Product overview
Description
The L5981 is a step-down switching regulator with a 1.5 A (min.) current limited embedded Power MOSFET, so it is able to deliver in excess of 1 A DC current to the load depending on the application condition. The input voltage can range from 2.9 V to 18 V, while the output voltage can be set starting from 0.6 V to VIN. Having a minimum input voltage of 2.9 V, the device is suitable also for a 3.3 V bus.Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.
The VFQFPN8 package with an exposed pad allows reducing the RthJA down to approximately 60 °C/W.
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All features
- 1 A DC output current
- 2.9 V to 18 V input voltage
- Output voltage adjustable from 0.6 V
- 250 kHz switching frequency, programmable up to 1 MHz
- Internal soft-start and inhibit
- Low dropout operation: 100% duty cycle
- Voltage feedforward
- Zero load current operation
- Overcurrent and thermal protection
- VFQFPN8 3 mm x 3 mm package
Circuit Diagram
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Featured Videos
All resources
| Resource title | Version | Latest update |
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Product Specifications (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 7.0 | 19 Sep 2016 | 19 Sep 2016 |
Technical Notes & Articles (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 2.2 | 20 Jan 2020 | 20 Jan 2020 |
Design Notes & Tips (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.2 | 16 Jul 2019 | 16 Jul 2019 |
Brochures (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.1 | 03 Jun 2021 | 03 Jun 2021 |
EDA Symbols, Footprints and 3D Models
STMicroelectronics - L5981
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Symbols
Footprints
3D models
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHS Compliance Grade | Material Declaration** |
|---|---|---|---|---|---|
| L5981TR | Active | QFN-8L P 0.5 mm | 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.
Sample & Buy
| Part Number | Order from Distributors | Order from ST | Marketing Status | ECCN (US) | ECCN (EU) | Packing Type | Package | Temperature (°C) | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| min | max | |||||||||||
| L5981TR | 1 distributors | Free Sample Buy Direct | Active | EAR99 | NEC | Tape And Reel | QFN-8L P 0.5 mm | -40 | 150 | PHILIPPINES | 1.0098 / 1k | |
(*) Suggested Resale Price (USD) per defined quantity for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
