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

Diodes Incorporated PT7M8218B12TAEX

Name: PT7M8218B12TAEX
Brand: Diodes Incorporated
SKU: PT7M8218B12TAEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7M8218B12TAEX

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: PT7M8218B12TAEX.pdf

Description:: IC REG LINEAR 1.2V 300MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Inventory:3,450

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Product details

Overview

PT7M8218B12TAEX 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 digital systems including GSM/CDMA baseband ICs and camera sensor rails.

For engineers reviewing the PT7M8218B12TAEX datasheet, PT7M8218B12TAEX pinout, PT7M8218B12TAEX application, or PT7M8218B12TAEX equivalent, key selection criteria include guaranteed 300mA load capability with 0.47µF ceramic output capacitance, auto-discharge functionality, thermal shutdown at 170°C, and EN pin compatibility with 1.2V logic-high threshold.

Technical Context

The PT7M8218B12TAEX integrates a P-channel MOSFET pass element, internal reference, error amplifier with phase compensation, and protection circuitry - enabling stable regulation with low-ESR ceramic capacitors without external compensation. Its architecture supports fast transient response and low-noise operation critical for RF front-end biasing.

It operates across 1.7V–5.5V input range while maintaining 2.8V output with ±100ppm/°C temperature coefficient and 60µV_RMS output noise (10Hz–100kHz). The EN pin enables system-level power sequencing with 0.05µA standby current and 50Ω internal discharge path.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±2% - factory-trimmed for precision biasing of baseband processors and RF ICs.
Max Output Current	300mA - sufficient to power dual-core application processors or multi-sensor modules in compact handheld devices.
Dropout Voltage	150mV @ 150mA - enables operation from single-cell Li-ion (3.0V min) down to 2.95V under load.
PSRR	75dB @ 1kHz - suppresses switching noise from DC-DC converters feeding adjacent analog/RF circuitry.
Quiescent Current	36µA - minimizes battery drain during idle states in always-on sensor nodes and standby modes.
Operating Temp	−40°C to +85°C - qualified for consumer and industrial portable equipment environments.
Output Capacitor	0.47µF ceramic (X5R/X7R) - eliminates need for bulky tantalum or electrolytic capacitors, reducing board area.

Pinout & Package

PT7M8218B12TAEX is packaged in lead-free, green-compliant SOT23-5L (JEDEC MO-178C/AA), measuring 2.82mm × 1.50mm × 1.05mm, with gull-wing leads optimized for automated assembly and thermal performance in space-constrained 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 for stability and noise rejection.
2 - GND	Power ground reference	Low-impedance return path for regulator core and output stage; must be connected directly to PCB ground plane.
3 - EN	Enable control input	Logic-high active (≥1.2V); pulls output to GND via 50Ω internal discharge when low; floating state increases quiescent current.
4 - NC	No-connect terminal	Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction.
5 - VOUT	Regulated output	Delivers stable 2.8V; requires 0.47µF ceramic capacitor to GND within 2mm for optimal transient response.

Key Features

Feature	Design Value
Auto Output Discharge	50Ω internal discharge path ensures rapid VOUT decay on disable - prevents back-powering of downstream circuits.
High PSRR	75dB at 1kHz enables clean LDO operation even when powered from noisy DC-DC outputs or shared PMIC rails.
Low Dropout	150mV @ 150mA allows extended battery runtime by sustaining regulation until cell voltage drops below 2.95V.
Thermal Shutdown	170°C trip point with 20°C hysteresis prevents latch-up and enables safe recovery after overload or poor heatsinking.
Stable with Small Caps	0.47µF ceramic output capacitor eliminates need for large bulk capacitance - reduces BOM cost and footprint.

Applications

Mobile Baseband Power

GSM/CDMA Transceiver Bias

Use Scenario: Powering baseband processor I/O and memory interface rails in dual-mode smartphones.

IC Role / Device Role / Timing Role: Primary LDO supplying 2.8V to SDIO, UART, and GPIO banks with tight voltage tolerance.

Use Value: ±2% output accuracy ensures reliable signal integrity and timing margin compliance for high-speed digital interfaces.

Use Scenario: Providing clean bias voltage to RF transceiver ICs in PDC/GSM handsets.

IC Role / Device Role / Timing Role: Noise-suppressing post-regulator for VCO, LNA, and mixer supply domains.

