AP7340D-33FS4-7

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

The AP7340D-33FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a stable 3.3V output with a maximum current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and features a typical ripple rejection ratio of 75dB at 1kHz. Quiescent current is specified as low as 35µA, while the output noise is 60µVrms across a 10Hz to 100kHz bandwidth. The unit includes an enable pin for power control and is housed in an X2-DFN1010-4 package.

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

• Integrated CMOS process enables high output voltage accuracy and low quiescent current consumption.
• Includes an enable input pin that allows the regulator to be turned on or off via logic signals.
• Features built-in short circuit protection to clamp output current during fault conditions.

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 corresponds to the required X2-DFN1010-4 package and tape-and-reel quantity. Confirm RoHS compliance status and ensure the D-suffix indicates the presence of the auto-discharge feature if discharge functionality is required for the design.

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

Select this component when a 3.3V rail is needed with moderate load requirements up to 150mA. The wide input voltage range supports single-cell battery applications. Ensure PCB layout accommodates the thermal pad for adequate heat dissipation under continuous 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 handheld communication equipment. The 'D' variant distinguishes it from the standard AP7340 by including an internal resistor network for output voltage discharge when disabled, enhancing system safety during shutdown states.

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

AP7340-33FS4-7 (Non-discharge version)

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

What is the function of the EN pin?

The EN pin controls the regulator's operation 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 auto-discharge feature that connects the output to ground through an internal resistor when the device is disabled, whereas the standard AP7340 does not have this function.