Diodes Incorporated PT7M8218B10TAEX

Overview

PT7M8218B10TAEX from Pericom Semiconductor is a 300mA, high-PSRR low-dropout linear regulator with 2.8V fixed output voltage, ±2% initial accuracy, 150mV dropout at 150mA, 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 SOT23-5L package for power management in portable RF and digital systems.

For engineers reviewing the PT7M8218B10TAEX datasheet, PT7M8218B10TAEX pinout, PT7M8218B10TAEX application, or PT7M8218B10TAEX equivalent, key selection criteria include guaranteed 300mA load capability, 75dB PSRR at 1kHz, 36µA quiescent current, EN pin control logic, and compatibility with low-ESR ceramic capacitors in space-constrained mobile designs.

Technical Context

The PT7M8218B10TAEX integrates a P-channel MOSFET pass element, precision bandgap reference, error amplifier with internal phase compensation, and enable-controlled ON/OFF circuitry. Its architecture supports stable regulation with minimal external components-only input and output 0.47µF X5R/X7R ceramic capacitors required.

Protection functions are implemented via dedicated analog circuits: thermal shutdown triggers at 170°C with 20°C hysteresis, while current limiting activates at 400mA (short-circuit limit 40mA). The EN pin is CMOS-compatible with 1.2V high-threshold and sub-1µA leakage in both states.

Key Specifications

Pinout & Package

SOT23-5L package: 2.82–3.02 mm × 1.50–1.70 mm footprint, 1.05–1.25 mm height, 0.95 mm lead pitch, JEDEC MO-178C/AA compliant.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6206P282MR and RT9193-28GB, PT7M8218B10TAEX delivers superior PSRR (75dB), lower dropout (150mV), and integrated EN-controlled discharge-making it optimal for battery-powered RF and imaging systems requiring tight voltage regulation and fast power sequencing.

Availability

PT7M8218B10TAEX is available at Aetrix Electronics and suitable for cellular baseband power, GSM/CDMA RF front-end bias, and digital still camera sensor applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PT7M8218B10TAEX 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.

The PT7M8218 belongs to Pericom's ultra-low-noise LDO family designed specifically for noise-sensitive RF, imaging, and portable multimedia applications where PSRR, dropout, and quiescent current are critical.

FAQ

What is the maximum input voltage rating for PT7M8218B10TAEX?

The absolute maximum input voltage is +6.0V per the datasheet. Continuous operation above 5.5V violates recommended conditions and risks permanent damage. For reliable 2.8V output, VIN must remain between 1.7V and 5.5V, with 2.95V minimum to maintain regulation at full 300mA load due to 150mV dropout.

Does PT7M8218B10TAEX require an external resistor network to set output voltage?

No. PT7M8218B10TAEX is a fixed-output regulator with factory-trimmed 2.8V output. The "B10" suffix denotes the 2.8V variant (per Table 1: "28" = 2.8V, top marking "n"). No external feedback resistors are needed, simplifying layout and eliminating resistor tolerance errors.

Can PT7M8218B10TAEX operate with a 1µF ceramic output capacitor instead of 0.47µF?

Yes-larger ceramic capacitors (e.g., 1µF X5R/X7R) are acceptable and improve transient response, but the device is specifically characterized and guaranteed stable with ≥0.47µF. Using significantly smaller values (<0.33µF) or high-ESR types (e.g., aluminum electrolytic) may cause oscillation or poor PSRR performance.

Is the NC pin (Pin 4) required to be grounded?

Grounding Pin 4 is recommended per the datasheet for mechanical stability and EMI suppression, though leaving it open is functionally acceptable. Floating this pin increases susceptibility to noise coupling and may degrade PSRR in high-frequency environments; tying to GND minimizes parasitic antenna effects without affecting regulation.