AP7342D-1818FS6-7

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

The AP7342D-1818FS6-7 is a dual low-dropout regulator from Diodes Incorporated, packaged in an X2-DFN1212-6 footprint. It provides two independent fixed output channels, each delivering 1.8V at up to 150mA. The device operates with an input voltage range of 1.7V to 5.25V and features a typical power supply rejection ratio of 75dB at 1kHz. Quiescent current is specified as low as 35µA per channel, with a maximum operating temperature of +85°C.

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

• Dual-channel architecture with individual enable inputs for independent control
• Integrated active discharge circuitry to ensure defined output states during shutdown
• High ripple rejection capability suitable for noise-sensitive RF applications
• Low output noise performance optimized for communication equipment

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

• Smart phones and tablets
• RF supplies
• Cameras
• Portable videos
• Wireless adapters

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

Verify the specific 'D' suffix indicates the inclusion of internal auto-discharge resistors on both channels, distinguishing it from non-discharge variants. Confirm the FS6 package code corresponds to the X2-DFN1212-6 form factor required for your PCB layout. Ensure the ordering quantity aligns with the standard 5,000-unit tape and reel configuration provided by the manufacturer.

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

Select this component when a compact dual LDO solution is required for space-constrained portable devices. The integrated discharge feature simplifies system startup sequences by preventing floating outputs. Verify that the 1.8V fixed output meets the target rail requirements without needing external resistor networks. Consider the thermal dissipation limits inherent to the small DFN package under high load conditions.

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

This part belongs to the AP7342 series of dual high PSRR low-noise LDOs. It utilizes a CMOS process to achieve low quiescent current and high accuracy. The datasheet explicitly notes that the AP7342 is not recommended for new designs and suggests using the AP7345D instead.

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

Diodes Incorporated recommends using the AP7345D as a replacement for new designs.

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

What is the function of the 'D' suffix in the part number?

The 'D' suffix indicates that the regulator includes built-in auto-discharge resistors on both output channels to pull the voltage down when disabled.

How are the enable pins configured for continuous operation?

To keep the regulator outputs on at all times, the EN1 and EN2 pins should be tied directly to the VIN pin.