Diodes Incorporated AP7383-41W5-7

Overview

AP7383-41W5-7 from Diodes Incorporated is a fixed-output 4.15V ultra-low dropout (ULDO) linear regulator with 150mA output current capability, 30V maximum input voltage, and 500mV dropout at 50mA. It features thermal shutdown, ±1% output voltage accuracy, and 1.8µA ground current at zero load-designed for battery-powered instrumentation and portable USB devices requiring stable low-noise supply rails.

For engineers reviewing the AP7383-41W5-7 datasheet, AP7383-41W5-7 pinout, AP7383-41W5-7 application, or AP7383-41W5-7 equivalent, key selection criteria include dropout performance at 150mA load, EN pin control logic compatibility, thermal resistance in SOT25 package, and ceramic capacitor stability with 1µF COUT.

Technical Context

The AP7383-41W5-7 integrates an error amplifier, precision voltage reference, resistor network for fixed 4.15V output, current-limit circuit (150mA typical), and enable input with 2.0V high-threshold/0.4V low-threshold logic. Its architecture supports operation across -40°C to +125°C junction temperature with ±100ppm/°C output voltage drift.

It delivers 0.05%/V line regulation and 0.5% load regulation over 1–150mA output range, with thermal shutdown activating at +160°C and 20°C hysteresis. The device is optimized for low-ESR ceramic capacitors and exhibits 250mV dropout at 50mA when VOUT = 5.0V-scaling to 360mV at same current for 4.15V output per datasheet characterization.

Key Specifications

Pinout & Package

SOT25 (W5) package: 5-pin surface-mount with exposed pad (not electrically connected), 1.6mm × 2.8mm footprint, 0.95mm height, moisture sensitivity Level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-4102E/MB and XC6210B412MR-G, the AP7383-41W5-7 uniquely combines 4.15V precision, 2.0V/0.4V EN compatibility with standard logic families, and 30V input tolerance-making it optimal for new designs requiring robustness across USB, industrial, and automotive domains.

Availability

AP7383-41W5-7 is available at Aetrix Electronics and suitable for portable medical sensors, industrial data loggers, and USB-powered test equipment requiring stable component supply with guaranteed long-term continuity.

Supply support for AP7383-41W5-7 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 ICs, specializing in high-reliability power management, signal integrity, and protection solutions for industrial, automotive, and consumer markets.

The AP7383 series belongs to Diodes' precision ULDO regulator product line, engineered specifically for battery-constrained and wide-input applications where low quiescent current, thermal resilience, and ceramic capacitor compatibility are mandatory design requirements.

FAQ

What is the minimum input voltage required for regulation at 4.15V output?

The AP7383-41W5-7 requires VIN ≥ VOUT + VDROP. At 50mA load, typical dropout is 360mV, so minimum input is 4.51V. Datasheet specifies absolute minimum VIN as 3.5V, but regulation is not guaranteed below VOUT + 580mV (max dropout) - i.e., 4.73V at 50mA. For reliable operation, maintain VIN ≥ 4.8V under worst-case conditions.

Can the NC pin (Pin 5) be left floating on the PCB?

No. Pin 5 is internally unconnected but must be soldered to GND on the PCB. This maximizes copper area beneath the package for thermal conduction, reducing θJA from 193°C/W to near 170°C/W in typical layouts. Leaving it floating degrades thermal performance and risks localized overheating during 150mA continuous operation.

Does the AP7383-41W5-7 support reverse-voltage protection?

No. The device lacks integrated reverse-polarity protection. If input may be reversed (e.g., during hot-swap or battery insertion), an external series Schottky diode or ideal diode controller is required. Reverse voltage beyond -0.3V on VIN relative to GND risks permanent damage per Absolute Maximum Ratings.

Is the 4.15V output voltage trimmed at production?

Yes. Output voltage is factory-trimmed using laser or fuse-based methods to achieve ±1% tolerance (3.45V to 4.45V) across temperature and load. This eliminates need for external resistive feedback networks and ensures consistent performance without calibration in end equipment.