AP7351D-185FS4-7B

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

The AP7351D-185FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a stable 1.85V output with a maximum current of 150mA. It operates within an input voltage range of 1.4V to 5.5V and features ultra-low quiescent current of 0.5µA and standby current of 0.02µA. The device includes an enable pin for power control, active output discharge, and thermal shutdown protection. Packaged in the compact X2-DFN1010-4 (Type B) format, it offers high ripple rejection up to 60dB at 1kHz and maintains output accuracy within ±1% across temperatures from -40°C to +85°C.

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

• Ultra-low quiescent and standby currents extend battery life in portable devices
• Integrated enable pin allows precise on/off control and system state management
• Active output discharge ensures predictable startup states when disabled
• High ripple rejection and low noise performance suitable for sensitive subsystems

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

• Wearable electronics
• IoT sensor modules
• Wireless communication modules
• Camera and image sensors

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

Verify that the FS4 suffix corresponds to the X2-DFN1010-4 (Type B) package configuration required for your PCB layout. Confirm the -7B suffix indicates tape and reel packaging with a standard quantity of 10,000 units per reel. Ensure compatibility with RoHS and halogen-free manufacturing standards if applicable to your supply chain requirements.

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

Select this component when designing for applications requiring minimal ground current consumption during active operation. The 1.85V fixed output is ideal for powering specific logic levels or analog cores. Consider the small footprint of the X2-DFN1010-4 package for dense board layouts where space is constrained compared to traditional SOT packages.

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

This part belongs to the AP7351D series of low dropout regulators designed for low-power handheld and wearable devices. The series provides various fixed output voltages ranging from 0.8V to 4.5V. It shares common architectural features such as CMOS process technology, internal current limiting, and thermal shutdown across all voltage variants in the family.

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

Direct replacements include other AP7351D variants with different output voltages or packages, such as AP7351D-18FS4-7B for 1.8V output. Cross-family alternatives may require verification of pinout compatibility and electrical parameter alignment.