Diodes Incorporated AP2202K-3.0TRE1

Overview

AP2202K-3.0TRE1 from Diodes Incorporated is a 150mA ultra-low dropout (ULDO) linear regulator with fixed 3.0V output, ±1% accuracy, 165mV typical dropout at full load, 75dB PSRR at 100Hz, and 1µA maximum standby current. It operates from 2.5V to 13.2V input, features logic-compatible enable control, reverse current protection, thermal shutdown, and overcurrent protection-designed for RF power supply rails in battery-powered handheld devices.

For engineers reviewing the AP2202K-3.0TRE1 datasheet, AP2202K-3.0TRE1 pinout, AP2202K-3.0TRE1 application, or AP2202K-3.0TRE1 equivalent, key selection criteria include low-noise operation for RF ICs, sub-200mV dropout under 150mA load, shutdown current <1µA, SOT-23-5 footprint compatibility, and guaranteed ±1% output voltage accuracy across -40°C to +125°C.

Technical Context

The AP2202K-3.0TRE1 uses a P-channel MOSFET pass element enabling ultra-low dropout and eliminating reverse current flow without external diodes. Its bandgap reference and error amplifier deliver tight line/load regulation (≤4mV and ≤7mV respectively) and low temperature coefficient (120µV/°C).

Internal protection circuitry includes foldback current limiting (320–550mA), thermal shutdown activation at +150°C junction temperature, and CMOS/TTL-compatible enable input with 0.4V logic-low threshold and 2.0V logic-high threshold-supporting precise system-level power sequencing.

Key Specifications

Pinout & Package

SOT-23-5 package: 2.9mm × 1.6mm × 1.1mm body, lead-free, RoHS-compliant, with exposed thermal pad on bottom (not electrically connected). Pin 2 is GND; Pin 3 is EN; Pin 4 is BYP; Pin 5 is VOUT; Pin 1 is VIN.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MCP1700-3002E/TO and XC6206P302MR, AP2202K-3.0TRE1 uniquely combines 165mV dropout, 75dB PSRR, 1µA shutdown, and dedicated BYP pin-making it optimal for noise-critical, battery-constrained RF and imaging subsystems where headroom and spectral purity are non-negotiable.

Availability

AP2202K-3.0TRE1 is available at Aetrix Electronics and suitable for cellular handset RF power rails, wireless sensor node MCU supplies, digital still camera image sensor bias, and PDA/palmtop baseband processor cores requiring stable component supply across production lifecycles.

Supply support for AP2202K-3.0TRE1 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 for power management, signal integrity, and connectivity applications.

The AP2202 series belongs to Diodes' precision low-noise LDO portfolio, engineered specifically for battery-powered and RF-sensitive systems where ultra-low dropout, high PSRR, and minimal quiescent current are mandatory design requirements.

FAQ

What is the minimum input voltage required for AP2202K-3.0TRE1 to maintain regulation at 150mA load?

The minimum input voltage is 3.165V, calculated as V_OUT + V_DROP = 3.0V + 0.165V. This ensures the output remains within ±1% accuracy under full load at +25°C. For robust operation across temperature and process variation, Diodes recommends using V_IN ≥ V_OUT + 0.5V (i.e., ≥3.5V) to accommodate worst-case dropout and line regulation effects.

Can AP2202K-3.0TRE1 be used without the BYP capacitor?

Yes, but performance degrades: omitting the 100pF BYP-to-GND capacitor reduces PSRR by up to 20dB above 10kHz and increases output noise by ~3×. The BYP pin connects to an internal noise-filtering node; its omission compromises low-noise operation critical for RF and imaging applications per the datasheet's Typical Applications Circuit.

Does AP2202K-3.0TRE1 support reverse polarity protection on the input?

No. AP2202K-3.0TRE1 lacks integrated reverse-polarity protection; applying negative voltage to VIN can damage the device. External protection (e.g., series Schottky diode or ideal diode controller) is required if input reversal is possible. However, it does provide integrated reverse *current* protection between VOUT and VIN, preventing backfeed when VOUT > VIN.

How does thermal shutdown behave during sustained overload?

When junction temperature exceeds +150°C, the device enters thermal shutdown, disabling the pass transistor and reducing VOUT to near zero. It remains latched off until TJ falls below +135°C (typical hysteresis), then automatically resumes regulation. This cycle repeats under continuous overload, protecting against permanent damage while allowing safe recovery once cooling occurs.