Diodes Incorporated PT7M8216B09XZEX

Overview

PT7M8216B09XZEX from Pericom Semiconductor is a 300mA, high-PSRR, low-noise LDO regulator with fixed 0.9V output, 150mV dropout at 150mA (V_OUT=2.8V), ±2% initial accuracy, and stable operation with 0.47µF ceramic output capacitors. It features auto output discharge, thermal shutdown, current limit protection, and operates across –40°C to +85°C in a 1mm×1mm UDFN-4L package - used for powering baseband processors and RF ICs in space-constrained mobile devices.

For engineers reviewing the PT7M8216B09XZEX datasheet, PT7M8216B09XZEX pinout, PT7M8216B09XZEX application, or PT7M8216B09XZEX equivalent, key selection criteria include dropout voltage at 300mA load, PSRR performance above 70dB at 1kHz, quiescent current under 40µA, and compatibility with tiny 0.8mm×0.8mm or 1mm×1mm UDFN packages for ultra-thin portable electronics.

Technical Context

The PT7M8216B09XZEX integrates a P-channel MOSFET pass element, error amplifier with internal phase compensation, reference voltage source, and EN-controlled on/off circuitry. Its architecture enables stability with low-ESR 0.47µF X5R/X7R ceramic capacitors on both input and output sides without requiring external compensation.

It delivers regulated 0.9V output with 100ppm/°C temperature coefficient, 60µV_RMS output noise (10Hz–100kHz), and 75dB PSRR at 1kHz - critical for noise-sensitive analog and RF subsystems. The EN pin is high-active, with V_ENH ≥1.2V and V_ENL ≤0.3V, supporting precise power sequencing in multi-rail systems.

Key Specifications

Pinout & Package

PT7M8216B09XZEX is housed in a Pb-free, green 4-pin UDFN-4L package measuring 1.0mm × 1.0mm × 0.5mm (max). The package uses bottom-side thermal pad for enhanced heat dissipation and supports reflow soldering per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B092MR-G and RT9013-09GB, PT7M8216B09XZEX offers superior PSRR (75dB vs. ≤65dB), integrated auto-discharge (reducing BOM count), and smaller 1mm×1mm UDFN footprint - making it optimal for noise-critical, space-constrained mobile designs where fast turn-off and minimal residual voltage matter.

Availability

PT7M8216B09XZEX is available at Aetrix Electronics and suitable for mobile baseband power, RF front-end bias, digital camera sensor core, and wearable health monitor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PT7M8216B09XZEX 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) is a fabless provider of high-performance analog and mixed-signal ICs, specializing in timing, interface, and power management solutions for communications and consumer electronics.

The PT7M8216 series was designed specifically for ultra-compact, low-noise power regulation in battery-powered mobile devices - emphasizing tiny footprint, high PSRR, and precision enable control for advanced power sequencing.

FAQ

What is the minimum input voltage required for stable 0.9V output at 300mA?

The PT7M8216B09XZEX requires VIN ≥ VOUT + VDROPOUT. With 150mV dropout specified at 150mA for higher-output variants, and typical dropout scaling linearly, the device maintains regulation down to ~1.05V input at full 300mA load. Absolute minimum VIN is 1.7V per datasheet operating condition - below which regulation is not guaranteed.

Can the NC pin (Pin 5) be left unconnected?

Yes - Pin 5 is designated NC (No Connect) and may be left floating. The datasheet explicitly states "leaving it open is also acceptable," though connecting it to GND is preferred for mechanical stability and EMI reduction. No internal circuitry connects to this pin; it serves only as a structural pad in the UDFN package.

Does PT7M8216B09XZEX require an input capacitor?

Yes - a 0.47µF ceramic capacitor (X5R/X7R) is required between VIN and GND, placed as close as possible to Pins 4 and 2. This stabilizes the input rail against transient current demands and prevents oscillation due to wiring inductance, especially critical when powered from switch-mode supplies or long PCB traces.

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

When EN is pulled LOW, the internal 50Ω discharge path between VOUT and GND activates, discharging the output capacitor within tens of microseconds depending on COUT value. For a 0.47µF capacitor, VOUT falls from 0.9V to <100mV in <25µs - ensuring rapid rail collapse for safe power-down sequencing and preventing back-powering of upstream circuitry.