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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Diodes Incorporated PT7M8218B18CE

Name: PT7M8218B18CE
Brand: Diodes Incorporated
SKU: PT7M8218B18CE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7M8218B18CE

Manufacturer:: Diodes Incorporated

Category:: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators

Package:: 5-TSSOP, SC-70-5, SOT-353

Datasheet:: PT7M8218B18CE.pdf

Description:: IC REG LINEAR 1.8V 300MA SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:3,889

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Product details

Overview

PT7M8218B18CE 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 75dB PSRR at 1kHz-designed for power-sensitive portable RF and imaging subsystems in mobile handsets.

For engineers reviewing the PT7M8218B18CE datasheet, PT7M8218B18CE pinout, PT7M8218B18CE application, or PT7M8218B18CE equivalent, key selection criteria include guaranteed 300mA load capability with 0.47µF ceramic output capacitance, auto-discharge functionality, thermal shutdown at 170°C, and dual SC70-5L/SOT23-5L package support.

Technical Context

The PT7M8218B18CE integrates a P-channel MOSFET pass element, precision bandgap reference, error amplifier with internal phase compensation, and EN-controlled logic circuitry. Its architecture enables stable regulation with ultra-low ESR ceramic capacitors and supports fast transient response under dynamic load conditions.

It delivers regulated 2.8V output across 1.7–5.5V input range while maintaining 36µA quiescent current and 0.02%/V line regulation. Protection features include foldback current limiting (400mA typical), short-circuit current limit (40mA), and thermal shutdown with 20°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±2% at 30mA; ensures stable core voltage for baseband processors and RF ICs without external feedback.
Max Output Current	300mA guaranteed; supports burst-mode operation in GSM/CDMA transceivers and camera sensor modules.
Dropout Voltage	150mV @ 150mA (V_OUT=2.8V); enables efficient operation down to 2.95V input in battery-powered systems.
PSRR	75dB @ 1kHz; suppresses switching noise from PMICs or DC-DC converters feeding adjacent analog circuits.
Quiescent Current	36µA typical; minimizes standby power loss in always-on audio codecs and Bluetooth radios.
Operating Temp	−40°C to +85°C; qualified for consumer handset and industrial portable equipment environments.
Capacitor Support	Stable with 0.47µF X5R/X7R ceramic output capacitor; eliminates need for bulk tantalum or electrolytic caps.

Pinout & Package

PT7M8218B18CE is available in SC70-5L (JEDEC MO-203B/AA) and SOT23-5L (JEDEC MO-178C/AA) packages-both 5-pin surface-mount formats with identical pin assignment and thermal performance up to 125°C junction temperature.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Input supply rail	Accepts 1.7–5.5V; requires local 0.47µF ceramic bypass to GND for stability and noise rejection.
2 - GND	Power ground reference	Low-impedance return path for regulator loop; must be connected directly to PCB ground plane.
3 - EN	Enable control input	High-active logic interface (1.2V threshold); enables zero-current shutdown and automatic output discharge.
4 - NC	No-connect terminal	Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction.
5 - VOUT	Regulated output	Delivers 2.8V ±2%; requires 0.47µF ceramic capacitor to GND within 2mm of pin for transient response.

Key Features

Feature	Design Value
Auto Output Discharge	Internal 50Ω discharge path activates when EN = LOW, ensuring rapid VOUT decay to prevent back-powering downstream circuitry.
Low Dropout Architecture	P-channel MOSFET pass device eliminates body diode conduction, enabling true reverse-current blocking and clean shutdown behavior.
Thermal Shutdown Protection	Turns off output at 170°C junction temperature with 20°C hysteresis, preventing latch-up during sustained overload or poor heatsinking.
High Accuracy Trim	Factory-trimmed output voltage achieves ±2% initial tolerance over temperature and line/load, reducing system-level calibration overhead.
Ultra-Low Noise	60µV_RMS integrated noise (10Hz–100kHz); preserves SNR in analog front-ends for audio DACs and RF synthesizers.

Applications

Mobile Baseband Power

GSM/CDMA Transceiver Bias

Use Scenario: Supplies 2.8V to baseband processor I/O banks and memory interfaces in dual-mode handsets.

IC Role / Device Role / Timing Role: Primary LDO delivering clean, low-noise power with fast load transient recovery during burst transmission.

Use Value: Maintains 2.8V ±30mV under 100mA step loads (20µs rise time), preventing digital logic glitches during modem state transitions.

Use Scenario: Powers RF front-end ICs including power amplifiers and low-noise amplifiers in PDC/GSM/CDMA handsets.

IC Role / Device Role / Timing Role: Low-PSRR LDO isolating sensitive RF analog blocks from noisy digital supply rails.

Use Value: 75dB PSRR at 1kHz rejects switching artifacts from PMIC buck converters, preserving receiver sensitivity by >3dB.

