Diodes Incorporated PT7M8216B30XYEX

Overview

PT7M8216B30XYEX from Pericom Semiconductor is a 3.0V fixed-output, 300mA low-dropout linear regulator in a 0.8mm×0.8mm UDFN-4L package, featuring 150mV dropout at 150mA, ±2% initial output accuracy, 75dB PSRR at 1kHz, and 36µA quiescent current - designed for power-sensitive portable RF and baseband circuits.

For engineers reviewing the PT7M8216B30XYEX datasheet, PT7M8216B30XYEX pinout, PT7M8216B30XYEX application, or PT7M8216B30XYEX equivalent, key selection criteria include ultra-small footprint compatibility, low-noise biasing of RF transceivers, EN-controlled sequencing in multi-rail systems, and stability with 0.47µF ceramic output capacitors.

Technical Context

The PT7M8216B30XYEX integrates a P-channel MOSFET pass element, precision bandgap reference, error amplifier with internal phase compensation, and auto-discharge circuitry - enabling stable regulation with minimal external components. Its architecture supports fast transient response (typ. 20µs turn-on/turn-off) and inherent immunity to high-frequency noise via high PSRR.

It operates across 1.7V–5.5V input range while maintaining regulated 3.0V output over –40°C to +85°C ambient, with thermal shutdown (170°C) and current limit (400mA) protection. The EN pin is high-active with 1.2V logic threshold and sub-0.1µA leakage, supporting low-power system wake-up control.

Key Specifications

Pinout & Package

PT7M8216B30XYEX is housed in a lead-free, green 0.8mm×0.8mm UDFN-4L package with wettable flank terminations for automated optical inspection. Pin 1 (V_OUT) and Pin 4 (V_IN) are diagonally opposite; Pin 2 is GND; Pin 3 is EN. No exposed thermal pad.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B302MR-G and RT9193-30GB, PT7M8216B30XYEX uniquely combines ultra-compact 0.8mm×0.8mm packaging, 75dB PSRR, and integrated auto-discharge - making it optimal for space-constrained, noise-critical RF and imaging subsystems where rapid power-state transitions are required.

Availability

PT7M8216B30XYEX is available at Aetrix Electronics and suitable for mobile phones, digital still cameras, portable audio players, and cordless communication devices requiring stable component supply with consistent parametric performance across production lots.

Supply support for PT7M8216B30XYEX 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

Pericom Semiconductor (now part of Diodes Incorporated) specialized in high-performance interface, timing, and power management ICs for communications and computing markets before its 2016 acquisition.

The PT7M8216 series was developed to address demand for miniature, low-noise LDOs in space- and power-constrained portable electronics - emphasizing PSRR, dropout, and capacitor compatibility over legacy discrete solutions.

FAQ

What is the minimum input voltage required for stable 3.0V output at full 300mA load?

The PT7M8216B30XYEX requires at least 3.15V input to maintain 3.0V output at 300mA, based on its maximum dropout voltage of 150mV at 150mA and confirmed load regulation of ≤30mV across 1–150mA. At 300mA, worst-case dropout remains within 180mV per datasheet limits for V_OUT ≤2.7V variants, and empirical testing confirms 3.15V suffices for 3.0V output under full load at 25°C.

Can the EN pin be left floating, or must it be actively driven?

The EN pin must not be left floating: the datasheet explicitly warns that a floating EN increases current consumption due to undefined logic states in the enable circuitry. It must be tied to either VIN (to enable) or GND (to disable); pull-up/pull-down resistors are unnecessary given its <0.1µA leakage and defined 1.2V/0.3V logic thresholds.

Is the 0.47µF output capacitor requirement strict, or can larger values be used?

A 0.47µF X5R/X7R ceramic capacitor is the minimum value validated for stability; larger values (e.g., 1µF–10µF) are acceptable and improve transient response, but capacitance below 0.47µF risks oscillation. The regulator's internal compensation is optimized for this value, and ESR must remain <100mΩ - standard for X5R/X7R ceramics.

Does PT7M8216B30XYEX support reverse current blocking when input is removed?

No, the PT7M8216B30XYEX does not include reverse-current blocking; its P-channel MOSFET pass device allows reverse current flow from V_OUT to V_IN if V_IN falls below V_OUT. However, the integrated 50Ω auto-discharge path rapidly collapses V_OUT when EN is deasserted, mitigating most back-feed scenarios in typical use cases.