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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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Picture 产品型号 制造商 描述 
STEVAL-ISA069V1 -- 3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in DFN 3x3 package 
STEVAL-ISA070V1 -- 3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in SO-8 package 产品型号3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in DFN 3x3 package
3 A / 1.5 MHz step-down synchronous switching regulator based on the ST1S31 in SO-8 package
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| 产品型号 | 供货状态 | 封装 | 等级规格 | 符合RoHS级别 | Material Declaration** |
|---|---|---|---|---|---|
| ST1S31D-R | 批量生产 | SO-8 | 工业 | Ecopack2 | |
| ST1S31PUR | 批量生产 | VFDFPN 8 3x3x1.0 | 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.
