LM3485MMX

DC DC Switching Controllers Overview

The LM3485MMX is a hysteretic PFET buck controller manufactured by Texas Instruments. It operates with a switching frequency range of 50 kHz to 1 MHz and supports a maximum duty cycle of 100%. The device regulates output voltages between 1.242 V and 35 V while delivering up to 4 A of output current. It functions within an ambient temperature range of -40°C to +125°C and is housed in an 8-pin VSSOP package.

DC DC Switching Controllers Feature Summary

• Utilizes hysteretic control architecture for rapid transient response without requiring external compensation networks.
• Supports high-side P-channel MOSFET drive for simplified power stage implementation.
• Enables 100% duty cycle operation to maintain regulation during low input-to-output voltage differentials.

DC DC Switching Controllers Applications

• Point-of-load DC-DC conversion modules
• Industrial equipment power distribution systems
• Telecommunications infrastructure power supplies

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official Texas Instruments documentation to confirm RoHS compliance and lead-free status. Confirm that the MMX designation corresponds to the tape-and-reel packaging format required for automated assembly processes. Cross-reference the manufacturer part number with authorized distributor catalogs to ensure authenticity and traceability.

DC DC Switching Controllers Selection Notes

Select this component when designing non-isolated step-down converters requiring fast transient response and minimal external components. Ensure the chosen P-channel MOSFET meets the voltage and current ratings specified for the target application. Verify that the operating frequency falls within the 50 kHz to 1 MHz range to optimize efficiency and passive component sizes.

DC DC Switching Controllers Part Context

This part belongs to the LM3485 family of hysteretic buck controllers designed for efficient power management. It serves as a core switching element in DC-DC converter designs, replacing traditional PWM controllers in applications where simplicity and speed are prioritized over precise frequency locking.

DC DC Switching Controllers Replacement Considerations

LM3485MM/NOPB is a direct pin-compatible alternative available in cut-tape or tube packaging formats.