AP7340D-18FS4-7

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

The AP7340D-18FS4-7 is a fixed-output low dropout regulator manufactured by Diodes Incorporated. It provides a nominal output voltage of 1.8V with a maximum guaranteed output current of 150mA. The device operates within an input voltage range of 1.7V to 5.25V and features high power supply rejection ratio (PSRR) of 75dB at 1kHz. Quiescent current is specified as low as 35µA, with a maximum standby current of 1.0µA. Output voltage accuracy is ±1% at 25°C. The component includes integrated short-circuit protection and thermal shutdown, packaged in an X2-DFN1010-4 surface-mount 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 RF applications
• Low output noise performance suitable for communication equipment
• Built-in overcurrent and thermal protection mechanisms

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

• Smart phone and tablet power supplies
• RF module power regulation
• Portable video devices
• Wireless communication adapters

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

Verify the specific suffix FS4-7R against official Diodes Incorporated documentation to confirm the X2-DFN1010-4 package and tape-and-reel quantity. Ensure the D variant designation matches the required auto-discharge functionality for the target circuit design. Cross-reference datasheet revision DS35282 Rev. 5 for accurate electrical parameters.

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

Select this component when a fixed 1.8V rail is required with minimal footprint constraints. The D suffix indicates the presence of an internal discharge resistor for the output capacitor upon shutdown. Verify that the load transient requirements align with the recommended 0.47µF ceramic input and output capacitors for stability.

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 variant specifically includes an auto-discharge feature on the output node when disabled, distinguishing it from the standard AP7340 non-discharge version.

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

AP7340-18FS4-7 serves as a functional substitute if the auto-discharge feature is not required in the application design.