AP7340D-31FS4-7

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

The AP7340D-31FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 3.1V 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 ripple rejection ratio of 75dB at 1kHz, an output noise voltage of 60µVrms (10Hz to 100kHz), and a quiescent current as low as 35µA. It features integrated short-circuit protection and an enable pin for power control.

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

• Integrated enable pin allows for precise power management and shutdown control
• High ripple rejection capability ensures stable operation in noisy environments
• Low output noise design suitable for sensitive RF and communication circuits
• Built-in short-circuit protection safeguards the regulator from overcurrent damage

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 part number suffix against official manufacturer documentation to confirm package type and reel quantity specifications. Ensure compatibility with RoHS compliance requirements and verify that the ordering code matches the intended fixed output voltage variant before procurement.

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

Select this component when a fixed 3.1V rail is required with minimal footprint constraints. Consider the X2-DFN1010-4 package for dense PCB layouts. Evaluate the 150mA current limit against peak load demands and ensure the input voltage remains within the specified operational range for optimal line regulation performance.

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

This device belongs to the AP7340 series of low dropout regulators designed for low-power handheld communication equipment. The 'D' suffix indicates the inclusion of an auto-discharge feature on the output when disabled. It utilizes a CMOS process technology to achieve high efficiency and low power consumption while maintaining small physical dimensions.

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

AP7340-31FS4-7

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

What is the function of the EN pin?

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

How does the AP7340D differ from the standard AP7340?

The AP7340D includes an internal discharge resistor network that automatically discharges the output capacitor when the device is disabled.