AP7345D-2818RH4-7

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

The AP7345D-2818RH4-7 is a dual low dropout regulator from Diodes Incorporated, packaged in an X2-DFN1612-8 footprint. It provides two independent positive fixed output channels: Channel 1 at 2.8V and Channel 2 at 1.8V. Each channel guarantees a continuous output current of 300mA with a wide input voltage range of 1.7V to 5.25V. The device features high ripple rejection of 75dB at 1kHz and low output noise of 60µVrms across the 10Hz to 100kHz bandwidth. Quiescent current is specified as low as 50µA per active channel, with standby current dropping to 1.0µA maximum when both enable pins are low.

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

• Dual-channel architecture with individual enable inputs for independent power control
• High ripple rejection ratio ensuring stable performance under noisy supply conditions
• Low output noise characteristics suitable for sensitive RF and communication circuits
• Integrated thermal shutdown and fold-back short circuit protection mechanisms

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

• Smart phone and tablet power distribution
• RF module supply regulation
• Portable video equipment power management
• Wireless adapter and communication interface powering

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 packaging format. Ensure the part number matches the required 2.8V and 1.8V output combination. Confirm RoHS compliance status if restricted material usage is mandated by your design specifications.

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

Select this component when dual isolated rails are required within a minimal PCB area constraint. The 300mA per channel rating supports moderate load requirements without external pass transistors. Verify that the input voltage remains within the 1.7V to 5.25V window during all operating conditions to maintain regulation accuracy.

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

This device belongs to the AP7345D family of dual LDO regulators designed for portable electronics. It utilizes a CMOS process to achieve low quiescent current and small form factor. The series is engineered to replace discrete transistor solutions or single-channel regulators where space efficiency and multi-rail generation are critical design priorities.

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

AP7345D-2818FS4-7 (X1-DFN1612-8 package)

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

How does the enable pin function affect power consumption?

Setting an enable pin low activates standby mode for that channel, reducing quiescent current to a maximum of 1.0µA. Driving the pin high enables normal operation with a typical quiescent current of 50µA.

What is the recommended capacitor configuration for stability?

The datasheet recommends using ceramic capacitors with low ESR. A minimum 1µF input capacitor and appropriate output capacitors should be placed close to the VIN and VOUT pins respectively to ensure stability and transient response.