4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40

The STEVAL-ISA084V1, based on the ST1S40, is an internally compensated 800 kHz fixed-frequency PWM synchronous step-down converter demonstration board.

The ST1S40 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to VIN (100% duty-cycle).

The ST1S40 integrates 95 mΩ high side switch and 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.

The peak current mode control with internal compensation delivers a very compact solution with a minimum component count.

The device is protected through cycle-by-cycle current limiting in case of overload and is also protected by current foldback function with frequency reduction in case of short-circuit

The device is available with an enable on/off function.

Key Features

  • Vin : 4 V to 18 V
  • Vout: 3.3 V
  • Maximum output current: 4 A
  • Switching frequency: 800 kHz
  • Short-circuit: protected
  • RoHS compliant

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设计

技术文档

产品规格
Description Version Size
DB1494 DB1494: 4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40 1.1 102 KB

硬件资源

Board Manufacturing Specifications
Description Version Size
STEVAL-ISA084V1 gerber files 4.1 143 KB
Bill of Materials
Description Version Size
STEVAL-ISA084V1 BOM 1.0 37 KB
Schematic Packs
Description Version Size
STEVAL-ISA084V1 schematics 1.0 49 KB

法律

许可协议
Description Version Size
Evaluation products license agreement 1.0 125 KB
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
STEVAL-ISA084V1 ST1S40IDR Active 30.63 1 NEC EAR99 ITALY MORE INFO 直接购买 Add to cart DISTRIBUTOR AVAILABILITY
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(*) 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**
STEVAL-ISA084V1 ActiveCARDIndustrialEcopack2
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(**) 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.

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