ST STEVAL-L6982NDR User Manual
  1. Manuals
  2. Brands
  3. ST Manuals
  4. Microcontrollers
  5. STEVAL-L6982NDR
  6. User manual
ST STEVAL-L6982NDR User Manual

ST STEVAL-L6982NDR User Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Getting started with the STEVAL-L6982NDR synchronous step-down switching
Introduction
The
STEVAL-L6982NDR
evaluation board is based on the
delivering up to 2 A DC to the load.
Its wide input voltage range makes the device suitable for a broad range of applications.
The device implements peak current mode architecture in a SO 8L package with internal compensation to minimize design
complexity and size.
The
L6982
is available both in low consumption mode (LCM) and low noise mode (LNM) versions.
LCM maximizes efficiency at light-load with controlled output voltage ripple, which is ideal for battery-powered applications.
LNM makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the
specification for noise sensitive applications.
The EN pin provides enable/disable function. The typical shutdown current is 2 μA when disabled.
When the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft start takes place.
Pulse-by-pulse current sensing on both power elements implements effective constant current protection and thermal shutdown
prevents thermal run-away.
Figure 1.
UM2935 - Rev 1 - September 2021
For further information contact your local STMicroelectronics sales office.
regulator evaluation board based on the L6982NDR
L6982NDR
STEVAL-L6982NDR evaluation board (top and bottom views)
synchronous monolithic step-down regulator capable of
UM2935
User manual
www.st.com

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the STEVAL-L6982NDR and is the answer not in the manual?

Questions and answers

Related Manuals for ST STEVAL-L6982NDR

Summary of Contents for ST STEVAL-L6982NDR

  • Page 1: Figure 1. Steval-L6982Ndr Evaluation Board (Top And Bottom Views)

    UM2935 User manual Getting started with the STEVAL-L6982NDR synchronous step-down switching regulator evaluation board based on the L6982NDR Introduction STEVAL-L6982NDR evaluation board is based on the L6982NDR synchronous monolithic step-down regulator capable of delivering up to 2 A DC to the load.

  • Page 2: Getting Started

    Overvoltage protection • Output voltage sequencing • Thermal protection • SO 8L package • Synchronization to external clock for LNM devices Block diagram Figure 2. STEVAL-L6982NDR functional block diagram DC Input Input Output Switching LOAD filter filter regulator filter Enable...

  • Page 3: Connectors And Test Points

    1.6.1 eDesignSuite eDesignSuite software tool developed by STMicroelectronics helps you configure ST products for power conversion applications. You can use it to customize your board for a specific application. After entering the main specifications for your design, you can generate an automatic design or follow a sequential process to build a highly customized design.

  • Page 4: How To Use The Board

    UM2935 How to use the board How to use the board STEVAL-L6982NDR is configured with L6982 LNM with adjustable V . It is set to deliver a 5 V output voltage with F = 400 KHz. This board is best suited for applications where low output ripple is preferred to high efficiency at low current.

  • Page 5: Pcb Layout

    UM2935 PCB layout PCB layout Figure 3. STEVAL-L6982NDR evaluation board - PCB layout (top layer) Figure 4. STEVAL-L6982NDR evaluation board - PCB layout (bottom layer) UM2935 - Rev 1 page 5/15...

  • Page 6: Schematic Diagrams

    Schematic diagrams Figure 5. STEVAL-L6982NDR circuit schematic n.m. L1 33uH VOUT n.m. n.m. 22uF 10uF 10uF PGND VIN_L6982 BOOT CLK_IN 100nF 0 Ohm n.m. AGND 10uF EN/SY NC 1uF 10V L6982NDR n.m. 402K VIN_L6982 4.7uH MPZ2012S221A 82.5K 4.7uF n.m. 4.7uF 4.7uF...

  • Page 7: Bill Of Materials

    UM2935 Bill of materials Bill of materials Table 1. STEVAL-L6982NDR bill of materials Item Q.ty Ref. Part/Value Description Manufacturer Order code 10µF, 1206(3216 Input capacitor C3216X7R1H106K160AC Metric), 50V, +/-10% 1µF, 0805(2012 metric), 50V, Input capacitor CGA4J3X7R1H105K125AB +/-10% 1µF, 0603 (1608...
  • Page 8 CLKIN 1.3mm Test point Ettinger 13.14.240 VIN 1.3mm Test point Ettinger 13.14.241 GND 1.3mm Test point Ettinger 13.14.242 GND 1.3mm Test point Ettinger 13.14.243 VOUT 1.3mm Test point Ettinger 13.14.244 DCDC converter ST L6982NDR UM2935 - Rev 1 page 8/15...

  • Page 9: Board Versions

    UM2935 Board versions Board versions Table 2. STEVAL-L6982NDR versions Finished good Schematic diagrams Bill of materials STEVAL$L6982NDRA STEVAL$L6982NDRA schematic diagrams STEVAL$L6982NDRA bill of materials 1. This code identifies the STEVAL-L6982NDR evaluation board first version. UM2935 - Rev 1 page 9/15...

  • Page 10: Regulatory Compliance

    UM2935 Regulatory compliance Regulatory compliance Formal Notice Required by the U.S. Federal Communications Commission FCC NOTICE: This kit is designed to allow: (1) Product developers to evaluate electronic components, circuitry, or software associated with the kit to determine whether to incorporate such items in a finished product and (2) Software developers to write software applications for use with the end product.

  • Page 11: Revision History

    UM2935 Revision history Table 3. Document revision history Date Revision Changes 14-Sep-2021 Initial release. UM2935 - Rev 1 page 11/15...

  • Page 12: Table Of Contents

    UM2935 Contents Contents Getting started ..............2 Safety precautions .

  • Page 13: List Of Tables

    STEVAL-L6982NDR bill of materials........

  • Page 14: List Of Figures

    STEVAL-L6982NDR evaluation board - PCB layout (bottom layer) ....... .
  • Page 15 ST’s terms and conditions of sale in place at the time of order acknowledgement. Purchasers are solely responsible for the choice, selection, and use of ST products and ST assumes no liability for application assistance or the design of Purchasers’...

Table of Contents