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

Diodes Incorporated PT7M8218B25TAEX

Name: PT7M8218B25TAEX
Brand: Diodes Incorporated
SKU: PT7M8218B25TAEX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: PT7M8218B25TAEX

Manufacturer:: Diodes Incorporated

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

Package:: SC-74A, SOT-753

Datasheet:: PT7M8218B25TAEX.pdf

Description:: IC REG LINEAR 2.5V 300MA SOT23-5

Quantity:: RFQ Add To RFQ list

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Product details

Overview

PT7M8218B25TAEX from Pericom Semiconductor is a 300mA, high-PSRR low-dropout linear regulator with 2.5V fixed output voltage, ±2% initial accuracy, 150mV dropout at 150mA (V_OUT=2.8V), and 75dB PSRR at 1kHz. It operates from 1.7V to 5.5V input, supports 0.47µF ceramic output capacitors, and integrates thermal shutdown, current limiting, and auto output discharge - deployed in mobile phone baseband power rails.

For engineers reviewing the PT7M8218B25TAEX datasheet, PT7M8218B25TAEX pinout, PT7M8218B25TAEX application, or PT7M8218B25TAEX equivalent, key selection criteria include guaranteed 300mA load capability under low-input-voltage conditions, EN-controlled sequencing in battery-powered systems, stability with minimal 0.47µF X5R/X7R output capacitance, and ±100ppm/°C output voltage temperature coefficient across –40°C to +85°C.

Technical Context

The PT7M8218B25TAEX uses a P-channel MOSFET pass element controlled by an internal error amplifier and reference voltage circuit, enabling low dropout and fast transient response. Its integrated phase compensator ensures stability with 0.47µF ceramic capacitors without external compensation components.

EN pin logic is high-active (V_ENH ≥ 1.2V), enabling precise power sequencing; NC pin (Pin 4) is internally unconnected but recommended tied to GND. Thermal shutdown activates at 170°C with 20°C hysteresis, and current limit triggers at 400mA typical under overload.

Key Specifications

Parameter	Value and Actual Design Meaning
Output Voltage	Fixed 2.5V ±2% initial accuracy - ensures stable core voltage for 2.5V I/O domains in portable SoCs.
Max Output Current	300mA guaranteed - sufficient for powering RF transceivers or camera sensor interfaces in compact handhelds.
Dropout Voltage	150mV @ 150mA (V_OUT=2.8V); 180mV @ 150mA (V_OUT≤2.7V) - enables operation down to 2.65V input for 2.5V output in Li-ion single-cell systems.
PSRR	75dB @ 1kHz - suppresses switching noise from DC-DC converters feeding upstream LDO input.
Quiescent Current	36µA typical - minimizes standby power loss in always-on subsystems like real-time clocks or wake-up controllers.
Operating Temp	–40°C to +85°C ambient - qualified for consumer mobile and industrial portable equipment environments.
Output Capacitor	Stable with 0.47µF X5R/X7R ceramic - reduces BOM count and PCB area vs. larger tantalum or electrolytic solutions.

Pinout & Package

PT7M8218B25TAEX is packaged in lead-free, green-compliant SOT23-5L (JEDEC MO-178C/AA), measuring 2.82–3.02mm × 1.50–1.70mm × 1.05–1.25mm, with 0.95mm pitch and gull-wing leads.

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 noise filtering and stability.
2 - GND	Power ground reference	Low-impedance return path for all internal circuits; must be connected directly to system ground plane.
3 - EN	Enable control input	High-active logic (≥1.2V); pulls V_OUT to GND via internal discharge resistor when low.
4 - NC	No-connect terminal	Internally unconnected; recommended tied to GND to minimize EMI pickup, though open is acceptable.
5 - V_OUT	Regulated output	Delivers 2.5V ±2%; requires 0.47µF ceramic capacitor to GND placed adjacent to pin for transient response and stability.

Key Features

Feature	Design Value
Auto output discharge	Internal 50Ω discharge path activates on EN deassertion - prevents floating output during power-down sequencing.
Low-noise regulation	60µV_RMS output noise (10Hz–100kHz) - preserves signal integrity in analog front-ends and ADC reference supplies.
Thermal protection	170°C shutdown with 20°C hysteresis - prevents permanent damage during sustained overload or poor heatsinking.
Load regulation	10mV max deviation from 1–150mA load step - maintains voltage stability across dynamic processor I/O activity.
Line regulation	0.02–0.2%/V over full input range - rejects ripple and sag from upstream switching regulators.

Applications

Mobile Baseband Power

Camera Sensor Core Supply

Use Scenario: Powers baseband processor I/O banks in GSM/CDMA handsets where input derives from shared Li-ion cell or buck converter.

