Diodes Incorporated PT7M8216B25XZE

Overview

PT7M8216B25XZE from Pericom Semiconductor is a 2.5V 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 limiting, and auto output discharge-designed for power-sensitive portable RF and baseband circuits.

For engineers reviewing the PT7M8216B25XZE datasheet, PT7M8216B25XZE pinout, PT7M8216B25XZE application, or PT7M8216B25XZE equivalent, key selection criteria include guaranteed 300mA load capability under 150mV dropout, high-PSRR noise suppression in compact UDFN packages, stable operation with minimal 0.47µF X5R/X7R ceramics, and EN-controlled sequencing in space-constrained mobile SoC power domains.

Technical Context

The PT7M8216B25XZE employs a P-channel MOSFET pass device with internal phase compensation optimized for stability with 0.47µF low-ESR ceramic capacitors on both input and output. Its error amplifier compares a trimmed bandgap reference against the feedback network (factory-set for 2.5V output) to regulate voltage within ±2% initial tolerance and ±100ppm/°C temperature drift.

Enable control is active-high (VENH ≥1.2V), with sub-1µA standby current when disabled. Protection circuitry includes foldback current limiting (400mA typical trip), thermal shutdown at 170°C with 20°C hysteresis, and integrated output discharge path (50Ω typical) to rapidly deplete VOUT upon disable-critical for multi-rail sequencing in battery-powered devices.

Key Specifications

Pinout & Package

PT7M8216B25XZE is packaged in Pb-free, RoHS-compliant UDFN-4L (1mm × 1mm) and UDFN-4L (0.8mm × 0.8mm) variants, both with wettable flank terminations for automated optical inspection. The pinout is identical across packages.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B251MR-G and RT9013-25GB, PT7M8216B25XZE delivers superior PSRR and integrated discharge functionality in a smaller 0.8mm×0.8mm option-making it optimal for noise-sensitive, space-constrained portable RF and imaging subsystems requiring fast, controlled power sequencing.

Availability

PT7M8216B25XZE is available at Aetrix Electronics and suitable for mobile baseband power, RF transceiver bias, digital still camera core, and portable medical sensor hub applications requiring stable component supply, long-term lifecycle assurance, and traceable green packaging.

Supply support for PT7M8216B25XZE 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) specializes in high-performance interface, timing, and power management ICs for communications, computing, and consumer electronics.

The PT7M8216 series targets ultra-compact, low-noise power regulation in portable wireless devices-designed to replace legacy LDOs with tighter accuracy, higher PSRR, and smaller UDFN footprints while maintaining compatibility with standard 0.47µF ceramic capacitors.

FAQ

What is the recommended output capacitor for PT7M8216B25XZE?

A 0.47µF X5R or X7R ceramic capacitor placed as close as possible to the VOUT and GND pins is required for stability and optimal transient response. Larger values (e.g., 1µF) may be used but do not improve regulation; ESR must remain below 100mΩ. Tantalum or electrolytic capacitors are not recommended due to instability risk.

Can PT7M8216B25XZE operate with an input voltage below 1.7V?

No. The absolute minimum input voltage is 1.7V per datasheet specifications. Operation below this level risks improper regulation, increased dropout, or complete shutdown. For sub-1.7V applications, consider specialized ultra-low-VIN LDOs such as the Torex XC6206 series, which supports down to 0.9V input.

Is the NC pin (Pin 5) required to be grounded?

Grounding Pin 5 is recommended for mechanical robustness and EMI mitigation, but the datasheet explicitly states that leaving it open is acceptable. No electrical function is assigned to this pin; connecting it to GND does not affect regulation performance or protection features.

How does the auto output discharge feature behave during EN deactivation?

When EN is pulled low, the internal 50Ω discharge path activates between VOUT and GND, collapsing the output voltage to <100mV within ~100µs (typical). This prevents back-feeding into upstream supplies and ensures safe, deterministic power-down sequencing-critical in multi-rail systems with strict voltage monotonicity requirements.