Diodes Incorporated PT7M8218B10CE

Overview

PT7M8218B10CE 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-designed for power management in portable RF and digital baseband circuits.

For engineers reviewing the PT7M8218B10CE datasheet, PT7M8218B10CE pinout, PT7M8218B10CE application, or PT7M8218B10CE equivalent, key selection criteria include PSRR (75dB @ 1kHz), ultra-low quiescent current (36µA), auto output discharge, thermal shutdown (170°C), and SC70-5L package compatibility with space-constrained mobile designs.

Technical Context

The PT7M8218B10CE integrates a P-channel MOSFET pass element, internal reference voltage source, error amplifier with phase compensation, and EN-controlled on/off logic. Its architecture enables stable regulation with low-ESR ceramic capacitors without external compensation.

It delivers precise 2.8V output across –40°C to +85°C ambient, maintains 75dB ripple rejection at 1kHz, and features active current limiting (400mA typical) and thermal shutdown with 20°C hysteresis-ensuring robustness under transient overload and thermal stress.

Key Specifications

Pinout & Package

PT7M8218B10CE is packaged in SC70-5L (JEDEC MO-203B/AA), a 2.2mm × 1.35mm surface-mount package with 0.65mm pitch, optimized for high-density portable PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with XC6219B282MR-G and RT9193-28GB, PT7M8218B10CE uniquely combines high PSRR, auto-discharge, and EN control in SC70-5L-making it optimal for battery-powered RF and imaging systems demanding precision, low noise, and intelligent power management.

Availability

PT7M8218B10CE is available at Aetrix Electronics and suitable for mobile phones, digital cameras, Bluetooth modules, and portable medical devices requiring stable component supply with full traceability and long-term lifecycle support.

Supply support for PT7M8218B10CE 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 analog/mixed-signal IC designer specializing in high-performance timing, interface, and power management solutions for communications and consumer electronics.

PT7M8218 belongs to Pericom's high-PSRR, low-I_Q LDO family-engineered specifically for noise-sensitive RF and portable digital applications where battery efficiency and signal integrity are critical.

FAQ

What is the minimum input voltage required for stable 2.8V output at 300mA?

The PT7M8218B10CE requires VIN ≥ VOUT + VDROPOUT. At 300mA, dropout rises to ~200mV (per load curve extrapolation); thus, minimum VIN is 3.0V. For guaranteed 300mA operation, use VIN ≥ 3.1V per datasheet derating guidelines.

Can the NC pin (Pin 4) be left floating in production design?

Yes-datasheet explicitly states Pin 4 (NC) may be left open, but recommends connection to GND for improved mechanical reliability and reduced EMI susceptibility. No electrical function is affected either way.

Does the auto output discharge feature activate during thermal shutdown?

No-the auto discharge path engages only when EN is driven low. During thermal shutdown, the pass transistor turns off but the discharge FET remains inactive; VOUT decays only via external load or capacitor leakage.

Is the 0.47µF output capacitor requirement valid for both X5R and X7R dielectrics?

Yes-datasheet specifies "X5R/X7R" ceramic types. Both meet the low-ESR (<100mΩ) and capacitance stability requirements across –40°C to +85°C needed for loop stability and PSRR performance.