RP111H251B-T1-FE

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

The RP111H251B-T1-FE is a CMOS-based low dropout regulator from the RP111x series, manufactured by Nisshinbo Micro Devices Inc. It provides a fixed output voltage of 2.5V with a maximum output current of 500mA. The device operates within an input voltage range of 1.4V to 5.25V and features a typical supply current of 80µA. Key electrical characteristics include a ripple rejection of 75dB at 1kHz, output voltage accuracy of ±0.8%, and a thermal shutdown temperature of 165°C. It is housed in a SOT-89-5 package.

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

• Built-in foldback protection circuit limits short-circuit current to approximately 50mA.
• Integrated thermal shutdown circuit activates at 165°C to prevent damage.
• Inrush current limit circuit restricts startup current to typ. 400mA for 180µs.
• High ripple rejection ratio of 75dB ensures stable power delivery.

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

• Power source for portable communication equipment.
• Power source for battery-powered equipments.
• Power source for electrical appliances such as cameras, VCRs and camcorders.
• Power source for electrical home appliances.

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

Verify the specific suffix 'B' indicates no auto discharge function at off state. Confirm the 'T1' suffix corresponds to the SOT-89-5 package with 1,000 pieces per reel. Ensure compatibility with ceramic capacitors of 1.0µF or more for phase compensation. Check RoHS compliance status via official documentation before integration.

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

Select this component when a fixed 2.5V output is required with 500mA capability. The SOT-89-5 package offers higher power dissipation compared to smaller packages. Consider the 80µA supply current for battery life efficiency. Verify that the load transient response meets system requirements under varying current conditions.

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

This part belongs to the RP111x Series, which includes variants in DFN1212-6, SOT-23-5, and SOT-89-5 packages. The 'H' prefix denotes the SOT-89-5 package type. Other suffixes like 'L' and 'N' indicate different package options within the same functional family. The series supports output voltages from 0.7V to 3.6V in 0.1V steps.

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

RP111H251D-T1-FE (Same voltage/package, includes auto discharge).

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

What is the difference between the B and D suffixes in RP111H251B/T?

The 'B' suffix indicates the device does not have an auto discharge function at the off state, while the 'D' suffix includes this feature.

What type of capacitors are recommended for the RP111H251B-T1-FE?

Ceramic capacitors are recommended for both input and output, with a capacitance value of 1.0µF or more to ensure stable operation.