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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
样片和购买
| 产品型号 | 封装 | 包装类型 | 供货状态 | 预算价格(US$) | 数量 | ECCN (US) | Country of Origin | 从分销商订购 | 从ST订购 |
|---|---|---|---|---|---|---|---|---|---|
| ST1S09IPUR | DFN6 3x3 | Tape And Reel |
Active
|
0.625 | 10000 | EAR99 | PHILIPPINES | 查看供货情况 | 立即购买 |
| ST1S09PUR | DFN6 3x3 | Tape And Reel |
Active
|
0.713 | 10000 | EAR99 | PHILIPPINES | 查看供货情况 | 立即购买 |
(*) 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
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Picture 产品型号 制造商 描述 
STEVAL-ISA045V2 -- 2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09 
STEVAL-ISA046V2 -- 2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09I with inhibit 产品型号2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09
2 A / 3.3 V high-efficiency synchronous buck converter evaluation board based on the ST1S09I with inhibit
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| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| ST1S09IPUR |
Active
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DFN6 3x3 | 工业 | Ecopack2 | |
| ST1S09PUR |
Active
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DFN6 3x3 | 工业 | Ecopack2 |
(**) 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.
