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The ST1S40 device is an internally compensated 850 kHz fixed-frequency PWM synchronous step-down regulator. 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.
The ST1S40 integrates a 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 ST1S40 is available in HSOP-8, VFQFPN 4 mm x 4 mm - 8 lead, and standard SO8 package.主要特性
- 3 A DC output current
- 4.0 V to 18 V input voltage
- Output voltage adjustable from 0.8 V
- 850 kHz switching frequency
- Internal soft-start
- Integrated 95 mΩ and 69 mΩ Power MOSFETs
- All ceramic capacitor
- Enable
- Cycle-by-cycle current limiting
- Current fold back short-circuit protection
- Available in HSOP-8, VFQFPN4x4-8L, and SO8 packages
样片和购买
| 产品型号 | 封装 | 包装类型 | 供货状态 | ECCN (US) | Country of Origin | Approximate Price (US$)* / Qty | 从ST订购 | 从分销商订购 |
|---|---|---|---|---|---|---|---|---|
| ST1S40IPHR | PowerSO-8 | Tape And Reel | 批量生产 | EAR99 | PHILIPPINES | 0.76 / 1k | 获取样片 | 查看供货情况 |
| ST1S40IDR | SO-8 | Tape And Reel | 批量生产 | EAR99 | CHINA | 0.68 / 1k | 获取样片 | 查看供货情况 |
| ST1S40IPUR | DFN8 4x4 | Tape And Reel | 批量生产 | EAR99 | MALAYSIA | 0.798 / 1k | 获取样片 | 查看供货情况 |
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图片 产品型号 制造商 描述 
STEVAL-ISA084V1 -- 4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40 产品型号4 A peak, 800 kHz fixed-frequency PWM synchronous step-down demonstration board with enable on/off based on the ST1S40
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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** |
|---|---|---|---|---|---|
| ST1S40IDR | 批量生产 | SO-8 | Industrial | Ecopack2 | |
| ST1S40IPHR | 批量生产 | PowerSO-8 | Industrial | Ecopack2 | |
| ST1S40IPUR | 批量生产 | DFN8 4x4 | Industrial | 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 。
