产品概述
描述
The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions.
The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 °C/W.
The device uses an internal P-Channel D-MOS transistor (with a typical of 200 mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency.
An internal oscillator fixes the switching frequency at 500 kHz to minimize the size of external components.
Having a minimum input voltage of 4 V only, it is particularly suitable for 5 V bus, available in all computer related applications.
Pulse by pulse current limit with the internal frequency modulation offers an effective constant current short circuit protection.
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所有功能
- Inhibit for zero current consumption
- Internal current limiting
- Protection against feedback disconnection
- Synchronization
- Thermal shutdown
- Voltage feedforward
- 500 kHz Internally fixed frequency
- 2 A Internal switch
- 3.3 V / (±2 %) reference voltage
- Operating input voltage from 4 V to 36 V
- Low dropout operation: 100 % duty cycle
- Zero load current operation
- Output voltage adjustable from 1.235 V to 35 V
电路原理图
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EDA符号、封装和3D模型
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符号
封装
3D模型
所有资源
| 资源标题 | 版本 | 更新时间 |
|---|
SPICE models (1)
| 资源标题 | 版本 | 更新时间 | ||
|---|---|---|---|---|
| ZIP | 22 Sep 2016 | 22 Sep 2016 |
质量与可靠性
| 产品型号 | Marketing Status | 包 | 等级规格 | 符合RoHS级别 | Longevity Commitment | Longevity Starting Date | 材料声明** |
|---|---|---|---|---|---|---|---|
| L5973AD | 批量生产 | PowerSO-8 | 工业 | Ecopack2 | 10 | 2023-06-06T00:00:00.000+02:00 | |
| L5973ADTR | 批量生产 | PowerSO-8 | 工业 | Ecopack2 | 10 | 2023-06-06T00:00:00.000+02:00 |
(**) 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 | 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) | Operating temperature (°C) | Operating Temperature (°C) (max) | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 最小值 | 最大值 | |||||||||||||
| L5973AD | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
| L5973ADTR | | | distributors 无法联系到经销商，请联系我们的销售办事处 | |||||||||||
L5973AD 批量生产
L5973ADTR 批量生产