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4A Monolithic synchronous step-down converter with high efficiency at light load
Download Datasheet
The ST1S50 device is a 500 kHz fixed frequency PWM synchronous step-down regulator. The ST1S50 operates from 4.0 V to 18 V input, while it regulates an output voltage as low as 0.8 V and up to 0.88 x VIN.
The ST1S50 device integrates a 95 mΩ high-side switch and a 69 mΩ synchronous rectifier allowing very high efficiency with very low output voltages.
The peak current mode control with a special PFM mode enables high efficiency at a light load.
The ST1S50 device is available in a VFDFPN10 3 x 3 x 1 mm - 10 leads package.
Key Features
- 4 A output current
- 4.0 V to 18 V input voltage
- Output voltage adjustable from 0.8 V to 0.88 x VIN
- 500 kHz switching frequency
- High efficiency at light load
- Programmable soft-start and enable
- Integrated 95 mΩ and 69 mΩ power MOSFETs
- All ceramic capacitor
- Power Good
- Cycle-by-cycle current limiting
- Short-circuit protection
- VFDFPN10 3 x 3 x 1 mm - 10 L
Resources
Technical Documentation
| Description | Version | Size | |
|---|---|---|---|
|
DS10105: 4 A monolithic synchronous step-down switching converter with high efficiency at light load | 4.0 | 701 KB |
Publications and Collaterals
| Description | Version | Size | |
|---|---|---|---|
|
|
Brochure Power management guide | 09.2017 | 3 MB |
|
|
Electric vehicle (EV) ecosystem | 1.1 | 1 MB |
Tools and Software
| Part Number | Manufacturer | Description |
|---|---|---|
| STEVAL-ISA146V1 | 4 A step-down switching evaluation board based on the ST1S50 |
Sample & Buy
| Part Number | Package | Packing Type | Marketing Status | Unit Price (US$) * | Quantity | ECCN (US) | Country of Origin | More info | Order from ST | Order from Distributors |
|---|---|---|---|---|---|---|---|---|---|---|
| ST1S50PUR | DFN10 3X3 | Tape And Reel | Active : Product is in volume production | 0.788 | 1000 | EAR99 | - | MORE INFO | Get Sample Add to cart | DISTRIBUTOR AVAILABILITY |
(*) 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
Quality & Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| ST1S50PUR | Active | DFN10 3X3 | Industrial | 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.
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MORE INFO
No availability reported, please contact our Sales office
Active: In Production.
| Distributor Name | Region | Stock | Min. Order |
|---|
Distributor reported inventory date: