LM43603AQPWPRQ1

Voltage Regulators - DC DC Switching Regulators Overview

The LM43603AQPWPRQ1 is an automotive-qualified synchronous buck switching regulator from Texas Instruments. It operates with an input voltage range of 3.5 V to 36 V and delivers a maximum output current of 3 A. The device features adjustable output voltages between 1 V and 28 V, utilizing a fixed internal feedback reference. Switching frequency is programmable from 200 kHz to 2.2 MHz. It is housed in a 16-pin PowerTSSOP package (HTSSOP) with a width of 4.40 mm. The component supports junction temperatures from -40°C to +125°C and includes integrated protection mechanisms such as thermal shutdown and cycle-by-cycle current limiting.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Synchronous step-down topology for high efficiency
• Programmable switching frequency up to 2.2 MHz
• Integrated power MOSFETs for compact design
• Automotive grade reliability certification

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment systems
• Instrument clusters and body control modules
• Telematics units
• ADAS sensor power supplies

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'A' indicates the intended temperature or grade variant against the official datasheet. Confirm the 'Q1' designation aligns with required automotive qualification standards. Ensure the PWPR package code matches the target PCB footprint. Cross-reference the manufacturer part number directly with the latest TI documentation to avoid obsolete revisions.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a 3 A output capability within a 36 V input window is required for automotive environments. The wide frequency range allows optimization for size versus noise. Consider the 16-pin HTSSOP package constraints for thermal management. Verify that the load transient requirements are met by the internal control loop characteristics defined in the electrical specifications.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM4360x SIMPLE SWITCHER family, designed for ease of use with minimal external components. It utilizes peak current mode control for straightforward compensation. The series targets applications requiring high efficiency and small solution size in constrained spaces. It shares architectural similarities with other members like the LM43602 and LM43603 variants.

Voltage Regulators - DC DC Switching Regulators FAQ

What is the maximum input voltage supported?

The device supports a maximum input voltage of 36 V.

Is the output voltage fixed or adjustable?

The output voltage is adjustable via an external resistor divider network, ranging from 1 V to 28 V.