LM53603BQPWPRDN

Voltage Regulators - DC DC Switching Regulators Overview

The LM53603BQPWPRDN is a synchronous step-down switching regulator from Texas Instruments, designed for automotive applications with AEC-Q100 qualification. It supports an input voltage range of 3.5 V to 36 V, accommodating transients up to 42 V. The device delivers a maximum output current of 3 A with a fixed switching frequency of 2.1 MHz. It features adjustable output voltages between 3.3 V and 10 V in a single-output configuration. Key electrical parameters include a quiescent current of 8 uA and operation across a temperature range of -40°C to +150°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated synchronous rectification for high efficiency within a compact surface-mount package.
• Wide input voltage tolerance capable of handling automotive load dump and transient conditions.
• Fixed high-frequency operation enabling the use of small external passive components.

Voltage Regulators - DC DC Switching Regulators Applications

• Automotive infotainment system power distribution
• Electronic control unit (ECU) auxiliary power supplies
• Telematics and connectivity module regulation

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify that the specific suffix 'B' aligns with the required output voltage configuration and manufacturing lot specifications. Confirm that the HTSSOP-16 package dimensions match the target PCB footprint. Ensure the AEC-Q100 grade meets the specific reliability requirements of the end application environment.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a wide input range up to 36 V is required alongside a fixed 2.1 MHz switching frequency. It is suitable for designs prioritizing high efficiency through synchronous rectification without requiring external diodes. Consider the thermal performance of the HTSSOP-16 package for the expected load current.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM53603 family of wide-input synchronous buck converters. The family includes variants with different output currents and packaging options. The LM53603 series is engineered specifically for robust automotive environments, offering integrated protection features and high operating temperature capabilities compared to standard industrial regulators.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes within the same family include the LM53602QPWPRQ1 for lower current requirements or the LM53603QPWPRQ1 for alternative packaging. Cross-vendor equivalents require matching the 3.5 V to 36 V input range and 3 A output capability while verifying pin compatibility.