login
L6983 38 V Step-Down Converter is a synchronous monolithic step-down regulator
STMicroelectronics’ step-down converter is an easy to use synchronous monolithic step-down regulator
STMicroelectronics L6983 Synchronous Step-Down Converter is an easy to use monolithic step-down regulator capable of delivering up to 3A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The L6983 is based on a peak current mode architecture. The device is packaged in a QFN16 3×3 with internal compensation, thus minimizing design complexity and size.
The L6983 is available both in low consumption mode (LCM) and low noise mode (LNM) versions. LCM maximizes the efficiency at light-load with controlled output voltage ripple so the device is suitable for battery-powered applications. LNM makes the switching frequency constant and minimizes the output voltage ripple for light load operations, meeting the specification for low noise-sensitive applications. The L6983 allows the switching frequency to be selected in the 200kHz to 2.2MHz range with an optional spread spectrum for improved EMC.
The EN pin provides an enable/disable function. The typical shutdown current is 2µA when disabled. As soon as the EN pin is pulled up, the device is enabled, and the internal 1.3ms soft-start takes place. The L6983 features Power Good open collector that monitors the FB voltage. Pulse-by-pulse current sensing on both power elements implements an effective constant current protection, and thermal shutdown prevents thermal run-away.
Features
- Two different versions: LCM for high efficiency at light loads and LNM for noise-sensitive applications
- 200 kHz to 2.2 MHz programmable switching frequency; stable with low-ESR capacitors
- Operating input voltage: 3.5 V to 38 V
- Output voltage: 0.85 V to VIN
- 3 ADC output current
- Operating quiescent current: 17 μA
- 2 μA shutdown current
- Optional spread spectrum for improved EMC
Applications
- Designed for 24 V buses industrial power systems
- 24 V battery-powered equipment
- Decentralized intelligent nodes
- Sensors and always-on applications
Block Diagram:
RELATED POSTS
3 June, 2020 RS PRO RSDM3045X Bench Digital Multimeter
29 November, 2018 I²CDriver – An easy-to-use tool for controlling I²C devices
15 February, 2017 Make Your Own Laser Scanning Microscope
18 March, 2019 Convert a $20 Router To Home Automation Gateway For IoT Devices
16 January, 2024 Pi-Cast KVM: A Portable KVM Built with a Raspberry Pi CM4 Module
26 February, 2020 Meet I-Pi SMARC, the Industrial-Ready Prototyping Platform from ADLINK
