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.
Key Features
| Description | Version | Size |
|---|---|---|
| DS8977: 3 A DC step-down switching regulator | 4.0 | 1 MB |
| Description | Version | Size |
|---|---|---|
| Brochure Power management guide | 05.2016 | 4 MB |
| Part Number | Manufacturer | Description |
|---|---|---|
| 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 |
| Part Number | Package | Packing Type | Unit Price (US$) * | Quantity | ECCN (EU) | ECCN (US) | Country of Origin |
|---|---|---|---|---|---|---|---|
| ST1S31D-R | SO-8 | Tape And Reel | 0.471 | 1000 | NEC | EAR99 | CHINA |
| ST1S31PUR | VFDFPN 8 3x3x1.0 | Tape And Reel | 0.535 | 1000 | NEC | EAR99 | MALAYSIA |
| Part Number | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|
| ST1S31D-R | SO-8 | Industrial | Ecopack2 | |
| ST1S31PUR | VFDFPN 8 3x3x1.0 | Industrial | Ecopack2 | md__59_vfdfpn-wspc-8-wspc-3x3_my59ua17aa5.pdf md__59_vfdfpn-wspc-8-wspc-3x3_my59ua17aa5.xml |
