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The ST1S09 is a step-down DC-DC converter optimized for powering low output voltage applications. It supplies a current in excess of 2 A over an input voltage range from 2.7 V to 6 V.
A high PWM switching frequency (1.5 MHz) allows the use of tiny surface-mount components.
Moreover, since the required synchronous rectifier is integrated, the number of the external components is reduced to minimum: a resistor divider, an inductor and two capacitors. The Power Good function continuously monitors the output voltage. An open drain Power Good flag is released when the output voltage is within regulation. 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 thermally protected and the output current limited to prevent damages due to accidental short circuit. The ST1S09 is available in the DFN6 (3 x 3 mm) package.主要特性
- Operating junction temp. -30 °C to 125 °C
- Utilizes tiny capacitors and inductors
- Available in DFN6 (3 x 3 mm) exposed pad
- Non switching quiescent current: (typ) 1.5 mA over temperature range
- Integrated output over-voltage protection
- 1.5 MHz fixed frequency PWM with current control mode
- Typical efficiency: > 90%
- 2 A output current capability
- Two versions available: power good or inhibit
- RDSON (typ) 100 mΩ
- 2 % DC output voltage tolerance
精选 视频
评估工具
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图片 产品型号 制造商 描述 
STEVAL-ISA045V2 -- 基于ST1S09的2 A / 3.3 V高效同步降压转换器评估板 
STEVAL-ISA046V2 -- 基于ST1S09I的2 A / 3.3 V高效同步降压转换器评估板，具有抑制功能 产品型号基于ST1S09的2 A / 3.3 V高效同步降压转换器评估板
基于ST1S09I的2 A / 3.3 V高效同步降压转换器评估板，具有抑制功能
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质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| ST1S09IPUR |
批量生产
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DFN6 3x3 | 工业 | Ecopack2 | |
| ST1S09PUR |
批量生产
|
DFN6 3x3 | 工业 | Ecopack2 |
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持 。
eDesignSuite
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| ST1S09IPUR | 4 distributors | 立即购买 |
批量生产
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EAR99 | NEC | Tape And Reel | DFN6 3x3 | -30 | 125 | PHILIPPINES | 0.625 / 1k | |
| ST1S09PUR | 3 distributors | 立即购买 |
批量生产
|
EAR99 | NEC | Tape And Reel | DFN6 3x3 | -30 | 125 | PHILIPPINES | 0.713 / 1k | |
