LTC3890MPGN-3#PBF

DC DC Switching Controllers Overview

The LTC3890MPGN-3#PBF is a military-grade, low IQ dual 2-phase synchronous step-down DC/DC controller manufactured by Analog Devices Inc. It operates with an input voltage range of 4 V to 60 V and supports output voltages from 800 mV to 24 V. The device features a typical quiescent current of 50 uA and a shutdown current of 14 uA typical. It drives all N-channel synchronous power MOSFET stages using a constant frequency current mode architecture with a phaselockable switching frequency between 105 kHz and 835 kHz. The component is housed in a 28-pin SSOP package and is rated for operation temperatures from -55°C to +150°C.

DC DC Switching Controllers Feature Summary

• Dual channel architecture allows independent control of two synchronous buck converters with out-of-phase operation to minimize input capacitor ESR losses.
• OPTI-LOOP compensation optimizes transient response across a wide range of output capacitance and ESR values.
• Independent TRACK/SS pins enable synchronized ramping of output voltages during startup sequences.
• Current foldback functionality limits MOSFET heat dissipation during short-circuit conditions.

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 #PBF indicates tube packaging when sourcing this part number. Confirm that the military grade designation (MP prefix) meets the required environmental specifications for the target application. Check official Analog Devices documentation for any recent lifecycle changes or obsolescence notices. Ensure compatibility with the intended PCB footprint for the SSOP-28 package. Validate supply chain authenticity through authorized distributors.

DC DC Switching Controllers Selection Notes

Select this controller for applications requiring high efficiency and low standby power in harsh environments. The wide input voltage range suits battery-powered and automotive systems. Consider the thermal performance of the SSOP package for high-current designs. Evaluate the need for military-grade qualification versus commercial alternatives. Assess layout requirements for minimizing noise in sensitive analog circuits.

DC DC Switching Controllers Part Context

This component belongs to the LTC3890 series of PolyPhase controllers. It shares functional similarities with other variants like the LTC3890EUH#PBF but differs in package type and temperature rating. The MP prefix denotes military-grade reliability standards. It complements development kits such as the DC2299A-A for design verification.

DC DC Switching Controllers Replacement Considerations

Public confirmed substitute part numbers include LTC3890MPGN-3#TRPBF for reel packaging equivalents. Other family members like LTC3890MPUH#TRPBF offer QFN packages with similar electrical characteristics. Verify pinout compatibility before substitution.