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The ST1S31 device is an internally compensated 1.5 MHz fixed-frequency PWM synchronous step-down regulator. The ST1S31 operates from 2.8 V to 5.5 V input, while it regulates an output voltage as low as 0.8 V and up to VIN.
The ST1S31 integrates a 60 mΩ high-side switch and a 45 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 ST1S31 device is available in 3 mm x 3 mm, 8 lead VFDFPN and SO8 packages.主要特性
- 3 A DC output current
- 2.8 V to 5.5 V input voltage
- Output voltage adjustable from 0.8 V
- 1.5 MHz switching frequency
- Internal soft-start and enable
- Integrated 60 mΩ and 45 mΩ power MOSFETs
- All ceramic capacitor
- Power Good (POR)
- Cycle-by-cycle current limiting
- Current foldback short-circuit protection
- VFDFPN 3 x 3 - 8L, SO8 packages
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评估工具
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图片 产品型号 制造商 描述 
STEVAL-ISA069V1 -- 基于ST1S31的3 A / 1.5 MHz同步降压开关稳压器，DFN 3x3封装 
STEVAL-ISA070V1 -- 基于ST1S31的3 A / 1.5 MHz同步降压开关稳压器，SO-8封装 产品型号基于ST1S31的3 A / 1.5 MHz同步降压开关稳压器，DFN 3x3封装
基于ST1S31的3 A / 1.5 MHz同步降压开关稳压器，SO-8封装
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质量与可靠性
| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| ST1S31D-R | NRND | SO-8 | Industrial | Ecopack2 | |
| ST1S31PUR | 批量生产 | VFDFPN 8 3x3x1.0 | 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 。
eDesignSuite
样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 封装 | 包装类型 | 供货状态 | ECCN (US) | Country of Origin | Budgetary Price (US$)*/Qty | |
|---|---|---|---|---|---|---|---|---|---|
| ST1S31D-R | 2 distributors | 立即购买 | SO-8 | Tape And Reel | NRND | EAR99 | CHINA | 0.471 / 1k | |
| ST1S31PUR | 4 distributors | 获取样片 | VFDFPN 8 3x3x1.0 | Tape And Reel | 批量生产 | EAR99 | MALAYSIA | 0.535 / 1k |
