Diodes Incorporated PT7M8216B28XYE

Overview

PT7M8216B28XYE from Pericom Semiconductor is a 2.8V 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 PT7M8216B28XYE datasheet, PT7M8216B28XYE pinout, PT7M8216B28XYE application, or PT7M8216B28XYE equivalent, key selection criteria include ultra-small footprint compatibility, guaranteed 300mA load capability with ceramic capacitors ≥0.47µF, EN-controlled sequencing, and thermal/current protection for battery-powered mobile subsystems.

Technical Context

The PT7M8216B28XYE integrates a P-channel MOSFET pass element, precision bandgap reference, error amplifier with internal phase compensation, and enable-controlled shutdown logic. Its architecture supports stable regulation with only 0.47µF X5R/X7R ceramic input and output capacitors.

It delivers high PSRR (75dB @ 1kHz) and low output noise (60µV_RMS, 10Hz–100kHz), while maintaining ±100ppm/°C temperature coefficient and operating across –40°C to +85°C ambient range. Protection includes thermal shutdown at 170°C and foldback current limiting.

Key Specifications

Pinout & Package

PT7M8216B28XYE is housed in a lead-free, green-compliant 0.8mm×0.8mm UDFN-4L package with wettable flank terminations for automated optical inspection (AOI). The package has no exposed pad and requires standard reflow profiles for Pb-free soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6206P282MR and RT9193-28GB, PT7M8216B28XYE offers the smallest footprint (0.8×0.8mm), lowest dropout (150mV), and integrated auto-discharge - making it optimal for next-gen miniaturized RF and imaging subsystems where size, efficiency, and sequencing control are critical.

Availability

PT7M8216B28XYE is available at Aetrix Electronics and suitable for mobile phone baseband power, RF transceiver bias, digital camera sensor core, and portable audio codec applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PT7M8216B28XYE 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, computing, and consumer electronics before its 2016 acquisition.

PT7M8216 belongs to Pericom's ultra-low-noise, miniature-package LDO family engineered specifically for battery-powered portable devices demanding minimal footprint, high PSRR, and precise voltage regulation under dynamic load conditions.

FAQ

What is the minimum recommended output capacitor value and dielectric type for stable operation?

The PT7M8216B28XYE is specified to operate stably with a 0.47µF X5R or X7R ceramic capacitor on V_OUT. Lower values may cause instability or excessive overshoot during load transients. The capacitor must be placed within 2mm of the V_OUT and GND pins, with short, low-inductance traces to ground.

Does PT7M8216B28XYE require an input capacitor, and if so, what value and type?

Yes - a 0.47µF X5R/X7R ceramic capacitor is required on V_IN to suppress high-frequency noise and ensure stability during line transients. It must be placed adjacent to the V_IN and GND pins. Larger values (e.g., 1µF) are acceptable but do not improve regulation performance beyond the specified minimum.

How does the EN pin behave during power-down, and what is the output discharge path resistance?

When EN is pulled low, the regulator disables and activates an internal 50Ω discharge path from V_OUT to GND, reducing V_OUT to <0.1V within ~1ms (typical) for 10µF load capacitance. This prevents floating outputs that could cause latch-up or improper reset sequencing in downstream logic.

Can PT7M8216B28XYE be used with input voltages below 1.7V?

No - the absolute minimum input voltage is 1.7V per datasheet specifications. Operation below this threshold risks unregulated output, increased dropout, or failure to start up. For sub-1.7V applications, consider alternative LDOs with ultra-low VIN capability or buck-boost regulators.