产品概述
描述
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 L6981NDR 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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所有功能
- 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
- Two different versions: LCM for high efficiency at light loads and LNM for noise sensitive applications
- 2 μA shutdown current
- Internal soft-start
- Enable function
- Overvoltage protection
- Output voltage sequencing
- Thermal protection
- SO 8L package
- Synchronization with external clock for LNM devices
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所有资源
| 资源标题 | 版本 | 更新时间 | Actions | 細節 | 下載 |
|---|
SIMPLIS models (1)
| 资源标题 | 版本 | 更新时间 | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 2025.07 | 24 Jul 2025 | 24 Jul 2025 |
Board Manufacturing Specifications (1)
| 资源标题 | 版本 | 更新时间 | Actions | Options | ||
|---|---|---|---|---|---|---|
| ZIP | 1.0 | 19 Feb 2021 | 19 Feb 2021 |
BOM (1)
| 资源标题 | 版本 | 更新时间 | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 18 Feb 2021 | 18 Feb 2021 |
Schematic Pack (1)
| 资源标题 | 版本 | 更新时间 | Actions | Options | ||
|---|---|---|---|---|---|---|
| 1.0 | 18 Feb 2021 | 18 Feb 2021 |
质量与可靠性
| 料号 | Marketing Status | 包 | 等级规格 | 符合RoHS级别 | WEEE Compliant | Longevity Commitment | Longevity Starting Date | 材料声明** |
|---|---|---|---|---|---|---|---|---|
| STEVAL-L6981NDR | 批量生产 产品已量产 | CARD | 工业 | Ecopack2 | Yes | - | - | |
STEVAL-L6981NDR
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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样片和购买
| 料号 | 供货状态 | Budgetary Price (US$)*/Qty | 从ST订购 | Order from distributors | 包 | 包装类型 | RoHS | Country of Origin | ECCN (US) | ECCN (EU) | 供应商 | 核心产品 | Board production status | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| STEVAL-L6981NDR | | | 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-L6981NDR 批量生产