Diodes Incorporated AP2127N-1.2TRG1

Overview

AP2127N-1.2TRG1 from Diodes Incorporated is a 300mA, 1.2V fixed-output CMOS low-dropout (LDO) regulator in SOT-23 package, featuring 170mV dropout at 300mA (for V_OUT = 3.3V), ±2% output voltage accuracy, and 60μV_RMS ultra-low noise - designed for powering noise-sensitive analog circuitry and RF sections in portable battery-powered systems.

For engineers reviewing the AP2127N-1.2TRG1 datasheet, AP2127N-1.2TRG1 pinout, AP2127N-1.2TRG1 application, or AP2127N-1.2TRG1 equivalent, key selection criteria include its 2.5V–6V input range, 60μA typical quiescent current, 68dB PSRR at 1kHz, thermal shutdown protection, and compatibility with 1μF ceramic input/output capacitors.

Technical Context

This LDO employs a PMOS pass transistor architecture enabling low dropout and fast transient response. Its internal 0.8V reference feeds a precision error amplifier that regulates output against line, load, and temperature variations.

The device integrates active shutdown control with 0.1μA standby current, auto-discharge MOSFET (R_DS(ON) = 60Ω), over-temperature protection (trip at +165°C), and short-circuit current limiting (50mA). It operates across –40°C to +85°C ambient without external compensation.

Key Specifications

Pinout & Package

SOT-23 package (3-pin, surface-mount) with exposed pad not present; footprint compatible with JEDEC TO-236AB. Thermal resistance θ_JA = 180°C/W (standard PCB layout).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700T-1202E/TT and XC6206P122MR-G, AP2127N-1.2TRG1 uniquely combines 300mA drive, 60μA IQ, integrated shutdown with auto-discharge, and full thermal/short-circuit protection - making it optimal for space-constrained, battery-operated systems requiring robustness and low noise.

Availability

AP2127N-1.2TRG1 is available at Aetrix Electronics and suitable for wearable health monitors, industrial I/O modules, wireless audio transceivers, and automotive body control units requiring stable component supply with consistent parametric performance across temperature and production lots.

Supply support for AP2127N-1.2TRG1 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 AP2127 series belongs to Diodes' high-speed, low-noise LDO product line - engineered specifically for noise-sensitive applications in battery-powered portable electronics where precision regulation and minimal power loss are critical.

FAQ

What is the minimum input voltage required for AP2127N-1.2TRG1 to maintain regulation?

The AP2127N-1.2TRG1 requires VIN ≥ VOUT + VDROP. At 300mA load and 1.2V output, dropout is not explicitly specified in the datasheet for this voltage grade; however, based on the 1.0V version (1400mV dropout), the minimum VIN is conservatively 2.5V - matching the absolute minimum rated input voltage per Recommended Operating Conditions.

Does AP2127N-1.2TRG1 require an external shutdown resistor?

No. The AP2127N-1.2TRG1 in SOT-23 package has no shutdown pin - it is a non-shutdown fixed-output variant. Only SOT-23-5 and SOT-89 versions include a dedicated Shutdown terminal; the SOT-23 (3-pin) version operates continuously when powered.

Can AP2127N-1.2TRG1 be used with a 10μF output capacitor?

Yes. The AP2127N-1.2TRG1 is stable with ceramic capacitors ≥1μF and does not require minimum ESR. A 10μF X7R MLCC improves transient response and reduces output ripple further - especially beneficial for pulsed loads like BLE radio transmission bursts.

Is the AP2127N-1.2TRG1 RoHS-compliant and halogen-free?

Yes. Per Diodes Incorporated documentation, AP2127N-1.2TRG1 is fully RoHS 2 compliant (2011/65/EU), lead-free, and halogen- and antimony-free ("Green" device), containing <900ppm bromine, <900ppm chlorine, and <1000ppm antimony compounds.