Product overview
Description
The STEVAL-L6981NDR is based on the L6981NDR synchronous monolithic step-down regulator delivering up to 1.5 A DC.
Its wide input voltage range makes the solution suitable for a broad range of applications.
The device implements peak current mode architecture in a SO 8L package with internal compensation to minimize design complexity and size.
The L6981 is available in low consumption mode (LCM) and low noise mode (LNM) versions.
LCM maximizes efficiency at light-load with controlled output voltage ripple, making the device extremely suitable for battery-powered applications.
LNM makes the switching frequency constant and minimizes the output voltage ripple overload current range, meeting the specification for noise sensitive applications.
The EN pin manages the enable/disable function. The typical shutdown current is 2 μA when disabled. When the EN pin is pulled up, the device is enabled and the internal 1.3 ms soft-start takes place.
Pulse-by-pulse current sensing on both power elements implements effective constant current protection while thermal shutdown prevents thermal run-away.
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All features
- 3.5 V to 38 V operating input voltage
- Output voltage from 0.85 V to VIN
- 3.3 V and 5 V fixed output voltage versions
- 1.5 A DC output current
- 17 μA operating quiescent current (fixed Vout part numbers)
- Internal compensation network
- Low noise mode version for noise sensitive applications
- 2 μA shutdown current
- Internal soft-start
- Enable function
- Overvoltage protection
- Output voltage sequencing
- Thermal protection
- SO-8 package
- Synchronization with external clock for LNM devices
Featured Videos
Design and simulate L6983 buck converter operation with eDSim
Getting started with eDSim for accurate simulation of your circuit design
All resources
| Resource title | Version | Latest update |
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Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| ZIP | 1.0 | 19 Feb 2021 | 19 Feb 2021 |
Bill of Materials (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 18 Feb 2021 | 18 Feb 2021 |
Schematic Pack (1)
| Resource title | Version | Latest update | ||
|---|---|---|---|---|
| 1.0 | 18 Feb 2021 | 18 Feb 2021 |
Quality and Reliability
| Part Number | RoHS Compliance Grade | Grade | Material Declaration** |
|---|---|---|---|
| STEVAL-L6981NDR | Ecopack2 | Industrial | |
STEVAL-L6981NDR
Package:
IndustrialMaterial Declaration**:
(**) 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 | Marketing Status | Budgetary Price (US$)*/Qty | Order from ST | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Supplier | Core Product | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-L6981NDR | | | distributors No availability of distributors reported, please contact our sales office |
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STEVAL-L6981NDR Active
(*) 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