LT1170CT#PBF

Overview

The LT1170CT#PBF is a monolithic high-power switching regulator manufactured by Analog Devices Inc. It integrates a high-current, high-efficiency power switch with complete oscillator, control, and protection circuitry on a single die. The device supports multiple standard switching topologies including buck, boost, flyback, forward, inverting, and Cuk configurations. It operates with an input voltage range of 3 V to 60 V and provides an adjustable output voltage from 1.244 V up to 65 V (switch rating). The regulator delivers a maximum output current of 5 A with a fixed switching frequency of 100 kHz. It is housed in a TO-220-5 package and functions within a junction temperature range of 0°C to 100°C.

Feature Summary

• Integrates a high-current, high-efficiency power switch with all necessary oscillator, control, and protection circuitry on a single monolithic die.
• Supports versatile operation across all standard switching configurations, including buck, boost, flyback, forward, inverting, and Cuk topologies.
• Provides adjustable output voltage capability with a wide input voltage range suitable for various DC-DC conversion applications.

Applications

• Buck converter circuits
• Boost converter circuits
• Flyback converter designs
• Forward converter implementations
• Inverting and Cuk topology regulators

Procurement Notes

Verify the specific suffix and tape/reel or tube packaging details against the manufacturer's latest datasheet before ordering. Confirm that the TO-220-5 through-hole package meets your board layout requirements. Ensure the thermal management design accommodates the device's power dissipation characteristics at the intended load conditions. Cross-reference the part number with official Analog Devices documentation to confirm current production status and availability constraints.

Selection Notes

Select this component when a robust, integrated solution for high-power DC-DC conversion is required without external driver complexity. It is suitable for designs needing flexibility in topology choice, such as isolated flyback or non-isolated buck/boost applications. Consider the 5 A current capability and 100 kHz switching frequency for balancing efficiency and component size. Verify that the operating temperature range and input voltage specifications align with the system's environmental and power supply conditions.

Part Context

The LT1170 series represents a family of high-power switching regulators designed for demanding industrial and commercial applications. The CT variant specifically denotes the commercial temperature grade version packaged in a TO-220-5 leaded housing. This form factor facilitates manual assembly and prototyping while providing adequate thermal performance for moderate power levels. The #PBF suffix indicates lead-free compliance according to RoHS standards.

Replacement Considerations

LT1170CT#06PBF and LT1170IT#PBF are documented parameter-equivalent alternatives. Verify pinout compatibility and thermal resistance differences when substituting. Ensure the replacement part meets the same electrical specifications for input voltage, output current, and switching frequency.