NCP4687DH12T1G

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

The NCP4687DH12T1G is a CMOS 500 mA LDO linear voltage regulator with high output voltage accuracy. It features a high ripple rejection, low supply current, and low dropout. The device includes a chip enable pin and a built-in low RDS(on) NMOS transistor for fast output capacitor discharging. It is composed of a voltage reference unit, error amplifier, and resistor divider for output voltage sensing or precise setting. Current limit and thermal shutdown protect the device.

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

• Built-in auto-discharge NMOS transistor for rapid output capacitor discharge upon disable
• High power supply rejection ratio (PSRR) across operating frequencies
• Integrated current limit and thermal shutdown protection circuits
• SENSE pin capability to improve load regulation by compensating for PCB trace resistance

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

• Home Appliances
• Industrial Equipment
• DVB-T and DVB-S Receivers
• Car Audio Equipment and Navigation Systems
• Notebook Adaptors, LCD TVs, Cordless Phones, and Private LAN Systems

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

Verify component authenticity through authorized onsemi distributors or direct manufacturer channels. Confirm RoHS compliance and Pb-Free status as specified in the datasheet. Ensure proper handling procedures are followed due to ESD sensitivity ratings. Review package dimensions for SOT-89-5 compatibility during integration planning.

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

Select this part when a fixed 1.2 V output is required from a 2.5 V to 5.25 V input range. Consider the SOT-89-5 package for thermal management needs. Evaluate the need for the auto-discharge feature if rapid output settling is critical. Verify that the 500 mA continuous current rating meets the application's peak load requirements.

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

This component belongs to the NCP4687 series of 500 mA LDO regulators. Other variants in the series offer different fixed output voltages ranging from 0.7 V to 3.6 V in 0.1 V steps. The series is available in SOT-23-5, SOT-89-5, and uDFN 1.2 x 1.2 mm packages. All variants share similar electrical characteristics including high PSRR and low quiescent current.

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

Compatible substitutes within the same family include NCP4687DH15T1G, NCP4687DH18T1G, NCP4687DH25T1G, and NCP4687DH33T1G. These parts share identical pinouts and packaging but provide different fixed output voltages. Ensure the alternative voltage matches the system requirement before substitution.