RT9073A-09GQZ

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

The RT9073A-09GQZ is a low-dropout (LDO) linear regulator manufactured by Richtek. It provides a fixed output voltage of 0.9V with a maximum output current of 250mA. The device operates within an input voltage range of 1.2V to 5.5V and features a typical quiescent current of 1μA. It offers a power supply rejection ratio (PSRR) of 75dB at 1kHz and has a maximum dropout voltage of 800mV at full load. The component is housed in a ZQFN-4 package and supports operation temperatures from -40°C to +85°C.

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

• Ultra-low quiescent current of 1μA for extended battery life
• Stable with ceramic output capacitors across the entire load range
• Integrated enable function for power management
• Miniaturized ZQFN-4 packaging for space-constrained designs

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

• Battery-powered portable electronic devices
• Low-power embedded systems
• IoT sensor nodes requiring minimal standby current

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

Verify the specific suffix GQZ corresponds to the ZQFN-4 package and reel/tape configuration required for your assembly process. Confirm that the 0.9V fixed output matches your system's rail requirements, as this variant differs from other voltage options in the RT9073A series. Ensure compatibility with your PCB footprint and thermal design guidelines for the small outline package.

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

Select this component when designing circuits powered by single-cell lithium batteries or similar sources where input voltages may drop close to the output level. The low IQ makes it suitable for applications requiring long standby times. Verify that the 250mA load capability meets peak demand and that the 1.2V minimum input voltage aligns with your lowest expected source voltage.

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

The RT9073A series belongs to Richtek's portfolio of general-purpose LDO regulators designed for consumer electronics and industrial applications. These devices emphasize low power consumption and stability with modern ceramic capacitors. The RT9073A-09GQZ specifically addresses the need for very low voltage rails in compact mobile and wearable form factors.

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

Other variants within the RT9073A family share identical pinouts and functionality but offer different fixed output voltages. When substituting, ensure the replacement part maintains the same ZQFN-4 package and electrical characteristics, adjusting only for the required output voltage level.