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Diodes Incorporated PT7M8218B30TAEX
- Part No.:
- PT7M8218B30TAEX
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PT7M8218B30TAEX.pdf
- Description:
- IC REG LINEAR 3V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,156
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Product details
Overview
PT7M8218B30TAEX from Pericom Semiconductor is a 300mA, high-PSRR low-dropout regulator with 2.85V fixed output, ±2% initial accuracy, 150mV dropout at 150mA, and stable operation with 0.47µF ceramic capacitors. It delivers precision voltage regulation for portable RF and digital subsystems requiring low noise and high ripple rejection.
For engineers reviewing the PT7M8218B30TAEX datasheet, PT7M8218B30TAEX pinout, PT7M8218B30TAEX application, or PT7M8218B30TAEX equivalent, key selection criteria include guaranteed 300mA output current, 75dB PSRR at 1kHz, 36µA quiescent current, thermal shutdown at 170°C, and EN-controlled on/off sequencing in SC70-5L/SOT23-5L packages.
Technical Context
The PT7M8218B30TAEX integrates a P-channel MOSFET pass element, internal reference, error amplifier with phase compensation, and protection circuitry including current limit (400mA typical) and thermal shutdown (170°C with 20°C hysteresis). Its architecture enables stability with ultra-low-ESR 0.47µF X5R/X7R ceramic capacitors on both input and output.
EN pin logic is high-active (VENH ≥1.2V), enabling precise power sequencing; auto output discharge (50Ω typical) ensures rapid VOUT decay during disable. The device operates across –40°C to +85°C ambient and maintains ±100ppm/°C output voltage drift over temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.85V fixed, ±2% initial accuracy - ensures tight supply tolerance for core logic and RF bias rails |
| Max Output Current | 300mA - supports moderate-power baseband processors and audio codecs without external boost |
| Dropout Voltage | 150mV @ 150mA - enables operation down to VIN = 3.0V while maintaining regulated 2.85V output |
| PSRR | 75dB @ 1kHz - suppresses switching noise from PMIC or DC-DC converters feeding adjacent circuits |
| Quiescent Current | 36µA - minimizes battery drain in always-on standby modes of portable devices |
| 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 bulky tantalum or aluminum electrolytics |
Pinout & Package
PT7M8218B30TAEX is packaged in lead-free, green-compliant SOT23-5L (JEDEC MO-178C/AA) with 0.95mm pitch and SC70-5L (JEDEC MO-203B/AA) with 0.65mm pitch. Both packages feature identical pinout and thermal performance up to 400mW (SOT23) / 300mW (SC70).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input Supply | Accepts 1.7V–5.5V; requires local 0.47µF ceramic bypass to GND for stability and transient response |
| 2 - GND | Ground Reference | Primary return path for regulator current and error amplifier; must be low-impedance connection |
| 3 - EN | Enable Control | High-active logic input (1.2V min high, 0.3V max low); controls ON/OFF state and activates auto-discharge |
| 4 - NC | No Connect | Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction |
| 5 - VOUT | Regulated Output | Delivers 2.85V ±2%; requires 0.47µF ceramic capacitor to GND for loop stability and load transient suppression |
Key Features
| Feature | Design Value |
|---|---|
| Low Dropout Architecture | P-channel MOSFET pass device enables 150mV dropout at full 150mA load - extends battery runtime in single-cell Li-ion systems |
| Auto Output Discharge | 50Ω internal discharge path activated when EN = low - prevents floating outputs and ensures clean power-down sequencing |
| High PSRR Performance | 75dB @ 1kHz, maintained across 10Hz–100kHz range - critical for powering RF front-ends and ADC reference supplies |
| Thermal & Current Protection | 170°C thermal shutdown with 20°C hysteresis and 400mA current limit - protects against sustained overload and PCB hotspots |
| Ultra-Low Quiescent Current | 36µA typical supply current - reduces no-load power loss by >50% versus legacy LDOs in always-on sensor nodes |
Applications
| Mobile Baseband Power | GSM/CDMA RF Bias |
