Diodes Incorporated AP7383-33FDC-7

Overview

AP7383-33FDC-7 from Diodes Incorporated is a fixed-output 3.3V ultra-low dropout (ULDO) linear regulator with 150mA output current capability, 30V maximum input voltage, and 500mV dropout at 50mA. It features ±1% output voltage accuracy, 1.8µA ground current at zero load, thermal shutdown, and compatibility with low-ESR ceramic capacitors. It is designed for power management in space-constrained battery-powered instrumentation and portable USB devices.

For engineers reviewing the AP7383-33FDC-7 datasheet, AP7383-33FDC-7 pinout, AP7383-33FDC-7 application, or AP7383-33FDC-7 equivalent, key selection criteria include dropout performance at 150mA load, thermal resistance in U-DFN2020-6 (θ_JA = 152°C/W), EN pin logic thresholds, and stability with 1µF input/output ceramics.

Technical Context

The AP7383-33FDC-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.3V output, current-limit protection circuit, and enable control logic. Its internal architecture supports operation across -40°C to +125°C junction temperature with ±100ppm/°C output voltage temperature coefficient.

It delivers stable regulation under wide line (3.5–30V input) and load (1mA–150mA) conditions, with 0.05%/V line regulation and 0.5% load regulation. Thermal shutdown activates at +160°C with +20°C hysteresis, ensuring safe operation during overload or ambient rise.

Key Specifications

Pinout & Package

AP7383-33FDC-7 is housed in a 2.0mm × 2.0mm, 0.65mm height U-DFN2020-6 (Type C) package with wettable flank leads for automated optical inspection. The package has a thermal pad on the underside for enhanced heat dissipation.

Key Features

Applications

Equivalent & Alternatives

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

Compared with AP7361-33FDC-7, the AP7383-33FDC-7 provides 50% more output current without increasing footprint or quiescent current; versus MCP1703T-3302E/MB, it trades 200mA extra current for 10.2µA lower IQ and 35% smaller area-critical for wearables and sensor nodes.

Availability

AP7383-33FDC-7 is available at Aetrix Electronics and suitable for portable medical sensors, USB-powered test equipment, and industrial data loggers requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for AP7383-33FDC-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-reliability power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP7383 series belongs to Diodes' high-voltage ULDO regulator product line, engineered specifically for battery-powered and wide-input industrial applications where low IQ, high accuracy, and small footprint are essential.

FAQ

What is the minimum input voltage required for regulation at 3.3V output?

The AP7383-33FDC-7 requires a minimum input voltage of 3.5V to maintain regulation, per its Recommended Operating Conditions. At 150mA load, the dropout voltage reaches up to 1.5V, so VIN must be ≥4.8V to sustain full output current. Below 3.5V, the device enters dropout or shuts down.

Does the U-DFN2020-6 (Type C) package require thermal vias under the exposed pad?

Yes. The U-DFN2020-6 (Type C) package includes an exposed thermal pad on the bottom surface. Diodes recommends using ≥4 thermal vias (0.3mm diameter, filled or capped) connecting the pad to an internal or bottom-layer copper pour to achieve the specified θ_JA = 152°C/W and prevent thermal shutdown under 150mA load.

Can the EN pin be left floating, or must it be pulled high/low?

The EN pin must not be left floating. It has no internal pull-up/down and exhibits undefined logic state. For default-enabled operation, connect EN directly to VIN. For controlled shutdown, drive EN with a clean digital signal (≥2.0V for ON, ≤0.4V for OFF); floating EN may cause erratic output toggling or increased leakage.

Is the AP7383-33FDC-7 qualified for automotive applications per AEC-Q100?

No. The AP7383-33FDC-7 is not AEC-Q100 qualified. Diodes offers automotive-grade variants (e.g., AP7383Q series) with PPAP documentation, IATF 16949 manufacturing, and extended temperature screening. This part is rated for industrial temperature range (-40°C to +125°C) but lacks automotive change control and qualification testing.