Diodes Incorporated PT7M8216B33XZEX

Overview

PT7M8216B33XZEX from Pericom Semiconductor is a 3.3V 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 digital baseband circuits.

For engineers reviewing the PT7M8216B33XZEX datasheet, PT7M8216B33XZEX pinout, PT7M8216B33XZEX application, or PT7M8216B33XZEX equivalent, key selection criteria include guaranteed 300mA load capability under 1.7–5.5V input, UDFN-4L 1mm×1mm footprint constraints, EN pin high-active control timing, and stable regulation with minimal external capacitance in space-constrained mobile subsystems.

Technical Context

The PT7M8216B33XZEX uses a P-channel MOSFET pass element with internal phase compensation optimized for stability with 0.47µF X5R/X7R ceramic capacitors on both input and output. Its error amplifier compares a trimmed bandgap reference against the regulated 3.3V output, enabling tight line/load regulation (±0.2%/V and ±30mV) across -40°C to +85°C.

EN pin logic is CMOS-compatible with 1.2V high threshold and sub-0.1µA leakage; when pulled low, it disables the regulator and activates a 50Ω internal discharge path to VOUT. Thermal protection triggers at 170°C with 20°C hysteresis, and current limit is set at 400mA typical before foldback.

Key Specifications

Pinout & Package

PT7M8216B33XZEX is housed in a Pb-free, green-compliant 4-pin UDFN package measuring 1.0mm × 1.0mm × 0.5mm (max), with wettable flank leads for automated optical inspection. The bottom-side thermal pad is electrically connected to GND.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B332MR-G and RT9013-33PQW, PT7M8216B33XZEX uniquely combines UDFN-4L 1mm×1mm packaging, 75dB PSRR, 36µA IQ, and integrated 50Ω output discharge - making it optimal for space-constrained, noise-sensitive, and fast-sequencing portable RF and imaging subsystems.

Availability

PT7M8216B33XZEX is available at Aetrix Electronics and suitable for mobile RF front-end power, digital baseband I/O regulation, portable camera module supply, and wearable sensor hub applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PT7M8216B33XZEX 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 analog and mixed-signal ICs for timing, connectivity, and power management in communications and computing markets.

The PT7M8216 series was engineered specifically for ultra-compact, low-noise, high-PSRR power regulation in next-generation mobile handsets and portable multimedia devices demanding minimal footprint and precise voltage control.

FAQ

What is the recommended input and output capacitor configuration for PT7M8216B33XZEX?

Use 0.47µF X5R or X7R ceramic capacitors for both input (VIN-to-GND) and output (VOUT-to-GND), placed as close as possible to their respective pins. These values ensure stability, transient response, and PSRR performance per the datasheet; larger values do not improve regulation and may degrade startup behavior.

Does PT7M8216B33XZEX require an external resistor divider for output voltage setting?

No - PT7M8216B33XZEX is a factory-trimmed fixed-output device delivering 3.3V ±2%. It contains no external feedback pins; the output voltage is set internally via laser trimming during production and cannot be adjusted externally.

How does the EN pin behave during power-up and power-down sequences?

The EN pin is high-active with 1.2V threshold; asserting EN ≥1.2V enables regulation with typical turn-on time of 20µs. Deasserting EN ≤0.3V disables the pass transistor and activates the 50Ω internal discharge path, clearing VOUT to GND in <100µs - critical for controlled power sequencing in multi-rail systems.

Can PT7M8216B33XZEX operate reliably with a 2.8V input supplying 3.3V output?

No - minimum input voltage is VOUT + dropout. At 300mA load, dropout exceeds 150mV; with 3.3V output, VIN must be ≥3.45V to maintain regulation. At 2.8V input, the device enters dropout, causing unregulated output collapse and potential instability - use only within 1.7–5.5V input range with adequate headroom.