AP7340D-28FS4-7

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

The AP7340D-28FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 2.8V with an accuracy of ±1% at +25°C and ±1.5% across the operating temperature range. The device supports a maximum output current of 150mA and operates within an input voltage range of 1.7V to 5.25V. Key electrical specifications include a quiescent current as low as 35µA, a ripple rejection ratio of 75dB at 1kHz, and an output noise voltage of 60µVrms from 10Hz to 100kHz. It is housed in an X2-DFN1010-4 package.

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

• Integrated enable pin for power control and shutdown management
• Built-in auto-discharge circuitry to rapidly reduce output voltage upon disable
• High power supply ripple rejection capability for clean signal chains
• Low output noise performance suitable for sensitive analog circuits

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

• RF Supply
• Wireless Communication
• Portable Media Player
• Cameras

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

Verify the specific suffix FS4-7R against official Diodes Incorporated documentation to confirm the X2-DFN1010-4 package and tape-and-reel quantity. Ensure the D variant designation matches the requirement for the integrated discharge feature. Confirm RoHS compliance status through the manufacturer's quality statements before finalizing procurement orders.

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

Select this component when a fixed 2.8V rail is required with minimal footprint constraints. The D-series designation indicates the inclusion of an internal discharge resistor, which is critical for applications requiring rapid output voltage decay during shutdown. Verify that the load transient requirements align with the stability characteristics provided for ceramic capacitors in the application guidelines.

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

This part belongs to the AP7340 family of high PSRR low noise LDOs. The 'D' prefix specifically denotes the version equipped with an N-channel auto-discharge function on the output pin. This distinguishes it from the standard AP7340 series, which lacks this discharge mechanism. The device utilizes a CMOS process to achieve low power consumption and small physical dimensions.

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

AP7340-28FS4-7 (Non-discharge variant)

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

What is the function of the EN pin?

The EN pin controls the regulator state; driving it high enables the output, while pulling it low activates shutdown mode.

How does the AP7340D differ from the AP7340?

The AP7340D includes an internal auto-discharge resistor that pulls the output voltage down when the device is disabled, whereas the standard AP7340 does not have this feature.