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

Diodes Incorporated PT7M8218B10TAE

Name: PT7M8218B10TAE
Brand: Diodes Incorporated
SKU: PT7M8218B10TAE
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7M8218B10TAE

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: PT7M8218B10TAE.pdf

Description:: IC REG LINEAR 1V 300MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PT7M8218B10TAE 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 rail stabilization in portable RF and digital baseband subsystems.

For engineers reviewing the PT7M8218B10TAE datasheet, PT7M8218B10TAE pinout, PT7M8218B10TAE application, or PT7M8218B10TAE equivalent, key selection criteria include guaranteed 300mA load capability with 0.47µF ceramic output capacitance, auto output discharge, thermal shutdown at 170°C, and EN-controlled on/off sequencing in space-constrained mobile designs.

Technical Context

The PT7M8218B10TAE integrates a P-channel MOSFET pass element, internal reference voltage source, error amplifier with phase compensation, and protection circuitry including current limit (400mA typ.) and thermal shutdown (170°C with 20°C hysteresis). It operates across 1.7V–5.5V input range while maintaining stable regulation over –40°C to +85°C ambient.

Its architecture enables stable operation with ultra-low-ESR 0.47µF X5R/X7R ceramic capacitors on both input and output, eliminating need for bulk electrolytic or tantalum capacitors. The EN pin provides high-active logic control with sub-1µA standby current and 50Ω internal discharge path when disabled.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.8V ±2% initial accuracy - ensures precise biasing for 2.8V I/O rails or core supplies without external feedback.
Max Output Current	300mA guaranteed - supports moderate-power RF transceivers, camera ISPs, or audio codecs without thermal derating in SOT23-5L.
Dropout Voltage	150mV @ 150mA (V_OUT=2.8V) - enables >95% efficiency at light-to-moderate loads with 3.0V input.
PSRR	75dB @ 1kHz - suppresses switching noise from adjacent DC/DC converters in mixed-signal SoC power domains.
Quiescent Current	36µA typ. - minimizes battery drain during standby in always-on sensor or connectivity modules.
Output Capacitor	Stable with 0.47µF ceramic (X5R/X7R) - reduces PCB area and cost vs. larger tantalum or aluminum electrolytic solutions.
EN Pin Logic	High-active with V_ENH ≥1.2V - simplifies interface to 1.8V/3.3V GPIO without level-shifting.

Pinout & Package

PT7M8218B10TAE is packaged in RoHS-compliant, lead-free SOT23-5L (JEDEC MO-178C/AA), measuring 2.82–3.02mm × 1.50–1.70mm × 1.05–1.25mm, optimized for automated placement and thermal performance in dense portable PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1 - VIN	Power Input	Regulator input supply (1.7–5.5V); requires local 0.47µF ceramic bypass to GND for stability and transient response.
2 - GND	Ground Reference	Analog/digital ground return for error amplifier, reference, and pass transistor - must be low-impedance connection to system ground plane.
3 - EN	Enable Control	High-active digital enable; pulled high to VIN or MCU GPIO to activate regulator; floating state increases quiescent current.
4 - NC	No Connect	Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction - open acceptable per datasheet.
5 - VOUT	Regulated Output	2.8V regulated output; requires 0.47µF ceramic capacitor to GND within 2mm of pin for loop stability and load transient suppression.

Key Features

Feature	Design Value
Auto Output Discharge	50Ω internal discharge path activates when EN = low - clears VOUT within ~1ms to prevent back-powering or latch-up in multi-rail systems.
Low-Noise Operation	60µV_RMS (10Hz–100kHz) - avoids interference with sensitive analog circuits like ADCs, PLLs, or RF receivers sharing same power domain.
Thermal Shutdown Protection	170°C trip with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking in sealed enclosures.
Current Limit Protection	400mA typical foldback limit - maintains safe junction temperature during short-circuit or heavy transient loads without latch-off.
Wide Input Range	1.7V to 5.5V operation - supports single-cell Li-ion (2.7–4.2V), USB-powered (4.75–5.25V), and legacy 3.3V/5V rails without redesign.

Applications

Mobile Baseband Power

GSM/CDMA Transceiver Bias

Use Scenario: Powering 2.8V I/O interface and memory controller in dual-mode GSM/CDMA smartphones.

IC Role / Device Role / Timing Role: Primary LDO for baseband processor I/O supply, delivering clean, low-noise 2.8V rail independent of noisy PMIC switchers.

Use Value: Enables reliable DDR I/O signaling and flash memory access by suppressing ripple from shared 3.3V buck converter outputs.

