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

Diodes Incorporated PT7M8218B30CEX

Name: PT7M8218B30CEX
Brand: Diodes Incorporated
SKU: PT7M8218B30CEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7M8218B30CEX

Manufacturer:: Diodes Incorporated

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

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

Datasheet:: PT7M8218B30CEX.pdf

Description:: IC REG LINEAR 3V 300MA SC70-5

Quantity:: RFQ Add To RFQ list

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Inventory:3,351

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Product details

Overview

PT7M8218B30CEX from Pericom Semiconductor is a 300mA, high-PSRR low-dropout linear regulator with 3.0V fixed output voltage, ±2% initial accuracy, 150mV dropout at 150mA (V_OUT=2.8V), and stable operation with 0.47µF ceramic output capacitors. It serves as a precision power supply for noise-sensitive analog and RF circuitry in portable wireless devices.

For engineers reviewing the PT7M8218B30CEX datasheet, PT7M8218B30CEX pinout, PT7M8218B30CEX application, or PT7M8218B30CEX equivalent, key selection criteria include guaranteed 300mA output current, 75dB PSRR at 1kHz, auto output discharge, thermal shutdown at 170°C, and compatibility with SC70-5L footprint for space-constrained designs.

Technical Context

The PT7M8218B30CEX uses a P-channel MOSFET pass element controlled by an internal error amplifier and reference voltage source, enabling low dropout and high DC accuracy. Its integrated phase compensator ensures stability with low-ESR 0.47µF X5R/X7R ceramic capacitors on both input and output.

Enable control is active-high (EN pin), with defined logic thresholds (V_ENH ≥ 1.2V, V_ENL ≤ 0.3V) and ultra-low standby current (≤1µA). Protection includes foldback current limiting (400mA typical) and thermal shutdown with 20°C hysteresis.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 3.0V ±2% initial accuracy - ensures stable core voltage for 3.0V I/O domains without external feedback.
Max Output Current	300mA guaranteed - supports moderate-power RF transceivers and baseband processors in mobile handsets.
Dropout Voltage	150mV @ 150mA (V_OUT=2.8V) - enables operation down to 3.15V input, extending battery runtime in single-cell Li-ion systems.
PSRR	75dB @ 1kHz - suppresses switching noise from adjacent DC/DC converters feeding noisy system rails.
Quiescent Current	36µA typical - minimizes no-load power loss in always-on subsystems like real-time clocks or sensor interfaces.
Operating Temp	–40°C to +85°C - qualified for consumer and industrial portable equipment environments.
Capacitor Support	Stable with 0.47µF ceramic (X5R/X7R) - eliminates need for bulk tantalum or aluminum electrolytic, reducing board area and cost.

Pinout & Package

PT7M8218B30CEX is packaged in SC70-5L (JEDEC MO-203B/AA), a 1.2mm × 2.1mm surface-mount package with 0.65mm pitch, optimized for high-density portable PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Input supply rail	Accepts 1.7–5.5V; requires local 0.47µF ceramic bypass to GND to maintain PSRR and transient response.
2 - GND	Power ground reference	Low-impedance return path for all internal circuits; must be connected directly to system ground plane.
3 - EN	Active-high enable control	Drives regulator ON when ≥1.2V; pulls output to GND via internal 50Ω discharge resistor when disabled.
4 - NC	No-connect terminal	Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction.
5 - VOUT	Regulated output	Delivers 3.0V ±2%; requires 0.47µF ceramic capacitor to GND within 2mm for stability and noise filtering.

Key Features

Feature	Design Value
Auto Output Discharge	50Ω internal discharge path activates on EN deactivation - prevents floating output during power sequencing and meets fast turn-off requirements in multi-rail systems.
High PSRR at 1kHz	75dB rejection of ripple from upstream switchers - preserves signal integrity in audio codecs and RF front-ends.
Thermal Shutdown	170°C trip point with 20°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures.
Low Dropout Architecture	P-channel MOSFET pass device - eliminates need for external bias supply and simplifies layout vs. N-channel LDOs.
Factory-Trimmed Accuracy	±2% over line/load/temp - reduces need for post-production calibration in battery-powered instrumentation.

Applications

Cellular Baseband Power

RF Transceiver Bias

Use Scenario: Powers baseband processor I/O banks in GSM/CDMA handsets operating from single-cell Li-ion (3.0–4.2V).

IC Role / Device Role / Timing Role: Primary 3.0V LDO delivering clean, regulated voltage to digital interface circuitry with tight voltage tolerance.

Use Value: ±2% accuracy and 75dB PSRR prevent data corruption during burst transmission and ensure reliable SDIO/UART timing margins.

Use Scenario: Supplies bias voltage to RF power amplifiers and low-noise amplifiers in PDC/IMT2000 modules.

