AP7340D-36FS4-7

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

The AP7340D-36FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a 3.3V output with a maximum current of 150mA and operates within an input voltage range of 1.7V to 5.25V. The device features high power supply rejection ratio (PSRR) of 75dB at 1kHz and low output noise of 60µVrms from 10Hz to 100kHz. Quiescent current is as low as 35µA, and the unit includes an enable pin for shutdown control. It is housed in an X2-DFN1010-4 package.

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

• Integrated auto-discharge circuitry to rapidly deplete output voltage when disabled
• High ripple rejection capability for sensitive analog and RF applications
• Low output noise profile suitable for precision signal processing
• Built-in short-circuit protection and thermal regulation

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

• Smart phone and tablet power management
• RF supply circuits
• Portable video equipment
• Wireless communication adapters

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

Verify that the specific suffix 'D' corresponds to the version with integrated output discharge functionality, as standard versions lack this feature. Confirm the package code FS4 matches the required X2-DFN1010-4 footprint. Ensure compliance with RoHS and Halogen-free requirements if mandated by the target assembly specifications.

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

Select this component when a fixed 3.3V rail is required alongside active output discharge capabilities. The D-suffix variant is necessary if system power-down sequencing requires rapid removal of charge from the output node. Compare quiescent current against battery life requirements and ensure the PCB layout accommodates the thermal pad for adequate heat dissipation.

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

This part belongs to the AP7340 series of CMOS low dropout regulators designed for handheld communication equipment. The series offers various fixed output voltages ranging from 1.1V to 3.3V. The AP7340D specifically denotes the inclusion of an internal N-channel auto-discharge resistor connected between VOUT and GND upon disable.

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

AP7340-33FS4-7 serves as a functional substitute but lacks the integrated output discharge feature found in the AP7340D variant.