LMR43620RS3QRPERQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LMR43620RS3QRPERQ1 is a synchronous step-down DC-DC converter from Texas Instruments, operating within a 3 V to 36 V input voltage range. It delivers a fixed 3.3 V output at up to 2 A of continuous current. The device features ultra-low quiescent current of 1.5 µA and supports an adjustable switching frequency between 200 kHz and 2.2 MHz via the RT pin. Designed for high reliability, it operates over a junction temperature range of -40°C to +150°C and holds AEC-Q100 automotive qualification. The component is housed in a compact 9-pin VQFN-HR package with wettable flanks.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Automotive-grade reliability with AEC-Q100 certification and extended temperature operation up to 150°C
• Ultra-low standby power consumption with 1.5 µA quiescent current for battery-sensitive applications
• Compact footprint utilizing a 2 mm x 2 mm HotRod QFN package with internal compensation
• Flexible switching frequency adjustment from 200 kHz to 2.2 MHz to optimize efficiency and size

Voltage Regulators - DC DC Switching Regulators Applications

• Factory automation field transmitters and process sensors
• Building automation HVAC systems and fire safety controllers
• Industrial IoT gateways and edge computing nodes

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the suffix 'Q1' confirms AEC-Q100 automotive qualification status. Ensure the 'S' indicates the specific fixed 3.3 V output variant. Confirm the 'RPER' suffix corresponds to the VQFN-HR-9 package with wettable flanks. Cross-reference the manufacturer part number against official TI documentation to validate revision history and compliance data before finalizing procurement specifications.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when designing for automotive environments requiring high thermal tolerance and low static current. The 2 A output capability suits moderate load requirements where space constraints necessitate a small solution size. Consider the adjustable frequency feature if EMI filtering needs optimization or synchronization with other system clocks is required. Verify input voltage stability against the 36 V maximum rating during transient events.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LMR436x0 family of 36-V buck converters, designed to replace older generations with improved efficiency and smaller footprints. It shares pin compatibility with lower-current variants like the LMR36503 and LMR36506, facilitating scalable power supply designs across different current requirements within the same industrial or automotive platform architecture.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

LMR43620MB5RPER: Non-automotive grade equivalent with similar electrical characteristics but lacking AEC-Q100 certification.

Voltage Regulators - DC DC Switching Regulators FAQ

Does the LMR43620RS3QRPERQ1 support external synchronization?

Yes, the Mode/Sync pin allows the switching frequency to be synchronized with an external clock signal.

What is the maximum junction temperature for this component?

The device is rated for a maximum junction temperature of 150°C, suitable for harsh industrial and automotive environments.