Product overview
概要
The STEVAL-L7983ADJ step-down switching power supply evaluation board is based on the L7983PUR regulator in an DFN10 3x3 mm package with 12 V set output voltage. The selected switching frequency is 1 MHz and it can be adjusted by applying an external clock on the LNM/LCM pin or by changing the frequency programming resistor.
The step-down monolithic switching regulator can deliver up to 300 mA DC based on peak current mode architecture. The wide input voltage range and adjustable UVLO threshold meet the specification for 12 V, 24 V and 48 V industrial bus standards.
L7983 supports dynamic Low Consumption Mode (LCM) to Low Noise Mode (LNM) transition. LCM is designed for applications with active idle mode to maximize the efficiency at light load with controlled output voltage ripple, while LNM keeps the switching frequency constant over the load current range for low noise applications.
The soft start time is internally fixed and the output voltage supervisor manages the reset phase for any digital load (MCU, FPGA, etc.).
The internal compensation network features high noise immunity, simple design and component cost savings. The RST open collector output can also implement output voltage sequencing during the power-up phase.
The synchronous rectification, designed for high efficiency at medium to heavy loads, and the high switching frequency capability contribute to size reduction in final application designs. Pulse-by-pulse current sensing on both power elements implements effective constant current protection.
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All features
- 12 V to 60 V operating input voltage
- Step-down (buck) conversion
- 12 V output voltage
- 300 mA DC max. output current
- 1 MHz selected switching frequency
- Dynamic Low Consumption Mode to Low Noise Mode selection
- Internal soft-start
- Synchronization to external clock
- Internal compensation network
- Auto recovery overcurrent, overvoltage and thermal protection
- RoHS and China RoHS compliant
- WEEE compliant (2012/19/UE RAEE II)
Featured Videos
すべてのリソース
| Resource title | Version | Latest update | Actions | Details | ダウンロード |
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SIMPLIS models (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2025.07 | 24 Jul 2025 | 24 Jul 2025 |
Board Manufacturing Specifications (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 09 Oct 2020 | 09 Oct 2020 |
BOM (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 09 Oct 2020 | 09 Oct 2020 |
Schematic Pack (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 09 Oct 2020 | 09 Oct 2020 |
CAD Design Files (1)
| Resource title | Version | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 31 Jul 2023 | 31 Jul 2023 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | RoHSコンプライアンスグレード | WEEE Compliant | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|---|
| STEVAL-L7983ADJ | Active 交換品交換品 | CARD | Industrial | Ecopack2 | Yes | - | - | |
STEVAL-L7983ADJ
Package:
CARDMaterial Declaration**:
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Sample & Buy
| Part Number | 製品ステータス | Budgetary Price (US$)*/Qty | STから購入 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Supplier | Core Product | Board production status | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-L7983ADJ | | | distributors 販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください |
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STEVAL-L7983ADJ Active
販売代理店に在庫がない場合は、STのセールス･オフィスまでお問い合わせください
（*）概算用の参考価格（US$）です。現地通貨でのお見積りについては、STのセールス･オフィスまたは販売代理店までお問い合わせください。