Diodes Incorporated AP7350D-25CF4-7

Overview

AP7350D-25CF4-7 from Diodes Incorporated is a 2.5V fixed-output, 150mA ultra-low quiescent current LDO regulator with active output discharge, housed in the X2-WLB0606-4 wafer-level chip-scale package. It delivers ±1% output voltage accuracy across -40°C to +85°C, supports 2.0V–5.25V input range, and draws only 0.25µA typical quiescent current - enabling multi-year battery life in compact wearable and IoT sensor modules.

For engineers reviewing the AP7350D-25CF4-7 datasheet, AP7350D-25CF4-7 pinout, AP7350D-25CF4-7 application, or AP7350D-25CF4-7 equivalent, key selection criteria include its 0.25µA IQ, 0.22V dropout at 150mA (for 2.5V output), EN-controlled shutdown with 0.02µA standby current, and integrated active discharge for rapid VOUT decay during power-down sequences.

Technical Context

The AP7350D-25CF4-7 implements a precision bandgap reference and error amplifier driving a PMOS pass transistor, enabling stable regulation with minimal external components. Its enable input controls both startup and full shutdown, while the built-in active discharge path (35Ω typical) pulls VOUT to GND when EN is low - eliminating need for external bleed resistors in space-constrained designs.

This LDO operates across a wide input range (2.0V–5.25V) and maintains ±1% output accuracy at 1mA load and +25°C, degrading to ±2% over full temperature range. Dropout voltage is specified at 0.22V (typ) / 0.48V (max) at 150mA output, ensuring reliable operation even as battery voltage declines in coin-cell or Li-ion applications.

Key Specifications

Pinout & Package

The AP7350D-25CF4-7 uses the X2-WLB0606-4 wafer-level chip-scale package (0.64mm × 0.64mm × 0.34mm, 0.35mm ball pitch), with SnAgCu solderable micro-balls. This 4-ball layout minimizes PCB footprint and thermal resistance (θJA = 267°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with MCP1700T-2502E/TT and XC6210B252MR-G, the AP7350D-25CF4-7 uniquely combines sub-µA quiescent current, integrated discharge, and industry-smallest footprint - making it the only option meeting simultaneous requirements for multi-year battery life, rapid power-down, and sub-1mm² area in next-gen wearables.

Availability

AP7350D-25CF4-7 is available at Aetrix Electronics and suitable for wearable electronics, IoT sensor nodes, and miniature camera modules requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7350D-25CF4-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.

The AP7350 series belongs to Diodes' ultra-low-IQ LDO portfolio, engineered specifically for battery-constrained edge devices where micropower operation, minimal footprint, and precise voltage regulation are non-negotiable design requirements.

FAQ

What is the purpose of the active output discharge feature in AP7350D-25CF4-7?

The active output discharge provides a 35Ω internal path from VOUT to GND when the EN pin is driven low, rapidly discharging the output capacitor. This prevents residual voltage from interfering with downstream logic states during power-down or reset sequences - eliminating need for external bleed resistors and improving system reliability in fast-sequencing applications like BLE peripherals and camera modules.

Can AP7350D-25CF4-7 operate from a single AA alkaline cell?

Yes. With a fresh AA alkaline cell delivering ~1.6V and dropping to ~0.9V under load, the AP7350D-25CF4-7 cannot regulate 2.5V output. However, it functions reliably with two AA cells (2.0–3.2V range) or a single LiFePO₄ cell (2.0–3.6V), maintaining regulation down to 2.72V input (2.5V + 0.22V dropout) across full load and temperature range.

How does the X2-WLB0606-4 package affect thermal performance?

The X2-WLB0606-4 package has a junction-to-ambient thermal resistance (θJA) of 267°C/W under JEDEC-standard PCB conditions. At 150mA output with 0.22V dropout (33mW dissipation), junction temperature rise is ~8.8°C above ambient - well within safe limits. Its wafer-level construction provides lower thermal mass and faster transient response than leaded packages.

Is AP7350D-25CF4-7 qualified for automotive applications?

No. The AP7350D-25CF4-7 is not AEC-Q100 qualified and is intended for commercial/industrial applications only. Diodes Incorporated offers automotive-grade variants (e.g., AP7350Q series) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening - contact Diodes directly for qualified alternatives.