AP7351D-25FS4-7B

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

The AP7351D-25FS4-7B is a fixed-output low dropout regulator manufactured by Diodes Incorporated, providing a precise 2.5V output with a maximum current capability 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 management, 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 the operating temperature range.

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

• Ultra-low quiescent and standby currents extend battery life in portable applications
• Integrated enable control allows precise power switching and system state management
• Active output discharge ensures predictable startup states when disabled
• Built-in thermal shutdown and short-circuit current limiting protect against overload conditions

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

• Wearable electronics requiring extended battery operation
• Sensor modules for Internet-of-Things (IoT) devices
• Wireless communication modules
• Battery-operated handheld devices
• Image sensors and camera subsystems

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

Verify that the specific part number suffix matches the required package type and output voltage configuration before ordering. Confirm compliance with RoHS and halogen-free requirements if mandated by your manufacturing standards. Ensure the supply chain source provides original manufacturer documentation to validate authenticity and traceability.

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

Select this component when a stable 2.5V rail is needed from a single-cell lithium or alkaline battery source. The wide input voltage range accommodates varying battery states. Consider the small footprint for space-constrained designs. Verify that the load transient response meets the sensitivity requirements of the downstream circuitry.

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

This device belongs to the AP7351D family of ultra-low quiescent current LDO regulators. The series is designed for battery-powered consumer electronics where minimizing ground current is critical. Other variants in the family offer different fixed output voltages ranging from 0.8V to 4.5V and are available in SOT25 packages.

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

Compatible substitutes include other AP7351D variants with different fixed output voltages, such as AP7351D-18FS4-7B or AP7351D-33FS4-7B, provided the system voltage requirement changes. Cross-referencing pinouts and thermal characteristics is necessary when substituting between package types.