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

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.

pdf 下载
Data Brief

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 Ioutlower than 15 mA, to maintain the regulation with light loads
  • RoHS compliant

图案 资源


Technical Documentation

Product Specifications

描述 版本 大小
DB1132: 1.5 A / 3.3 V step-down DC-DC converter demonstration board based on the ST1S03
1.1 89 KB

Presentations & Training Material


描述 版本 大小
Evaluation board presentation
1.1 432 KB

Hardware Resources

Board Manufacturing Specification

描述 版本 大小
PCB layout
1.0 32 KB

Bill of Materials

描述 版本 大小
Bill of materials
1.0 45 KB

Schematic Pack

描述 版本 大小
Board schematic
1.0 39 KB

样品 & 购买

产品型号 Marketing StatusCore ProductOrder From STUnit Price (US$)*
@ 1
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STEVAL-ISA042V2ActiveST1S03PURBuy Direct46.55Distributor reported inventory date: 2015-05-21
Distributor NameRegionStockMin. order
Newark Element14Order NowAMERICA30

(*) 建议零售价格仅用于预算,以美元为单位,每。的报价,以当地货币计算的价格,请联系您当地的 ST 销售办事处 或我们的 分销商
(**) 材料声明表格上提供st.com可以是一般的文件,根据最常用的包,包内的家庭。出于这个原因,他们可能不是100%准确,对于一个特定的设备。请联系我们 销售支持 在特定设备上的信息。
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