Diodes Incorporated AP7380-50Y-13

Overview

AP7380-50Y-13 from Diodes Incorporated is a fixed 5.0V, 150mA ultra-low dropout (ULDO) linear regulator in SOT89 (Option 2) package, designed for space-constrained portable and battery-powered systems requiring stable output under wide input (3.5–24V), low quiescent current (1.8µA), and high accuracy (±1% over line/load/temperature). It integrates thermal shutdown, current limiting, and enable control.

For engineers reviewing the AP7380-50Y-13 datasheet, AP7380-50Y-13 pinout, AP7380-50Y-13 application, or AP7380-50Y-13 equivalent, key selection criteria include dropout voltage at 150mA (max 1100mV), ±100ppm/°C temperature coefficient, compatibility with low-ESR ceramic capacitors, and SOT89 thermal resistance (θJA = 118°C/W).

Technical Context

The AP7380-50Y-13 employs a precision bandgap reference and error amplifier to regulate output voltage with ±1% initial accuracy and ±0.5% load regulation (1–150mA). Its internal current limit circuit activates at 150mA typical, and thermal shutdown engages at +160°C with +20°C hysteresis.

It operates across –40°C to +125°C junction temperature with ultra-low ground current (1.8µA at IOUT = 0A and 150mA), enabling long battery life in always-on subsystems. The EN pin supports logic-level control (VIH ≥ 2.0V, VIL ≤ 0.4V) with standby current <0.01µA.

Key Specifications

Pinout & Package

SOT89 (Option 2) package: 3-pin surface-mount, thermally enhanced plastic outline with exposed tab (pin 2) connected to GND for improved heat dissipation (θJC = 20°C/W). Dimensions: 4.60 × 2.60 × 1.50 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1703T-5002E/MB and NCP1117ST50T3G, the AP7380-50Y-13 delivers superior battery life via 1.8µA IQ and lower dropout at mid-load, while its 118°C/W θJA suits compact enclosures better than the SOT223 alternative.

Availability

AP7380-50Y-13 is available at Aetrix Electronics and suitable for USB-powered peripherals, industrial sensor nodes, portable medical devices, and point-of-sale terminals requiring stable component supply with RoHS-compliant, halogen-free packaging.

Supply support for AP7380-50Y-13 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 semiconductor company specializing in discrete, analog, and mixed-signal solutions, with manufacturing certified to IATF 16949 and product definitions aligned to AEC-Q200 for industrial and automotive applications.

The AP7380 series belongs to Diodes' precision power management portfolio, engineered specifically for battery-sensitive and wide-input industrial applications demanding ultra-low IQ, high accuracy, and robust thermal protection.

FAQ

What is the minimum input voltage required for regulation at 150mA load?

The AP7380-50Y-13 requires VIN ≥ VOUT + VDROP. At 150mA, max dropout is 1100mV per datasheet, so minimum VIN = 5.0V + 1.1V = 6.1V. Below this, output voltage drops out of regulation. Input must also meet absolute min spec of 3.5V, but regulation is only guaranteed above 6.1V at full load.

Can the AP7380-50Y-13 be used without an enable signal?

Yes - the EN pin is internally pulled up. When left unconnected or tied to VIN, the device operates continuously. To disable, drive EN ≤ 0.4V (logic low); standby current drops to <0.01µA. No external pull-up resistor is needed, simplifying designs where always-on operation is acceptable.

Is the SOT89 (Option 2) package thermally adequate for 150mA continuous operation?

At 150mA and 24V input, power dissipation is (24V − 5V) × 0.15A = 2.85W. With θJA = 118°C/W, junction rise is ~336°C - exceeding 150°C max TJ. Derating is essential: at ambient 50°C, max continuous IOUT ≈ 85mA. For full 150mA, use forced air or large copper pour to reduce effective θJA below 70°C/W.

Does the AP7380-50Y-13 require specific capacitor types or values?

Yes - it is optimized for 1.0µF ceramic capacitors on both input and output (X5R/X7R, 6.3V+ rating). Larger values improve transient response but are not required. Tantalum or aluminum electrolytics are not recommended due to ESR sensitivity and potential instability. Capacitor placement within 2mm of pins is critical for EMI suppression and loop stability.