Overview
The L5972D is a step-down monolithic power switching regulator produced by STMicroelectronics. It is designed to deliver more than 1.5A DC current to the load, with a minimum switch current limit of 2A. The output voltage can be adjusted from 1.235V to 35V, making it versatile for various applications. The device features an internal P-Channel D-MOS transistor with a typical Rdson of 250mΩ, which helps minimize the size of external components. It operates with an internally fixed switching frequency of 250kHz and is particularly suitable for 5V bus applications, common in computer-related systems.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 2A | A |
| Output Voltage Range | 1.235V to 35V | V |
| Input Voltage Range | 4.4V to 36V | V |
| Switching Frequency | 250kHz | kHz |
| Mosfet On Resistance (Rdson) | 0.250 Ω (typical) | Ω |
| Operating Temperature Range | -25°C to 125°C | °C |
| Package Type | SO-8 | - |
| Mounting Type | SMD | - |
Key Features
- 2A internal switch
- Output voltage adjustable from 1.235V to 35V
- Operating input voltage from 4.4V to 36V
- Internally fixed switching frequency of 250kHz
- Low dropout operation: 100% duty cycle
- Voltage feedforward
- Zero load current operation
- Internal current limiting
- Protection against feedback disconnection
- Thermal shutdown
Applications
- Consumer electronics: STB, DVD, TV, VCR, car radio, LCD monitors
- Networking: XDSL, modems, DC-DC modules
- Computer systems: printers, audio/graphic cards, optical storage, hard disk drive
- Industrial applications: battery chargers, DC-DC converters
Q & A
- What is the maximum output current of the L5972D?
The L5972D can deliver up to 2A of output current.
- What is the adjustable output voltage range of the L5972D?
The output voltage can be adjusted from 1.235V to 35V.
- What is the input voltage range for the L5972D?
The input voltage range is from 4.4V to 36V.
- What is the switching frequency of the L5972D?
The switching frequency is internally fixed at 250kHz.
- What type of transistor is used as the switching element in the L5972D?
An internal P-Channel D-MOS transistor is used.
- What are the key protection features of the L5972D?
The device features thermal shutdown, protection against feedback disconnection, and internal current limiting.
- What is the typical on-resistance (Rdson) of the Mosfet in the L5972D?
The typical Rdson is 250mΩ.
- What is the operating temperature range of the L5972D?
The operating temperature range is from -25°C to 125°C.
- In what package is the L5972D available?
The L5972D is available in an SO-8 package.
- What are some common applications for the L5972D?
Common applications include consumer electronics, networking devices, computer systems, and industrial applications.
