AP7340-18FS4-7

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

The AP7340-18FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 1.8V with a guaranteed maximum output current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and maintains high power supply rejection ratio performance of 75dB at 1kHz. Quiescent current is specified as low as 35µA, while the output noise voltage is limited to 60µVrms across a frequency band from 10Hz to 100kHz. The unit is housed in an X2-DFN1010-4 package.

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

• Integrated enable pin for precise power management control
• High ripple rejection capability for sensitive circuitry
• Low output noise characteristics suitable for RF applications
• Built-in short circuit protection for enhanced reliability

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 that the specific part number suffix matches the required output voltage tolerance and packaging configuration. Confirm RoHS compliance status and ensure the ordering quantity aligns with standard reel sizes. Cross-reference datasheet revision numbers to validate electrical specifications against current production batches before finalizing procurement orders.

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

Select this component when a stable 1.8V rail is required for portable devices. Ensure the input voltage remains above the minimum threshold while accounting for dropout voltage under full load conditions. Verify that the PCB layout accommodates the X2-DFN1010-4 footprint and thermal pad requirements for optimal heat dissipation during operation.

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

This device belongs to the AP7340 series of low dropout regulators designed for handheld communication equipment. The series utilizes CMOS technology to achieve low power consumption and fast transient response. The AP7340-18FS4-7 variant specifically targets applications requiring a fixed 1.8V output with minimal external component count and compact board space utilization.

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

AP7340D-18FS4-7

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

What is the function of the EN pin on the AP7340-18FS4-7?

The EN pin serves as the enable input. Driving it high activates the regulator, while pulling it low initiates shutdown mode. It must not be left floating.

How does the AP7340-18FS4-7 handle short circuits?

The device includes short circuit protection that triggers when the output is shorted to ground, clamping the output current to approximately 60mA to prevent damage.