L5980, 0.7 A step-down switching regulator, evaluation board

The EVAL5980 demonstration board provides the design engineer with a fully functional step-down switching regulator with an output current of up to 0.7 A. The L5980 integrates STMicroelectronics step-down switching regulator, together with all the external components required for a typical application.

The rated voltage of the input capacitor and the Schottky diode rectifier repetitive peak reverse voltage are both 25 V, making the board capable of covering the entire 2.9 V - 18 V input voltage range of the L5980 device.

The board features an external resistor divider (R1 and R2) designed for an output voltage of 3.3 V.

The output voltage can be set to a level from 0.6 V up to the rated voltage of the output capacitor (16 V).

The compensation network on the demonstration board allows the use of MLCC as output filter to keep the loop stable. The inductor saturation current and forward current of the Schottky diode are within the current limit values.

The switching frequency on the demonstration board is set to 500 kHz by means of the R5 resistor connected to pin Fsw.

Key Features

  • Zero-load current operation
  • Low dropout operation: 100 % duty cycle
  • VFQFPN8 3 mm x 3 mm package
  • 0.7 A DC output current
  • Output voltage adjustable from 0.6 V to 16 V
  • 2.9 V to 18 V input voltage
  • Internal soft-start and inhibit
  • Over-current and thermal protection
  • 250 kHz switching frequency, programmable up to 1 MHz

设计

技术文档

产品规格
Description Version Size
DB0783 DB0783: 0.7 A step-down switching regulator demonstration board based on the L5980 1.1 281 KB

法律

许可协议
Description Version Size
Evaluation products license agreement 1.0 125 KB

工具和软件

评估工具
解决方案评估工具
支持和社区

样片和购买

型号 Core Product Marketing Status Unit Price (US$) * Quantity ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
EVAL5980 L5980 Active - - NEC EAR99 - MORE INFO
test

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office  or our Distributors

质量和可靠性

型号 Marketing Status Package Grade RoHS Compliance Grade Material Declaration**
EVAL5980 ActiveCARDIndustrialNot compliant
test

(**) The Material Declaration forms available on st.com may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.

×