AP7344D-1528RH4-7

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

The AP7344D-1528RH4-7 is a dual-channel low-dropout regulator manufactured by Diodes Incorporated. It provides fixed output voltages of 1.5V on Channel 1 and 2.8V on Channel 2, with a guaranteed continuous output current of 300mA per channel. 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. Output voltage accuracy is specified at ±1% at +25°C. Quiescent current is typically 50µA when one channel is active, dropping to 1µA in standby mode. The component utilizes an X2-DFN1612-8 package.

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

• Dual-channel architecture with independent enable inputs for each regulator
• High ripple rejection capability ensuring stable performance under noisy conditions
• Low output noise characteristic suitable for sensitive RF applications
• Integrated short-circuit protection and thermal shutdown mechanisms

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 the specific ordering suffix RH4-7 confirms the X2-DFN1612-8 package and tape-and-reel quantity. Confirm the 'D' suffix indicates the presence of internal auto-discharge resistors on the outputs. Ensure the design accounts for the recommended ceramic output capacitor values to maintain stability across the operating temperature range.

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

Select this component for designs requiring two distinct regulated rails from a single package footprint. The wide input voltage range accommodates various lithium-ion battery configurations. Verify that the required load currents do not exceed the 300mA limit per channel. Consider the low quiescent current benefits for battery-operated portable electronics where power efficiency is critical.

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

This part belongs to the AP7344 series of dual LDO regulators. The datasheet explicitly states that the AP7344 is not recommended for new designs and advises using the AP7345D instead. The AP7345D offers similar specifications but represents the updated generation within the manufacturer's portfolio for low-power handheld equipment.

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

AP7345D-1528RH4-7

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 device includes built-in discharge resistors on the output channels to rapidly discharge output capacitors when the regulator is disabled.

How does the enable pin control the regulator operation?

Driving the EN pin high enables the respective channel output, while pulling it low puts the regulator into shutdown mode. The pins must not be left floating.