LM828M5X/NOPB

Voltage Regulators - DC DC Switching Regulators Overview

The LM828M5X/NOPB is a CMOS charge-pump voltage converter manufactured by Texas Instruments. It operates within an input voltage range of 1.8 V to 5.5 V and provides a fixed negative output voltage corresponding to the inverted input polarity. The device delivers up to 25 mA of output current with a switching frequency of 12 kHz. It functions as a single-output regulator in a SOT-23-5 (SC-74A) surface-mount package, supporting junction temperatures from -40°C to +85°C.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Inverts positive input supply voltages to corresponding negative outputs using external capacitors
• Provides high conversion efficiency suitable for battery-powered applications
• Utilizes a compact SOT-23-5 package for space-constrained designs

Voltage Regulators - DC DC Switching Regulators Applications

• Cellular phones and mobile communication devices
• Operational amplifier power supplies requiring dual rails
• Interface power supplies for RS-232 or similar serial communications
• Handheld instruments and PDAs

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix M5X against the manufacturer's latest datasheet to confirm pinout compatibility and marking codes. Ensure the order quantity aligns with standard reel sizes if bulk procurement is required. Confirm RoHS compliance status matches project specifications. Cross-reference the part number with authorized distributors to avoid counterfeit components. Validate that the operating temperature range meets the environmental requirements of the final assembly.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this component when a low-cost, single-output voltage inversion is required for portable electronics. It is appropriate for applications where moderate output current up to 25 mA suffices. Consider the 12 kHz switching frequency for ripple management in sensitive analog circuits. Evaluate the SOT-23-5 footprint constraints during PCB layout. Compare against other charge pumps if higher current or different topologies are needed.

Voltage Regulators - DC DC Switching Regulators Part Context

This part belongs to the LM828 family of switched-capacitor voltage converters originally developed by National Semiconductor and now produced by Texas Instruments. It serves as a legacy solution for generating negative supply rails from a single positive source. The device is widely recognized for its simplicity and minimal external component count in low-power signal conditioning circuits.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

Direct substitutes include LM828 variants with different packaging or suffixes such as LM828IM5X/NOPB. Verify pin-to-pin compatibility before substitution. Alternative charge pump ICs may require circuit redesign due to differing switching frequencies or current capabilities.