LTC3890MPGN-1#PBF

DC DC Switching Controllers Overview

The LTC3890MPGN-1#PBF is a high-performance dual step-down switching regulator DC/DC controller from Analog Devices, designed to drive all N-channel synchronous power MOSFET stages. It features a constant frequency current mode architecture with a phase-lockable frequency up to 850kHz. The device operates with an input voltage range of 4V to 60V and provides two independent outputs. It includes OPTI-LOOP compensation for optimized transient response across various output capacitance and ESR values. The controller offers a precision 0.8V reference, power good indicators, and independent TRACK/SS pins for each channel. Quiescent current in sleep mode is typically 50µA, while shutdown current is 14µA typical.

DC DC Switching Controllers Feature Summary

• Dual synchronous buck controller driving N-channel MOSFETs with out-of-phase operation to minimize input capacitor ESR losses and noise.
• OPTI-LOOP compensation optimizes transient response over a wide range of output capacitance and ESR values.
• Independent TRACK/SS pins allow synchronized ramping of output voltages during start-up for each controller channel.

DC DC Switching Controllers Applications

• Automotive always-on systems
• Battery-operated digital devices
• Distributed DC power systems

DC DC Switching Controllers Procurement Notes

Verify the specific suffix against official documentation to confirm package type and temperature grade. Ensure compatibility with required operating conditions and thermal management requirements. Confirm availability through authorized distributors as supply status may vary. Cross-reference datasheet specifications for electrical parameters prior to integration.

DC DC Switching Controllers Selection Notes

Select this component for applications requiring dual isolated or non-isolated outputs from a single high-voltage rail. Consider the 4V to 60V input range and low quiescent current for efficiency-sensitive designs. Evaluate thermal performance based on expected load currents and PCB layout capabilities.

DC DC Switching Controllers Part Context

This part belongs to the LTC3890 family of PolyPhase controllers. It is specifically the MPGN-1 variant, indicating a military-grade temperature range and SSOP-28 package. It shares core architecture with other LTC3890 variants but differs in packaging and environmental ratings.

DC DC Switching Controllers Replacement Considerations

LTC3890MPGN-1#TRPBF (Tape & Reel version of the same part).

DC DC Switching Controllers FAQ

What is the maximum switchable frequency for the LTC3890MPGN-1?

The device supports a phase-lockable frequency up to 850kHz.

How does the LTC3890 reduce input capacitor noise?

It minimizes power loss and noise due to input capacitor ESR by operating the two controller output stages out-of-phase.