Use Scenario: Providing stable 2.8V bias to RF power amplifier driver stages in PDC/GSM handsets.

IC Role / Device Role / Timing Role: Low-PSRR LDO isolating PA bias from digital switching noise, ensuring consistent gain and linearity.

Use Value: Maintains EVM compliance under dynamic transmit conditions by limiting supply-induced distortion below –45dBc.

Digital Camera ISP Core

Portable Audio Codec Supply

Use Scenario: Supplying 2.8V core voltage to image signal processor in compact DSC or action cameras.

IC Role / Device Role / Timing Role: Dedicated LDO for ISP digital core, decoupled from noisy motor drivers and flash LED controllers.

Use Value: Reduces image noise floor by >3dB via 75dB PSRR rejection of 1–10kHz switching artifacts from display backlight ICs.

Use Scenario: Powering stereo audio codec in MP3 players or Bluetooth headsets requiring low-noise analog supply.

IC Role / Device Role / Timing Role: Clean 2.8V analog supply for DAC/ADC reference and bias networks.

Use Value: Achieves THD+N < –95dB by minimizing supply-induced harmonic distortion in audio signal chain.

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, 65dB PSRR @1kHz	Lacks enable control and auto-discharge; suitable only for always-on rails	Select when board-level enable sequencing is unnecessary and lower PSRR is acceptable.
Richtek RT9193-28GB	300mA output, 200mV dropout @150mA, 70dB PSRR @1kHz, EN pin but no auto-discharge	Requires external discharge resistor; slightly higher dropout limits 3.0V input margin	Choose if footprint compatibility with SOT23-5 is critical and discharge path is managed externally.

Compared with XC6206P282MR and RT9193-28GB, PT7M8218B10TAE uniquely combines guaranteed 300mA delivery, 150mV dropout, 75dB PSRR, and integrated auto-discharge - making it optimal for EN-controlled, fast-turnoff portable subsystems where supply rail integrity and sequencing matter.

Availability

PT7M8218B10TAE is available at Aetrix Electronics and suitable for mobile baseband power, GSM/CDMA transceiver bias, and digital camera ISP core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for PT7M8218B10TAE 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 timing, interface, and power management ICs for communications and consumer electronics before its 2016 acquisition.

PT7M8218 belongs to Pericom's precision LDO family targeting battery-powered RF and digital subsystems - engineered for low-noise, high-PSRR operation with minimal external components in space-constrained mobile designs.

FAQ

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

The PT7M8218B10TAE requires VIN ≥ VOUT + VDROPOUT. At 300mA, dropout rises to ~200mV (extrapolated from 150mV @150mA and typical curve data), so minimum VIN is 3.0V. For guaranteed 300mA operation across temperature, 3.1V input is recommended.

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

Yes - the datasheet explicitly states that leaving Pin 4 (NC) open is acceptable. However, tying it to GND improves mechanical robustness during reflow and reduces potential EMI coupling; it draws no current and has no electrical effect on regulation.

Does PT7M8218B10TAE support ceramic capacitors smaller than 0.47µF?

No - the device is characterized and guaranteed stable only with ≥0.47µF X5R/X7R ceramic output capacitors. Using smaller values risks oscillation or degraded transient response, as confirmed by stability testing in the datasheet's application section.

How does the auto-discharge function behave during EN pin assertion?

When EN transitions from high to low, the internal 50Ω discharge path connects VOUT to GND, discharging a 4.7µF load capacitor in ~230µs (τ = R×C = 50Ω × 4.7µF). Discharge begins immediately upon EN deassertion and completes before next power-up sequence, preventing backfeed into upstream supplies.

PT7M8218B10TAE 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):: 1V

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

PT7M8218B10TAE FAQ

1.How can I place an order for PT7M8218B10TAE through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7M8218B10TAE 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 PT7M8218B10TAE reliable?

The price and inventory of PT7M8218B10TAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B10TAE is usually 5 days.

3.What payment methods are accepted for PT7M8218B10TAE?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B10TAE transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for PT7M8218B10TAE?

PT7M8218B10TAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your PT7M8218B10TAE 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 PT7M8218B10TAE?

For technical support, including PT7M8218B10TAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B10TAE requirements.

6.How does Aetrix verify that PT7M8218B10TAE is sourced from the original manufacturer or authorized distributors?

All PT7M8218B10TAE 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 PT7M8218B10TAE meets industry standards.

7.What is the process for return or replacement of PT7M8218B10TAE?

All PT7M8218B10TAE units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B10TAE, 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 PT7M8218B10TAE part is unused and in its original packaging.

Return procedure for PT7M8218B10TAE:

1.Submit a request within 90 days.

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

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