Digital Camera Sensor Core

Bluetooth Audio Codec Supply

Use Scenario: Provides regulated 2.8V to CMOS image sensor analog core and ADC reference in compact DSCs and camcorders.

IC Role / Device Role / Timing Role: Precision LDO with ±2% accuracy and 60µV_RMS noise supporting high-fidelity image capture.

Use Value: Enables <1 LSB INL error in 12-bit image sensor ADCs by limiting output ripple to <200µV_PP at full load.

Use Scenario: Supplies 2.8V to Bluetooth audio codec ICs in wireless headsets and speaker docks.

IC Role / Device Role / Timing Role: Low-quiescent-current LDO supporting always-on audio monitoring and wake-on-voice functions.

Use Value: 36µA ISS enables >100-hour standby on 100mAh battery while maintaining fast EN turn-on (<100µs) for voice activation.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6206P282MR	280mA max output, 250mV dropout @ 150mA, no EN pin, 50µA IQ	Lacks enable control and auto-discharge; unsuitable for sequenced power-down in multi-rail systems	Select only if EN functionality and fast shutdown are not required and board space permits larger 1.0µF output cap.
Richtek RT9193-28GB	300mA output, 200mV dropout @ 150mA, 65dB PSRR @ 1kHz, 45µA IQ	Lower PSRR and higher quiescent current reduce noise immunity in RF-sensitive designs	Prefer when cost is primary constraint and 10dB PSRR margin is acceptable for non-critical analog supplies.

Compared with XC6206P282MR and RT9193-28GB, PT7M8218B18CE uniquely combines 300mA drive, 75dB PSRR, EN-controlled auto-discharge, and 0.47µF ceramic stability-making it optimal for RF-critical, space-constrained portable designs requiring precise sequencing and low noise.

Availability

PT7M8218B18CE is available at Aetrix Electronics and suitable for mobile handset power management, digital camera sensor biasing, Bluetooth audio subsystems, and cordless phone RF modules requiring stable component supply across production lifecycles.

Supply support for PT7M8218B18CE 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 communications, computing, and consumer electronics before its 2016 acquisition.

The PT7M8218 belongs to Pericom's precision LDO family targeting portable RF and imaging applications-designed for minimal board area, low noise, and seamless integration into multi-rail power architectures.

FAQ

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

The PT7M8218B18CE requires VIN ≥ VOUT + VDROPOUT = 2.8V + 150mV = 2.95V to maintain regulation at 150mA. At full 300mA, dropout rises to ~180mV per datasheet curves, so minimum VIN is 2.98V. Below this, output collapses linearly with input.

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

Yes-Pin 4 is internally unconnected and may float, but Pericom recommends tying it to GND for mechanical reinforcement and reduced EMI susceptibility. Floating does not affect regulation or reliability, but grounded placement improves thermal dissipation and board-level robustness.

Does the auto-discharge feature activate during normal operation or only at shutdown?

Auto-discharge activates exclusively when EN is driven LOW (≤0.3V). It does not engage during normal regulation or transient events. The internal 50Ω discharge path pulls VOUT to GND within ~1ms after EN deactivation, preventing backflow into powered-down circuitry.

Is the 0.47µF output capacitor requirement strict for all load conditions?

Yes-the 0.47µF X5R/X7R ceramic capacitor is mandatory for stability across 1–300mA loads and −40°C to +85°C. Larger values (e.g., 1µF) do not harm stability but offer no benefit; smaller values risk oscillation. Tantalum or aluminum electrolytics are incompatible due to ESR and phase margin degradation.

PT7M8218B18CE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: 5-TSSOP, SC-70-5, SOT-353

Packaging:: Bulk

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 1.8V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.18V @ 150mA (Typ)

Current - Output:: 300mA

Current - Quiescent (Iq):: 50 µA

Current - Supply (Max):: -

PSRR:: 75dB (1kHz)

Control Features:: Enable

Protection Features:: Over Current, Over Temperature

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SC-70-5

PT7M8218B18CE FAQ

1.How can I place an order for PT7M8218B18CE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7M8218B18CE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for PT7M8218B18CE reliable?

The price and inventory of PT7M8218B18CE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B18CE is usually 5 days.

3.What payment methods are accepted for PT7M8218B18CE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B18CE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT7M8218B18CE?

PT7M8218B18CE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7M8218B18CE order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for PT7M8218B18CE?

For technical support, including PT7M8218B18CE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B18CE requirements.

6.How does Aetrix verify that PT7M8218B18CE is sourced from the original manufacturer or authorized distributors?

All PT7M8218B18CE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that PT7M8218B18CE meets industry standards.

7.What is the process for return or replacement of PT7M8218B18CE?

All PT7M8218B18CE units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B18CE, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The PT7M8218B18CE part is unused and in its original packaging.

Return procedure for PT7M8218B18CE:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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