Key facts
- Brand
- STMicroelectronics
- Model
- L4971
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-08-10
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STMicroelectronics L4971 1.5A Step Down Switching Regulator Datasheet
The L4971 is a monolithic power switching regulator delivering up to 1.5A at an output voltage between 3.3V and 50V. Realized in BCD mixed technology, the device uses an internal power D-MOS transistor to achieve high efficiency and switching speeds up to 300kHz. It features a precise 3.3V internal reference and allows for output voltage adjustment via an external divider.
Read onlineSTMicroelectronics L4971 specifications
| Maximum output current | 1.5A |
|---|---|
| Operating input voltage range | 8V to 55V |
| Output voltage range | 3.3V to 50V |
| Maximum switching frequency | 300kHz |
| Internal reference voltage | 3.3V |
Source: STMicroelectronics L4971 1.5A Step Down Switching Regulator Datasheet
All STMicroelectronics L4971 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
How to use the product for one specific task, with worked examples.
Questions answered in these manuals
What is the output voltage range of the L4971?
The output voltage is adjustable from 3.3V to 50V.
From: STMicroelectronics L4971 1.5A Step Down Switching Regulator Datasheet
What is the maximum output current?
The device delivers up to 1.5A.
From: STMicroelectronics L4971 1.5A Step Down Switching Regulator Datasheet
What is the startup voltage for the L6920D?
The startup is guaranteed at 1V.
From: STMicroelectronics AN1941 Low Voltage LED Driver Application Note
What is the maximum output current of the L4971?
The L4971 is able to deliver 1.5A.
From: STMicroelectronics AN1941 Low Voltage LED Driver Application Note
What is the switching frequency formula for the L4971?
The switching frequency (Fsw) in KHz is calculated using a resistor (Rosc) and capacitor (Cosc) with the formula: Fsw = 1 / ((Rosc * Cosc) * ln(8) + 100 - Cosc).
From: STMicroelectronics AN937 Designing with L4971 DC-DC Converter Application Note
What packages are available for the L4971?
The device is available in two plastic packages: DIP8 and SO16L.
From: STMicroelectronics AN937 Designing with L4971 DC-DC Converter Application Note