Diodes Incorporated PT7M8216B33XYEX

Overview

PT7M8216B33XYEX from Pericom Semiconductor is a 3.3V fixed-output, 300mA low-dropout linear regulator in a 0.8mm×0.8mm UDFN-4L package, featuring 150mV dropout at 150mA, ±2% output accuracy, 75dB PSRR at 1kHz, and auto output discharge-designed for power management in space-constrained portable RF and baseband circuits.

For engineers reviewing the PT7M8216B33XYEX datasheet, PT7M8216B33XYEX pinout, PT7M8216B33XYEX application, or PT7M8216B33XYEX equivalent, key selection criteria include ultra-small footprint compatibility, low-noise biasing for RF ICs, thermal shutdown behavior under load transients, and EN pin logic compatibility with 1.2V–5.5V control signals.

Technical Context

The PT7M8216B33XYEX integrates a P-channel MOSFET pass element, internal reference, error amplifier with phase compensation, and EN-controlled startup circuitry. Its stability with 0.47µF X5R/X7R ceramic capacitors eliminates need for external compensation networks.

It delivers regulated 3.3V output across 1.7V–5.5V input range, supports 300mA continuous load, and maintains regulation down to 150mV headroom at mid-load-enabling direct battery-to-core-rail conversion in single-cell Li-ion and multi-cell alkaline systems.

Key Specifications

Pinout & Package

PT7M8216B33XYEX is housed in a lead-free, green-compliant 0.8mm×0.8mm UDFN-4L package with wettable flanks and bottom-side thermal pad (non-electrical). Pin 1 is marked by laser etch on top surface; orientation follows standard UDFN pin 1 indicator (top-left corner when notch faces up).

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B332MR-G and RP114K331D-TR-F, PT7M8216B33XYEX uniquely combines sub-1mm² size, 75dB PSRR, and integrated auto-discharge-making it optimal for miniaturized RF and imaging subsystems where noise, space, and controlled power sequencing are jointly critical.

Availability

PT7M8216B33XYEX is available at Aetrix Electronics and suitable for mobile baseband power, RF transceiver bias, digital camera ISP supply, and portable audio codec rail applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.

Supply support for PT7M8216B33XYEX 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 was designed specifically for ultra-compact, low-noise power regulation in portable wireless devices-emphasizing minimal footprint, high PSRR, and robust thermal behavior in thermally dense layouts.

FAQ

What is the minimum input voltage required for stable 3.3V output at 300mA?

The PT7M8216B33XYEX requires at least 3.45V input (3.3V + 150mV dropout) to maintain regulation at 300mA. At lower loads, dropout decreases-e.g., 100mV at 50mA-allowing operation down to 3.4V input in typical usage. Input below 1.7V is prohibited per absolute maximum ratings.

Can the EN pin be left floating, or must it be tied to a defined voltage?

The EN pin must not be left floating: an undefined voltage increases quiescent current and may cause erratic enable/disable behavior. It must be actively driven to VIN (≥1.2V) for ON or GND (≤0.3V) for OFF. If unused, tie directly to VIN for always-on operation or GND for permanently disabled state.

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

The 0.47µF ceramic capacitor is the minimum value validated for stability; larger values (e.g., 1µF–10µF) are acceptable and improve transient response but do not alter loop compensation. Avoid tantalum or aluminum electrolytics-only X5R/X7R ceramics meet the ESR and ESL requirements specified in the datasheet.

Does the thermal shutdown feature latch off or auto-recover after cooling?

Thermal shutdown is non-latching: once junction temperature falls below 150°C (170°C trip minus 20°C hysteresis), the device automatically resumes normal operation without requiring EN toggling. This enables graceful recovery from brief thermal overloads during burst-mode operation.