Diodes Incorporated AP7361C-10ER-13

Overview

AP7361C-10ER-13 from Diodes Incorporated is a 1A fixed-output (1.0V) ultra-low dropout linear regulator with enable, designed for power rail regulation in space-constrained portable and battery-powered systems. It delivers ±1% output accuracy, 360mV dropout at 1A (for 3.3V variant; 1.0V variant exhibits 710mV typical dropout at 300mA), 60µA quiescent current, and integrates thermal shutdown, fold-back short-circuit protection (400mA), and current limiting (1.5A). It is used in LCD-TV power rails requiring stable low-voltage biasing.

For engineers reviewing the AP7361C-10ER-13 datasheet, AP7361C-10ER-13 pinout, AP7361C-10ER-13 application, or AP7361C-10ER-13 equivalent, key selection criteria include dropout voltage at 1.0V output, EN pin logic thresholds (VIH = 1.0V min), thermal resistance of TO252-R package (95°C/W), stability with ≥2.2µF MLCC output capacitors, and compatibility with 2.2–6.0V input sources.

Technical Context

The AP7361C-10ER-13 implements a PMOS pass transistor architecture enabling ultra-low dropout operation and high PSRR (75dB @ 1kHz). Its internal 0.8V bandgap reference feeds an error amplifier that regulates output via feedback from the ADJ/NC pin - unused in fixed 1.0V configuration but retained as no-connect in this variant.

Enable control is implemented with active-high logic (VIH ≥ 1.0V, VIL ≤ 0.3V), and the device features fold-back current limiting that reduces short-circuit current to ~400mA while maintaining thermal shutdown at ~150°C with 20°C hysteresis. It operates across –40°C to +85°C ambient and remains stable with ceramic, tantalum, or electrolytic output capacitors ≥2.2µF.

Key Specifications

Pinout & Package

AP7361C-10ER-13 is packaged in TO252-R (DPAK-R), a thermally enhanced variant with reversed pinout (Pin 1: GND, Pin 2: OUT, Pin 3: IN) and exposed thermal pad for improved heat dissipation (θJA = 95°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1002E/MB, AP7361C-10ER-13 delivers 3.3× higher current and integrated thermal protection; versus XC6210B102MR-G, it trades slightly higher dropout for robust TO252-R thermal performance and automotive-grade qualification readiness.

Availability

AP7361C-10ER-13 is available at Aetrix Electronics and suitable for LCD-TV power management, set-top box subsystem regulation, and home appliance microcontroller core supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for AP7361C-10ER-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 manufacturer of discrete semiconductors and analog ICs, specializing in power management, signal integrity, and protection solutions for industrial, consumer, and computing markets.

The AP7361C belongs to Diodes' high-performance LDO family targeting battery-powered and space-constrained applications where ultra-low dropout, low IQ, and robust fault protection are mandatory design requirements.

FAQ

Is AP7361C-10ER-13 compatible with ceramic output capacitors smaller than 2.2µF?

No. The datasheet explicitly specifies ≥2.2µF ceramic capacitance for guaranteed stability across temperature and load conditions. Using smaller values risks oscillation or poor transient response, especially under dynamic loads above 100mA. X5R/X7R dielectrics are recommended for stable ESR over temperature.

What is the maximum allowable input voltage for AP7361C-10ER-13?

The absolute maximum input voltage is 6.5V, but the recommended operating range is 2.2V to 6.0V. Exceeding 6.0V risks accelerated parametric drift and reduced long-term reliability, even if thermal limits are not breached. For 1.0V output, inputs above 4.0V increase power dissipation significantly without functional benefit.

Does AP7361C-10ER-13 require an external resistor divider for 1.0V operation?

No. The "-10" suffix denotes factory-trimmed fixed 1.0V output; the ADJ pin is internally connected and functions as NC (no connection) in this variant. External resistors are only required for adjustable versions (e.g., AP7361C-ADJ); adding them to the -10 variant would disrupt regulation.

How does the TO252-R (DR) package differ electrically from standard TO252 (D)?

TO252-R reverses the pinout (GND/OUT/IN vs. IN/GND/OUT) but maintains identical electrical specifications, thermal resistance (95°C/W), and current capability. The reversal simplifies PCB layout in designs where ground routing dominates the top layer, allowing direct thermal pad connection to internal ground planes without signal crossovers.