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

Diodes Incorporated PT7M8218B28TAE

Name: PT7M8218B28TAE
Brand: Diodes Incorporated
SKU: PT7M8218B28TAE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7M8218B28TAE

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: PT7M8218B28TAE.pdf

Description:: IC REG LINEAR 2.8V 300MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PT7M8218B28TAE from Pericom Semiconductor is a 300mA, high-PSRR low-dropout linear regulator with 2.8V fixed output, ±2% initial accuracy, 150mV dropout at 150mA, and 75dB PSRR at 1kHz. It operates from 1.7V to 5.5V input and delivers stable power to noise-sensitive RF and digital baseband circuits in portable wireless devices.

For engineers reviewing the PT7M8218B28TAE datasheet, PT7M8218B28TAE pinout, PT7M8218B28TAE application, or PT7M8218B28TAE 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 PT7M8218B28TAE integrates a P-channel MOSFET pass element, internal reference voltage source, error amplifier with phase compensation, and protection circuitry for overcurrent and thermal events. Its architecture enables stability with ultra-low-ESR 0.47µF X5R/X7R ceramic capacitors on both input and output.

Control is implemented via an active-high EN pin (1.2V logic threshold) that enables fast turn-on/turn-off response and initiates automatic output discharge when disabled. The device maintains ±100ppm/°C output voltage temperature coefficient across –40°C to +85°C ambient operation.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±2% initial accuracy - ensures precise biasing of 2.8V-tolerant RF ICs and baseband processors.
Max Output Current	300mA guaranteed - supports peak current demands of GSM/CDMA transceivers and camera sensor modules.
Dropout Voltage	150mV @ 150mA - enables regulation from 2.95V input down to 2.8V output, extending battery runtime in single-cell Li-ion systems.
PSRR	75dB @ 1kHz - suppresses switching noise from DC-DC converters feeding adjacent analog/RF circuitry.
Quiescent Current	36µA typical - minimizes standby power loss in always-on mobile subsystems like Bluetooth LE radios.
Operating Temp	–40°C to +85°C - qualified for consumer handheld and industrial portable equipment environments.
Noise	60µV_RMS (10Hz–100kHz) - preserves signal integrity in audio codec and ADC reference supply paths.

Pinout & Package

PT7M8218B28TAE is packaged in RoHS-compliant, lead-free SOT23-5L (JEDEC MO-178C/AA) - a 2.9mm × 1.6mm surface-mount package with 0.95mm pitch, optimized for space-constrained mobile PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Power Input	Regulator input supply (1.7–5.5V); requires local 0.47µF X5R/X7R ceramic bypass to GND for stability.
2 - GND	Ground Reference	Analog and power ground return; must be low-impedance connection shared with input/output capacitor grounds.
3 - EN	Enable Control	Active-high logic input (1.2V min high, 0.3V max low); controls startup/shutdown and triggers internal output discharge.
4 - NC	No Connect	Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction.
5 - VOUT	Regulated Output	2.8V regulated output; requires local 0.47µF X5R/X7R ceramic capacitor to GND for transient response and PSRR performance.

Key Features

Feature	Design Value
Ultra-Low-ESR Capacitor Support	Stable with 0.47µF ceramic output cap - eliminates need for costly tantalum or polymer capacitors and reduces BOM count.
Auto Output Discharge	Internal 50Ω discharge path activates on EN deassertion - prevents floating output during power sequencing and avoids latch-up in downstream logic.
High Accuracy Trim	±2% initial VOUT tolerance - reduces need for external calibration in precision analog subsystems such as camera ISPs and RF front-ends.
Integrated Protection	Thermal shutdown (170°C) + current limit (400mA typ.) - enables robust operation under short-circuit or overload without external circuitry.
Low Noise Architecture	60µV_RMS integrated noise - meets stringent supply ripple requirements for high-resolution audio DACs and low-phase-noise PLLs.

Applications

Cellular Transceiver Power

Digital Camera Sensor Bias

Use Scenario: Supplies clean 2.8V bias to GSM/CDMA/IMT2000 RF transceivers during burst transmission.

IC Role / Device Role / Timing Role: Primary LDO for RF IC core and PA bias rails, rejecting switching noise from system PMIC.

Use Value: 75dB PSRR at 1kHz prevents AM modulation of RF carrier by DC-DC ripple, maintaining ACLR compliance.

Use Scenario: Powers CMOS image sensor analog front-end and ISP core in compact digital still/video cameras.

IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering stable 2.8V to sensor pixel array and analog signal chain.

