LM2825N-3.3/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM2825N-3.3/NOPB is a fixed-output buck switching regulator IC from Texas Instruments, providing a stable 3.3V output at up to 1A load current. It operates with an input voltage range of 4.75V to 40V and features a switching frequency of 460 kHz. The device integrates a 1MHz error amplifier and supports multiple topologies including boost, flyback, forward, and half-bridge configurations. Key electrical parameters include a maximum duty cycle of 80%, rise/fall times of 30 ns, and supply currents of 22 mA. It is housed in a 24-pin DIP package and rated for operation between -40°C and +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Integrated power supply controller supporting step-down, boost, flyback, forward, and half-bridge topologies
• Built-in protection features including current limiting, enable control, frequency control, slope compensation, and soft-start
• High-speed transistor driver outputs capable of 1.5A sink/source current with 30ns transition times
• Fixed 3.3V output configuration with positive output type and single output channel

Voltage Regulators - DC DC Switching Regulators Applications

• Industrial power supply systems requiring isolated or non-isolated DC-DC conversion
• Automotive electronics applications within the specified temperature range
• Multi-output power distribution networks using coupled inductor techniques
• Battery-powered devices utilizing boost or buck-boost architectures

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'N' indicates the plastic DIP package variant and '/NOPB' confirms lead-free and RoHS compliance status. Confirm the 24-pin physical footprint matches your PCB layout requirements. Ensure the 40V absolute maximum input rating aligns with your system's transient voltage conditions. Check that the 1A continuous output current meets your load demands without exceeding thermal limits in the DIP enclosure.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a fixed 3.3V output is required with high input voltage tolerance up to 40V. It is suitable for designs needing flexible topology support beyond simple buck conversion. Consider the 24-pin DIP package for through-hole assembly or prototyping needs. Evaluate the 460kHz switching frequency against EMI constraints and external component size requirements for your specific application environment.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM2825 family of integrated power supplies, which are versatile controllers designed for various DC-DC converter topologies. Unlike standard fixed regulators, it offers configurable operation modes. The LM2825 series is commonly used in applications requiring robust performance across wide input ranges. It serves as a core control element in power stages where precise regulation and protection are critical.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Public confirmed substitute part numbers: LM2825N-5.0/NOPB (for 5V output requirement). Verify pin compatibility and thermal characteristics before substitution. Ensure the replacement maintains the same 24-DIP package and operational voltage ranges.