AP7344D-1812RH4-7

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

The AP7344D-1812RH4-7 is a dual-channel low-dropout regulator from Diodes Incorporated, housed in an X2-DFN1612-8 package. It provides fixed output voltages of 1.8V on Channel 1 and 1.2V on Channel 2. The device guarantees a continuous output current of 300mA per channel with ±1% accuracy at +25°C. Operating input voltage ranges from 1.7V to 5.25V. Key electrical characteristics include a ripple rejection ratio of 75dB at 1kHz, low output noise of 60µVrms (10Hz to 100kHz), and a quiescent current as low as 50µA. Dropout voltage varies between 0.22V and 0.59V depending on the specific channel and load conditions.

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

• Dual independent channels with individual enable inputs for precise power sequencing or shutdown control
• Integrated active discharge circuitry to rapidly pull down output voltage upon disablement
• High ripple rejection capability combined with ultra-low output noise for sensitive RF applications
• Compact footprint design optimized for dense PCB layouts in portable electronic devices

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

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

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

Verify component authenticity through authorized Diodes Incorporated distribution channels. Confirm that the marking code matches the specified identification code for this part number. Ensure compliance with RoHS 3 directives and halogen-free requirements during procurement. Validate package integrity against the X2-DFN1612-8 specifications prior to assembly.

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

Select this component when dual isolated rails are required within a single compact package. The D suffix indicates the presence of built-in auto-discharge features, which differ functionally from non-discharge variants. Evaluate thermal dissipation capabilities based on the maximum power dissipation rating and ensure adequate copper area on the thermal pad for optimal heat transfer.

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

This device belongs to the AP7344 family of dual LDO regulators designed for battery-powered consumer electronics. It utilizes a CMOS process to achieve high efficiency and low static current consumption. The product is intended for handheld communication equipment requiring stable power delivery under varying load conditions.

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

The datasheet explicitly states that the AP7344 is not recommended for new designs and recommends using the AP7345D instead. Verify pin compatibility and electrical parameter equivalence before substituting with other dual-channel LDOs.

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 a built-in active discharge feature, which automatically pulls the output voltage down when the enable pin is set low.

How does the enable pin affect the operation of the channels?

Driving the EN pin high enables the respective channel output, while pulling it low shuts down the regulator and activates the discharge circuit if present.