AP7340D-12FS4-7

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

The AP7340D-12FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 1.2V with an accuracy of ±1%. The device supports a maximum output current of 150mA and operates within an input voltage range of 1.7V to 5.25V. Key electrical characteristics include a quiescent current as low as 35µA, ripple rejection of 75dB at 1kHz, and output noise of 60µVrms from 10Hz to 100kHz. It features fold-back short circuit protection and 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 mode
• High power supply ripple rejection capability
• Low output noise performance suitable for sensitive circuits
• Built-in thermal and current limit protection

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

• Smart Phone/PAD
• RF Supply
• Cameras
• Portable Video
• Wireless Communication

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

Verify the specific suffix FS4-7 confirms the X2-DFN1010-4 package and tape-and-reel packaging quantity. Confirm the 'D' designation indicates the presence of an internal auto-discharge feature on the output when disabled. Ensure compliance requirements such as RoHS and Halogen-free status match project specifications before finalizing procurement orders.

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

Select this component for applications requiring precise 1.2V regulation with minimal footprint. The D-series variant includes an auto-discharge function, which may be necessary if rapid output voltage decay is required upon shutdown. Evaluate the dropout voltage characteristics against the minimum expected input voltage to ensure stable operation under all load conditions.

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

This part belongs to the AP7340 series of low dropout regulators designed for low power handheld communication equipment. The series utilizes a CMOS process to achieve high output voltage accuracy and low quiescent current. The AP7340D variant specifically incorporates an N-channel auto-discharge resistor to pull down the output voltage when the enable pin is deactivated.

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

AP7340-12FS4-7 (Non-discharge version)

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

What is the difference between AP7340 and AP7340D?

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

How should the EN pin be handled if enable control is not used?

If enable control is not required, the EN pin should be tied to the VIN pin to keep the regulator output on continuously. It must not be left floating.