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Linear Technology DC1498A Demo Manual
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Linear Technology DC1498A Demo Manual

Ltm4620ev high efficiency, dual 13a step-down power µmodule regulator
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Description
DC1498A features the LTM
high density, dual 13A, switch mode step-down power
module regulator. The input voltage is from 4.5V to 16V.
The output voltage is programmable from 0.6V to 2.5V.
DC1498A can deliver nominal 12A output current and
up to 13A maximum in each channel. As explained in
the data sheet, output current derating is necessary for
certain V
, V
, and thermal conditions. The board
IN
OUT
operates in continuous conduction mode in heavy load
conditions. For high efficiency at low load currents, the
MODE jumper (JP1) selects pulse-skipping mode for noise
sensitive applications or Burst-Mode
noise sensitive applications. Two outputs can be connected
in parallel for a single 26A output solution with optional
jumper resistors. The board allows the user to program
BoarD photo
High Efficiency, Dual 13A Step-Down
4620EV, the high efficiency,
®
operation in less
®
DEMO MANUAL DC1498A
Power µModule Regulator
how its output ramps up and down through the TRACK/SS
pin. The output can be set up to either coincidentally or
ratiometrically track with another supply's output. Remote
output voltage sensing is available for improved output
voltage regulation at the load point. These features and
the availability of the LTM4620EV in a compact 15mm ×
15mm × 4.41mm LGA package make it ideal for use in
many high-density point-of-load regulation applications.
The LTM4620 data sheet must be read in conjunction
with this demo manual prior to working on or modifying
DC1498A.
Design files for this circuit board are available at
http://www.linear.com/demo
L, LT, LTC, LTM, µModule, Linear Technology, the Linear logo and µModule are registered
trademarks of Linear Technology Corporation. All other trademarks are the property of their
respective owners.
LTM4620EV
dc1498afa
1

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Summary of Contents for Linear Technology DC1498A

  • Page 1 26A output solution with optional L, LT, LTC, LTM, µModule, Linear Technology, the Linear logo and µModule are registered jumper resistors. The board allows the user to program trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.

  • Page 2: Performance Summary

    DC1780A-A DC1780A-B DC1780A-C DC1498A is easy to set up to evaluate the performance 4. Once the proper output voltage is established, adjust the of the LTM4620EV. Please refer to Figure 1 for proper load within the operating range and observe the output...
  • Page 3 8. (Optional) LTM4620 can be configured for a 2-phase CLKIN test point. single output at up to 26A on DC1498A. Install 0Ω 7. (Optional) The outputs of LTM4620 can track another resistors on R14, R17, R28, R39 and remove R7, R19.
  • Page 4 DEMO MANUAL DC1498A Quick start proceDure = 5V = 5V = 9V = 9V = 12V = 12V = 15V = 15V LOAD CURRENT (A) LOAD CURRENT (A) DC1498A F02 DC1498A F03 Figure 2. Measured Efficiency on Channel 1. Figure 3. Measured Efficiency on Channel 2 = 1.5V, f...
  • Page 5 DEMO MANUAL DC1498A Quick start proceDure Figure 7. Thermal Capture at 5V , 1.5V at 12A and 1.2V at 12A. Ambient Temperature = 30°C, No Airflow and No Heat Sink Figure 8. Thermal Capture at 5V , 1.5V at 13A and 1.2V at 13A.
  • Page 6 DEMO MANUAL DC1498A Quick start proceDure Figure 9. Thermal Capture at 12V , 1.5V at 12A and 1.2V at 12A. Ambient Temperature = 30°C, No Airflow and No Heat Sink Figure 10. Thermal Capture at 12V , 1.5V at 13A and 1.2V at 13A.

  • Page 7: Parts List

    DEMO MANUAL DC1498A parts List ITEM REFERENCE PART DESCRIPTION MANUFACTURER, PART NUMBER Required Circuit Components CIN2, CIN3, CIN4, CIN5 Capacitor, X5R, 22µF , 25V, 10%,1210 Murata, GRM32ER61E226KE15 COUT1, COUT7 Capacitor, 470µF , 4V, POSCAP , F8 Sanyo, 4TPE470MCL COUT4, COUT5 Capacitor, X5R, 100µF , 6.3V, 20% 1210...
  • Page 8 DEMO MANUAL DC1498A schematic Diagrams dc1498afa...

  • Page 9: Schematic Diagrams

    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 10 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.
  • Page 11 Mouser Electronics Authorized Distributor Click to View Pricing, Inventory, Delivery & Lifecycle Information: Analog Devices Inc. DC1498A...