STMicroelectronics L6983 38V 3A step-down converter

L6983 is an easy to use synchronous monolithic step-down regulator capable of delivering up to 3 A 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 and is packaged in a QFN16 3 x 3 with internal compensation thus minimizing design complexity and size.

2 versions are available :

- LCM (low consumption mode) to maximize the efficiency at light-load with controlled output voltage ripple.

- LNM (low noise mode) with switching frequency constant and minimized output voltage ripple.

Features

• 3.5 V to 38 V Operating Input Voltage
• 17 μA Quiescent Current
• LCM (Low Consumption Mode) Version for High Efficiency at Light Loads
• LNM (Low Noise Mode) Version for Noise-sensitive Applications

Additional features

• Output voltage from 0.85 V to VIN
• 3.3 V and 5 V fixed output voltage versions
• 3 A DC output current
• Internal compensation network
• 2 μA shutdown current
• Internal soft-start
• Enable
• Overvoltage protection
• Output voltage sequencing
• Thermal protection
• 200 kHz to 2.2 MHz programmable switching frequency. Stable with low ESR capacitor
• Optional spread spectrum for improved EMC
• Power Good
• Synchronization to an external clock for LNM devices
• QFN16 package

Applications

• Designed for 24 V Buses industrial Power Systems
• 24 V Battery Powered Equipment
• Decentralized Intelligent Nodes
• Sensors and Always-on Applications
• Low Noise Applications

Available tools

STEVAL-ISA208V1

• 38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983CQTR

STEVAL-ISA209V1

• 38 V, 3 A synchronous step-down switching regulator evaluation board based on the L6983NQTR

L6983 / 2 / 1 Integrated synchronous regulators, DC/DC converters