LP5951MG-1.3/NOPB

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

The LP5951MG-1.3/NOPB is a micropower, low-dropout (LDO) CMOS voltage regulator manufactured by Texas Instruments. It provides a fixed positive output voltage of 1.3 V with a maximum continuous output current of 150 mA. The device features a typical quiescent current of 55 µA and maintains a dropout voltage of approximately 200 mV at full load. It operates within an input voltage range up to 5.5 V and offers a typical power supply rejection ratio (PSRR) of 60 dB. The component is housed in a compact SC-70-5 surface-mount package and supports operation across an extended temperature range from -40°C to +125°C.

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

• Micropower architecture designed for battery-operated applications with ultra-low quiescent current consumption
• Low-dropout performance ensuring stable regulation even when the input-to-output voltage differential is minimal
• Integrated enable control pin allowing for precise power management and system-level shutdown capabilities
• Built-in protection mechanisms including thermal shutdown and current limiting to safeguard against overload conditions

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

• Portable consumer electronics requiring efficient power management from single-cell batteries
• Wireless communication modules needing stable low-voltage rails for RF sections
• Embedded systems utilizing microcontrollers or sensors that require clean, regulated power supplies
• Battery-powered instrumentation where minimizing standby current is critical for extended operational life

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

Verify the specific suffix 'NOPB' confirms lead-free and RoHS compliance status as per the manufacturer's latest documentation. Ensure the SC-70-5 package variant matches your PCB footprint requirements exactly. Cross-reference the fixed 1.3 V output specification against your circuit design needs to prevent overvoltage issues. Confirm availability through authorized distributors to avoid counterfeit components, especially given the component's age and potential obsolescence status in certain regions.

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

Select this component when a fixed 1.3 V rail is required with minimal static current draw. The SC-70-5 package is suitable for space-constrained designs compared to larger SOT-23 variants. Consider the 150 mA output limit to ensure it meets the peak current demands of the load without triggering thermal protection. Evaluate the PSRR performance if the input source contains significant noise that could affect sensitive downstream analog circuits.

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

This part belongs to the LP5951 series of micropower LDO regulators from Texas Instruments. The series includes various output voltage options and package types, such as SOT-23-5 and SC-70-5. The 'MG' designation indicates the SC-70-5 package, while '1.3' specifies the fixed output voltage. The 'NOPB' suffix typically denotes a non-plastic leaded (lead-free) version compliant with environmental standards. This family is designed for applications prioritizing low power consumption and small form factors.

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

LP5951MG-1.3/NOPB serves as the direct lead-free replacement for the older LP5951MG-1.3 model. Verify pin compatibility and electrical specifications before substituting with other LDOs. Alternative parts must match the 1.3 V output, 150 mA current capability, and SC-70-5 package dimensions.