Diodes Incorporated AP2127N-1.0TRG1

Overview

AP2127N-1.0TRG1 from Diodes Incorporated is a 300mA, 1.0V fixed-output CMOS low-dropout (LDO) regulator in SOT-23 package, featuring 140mV dropout at 300mA, ±2% output voltage accuracy, and 60μVRMS output noise - optimized for powering core logic rails in space-constrained battery-powered systems including notebook CPU I/O, PMIC auxiliary supplies, and FPGA configuration banks.

For engineers reviewing the AP2127N-1.0TRG1 datasheet, AP2127N-1.0TRG1 pinout, AP2127N-1.0TRG1 application, or AP2127N-1.0TRG1 equivalent, key selection criteria include ultra-low quiescent current (60μA typ), 68dB PSRR at 1kHz, thermal shutdown with +165°C trip point, and compatibility with 1μF ceramic input/output capacitors without external compensation.

Technical Context

The AP2127N-1.0TRG1 employs a P-channel MOSFET pass element enabling low dropout operation across its 2.5V–6V input range, with internal 0.8V reference and precision error amplifier delivering ±2% output regulation over load (1mA–300mA), line (2.5V–6V), and temperature (−40°C to +85°C). Its shutdown control pin enables 0.1μA standby mode with integrated 60Ω VOUT-to-GND discharge path.

Designed for stability with minimal external components, it operates reliably with 1μF X7R/X5R MLCCs on both input and output, leveraging inherent phase margin optimization - no ESR requirements or feed-forward capacitor needed for the fixed 1.0V version, unlike adjustable variants.

Key Specifications

Pinout & Package

SOT-23 package: 3-pin surface-mount, 2.9mm × 1.6mm footprint, 1.1mm height, thermally enhanced plastic body with gull-wing leads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1002E/TT and XC6206P102MR-G, the AP2127N-1.0TRG1 uniquely balances 300mA drive, 140mV dropout, and 60μA IQ in the compact SOT-23 package - making it the only option among the three capable of powering modern 1.0V digital subsystems without compromising size, efficiency, or thermal margin.

Availability

AP2127N-1.0TRG1 is available at Aetrix Electronics and suitable for notebook computers, datacom modules, and motherboard power management requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant green packaging.

Supply support for AP2127N-1.0TRG1 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 ICs, with leadership in power management, signal integrity, and protection solutions for industrial, computing, and consumer markets.

The AP2127 Series belongs to Diodes' high-performance LDO portfolio designed specifically for noise-sensitive, battery-critical applications - emphasizing ultra-low noise, fast transient response, and minimal external component count in miniature packages.

FAQ

What is the minimum input voltage required for AP2127N-1.0TRG1 to maintain regulation at 300mA load?

The AP2127N-1.0TRG1 requires a minimum input voltage of 1.14V to sustain 1.0V output at 300mA, based on its 140mV typical dropout voltage. However, the absolute minimum specified operating input is 2.5V per datasheet recommendations - ensuring guaranteed performance across temperature, process variation, and line regulation. Below 2.5V, functionality is not characterized.

Can AP2127N-1.0TRG1 be used with tantalum output capacitors?

No - the AP2127N-1.0TRG1 is explicitly characterized and stabilized for use with 1μF or greater X7R/X5R ceramic capacitors only. Tantalum capacitors exhibit higher ESR and different frequency response, which may compromise phase margin and cause oscillation. Diodes' datasheet confirms stability exclusively with low-ESR MLCCs and does not validate tantalum alternatives.

Does AP2127N-1.0TRG1 include reverse polarity protection?

No - the AP2127N-1.0TRG1 lacks integrated reverse-voltage protection. Applying negative voltage to VIN or VOUT relative to GND exceeds absolute maximum ratings and risks permanent damage. External protection (e.g., series Schottky diode on VIN) is required in systems where input reversal is possible, such as hot-swap or battery-reversal scenarios.

Is the shutdown pin of AP2127N-1.0TRG1 internally pulled up or down?

The shutdown pin is not internally biased - it is a high-impedance CMOS input requiring explicit logic-level control. The datasheet specifies VIH = 1.5V min and VIL = 0.5V max, with no internal pull-up or pull-down resistor. To ensure defined state during power-up or floating conditions, an external 100kΩ pull-up to VIN or pull-down to GND must be implemented per system reset architecture.