L6986H3V3

Voltage Regulators - DC DC Switching Regulators Overview

The L6986H3V3 is a synchronous step-down switching regulator from STMicroelectronics, delivering up to 2 A DC output. It features a wide input voltage range of 4 V to 38 V and a fixed 3.3 V output. The device incorporates low consumption mode (LCM) for idle efficiency and low noise mode (LNM) for constant frequency operation. Key electrical parameters include a quiescent current of 30 µA in LCM, adjustable switching frequency from 250 kHz to 2 MHz, and an internal high-side RDS(on) of 180 mΩ with a low-side RDS(on) of 150 mΩ. It includes an embedded output voltage supervisor and operates within a temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous rectification architecture ensures high efficiency at medium to heavy loads while maintaining compact application size through high switching frequency capability.
• Dual operational modes allow optimization for either light-load efficiency via Low Consumption Mode or minimal output ripple via Low Noise Mode with constant switching frequency.
• Integrated output voltage supervisor manages reset phases for digital loads and supports output voltage sequencing during power-up using the open-collector RST output.

Voltage Regulators - DC DC Switching Regulators Applications

• Powering microcontrollers and FPGAs requiring stable 3.3 V rails
• Industrial control systems operating on 12 V or 24 V supply lines
• Embedded applications requiring efficient power management during idle states

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix configuration against the official datasheet to confirm the fixed 3.3 V output variant. Ensure compatibility with HTSSOP-16 packaging requirements and check moisture sensitivity handling procedures. Confirm that the selected component meets the required thermal and electrical specifications for the target environment before finalizing procurement.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when a fixed 3.3 V output is required alongside a wide 4 V to 38 V input range. It is suitable for designs needing programmable switching frequencies between 250 kHz and 2 MHz to optimize filter size. Consider its integrated supervisor and sequencing capabilities if the application involves complex power-up sequences for digital logic loads.

Voltage Regulators - DC DC Switching Regulators Part Context

The L6986H3V3 belongs to the L6986H series of monolithic switching regulators designed for high-efficiency step-down conversion. This series utilizes peak current mode architecture and P-channel MOSFET technology to achieve 100% duty cycle operation. The component is part of STMicroelectronics' portfolio aimed at providing robust power management solutions for automotive and industrial environments.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and electrical parameter compatibility with any alternative components before implementation.