V
1.0VDC, 1.2VDC, 1.5VDC, 1.8VDC, 2.5VDC,
3.3VDC, 5VDC
3ADC
1MHz
83.2% See Figure 2
LTM4623
dc2171a-af
1
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Summary of Contents for Linear Technology DC2171A-A
- Page 1 LGA package requiring only a few input and output L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear capacitors. Output voltage tracking is available through the Technology Corporation. All other trademarks are the property of their respective owners.
- Page 2 DEMO MANUAL DC2171A-A QUICK START PROCEDURE Demonstration circuit 2171A-A is an easy way to evaluate 5. Once the proper output voltage is established, adjust the performance of the LTM4623. Please refer to Figure 1 the load current within the 0A-3A range and observe for test setup connections and follow the procedure below.
- Page 3 DEMO MANUAL DC2171A-A QUICK START PROCEDURE 3.3V 2.5V 3.3V 1.8V 2.5V 1.5V 1.8V 1.2V 1.5V 1.0V 1.2V 1.0V LOAD CURRENT (A) LOAD CURRENT (A) Figure 2. Measured Supply Efficiency at 12V and 5V 50mV/DIV 10mV/DIV OUT_STEP 2A/DIV 1.5A DC 1 × 100µF/6.3V + 1 ×...
- Page 4 DEMO MANUAL DC2171A-A PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CAP., X5R, 2.2µF, 10V, 10%, 0603 TAIYO YUDEN, LMK107BJ225KA-T C3, C13 CAP., X5R, 22µF, 16V, 20%, 1206 TAIYO YUDEN, EMK316ABJ226ML-T CAP., X5R, 47µF, 6.3V, 20%,1206 TAIYO YUDEN, JMK316ABJ476ML CAP., X5R, 100µF, 6.3V, 20%,1206...
- Page 5 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.
- Page 6 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.
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