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DESCRIPTION
Demonstration circuit 1856A-B features the
µModule
regulator, a high performance, high efficiency
®
step-down regulator. The LTM4649EY has an operating
input voltage range of 4.5V to 16V and is able to provide
an output current of up to 10A. The output voltage is pro-
grammable from 0.6V to 5V and can be remotely sensed
with the internal differential remote sensing amplifier. The
LTM4649EY is a complete DC/DC point-of-load regulator in
a thermally enhanced 15mm × 9mm × 5.01mm BGA pack-
age requiring only a few input and output capacitors. Output
PERFORMANCE SUMMARY
PARAMETER
Input Voltage Range
Output Voltage V
OUT
Maximum Continuous Output Current
Default Operating Frequency
External Clock Synchronous Frequency Range
Efficiency
BOARD PHOTO
DEMO MANUAL DC1856A-B
LTM
4649EY
voltage tracking is available through the TRACK/SS pin for
®
supply rail sequencing. External clock synchronization is
also available through the CLKIN pin. The LTM4649 data
sheet must be read in conjunction with this demo manual
prior to working on or modifying demo circuit 1856A-B.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
(T
= 25°C)
A
CONDITIONS/NOTES
Jumper Selectable
Derating is Necessary for Certain Operating
Conditions. See Data Sheet for Details
V
= 12V, V
= 1.8V, I
= 10A
IN
OUT
OUT
10A Step-Down µModule
VALUE
4.5V to 16V
1.0VDC, 1.2VDC, 1.5VDC, 1.8VDC, 2.5VDC, 3.3VDC
10ADC
450kHz
250kHz to 780kHz
89% See Figure 2
LTM4649EY
Regulator
dc1856a-bf
1
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Related Manuals for Linear Technology LTM4649EY
Summary of Contents for Linear Technology LTM4649EY
- Page 1 LTM4649EY is a complete DC/DC point-of-load regulator in a thermally enhanced 15mm × 9mm × 5.01mm BGA pack- L, LT, LTC, LTM, µModule, Burst Mode, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their age requiring only a few input and output capacitors.
- Page 2 Demonstration circuit 1856A-B is an easy way to evaluate Output voltage ripple should be measured at J6 with a the performance of the LTM4649EY. Please refer to Figure 1 BNC cable and oscilloscope. for test setup connections and follow the procedure below.
-
Page 3: Quick Start Procedure
DEMO MANUAL DC1856A-B QUICK START PROCEDURE Figure 2. Measured Supply Efficiency at5V and 12V = 5A/DIV OUT STEP = 100mV/DIV CERAMIC AIRFLOW AMBIENT (ºC) Natural Convection 29.7 2 × 220µF/4V Ceramic Figure 3. Measured Load Transient Response Figure 4. Measured Thermal Capture (5A to 10A Load Step) dc1856a-bf... -
Page 4: Parts List
DEMO MANUAL DC1856A-B PARTS LIST ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components CO4, CO5 CAP , 100µF 20% 6.3V X5R 1210 AVX 12106D107MAT2A CAP , 22µF 20% 6.3V X5R 1210 AVX 12106D226MAT2A CIN1 CAP , 22µF 20% 16V X7R 1210 MURATA, GRM32ER71C226KE18L CIN3 CAP , 150µF 10% 25V OS-CON... -
Page 5: Schematic Diagram
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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