AP7342D-3318FS6-7

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

The AP7342D-3318FS6-7 is a dual low-dropout regulator from Diodes Incorporated, packaged in an X2-DFN1212-6 footprint. It provides two fixed output voltages: Channel 1 outputs 3.3V and Channel 2 outputs 1.8V. The device guarantees a continuous output current of 150mA per channel with a wide input voltage range of 1.7V to 5.25V. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, a maximum dropout voltage of 0.29V at 150mA for the 3.3V channel, and a typical quiescent current of 70µA when both channels are active.

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

• Dual-channel architecture with independent enable inputs for individual channel control
• Integrated auto-discharge circuitry to rapidly pull down output voltage upon shutdown
• High power supply rejection ratio (PSRR) combined with low output noise for sensitive RF applications
• Built-in short-circuit protection and thermal shutdown to safeguard against overcurrent conditions

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

• Smart phones and tablets
• RF supplies
• Cameras
• Portable videos
• Wireless communication devices

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

Verify component authenticity through authorized distribution channels. Confirm that the specific ordering suffix matches the required package type and output discharge configuration. Ensure compliance with relevant environmental directives such as RoHS standards before finalizing procurement orders.

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

Select this component when a compact dual-rail solution is required for portable electronics. The X2-DFN1212-6 package minimizes PCB area while maintaining high thermal performance. Verify that the input voltage range accommodates the system's battery or rail variations across the full operating temperature range.

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

This part belongs to the AP7342 series of dual LDO regulators designed for low-power handheld communication equipment. The series utilizes a CMOS process to achieve low quiescent current and high PSRR. The D suffix indicates the inclusion of built-in output discharge resistors for faster turn-off times compared to non-discharge variants.

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

The datasheet explicitly recommends using the AP7345D instead of the AP7342 for new designs. Verify if the AP7345D meets the specific voltage and current requirements of the existing application before proceeding with substitution.

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 the output pins to rapidly pull down the voltage when the enable pin is set low.

How does the enable pin control the regulator operation?

Driving the EN pin high enables the corresponding channel output, while pulling it low puts the regulator into shutdown mode, activating the auto-discharge feature if present.