产品概述
描述
The L4976 is a step down monolithic power switching regulator delivering 1A 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 Rds(ON) of 0.25W) 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 40V 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, protection against feedback loop disconnection 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
- and hiccup mode)
- Thermal shutdown
- Zero load current operation
- Voltage feedforward
- Up to 1A step down converter
- Precise 5.1V reference voltage
- Operating input voltage from 8v to 55v
- Switching frequency adjustable up to 300kHz
- Internal current limiting (pulse-bypulse
- Output voltage adjustable from 0.5V to 50V
电路原理图
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EDA符号、封装和3D模型
STMicroelectronics - L4976
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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** |
|---|---|---|---|---|---|
| L4976 |
NRND
|
DIP-8 | 工业 | Ecopack2 |
|
| L4976D |
批量生产
|
SO-16W | 工业 | Ecopack1 |
|
| L4976D013TR |
批量生产
|
SO-16W | 工业 | Ecopack1 |
|
L4976
Package:
DIP-8Material Declaration**:
L4976D
Package:
SO-16WMaterial Declaration**:
L4976D013TR
Package:
SO-16WMaterial 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。
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$)*/Qty | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||
| L4976 | 无法联系到经销商，请联系我们的销售办事处 |
NRND
|
EAR99 | NEC | Tube | DIP-8 | -40 | 150 | CHINA | 1.729 / 1k | ||
| L4976D | 3 distributors | Buy Direct |
批量生产
|
EAR99 | NEC | Tube | SO-16W | -40 | 150 | MALAYSIA | 1.9668 / 1k | |
| L4976D013TR | 1 distributors | Free Sample Buy Direct |
批量生产
|
EAR99 | NEC | Tape And Reel | SO-16W | -40 | 150 | MALAYSIA | 1.9668 / 1k | |
供货状态
NRNDECCN (US)
EAR99Budgetary Price (US$)*/Qty
1.729 / 1k