Diodes Incorporated PT7M8216B11XZEX

Overview

PT7M8216B11XZEX from Pericom Semiconductor is a 2.85V fixed-output, 300mA low-dropout linear regulator featuring 150mV dropout at 150mA, ±2% initial output accuracy, 75dB PSRR at 1kHz, and ultra-low 36µA quiescent current. It operates from 1.7V to 5.5V input, supports 0.47µF ceramic output capacitors, and integrates thermal shutdown, current limit, and auto output discharge - optimized for space-constrained mobile power rails.

For engineers reviewing the PT7M8216B11XZEX datasheet, PT7M8216B11XZEX pinout, PT7M8216B11XZEX application, or PT7M8216B11XZEX equivalent, key selection criteria include its UDFN-4L 1mm×1mm package, high PSRR in noise-sensitive RF/analog blocks, tight output accuracy over temperature, and EN-controlled sequencing in portable battery-powered systems.

Technical Context

The PT7M8216B11XZEX uses a P-channel MOSFET pass element with internal phase compensation enabling stability with only 0.47µF X5R/X7R ceramic capacitors on input and output. Its error amplifier compares a trimmed bandgap reference against the feedback network (factory-set for 2.85V), delivering fast transient response and minimal load/line regulation drift.

EN pin logic is high-active with 1.2V threshold; when pulled low, it disables the regulator and activates an internal 50Ω discharge path to VOUT. Protection circuitry includes foldback current limiting (400mA typical trip) and thermal shutdown at 170°C with 20°C hysteresis - critical for sustained operation in thermally dense handheld PCBs.

Key Specifications

Pinout & Package

PT7M8216B11XZEX is housed in a Pb-free, green-compliant 4-pin UDFN package measuring 1.0mm × 1.0mm × 0.5mm (max height), with wettable flank leads for automated optical inspection. Thermal pad exposed on bottom enhances heat dissipation in compact layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B282MR-G and RT9013-28GB, PT7M8216B11XZEX delivers superior PSRR and integrated discharge functionality in the smallest footprint - making it optimal for noise-critical, space-constrained RF and imaging subsystems where rapid enable/disable and rail integrity are design priorities.

Availability

PT7M8216B11XZEX is available at Aetrix Electronics and suitable for mobile baseband power, RF transceiver bias, digital camera ISP core, and portable audio codec applications requiring stable component supply, long-term lifecycle support, and traceable green packaging.

Supply support for PT7M8216B11XZEX 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 consumer electronics before its 2016 acquisition.

PT7M8216 belongs to Pericom's ultra-low-noise, miniature LDO family designed specifically for battery-powered portable devices demanding high PSRR, minimal footprint, and robust thermal behavior in thermally constrained environments.

FAQ

What is the exact output voltage tolerance and temperature coefficient of PT7M8216B11XZEX?

The PT7M8216B11XZEX has ±2% initial output voltage accuracy at 25°C and a temperature coefficient of ±100ppm/°C over –40°C to +85°C. This means output variation remains within ±0.057V (±2% of 2.85V) at room temperature and adds ≤±0.0285V drift across the full operating range - verified per DC electrical characteristics table in the official datasheet.

Can PT7M8216B11XZEX operate stably with 0.22µF ceramic output capacitors?

No - the device is characterized and guaranteed stable only with ≥0.47µF X5R or X7R ceramic capacitors (ESR <100mΩ). Using 0.22µF violates the minimum capacitance requirement and risks oscillation or poor transient response, as confirmed in the "Stable with 0.47µF Ceramic Output Capacitors" feature and application circuit guidelines.

Is the NC pin (Pin 5) required to be grounded, or can it float?

Pin 5 is labeled NC (No Connect) and may be left unconnected or tied to GND - both configurations are acceptable per the Pin Assignment table. However, grounding it improves EMI immunity and avoids potential floating-node coupling; leaving it open introduces no functional risk but offers no benefit.

Does PT7M8216B11XZEX support reverse current blocking when VIN < VOUT?

No - the PT7M8216B11XZEX uses a P-channel MOSFET pass device that does not inherently block reverse current. If VIN drops below VOUT (e.g., during hot-swap or battery swap), reverse current can flow from VOUT to VIN unless an external Schottky diode or ideal diode controller is added - this limitation is inherent to its architecture and not mitigated by internal circuitry.