IC Role / Device Role / Timing Role: Low-noise, high-PSRR voltage source isolating sensitive RF analog stages from noisy digital supply rails.

Use Value: 60µV_RMS output noise and 150mV dropout extend PA efficiency and improve receiver sensitivity under varying battery conditions.

Digital Camera Sensor Core

Portable Audio Codec Supply

Use Scenario: Provides regulated 3.0V to CMOS image sensor analog front-end and ADC reference in DSCs and camcorders.

IC Role / Device Role / Timing Role: Precision analog supply with low thermal drift (±100ppm/°C) for consistent pixel response across temperature.

Use Value: Stable 3.0V output and <10mV load regulation minimize fixed-pattern noise and banding artifacts in captured images.

Use Scenario: Powers stereo audio DAC and headphone amplifier in MP3 players and Bluetooth headsets.

IC Role / Device Role / Timing Role: Ultra-low-noise LDO supplying analog audio path while rejecting switching noise from display backlight drivers.

Use Value: 60µV_RMS noise and 75dB PSRR reduce audible hiss and improve SNR >95dB in 16-bit playback.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6219B302MR	300mA, 3.0V, 25µA IQ, SC70-5 - lower quiescent current but 65dB PSRR at 1kHz	Lacks auto-discharge; requires external pulldown for controlled shutdown	Preferred where ultra-low standby power dominates over noise rejection.
Richtek RT9193-30GB	300mA, 3.0V, 80µA IQ, SOT23-5 - higher PSRR (80dB@1kHz) but larger SOT23-5 footprint	Includes soft-start; no auto-discharge function	Chosen when superior ripple rejection is critical and board space allows SOT23-5.

Compared with XC6219B302MR and RT9193-30GB, PT7M8218B30CEX uniquely balances 75dB PSRR, 36µA IQ, auto-discharge, and SC70-5L size-making it optimal for compact, noise-sensitive, fast-sequencing portable designs requiring minimal external components.

Availability

PT7M8218B30CEX is available at Aetrix Electronics and suitable for cellular baseband power, RF transceiver bias, digital camera sensor core, and portable audio codec supply requiring stable component supply across production lifecycles.

Supply support for PT7M8218B30CEX 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 and consumer electronics before its 2016 acquisition.

The PT7M8218 series was designed specifically for space-constrained, battery-powered wireless devices demanding high PSRR, low IQ, and robust thermal protection in sub-2mm packages.

FAQ

What is the minimum input voltage required for PT7M8218B30CEX to regulate 3.0V output?

The minimum input voltage is 3.15V under 150mA load, based on its 150mV dropout specification at that condition. At lighter loads (e.g., 30mA), dropout drops below 100mV, allowing stable regulation down to ~3.05V. Input must remain ≥1.7V per absolute maximum ratings, but regulation only occurs above V_OUT + V_DROP.

Does PT7M8218B30CEX require an external resistor divider to set output voltage?

No. PT7M8218B30CEX is a fixed-output regulator with factory-trimmed 3.0V output. The "B30" suffix explicitly denotes the 3.0V variant; no external feedback network is needed or supported. Output voltage is not adjustable via external components.

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

Yes - the NC pin is internally unconnected and may be left floating per datasheet guidance. However, tying it to GND is recommended for mechanical reinforcement, improved thermal conduction, and reduced EMI susceptibility in high-frequency layouts.

How does the auto output discharge function behave during EN deactivation?

When EN is pulled low, the internal 50Ω discharge path between VOUT and GND activates immediately, discharging the output capacitor within tens of microseconds. This prevents residual voltage from interfering with downstream logic reset sequences or causing latch-up in powered-down peripherals.

PT7M8218B30CEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 3V

Voltage - Output (Max):: -

Voltage Dropout (Max):: 0.15V @ 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

PT7M8218B30CEX FAQ

1.How can I place an order for PT7M8218B30CEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7M8218B30CEX 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 PT7M8218B30CEX reliable?

The price and inventory of PT7M8218B30CEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B30CEX is usually 5 days.

3.What payment methods are accepted for PT7M8218B30CEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B30CEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT7M8218B30CEX?

PT7M8218B30CEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7M8218B30CEX 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 PT7M8218B30CEX?

For technical support, including PT7M8218B30CEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B30CEX requirements.

6.How does Aetrix verify that PT7M8218B30CEX is sourced from the original manufacturer or authorized distributors?

All PT7M8218B30CEX 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 PT7M8218B30CEX meets industry standards.

7.What is the process for return or replacement of PT7M8218B30CEX?

All PT7M8218B30CEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B30CEX, 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 PT7M8218B30CEX part is unused and in its original packaging.

Return procedure for PT7M8218B30CEX:

1.Submit a request within 90 days.

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

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