STMicroelectronics L6981
38 V, 1.5 A synchronous step-down converter with low quiescent current
The L6981 is an easy-to-use synchronous monolithic step-down regulator capable of delivering up to 1.5 A DC to the load. The wide input voltage range makes the device suitable for a broad range of applications. The L6981 is based on a peak current mode architecture and is packaged in an SO8 with internal compensation, thus minimizing design complexity and size. The L6981 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.
Key features
- 90% typical efficiency at 1.5A load (24V to 5V)
- IQ at 3.3V = 17 μA with Low Consumption Mode (LCM) for 3.3V and 5V version
- 400 kHz fixed frequency
- Internal Compensation Network
Additional features
- 3.5 V to 38 V operating input voltage
- Output voltage from 0.85 V to VIN
- 1.5 A DC output current
- Internal compensation network
- Two different versions:
- LCM for high efficiency at light-loads
- LNM for noise-sensitive applications
- 2 μA shutdown current
- Internal soft-start
- Enable
- Overvoltage protection
- Output voltage sequencing
- Thermal protection
- Synchronization to an external clock for LNM devices
- SO8 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-L6981CDR:
- STEVAL-L6981NDR:
L6983 / 2 / 1 Integrated synchronous regulators, DC/DC converters
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STMicroelectronics L6981 38 V, 1.5 A Converter | EBV Elektronik
