产品概述
描述
The L4971 is a step down monolithic power switching regulator delivering 1.5A at a voltage between 3.3V and 50V (selected by a simple external divider). Realized in BCD mixed technology, the device uses an internal power D-MOS transistor (with a typical Rdson of 0.25Ω) to obtain very high efficency and high switching speed. A switching frequency up to 300KHz is achievable (the maximum power dissipation of the packages must be observed).A wide input voltage range between 8V to 55V and output voltages regulated from 3.3V to 50V cover the majority of today’s applications.
Features of this new generations of DC-DC converter include pulse-by-pulse current limit, hiccup mode for short circuit protection, voltage feedforward regulation, soft-start, protection against feedback loop disconnection, inhibit for zero current consumption and thermal shutdown.
The device is available in plastic dual in line, DIP8 for standard assembly, and SO16W for SMD assembly.
-
所有功能
- PROTECTION AGAINST FEEDBACK DISCONNECTION
- INHIBIT FOR ZERO CURRENT CONSUMPTION
- SOFT START FUNCTION
- THERMAL SHUTDOWN
- ZERO LOAD CURRENT OPERATION
- VOLTAGE FEEDFORWARD
- UP TO 1.5A STEP DOWN CONVERTER
- PRECISE 3.3V (±1%) INTERNAL REFERENCE VOLTAGE
- OPERATING INPUT VOLTAGE FROM 8V TO 55V
- SWITCHING FREQUENCY ADJUSTABLE UP TO 300KHz
- INTERNAL CURRENT LIMITING (PULSE-BY PULSE AND HICCUP MODE)
- OUTPUT VOLTAGE ADJUSTABLE FROM 3.3V TO 50V
Start your design with the L4971 now
xwith our eDesignSuite online design aid utilities and simulation tools.
您可能还会喜欢...
精选 视频
All tools & software
EDA符号、封装和3D模型
STMicroelectronics - L4971
为您的应用下载所有EDA符号、封装和3D模型，加快您的设计速度。您可以从大量CAD格式中进行选择，以匹配您的设计工具链。
符号
封装
3D模型
质量与可靠性
| 产品型号 | Marketing Status | 封装 | 等级规格 | 符合RoHS级别 | 材料声明** |
|---|---|---|---|---|---|
| L4971 | 批量生产 | DIP-8 | 工业 | Ecopack2 | |
| L4971D | 批量生产 | SO-16W | 工业 | Ecopack1 | |
| L4971D013TR | 批量生产 | SO-16W | 工业 | Ecopack1 |
(**) 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。
eDesignSuite
eDesignSuite is a comprehensive set of easy-to-use design-aid utilities ready to help you streamline the system development process with a wide range of ST products.
Power Supply Design Tool
SMPS design, by topology, by type and by product PFC design with analog and digitial control Supports various PCB configurations 样片和购买
| 产品型号 | 从分销商订购 | 从ST订购 | 供货状态 | ECCN (US) | ECCN (EU) | 包装类型 | 封装 | 温度（ºC） | Country of Origin | Budgetary Price (US$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| L4971 | 5 distributors | 批量生产 | EAR99 | NEC | Tube | DIP-8 | - | - | CHINA | | ||
| L4971D | 4 distributors | 批量生产 | EAR99 | NEC | Tube | SO-16W | - | - | MALAYSIA | | ||
| L4971D013TR | 4 distributors | 批量生产 | EAR99 | NEC | Tape And Reel | SO-16W | - | - | MALAYSIA | | ||