Use Value: 60µV_RMS noise and 150mV dropout enable full dynamic range capture without fixed-pattern noise artifacts.

PDA Baseband Processor Core

MP3 Player Audio Codec Supply

Use Scenario: Provides regulated 2.8V supply to ARM9/ARM11 application processor cores in legacy PDAs.

IC Role / Device Role / Timing Role: Main core voltage regulator with EN-controlled power gating for deep-sleep mode entry/exit.

Use Value: 36µA quiescent current and auto-discharge reduce system standby power to <1µA, extending battery life between sync sessions.

Use Scenario: Supplies 2.8V reference and analog section of stereo audio DAC/codec in portable MP3 players.

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

Use Value: ±2% output accuracy and <10mV load regulation ensure THD+N remains below 0.01% across volume and battery voltage ranges.

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 @ 100mA, no EN pin, 50µA IQ	Lacks enable control and auto-discharge; unsuitable for sequenced power-down	Select only if EN functionality and fast shutdown are not required.
Richtek RT9193-28GB	300mA output, 200mV dropout @ 150mA, 65dB PSRR @ 1kHz, 45µA IQ	Lower PSRR and higher quiescent current; no auto-discharge	Prefer for cost-sensitive designs where 10dB PSRR margin is acceptable.

Compared with XC6206P282MR and RT9193-28GB, PT7M8218B28TAE uniquely combines 300mA drive, 75dB PSRR, EN-controlled auto-discharge, and 36µA IQ - making it optimal for RF-critical, battery-powered mobile applications requiring tight sequencing and low noise.

Availability

PT7M8218B28TAE is available at Aetrix Electronics and suitable for cellular transceivers, digital camera sensors, PDA baseband processors, and portable audio codecs requiring stable component supply with consistent parametric performance across production lots.

Supply support for PT7M8218B28TAE 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 computing markets before its 2017 acquisition.

The PT7M8218 belongs to Pericom's precision LDO family designed specifically for noise-sensitive portable wireless applications - emphasizing PSRR, low IQ, small footprint, and seamless integration with ceramic capacitors.

FAQ

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

The PT7M8218B28TAE requires VIN ≥ VOUT + VDROPOUT. At 300mA, dropout rises to ~200mV (per load regulation curve), so minimum VIN is 3.0V. For guaranteed 300mA operation, use VIN ≥ 3.0V - though 2.95V may suffice under nominal conditions.

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

Yes, Pin 4 is internally unconnected and may float per datasheet, but Pericom recommends tying it to GND to improve mechanical reliability, reduce parasitic antenna effects, and minimize EMI coupling into adjacent signal traces on dense mobile PCBs.

Does PT7M8218B28TAE require an input capacitor?

Yes - a 0.47µF X5R/X7R ceramic capacitor is required at VIN to GND. It stabilizes the input impedance, suppresses high-frequency noise from upstream sources, and prevents oscillation during load transients, especially critical when powered from switchers or long PCB traces.

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

When EN is pulled low, the internal 50Ω discharge path connects VOUT to GND, discharging the output capacitor within ~1ms (for 0.47µF). This prevents residual voltage from holding downstream logic in undefined states and eliminates need for external bleed resistors in power-sequencing designs.

PT7M8218B28TAE Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

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

Packaging:: Bulk

Product Status:: Obsolete

Output Configuration:: Positive

Output Type:: Fixed

Number of Regulators:: 1

Voltage - Input (Max):: 5.5V

Voltage - Output (Min/Fixed):: 2.8V

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:: SOT-23-5

PT7M8218B28TAE FAQ

1.How can I place an order for PT7M8218B28TAE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7M8218B28TAE 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 PT7M8218B28TAE reliable?

The price and inventory of PT7M8218B28TAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B28TAE is usually 5 days.

3.What payment methods are accepted for PT7M8218B28TAE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B28TAE transactions.

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4.How is shipping managed for PT7M8218B28TAE?

PT7M8218B28TAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7M8218B28TAE 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 PT7M8218B28TAE?

For technical support, including PT7M8218B28TAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B28TAE requirements.

6.How does Aetrix verify that PT7M8218B28TAE is sourced from the original manufacturer or authorized distributors?

All PT7M8218B28TAE 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 PT7M8218B28TAE meets industry standards.

7.What is the process for return or replacement of PT7M8218B28TAE?

All PT7M8218B28TAE units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B28TAE, 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 PT7M8218B28TAE part is unused and in its original packaging.

Return procedure for PT7M8218B28TAE:

1.Submit a request within 90 days.

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

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