LT3150CGN#TRPBF

Overview

The LT3150CGN#TRPBF is a linear regulator controller in a 16-lead SSOP package. It drives an external N-channel MOSFET to create a very low dropout linear regulator with fast transient response. The device includes a fixed frequency 1.4MHz boost converter for gate drive generation, allowing the use of small ceramic capacitors and inductors. Key electrical parameters include a VIN1 operating range of 1.1V to 10V, a precision 1.21V reference voltage at FB2, and a switching frequency of 1.4MHz. The controller supports independent shutdown control for power supply sequencing.

Feature Summary

• Drives external N-channel MOSFET as a source follower for ultrafast transient response and very low dropout performance.
• Integrates a fixed frequency 1.4MHz internally compensated boost converter to generate MOSFET gate drive using tiny passive components.
• Features a multifunction SHDN2 pin providing current limit time-out latchoff, overvoltage protection, or thermal shutdown capabilities.
• Includes independent boost converter shutdown control (SHDN1) to permit LDO output voltage supply sequencing.

Applications

• Microprocessor core supplies
• ASIC power supplies
• I/O supplies
• Logic termination supplies

Procurement Notes

Verify the specific ordering suffix TRPBF indicates tape and reel packaging when sourcing from distributors. Confirm that the CGN variant corresponds to the commercial temperature range of 0°C to 70°C. Ensure the component is sourced directly from Analog Devices Inc. or authorized partners to guarantee authenticity and compliance with RoHS3 specifications.

Selection Notes

Select this controller when designing low input-to-output voltage conversion circuits requiring high efficiency and minimal bulk capacitance. The design requires an external N-channel MOSFET with appropriate RDS(ON) characteristics to define the dropout voltage. Proper selection of ceramic output capacitors is critical to optimize the fast transient load performance specified by the manufacturer.

Part Context

This component belongs to the LT3150 family of linear regulator controllers manufactured by Analog Devices Inc. It is designed to replace traditional monolithic regulators or PNP-driven solutions that suffer from slow transient responses. The device enables cost savings by eliminating expensive polymer or tantalum bulk capacitors, relying instead on readily available ceramic capacitors for decoupling.

Replacement Considerations

LT3150CGN#PBF