LP2951ACNG

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The LP2951ACNG is a micropower voltage regulator from onsemi, housed in an 8-pin PDIP package. It provides a fixed positive output of 3.3 V with a maximum output current of 100 mA and an initial output voltage tolerance of ±0.5%. The device features a low quiescent bias current of 75 µA and maintains regulation with an input-to-output voltage differential as low as 50 mV at 100 µA load. It operates within an ambient temperature range of -40°C to +125°C and includes internal current and thermal limiting protection.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Integrated error output flag for out-of-regulation detection
• Logic level shutdown input for power control
• Internal current and thermal limiting protection

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Battery powered computer equipment
• Consumer electronics
• Industrial equipment requiring extended battery life

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify the specific ordering suffix 'N' corresponds to the PDIP-8 package configuration when sourcing. Confirm RoHS compliance and lead-free status requirements for the target assembly process. Ensure the application environment remains within the specified -40°C to +125°C operating temperature range to maintain regulatory performance.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component for applications requiring a fixed 3.3 V rail with high precision. The ±0.5% tolerance suits reference or strict logic supply needs. Consider the 8-pin layout for additional shutdown and error signaling capabilities not available in the 3-pin LP2950 variant. Ensure adequate PCB copper area for thermal dissipation if operating near maximum current limits.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

This part belongs to the LP2951 series of micropower regulators designed by onsemi. It shares core architecture with the LP2950 but adds dedicated pins for error monitoring and shutdown functionality. The 'A' suffix denotes improved voltage accuracy compared to standard versions. It is distinct from the NCV prefix parts which are qualified for automotive PPAP requirements.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

LP2951ACD-3.3R2G (SOIC-8 package)

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators FAQ

How does the error output function?

The error comparator switches to a positive logic low whenever the output voltage falls more than approximately 5.0% out of regulation.

What is the purpose of the shutdown input?

The shutdown input allows a logic level signal to turn off or turn on the regulator output, enabling power management control.