1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03

The STEVAL-ISA042V2 demonstration board is a step-down DC-DC converter optimized for powering the low-voltage digital core in HDD applications and, more generally, replacing the high-current linear solution when the power dissipation may cause excessive heating of the application environment. It provides up to 1.5 A over an input voltage range of 3 V to 16 V.

A high switching frequency (1.5 MHz) allows the use of tiny surface-mounted components, as well as the use of a resistor divider to set the output voltage value. Only an inductor, a Schottky diode, and two capacitors are required. In addition, a low output ripple is guaranteed by the current-mode PWM topology and by the use of low ESR SMD ceramic capacitors. The device is thermal protected and current limited to prevent damage due to accidental short-circuits.

It uses the ST1S03 device.

The ST1S03 is available in a DFN6 (3x3mm) package.

Key Features

  • Adjustable current-mode PWM step-down DC-DC converter
  • Output voltage, Vout : 3.3 V
  • Output current, Iout : 1.5 A
  • Internal compensation to eliminate additional components
  • Pulse skipping for Iout lower than 15 mA, to maintain the regulation with light loads
  • RoHS compliant

デザイン

ハードウェアリソース

Board Manufacturing Specifications
Description バージョン サイズ
PCB layout 1.0 31 KB
Bill of Materials
Description バージョン サイズ
Bill of materials 1.0 45 KB

プレゼンテーション & トレーニング資料

プレゼンテーション
Description バージョン サイズ
Evaluation board presentation 1.1 431 KB

技術文書

製品スペック
Description バージョン サイズ
DB1132 DB1132: 1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03 1.1 89 KB
サポート & コミュニティ

サンプル & 購入

製品型番 Core Product Marketing Status Unit Price (US$) * 数量 ECCN (EU) ECCN (US) Country of Origin More info Order from ST Order from Distributors
STEVAL-ISA042V2 ST1S03PUR Active 30.63 1 NEC EAR99 ITALY MORE INFO 直接購入 買い物かごに追加 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

品質 & 信頼性

製品型番 Marketing Status パッケージ Grade RoHS Compliance Grade Material Declaration**
STEVAL-ISA042V2 アクティブCARDIndustrialEcopack2
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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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