IC Role / Device Role / Timing Role: Primary low-noise post-regulator delivering clean 2.5V to digital interface logic and memory buffers.

Use Value: 75dB PSRR attenuates 1MHz switching noise from upstream DC-DC, preventing bit errors in high-speed data links.

Use Scenario: Supplies image sensor digital core in compact digital still cameras with tight space constraints.

IC Role / Device Role / Timing Role: Fixed-output LDO providing stable 2.5V rail independent of battery voltage decay.

Use Value: 150mV dropout allows >95% battery utilization down to 2.65V input, extending runtime per charge cycle.

Portable Audio Codec Bias

Bluetooth SoC I/O Rail

Use Scenario: Powers analog bias circuitry in portable MP3 player audio codecs requiring ultra-low noise.

IC Role / Device Role / Timing Role: Low-noise voltage source for DAC reference and op-amp bias networks.

Use Value: 60µV_RMS output noise avoids audible hiss in headphone amplifiers and line-out stages.

Use Scenario: Supplies 2.5V I/O domain for Bluetooth 4.x/5.x SoCs in wireless earbuds and wearables.

IC Role / Device Role / Timing Role: Sequenced enable-controlled rail synchronized with host MCU boot sequence.

Use Value: EN pin enables precise power-up timing and auto-discharge prevents latch-up during firmware reset.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
Torex XC6206P252MR	250mA max output, 120mV dropout @ 100mA, no EN pin, 50µA IQ	Lacks enable control and auto-discharge; limited to simpler always-on loads	Select when EN sequencing is unnecessary and 50mA lower current headroom is acceptable.
Richtek RT9193-25GB	300mA output, 200mV dropout @ 150mA, 65dB PSRR @ 1kHz, 45µA IQ	Lower PSRR and higher dropout reduce noise rejection and battery efficiency in low-VIN cases	Prefer when cost sensitivity outweighs PSRR and dropout performance requirements.

Compared with XC6206P252MR and RT9193-25GB, PT7M8218B25TAEX delivers superior PSRR (75dB vs ≤65dB), tighter output accuracy (±2% vs ±3%), and integrated EN-controlled discharge - critical for sequenced power architectures in modern portable devices.

Availability

PT7M8218B25TAEX is available at Aetrix Electronics and suitable for mobile phones, digital cameras, and Bluetooth audio devices requiring stable component supply, consistent parametric performance, and RoHS-compliant packaging.

Supply support for PT7M8218B25TAEX 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 2017 acquisition.

The PT7M8218 belongs to Pericom's precision LDO family targeting battery-powered portable systems, emphasizing low quiescent current, small footprint, and robust transient response for space-constrained designs.

FAQ

What is the minimum input voltage required to maintain 2.5V output at 300mA?

The PT7M8218B25TAEX requires VIN ≥ V_OUT + V_DROP. With 180mV max dropout at 300mA (per datasheet load curve extrapolation), minimum VIN is 2.68V. At 150mA, dropout is 150mV, so 2.65V suffices. Input below 2.65V causes output collapse.

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

Yes - Pin 4 is internally unconnected and may be left floating per datasheet guidance. However, tying it to GND is recommended to reduce susceptibility to EMI coupling and improve layout robustness in noisy RF environments.

Does PT7M8218B25TAEX require an input capacitor?

Yes - a 0.47µF X5R/X7R ceramic capacitor is required between VIN and GND, placed as close as possible to Pins 1 and 2. This stabilizes the input rail, filters high-frequency noise, and prevents oscillation during load transients.

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

When EN is pulled low, the internal 50Ω discharge path connects V_OUT to GND, discharging the output capacitor within ~1ms (for 0.47µF). This prevents residual voltage from interfering with downstream logic states or causing back-powering during system reset sequences.

PT7M8218B25TAEX 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):: 2.5V

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

PT7M8218B25TAEX FAQ

1.How can I place an order for PT7M8218B25TAEX through Aetrix?

Please submit a Request for Quotation (RFQ) for PT7M8218B25TAEX 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 PT7M8218B25TAEX reliable?

The price and inventory of PT7M8218B25TAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B25TAEX is usually 5 days.

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Once your PT7M8218B25TAEX 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 PT7M8218B25TAEX?

For technical support, including PT7M8218B25TAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B25TAEX requirements.

6.How does Aetrix verify that PT7M8218B25TAEX is sourced from the original manufacturer or authorized distributors?

All PT7M8218B25TAEX 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 PT7M8218B25TAEX meets industry standards.

7.What is the process for return or replacement of PT7M8218B25TAEX?

All PT7M8218B25TAEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B25TAEX, 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 PT7M8218B25TAEX part is unused and in its original packaging.

Return procedure for PT7M8218B25TAEX:

1.Submit a request within 90 days.

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

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