Analog Devices EVAL-ADP2311 User Manual
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Analog Devices EVAL-ADP2311 User Manual

Analog Devices EVAL-ADP2311 User Manual

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One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com
Evaluation Board for the ADP2311, Dual, 1 A, 18 V Synchronous Step-Down

FEATURES

Input voltage: 4.5 V to 18 V
±1.0% output accuracy
Integrated MOSFET: 110 mΩ/60 mΩ typical
Continuous output current: 1 A/1 A
Power fail comparator generates warning
Power-on reset with programmable delay timer
Adjustable voltage monitor for power-down
Watchdog refresh input
Dual phase with 180° out of phase operation
Fixed switching frequency: 300 kHz
Internal compensation and soft start
Stable with low effective series resistance (ESR) output
ceramic capacitors
Precision enable input
Power feedback during power off
Undervoltage lockout (UVLO), overcurrent protection (OCP),
overvoltage protection (OVP), and thermal shutdown (TSD)
PLEASE SEE THE LAST PAGE FOR AN IMPORTANT
WARNING AND LEGAL TERMS AND CONDITIONS.
Regulator with Fail-Safe Voltage Monitoring
ADP2311
EVAL-ADP2311 User Guide

GENERAL DESCRIPTION

The
ADP2311
evaluation board is a complete, dual, 1 A step-down
regulator solution that allows users to evaluate the performance of
the
ADP2311
with a near ideal printed circuit board (PCB) layout.
The outputs of the
and 3.3 V for Channel 1 and Channel 2, respectively. The VIN
threshold of the power fail input is set at 8.99 V. Different
output and power fail input voltages can be achieved by
changing the appropriate passive components.
Full details on the
ADP2311
data sheet, available from Analog Devices, Inc., which
should be consulted in conjunction with this user guide.
EVALUATION BOARD
Figure 1.
Rev. 0 | Page 1 of 8
ADP2311
evaluation board are preset to 1.2 V
ADP2311
dual regulator are provided in the
UG-653

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Summary of Contents for Analog Devices EVAL-ADP2311

  • Page 1: Features

    Fixed switching frequency: 300 kHz ADP2311 data sheet, available from Analog Devices, Inc., which Internal compensation and soft start should be consulted in conjunction with this user guide. Stable with low effective series resistance (ESR) output...

  • Page 2: Table Of Contents

    UG-653 EVAL-ADP2311 User Guide TABLE OF CONTENTS     Features ....................1 Evaluation Board Schematic and Artwork ........5     General Description ................. 1 ADP2311 Evaluation Board Schematic ........5     ADP2311 Evaluation Board ............1 PCB Layout ..................6  ...

  • Page 3: Using The Evaluation Board

    EVAL-ADP2311 User Guide UG-653 USING THE EVALUATION BOARD POWERING UP THE EVALUATION BOARD Turning On the Evaluation Board When the power source and load are connected to the evaluation ADP2311 evaluation board is supplied fully assembled and board, it can be powered for operation.

  • Page 4: Modifying The Evaluation Board

    UG-653 EVAL-ADP2311 User Guide Measuring Output Voltage Ripple To limit the output voltage accuracy degradation due to the FBx bias current (0.1 µA maximum) to less than 0.5% (maximum), To observe the output voltage ripple, place the oscilloscope probe ensure that the bottom divider string resistors, R2 and R8, is less across the output capacitor with the probe ground lead connected than 30 kΩ.

  • Page 5: Evaluation Board Schematic And Artwork

    EVAL-ADP2311 User Guide UG-653 EVALUATION BOARD SCHEMATIC AND ARTWORK ADP2311 EVALUATION BOARD SCHEMATIC 0.1uF BST1 VIN_S VOUT1_S 15uH PVIN1 VOUT1 PGND2 PGND1 ADP2311 GND1_S PVIN2 0.1uF GND_S BST2 499k 499k VOUT2_S 22uH VOUT2 PGND4 VREG PGND3 VREG 68.1k 35.7k GND2_S VREG 2.21k...

  • Page 6: Pcb Layout

    UG-653 EVAL-ADP2311 User Guide PCB LAYOUT Figure 4. ADP2311 Evaluation Board Layer 1, Component Side Figure 5. ADP2311 Evaluation Board Layer 2, Ground Plane Rev. 0 | Page 6 of 8...

  • Page 7: Figure

    EVAL-ADP2311 User Guide UG-653 Figure 6. ADP2311 Evaluation Board Layer 3, Power Plane Figure 7. ADP2311 Evaluation Board Layer 4, Bottom Side Rev. 0 | Page 7 of 8...

  • Page 8: Ordering Information

    By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement.

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