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Description
Demonstration circuit 1889A features the
µModule
regulator, a tiny high performance high
®
efficiency step-down regulator. The LTM4624EY has an
operating input voltage range of 4V to 14V and is able to
provide an output current of up to 4A. The output voltage
is programmable from 0.6V to 5.5V. The LTM4624EY is
a complete DC/DC point-of-load regulator in a thermally
enhanced 6.25mm × 6.25mm × 5.01mm BGA package
requiring only a couple capacitors and a resistor. Output
performance summary
PARAMETER
Input Voltage Range
Output Voltage, V
OUT
Maximum Continuous Output Current
Default Operating Frequency
Efficiency
BoarD photo
DEMO MANUAL DC1889A
LTM
4624EY
voltage tracking is available through the TRACK/SS pin for
®
supply rail sequencing. The LTM4624 data sheet must be
read in conjunction with this demo manual prior to working
on or modifying demo circuit 1889A.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
Specifications are at T
CONDITIONS/NOTES
Jumper Selectable
Derating is Necessary for Certain operating
Conditions. See Data Sheet for Details
V
= 12V, V
= 1.8V, I
= 4A
IN
OUT
OUT
4A Step-Down µModule
= 25°C
A
VALUE
4V – 14V
1.0V
, 1.2V
, 1.5V
DC
DC
5V
DC
4A DC
1MHz
83.6% See Figure 2
LTM4624EY
Regulator
, 1.8V
, 2.5V
, 3.3V
,
DC
DC
DC
DC
dc1889af
1
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Related Manuals for Linear Technology DC1889A
Summary of Contents for Linear Technology DC1889A
- Page 1 DC/DC point-of-load regulator in a thermally enhanced 6.25mm × 6.25mm × 5.01mm BGA package L, LT, LTC, LTM, Linear Technology, the Linear logo and µModule are registered trademarks of requiring only a couple capacitors and a resistor. Output Linear Technology Corporation.
-
Page 2: Quick Start Procedure
DEMO MANUAL DC1889A Quick start proceDure Demonstration circuit 1889A is an easy way to evaluate the 5. Once the proper output voltage is established, adjust performance of the LTM4624EY. Please refer to Figure 1 the load current within the 0A to 4A range and observe for test setup connections and follow the procedure below. - Page 3 DEMO MANUAL DC1889A Quick start proceDure CCM Efficiency vs Load Current CCM Efficiency vs Load Current 3.3V 3.3V 2.5V 2.5V 1.8V 1.8V 1.5V 1.5V 1.2V 1.2V LOAD CURRENT (A) LOAD CURRENT (A) Figure 2. Measured Supply Efficiency at 12V and 5V...
-
Page 4: Parts List
DEMO MANUAL DC1889A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER CAP., X5R, 2.2µF, 10V, 10%, 0603 TAIYO YUDEN, LMK107BJ225KA-T C3, C13 CAP., X5R, 22µF, 16V, 20%, 1206 TAIYO YUDEN, EMK316BJ226ML-T CAP., X5R, 47µF, 6.3V, 20%,1206 TAIYO YUDEN, JMK316BJ476ML CAP., X5R, 100µF, 6.3V, 20%,1210... -
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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