Diodes Incorporated AP7380-36WR-7

Overview

AP7380-36WR-7 from Diodes Incorporated is a fixed-output 3.6V ultra-low dropout (ULDO) linear regulator IC designed for space-constrained portable and battery-powered systems. It delivers up to 150mA output current with 500mV dropout at 50mA, ±1% output voltage accuracy, 1.8µA ground current at zero load, and operates across a 3.5V–24V input range - enabling direct regulation from multi-cell batteries or industrial rails in USB peripherals and handheld instrumentation.

For engineers reviewing the AP7380-36WR-7 datasheet, AP7380-36WR-7 pinout, AP7380-36WR-7 application, or AP7380-36WR-7 equivalent, key selection criteria include dropout performance at 150mA, thermal shutdown threshold (+160°C), EN pin logic thresholds (2.0V high / 0.4V low), and compatibility with 1µF ceramic output capacitors in SOT25-WR package layouts.

Technical Context

The AP7380-36WR-7 integrates a precision voltage reference, error amplifier, resistor network for fixed 3.6V output, current-limit protection (150mA typical), thermal shutdown circuitry (+160°C trip with +20°C hysteresis), and an active-high enable input. Its architecture supports stable operation with low-ESR ceramic capacitors and maintains ±0.5% load regulation over 1–150mA output current.

It achieves ultra-low quiescent current (1.8µA at I_OUT = 0) and standby current (0.01µA in EN-OFF mode), making it suitable for always-on subsystems. The device exhibits ±100ppm/°C output voltage temperature coefficient across –40°C to +125°C junction temperature range.

Key Specifications

Pinout & Package

SOT25-WR package: 5-pin surface-mount outline with exposed pad (non-electrical), 3.0mm × 1.7mm footprint, 1.1mm height, matte tin-plated leads, moisture sensitivity level 1 per J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3602E/TO and XC6206P362MR-G, the AP7380-36WR-7 uniquely combines 24V input tolerance, active enable, and thermal protection - critical for robustness in industrial and portable equipment where input transients and thermal management are primary concerns.

Availability

AP7380-36WR-7 is available at Aetrix Electronics and suitable for USB-powered peripherals, portable medical devices, and industrial data loggers requiring stable component supply with long-term manufacturability and RoHS-compliant packaging.

Supply support for AP7380-36WR-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 AP7380 series belongs to Diodes' precision ULDO regulator product line, engineered specifically for battery-sensitive and wide-input applications where low dropout, ultra-low I_Q, and thermal resilience are non-negotiable.

FAQ

What is the minimum input voltage required for regulation at 3.6V output?

The AP7380-36WR-7 requires a minimum input voltage of 3.5V to maintain regulation. At 150mA load, dropout is 1050mV (typ), so VIN must be ≥4.65V to sustain full 3.6V output. Below 3.5V, the device enters dropout and VOUT drops linearly with VIN.

Can the AP7380-36WR-7 operate without an enable signal connected?

Yes - the EN pin is internally pulled down. Leaving EN unconnected defaults the device to OFF state. To enable regulation, EN must be actively driven to ≥2.0V. No external pull-up is required, but a 100kΩ pull-up to VIN is recommended if GPIO control is unavailable.

Is the SOT25-WR package thermally enhanced compared to SOT25-W5?

Yes - the WR variant has lower θ_JA (166°C/W vs. 193°C/W for W5) and significantly lower θ_JC (26°C/W vs. 68°C/W), indicating superior heat transfer from die to case due to optimized leadframe design and thermal pad structure, improving power handling in compact layouts.

Does the AP7380-36WR-7 require input and output capacitors?

Yes - a minimum 1.0µF ceramic capacitor is required on both input and output pins, placed within 5mm of the device. Omitting either capacitor risks instability, oscillation, or failure to regulate under load transients, as confirmed by Diodes' application testing in DS39196 Rev. 4-2.