Use Value: 75dB PSRR at 1kHz attenuates switching ripple from adjacent buck converters, preserving EVM and receiver sensitivity.

Digital Camera Sensor Rail

Portable Audio Codec Supply

Use Scenario: Delivering regulated 2.8V to CMOS image sensor analog front-end and ADC reference.

IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled from digital subsystems.

Use Value: 60µV_RMS output noise (10Hz–100kHz) prevents fixed-pattern noise and SNR degradation in high-resolution imaging.

Use Scenario: Powering stereo audio codecs in MP3 players and voice recorders.

IC Role / Device Role / Timing Role: Dedicated low-quiescent-current supply for DAC/ADC and headphone drivers.

Use Value: 36µA quiescent current extends playback time in battery-operated audio devices without compromising THD+N.

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, 200mV dropout @ 100mA, no EN pin, 45µA IQ	Lacks enable control and auto-discharge; suitable only for always-on rails	Select when system-level power sequencing is unnecessary and board space permits larger output cap (1µF).
Richtek RT9193-28GB	300mA, 180mV dropout @ 150mA, 65dB PSRR @ 1kHz, 50µA IQ	Lower PSRR and higher dropout reduce noise immunity and battery efficiency in RF-critical designs	Prefer when cost is primary constraint and PSRR >70dB is not required for adjacent RF sections.

Compared with XC6206P282MR and RT9193-28GB, PT7M8218B12TAEX delivers superior PSRR and integrated EN-controlled discharge - making it optimal for RF-sensitive, battery-constrained portable systems requiring precise sequencing and fast turn-off.

Availability

PT7M8218B12TAEX is available at Aetrix Electronics and suitable for mobile baseband power, GSM/CDMA transceiver bias, digital camera sensor rails, and portable audio codec supply requiring stable component supply with full traceability and lifecycle management.

Supply support for PT7M8218B12TAEX 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.

This device belongs to Pericom's PT7M series of ultra-low-noise, high-PSRR LDOs - engineered specifically for noise-sensitive RF and portable multimedia applications demanding precision regulation and minimal board footprint.

FAQ

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

The PT7M8218B12TAEX requires VIN ≥ VOUT + V_DROP, where V_DROP is 180mV for VOUT ≤2.7V and 150mV for 2.8V output at 150mA. At full 300mA, dropout rises slightly; per datasheet curves, stable operation begins at VIN ≥ 3.0V. Below that, output collapses under full load.

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 improves mechanical reliability during reflow and reduces potential EMI coupling; this is recommended for high-volume manufacturing.

Does the auto-discharge function activate only when EN is pulled low?

Yes - the 50Ω internal discharge path between VOUT and GND engages exclusively when EN is driven ≤0.3V. When EN is high or floating, discharge is disabled. Floating EN increases quiescent current and risks unintended shutdown due to noise coupling.

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

Yes - the datasheet explicitly specifies X5R or X7R ceramic types. Both meet the low-ESR (<100mΩ) and stable capacitance-vs-voltage requirements needed for loop stability. Avoid Y5V or Z5U due to excessive capacitance loss under DC bias.

PT7M8218B12TAEX Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: SC-74A, SOT-753

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):: 1.2V

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:: SOT-23-5

PT7M8218B12TAEX FAQ

1.How can I place an order for PT7M8218B12TAEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7M8218B12TAEX 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 PT7M8218B12TAEX reliable?

The price and inventory of PT7M8218B12TAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B12TAEX is usually 5 days.

3.What payment methods are accepted for PT7M8218B12TAEX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B12TAEX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT7M8218B12TAEX?

PT7M8218B12TAEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7M8218B12TAEX 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 PT7M8218B12TAEX?

For technical support, including PT7M8218B12TAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B12TAEX requirements.

6.How does Aetrix verify that PT7M8218B12TAEX is sourced from the original manufacturer or authorized distributors?

All PT7M8218B12TAEX 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 PT7M8218B12TAEX meets industry standards.

7.What is the process for return or replacement of PT7M8218B12TAEX?

All PT7M8218B12TAEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B12TAEX, 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 PT7M8218B12TAEX part is unused and in its original packaging.

Return procedure for PT7M8218B12TAEX:

1.Submit a request within 90 days.

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

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