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Description
Demonstration circuit 1900A features the
µModule
regulator, a high-performance high-efficiency
®
quad output step-down regulator. The LTM4644EY has an
operating input voltage range of 4V to 14V and is able to
provide up to 4A of output current from each of its phases.
Each output's voltage is programmable from 0.6V to 5.5V.
The LTM4644EY is a DC/DC point of load regulator in a
9mm × 15mm × 5.01mm BGA package requiring only a
performance summary
PARAMETER
Input Voltage Range
Output Voltage V
OUT
Maximum Continuous Load Current per Output
Default Operating Frequency
Efficiency
BoarD photo
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DEMO MANUAL DC1900A
Quad 4A Output Step-Down
LTM
4644EY
few input and output capacitors. Output voltage tracking
®
is available through the TRACK/SS pin for supply rail se-
quencing. External clock synchronization is also available
through the CLKIN pin. The LTM4644 data sheet must be
read in conjunction with this demo manual prior to working
on or modifying demo circuit 1900A.
Design files for this circuit board are available at
http://www.linear.com/demo/DC1900A
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
Jumper Selectable
De-rating is necessary for certain operating conditions.
See data sheet for details
V
= 12V, V
= 3.3V, I
= 4A
IN
OUT1
OUT
µModule Regulator
= 25°C
A
VALUE
4V to 14V
V
= 3.3VDC, V
OUT1
V
= 1.5VDC, V
OUT3
4ADC
1MHz
89% See Figure 2
LTM4644EY
= 2.5VDC,
OUT2
= 1.2VDC
OUT4
dc1900af
1
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Related Manuals for Linear Technology DC1900A
Summary of Contents for Linear Technology DC1900A
- Page 1 9mm × 15mm × 5.01mm BGA package requiring only a http://www.linear.com/demo/DC1900A 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. performance summary Specifications are at T = 25°C...
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Page 2: Quick Start Procedure
(JP5-JP8) in the DCM Mode position. Note: Optional jumper positions are available on the DC1900A to allow for easy setup to evaluate parallel 2. Before connecting input supply, loads and meters, operation of the LTM4644. For example, to parallel all preset the input voltage supply to be between 4.5V to... - Page 3 DEMO MANUAL DC1900A Quick start proceDure 3.3V OUT1 2.5V OUT2 1.5V OUT3 1.2V OUT4 3.3V OUT1 2.5V OUT2 1.5V OUT3 1.2V OUT4 LOAD CURRENT (A) LOAD CURRENT (A) DC1900A F01a DC1900A F01b Figure 2. Measured Supply Efficiency at 5V and 12V...
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Page 4: Parts List
DEMO MANUAL DC1900A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER/PART NUMBER Required Circuit Components C1, C3 CAP, 1206, CER. 22µF 25V X5R 20% MURATA, GRM31CR61E226KE15L CAP, 0603, X5R, 1uF, 16V 10% AVX, 0603YD105KAT2A C9, C17, C28, C36 CAP, 1210 CER. 47µF 6.3V... -
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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