产品概述
描述
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)
所有资源
| Resource title | 版本 | Latest update | Actions | Details | 下載 |
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SIMPLIS models (1)
| Resource title | 版本 | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2025.07 | 24 Jul 2025 | 24 Jul 2025 |
Board Manufacturing Specifications (1)
| Resource title | 版本 | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 09 Oct 2020 | 09 Oct 2020 |
BOM (1)
| Resource title | 版本 | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 09 Oct 2020 | 09 Oct 2020 |
Schematic Pack (1)
| Resource title | 版本 | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 09 Oct 2020 | 09 Oct 2020 |
CAD Design Files (1)
| Resource title | 版本 | Latest update | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 31 Jul 2023 | 31 Jul 2023 |
Quality and Reliability
| Part Number | Marketing Status | Package | Grade | 符合RoHS级别 | WEEE Compliant | Longevity Commitment | Longevity Starting Date | Material Declaration** |
|---|---|---|---|---|---|---|---|---|
| STEVAL-L7983ADJ | Active 产品已量产 | CARD | Industrial | Ecopack2 | Yes | - | - | |
STEVAL-L7983ADJ
Package:
CARDMaterial Declaration**:
(**) st.com上提供的材料声明表单可能是基于包装系列中最常用的封装的通用文档。因此，它们可能不是100%适用于特定的设备。有关特定设备的信息，请联系 销售支持。
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Sample & Buy
| Part Number | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | Package | Packing Type | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | Supplier | Core Product | Board production status | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-L7983ADJ | | | distributors 无法联系到经销商，请联系我们的销售办事处 |
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STEVAL-L7983ADJ Active