|---|---|
Use Scenario: Powering baseband processor I/O and memory interface rails in dual-mode GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary 2.85V LDO supplying core logic voltage with fast load transient response and low noise. Use Value: 75dB PSRR rejects coupled noise from high-frequency PA switching, preventing bit errors in digital baseband processing. | Use Scenario: Providing clean bias voltage to power amplifier driver stages in cellular front-end modules. IC Role / Device Role / Timing Role: Low-noise, high-PSRR LDO delivering stable 2.85V to RF transistor bias networks. Use Value: 60µVrms output noise and 150mV dropout enable efficient PA operation near battery minimum voltage (3.0V). |
| Digital Camera Sensor Core | Portable Audio Codec Supply |
Use Scenario: Regulating power for CMOS image sensor analog core and PLL clock generation circuitry. IC Role / Device Role / Timing Role: Precision 2.85V supply with ±2% accuracy and <100ppm/°C drift for sensor bias stability. Use Value: ±2% initial accuracy and ±100ppm/°C tempco ensure consistent analog gain and color fidelity across –40°C to +85°C. | Use Scenario: Supplying headphone amplifier and DAC reference voltage in MP3 players and Bluetooth earbuds. IC Role / Device Role / Timing Role: Low-quiescent-current LDO providing quiet 2.85V rail decoupled from noisy system DC-DC sources. Use Value: 36µA IQ and 0.47µF ceramic compatibility reduce PCB area and extend playback time by >12% vs. 100µA alternatives. |
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, 65dB PSRR @ 1kHz, no EN pin | Lacks enable control and auto-discharge; limited to simpler always-on loads | Select when board space is constrained and sequencing is handled externally |
| Richtek RT9193-28GB | 300mA output, 250mV dropout @ 150mA, 70dB PSRR @ 1kHz, 50µA IQ | Higher dropout and quiescent current; no auto-discharge function | Prefer when cost sensitivity outweighs PSRR and discharge requirements |
Compared with XC6206P282MR and RT9193-28GB, PT7M8218B30TAEX provides superior PSRR (75dB), lower dropout (150mV), integrated EN control with auto-discharge, and tighter output accuracy (±2%), making it optimal for noise-sensitive RF and portable multimedia applications.
Availability
PT7M8218B30TAEX is available at Aetrix Electronics and suitable for mobile baseband power, GSM/CDMA RF bias, and portable audio codec supply requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PT7M8218B30TAEX 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.
The PT7M8218 belongs to Pericom's high-PSRR, low-IQ LDO family designed specifically for battery-powered portable devices demanding ultra-low noise, fast transient response, and minimal footprint in SC70/SOT23 packages.
FAQ
What is the minimum input voltage required to maintain regulation at 2.85V output?
The PT7M8218B30TAEX requires VIN ≥ 3.0V to sustain 2.85V output at 150mA load, based on its 150mV dropout specification. At lighter loads (e.g., 30mA), regulation holds down to VIN = 2.88V. Input below 1.7V is prohibited per absolute maximum ratings.
Can the NC pin (Pin 4) be left floating in layout?
Yes, Pin 4 is internally unconnected and may be left floating per datasheet guidance. However, tying it to GND is recommended to improve mechanical reliability, reduce parasitic antenna effects, and minimize EMI coupling in high-density RF layouts.
Does PT7M8218B30TAEX require an input capacitor?
Yes - a 0.47µF X5R/X7R ceramic capacitor must be placed between VIN and GND, located as close as possible to Pins 1 and 2. This stabilizes the input supply, suppresses high-frequency noise, and prevents oscillation under dynamic load conditions.
How does the auto output discharge function operate during shutdown?
When EN is pulled low, an internal 50Ω switch connects VOUT to GND, discharging the output capacitor within tens of microseconds. This prevents residual voltage from interfering with downstream logic states or causing latch-up in powered-down sections of the system.
PT7M8218B30TAEX 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):
- 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:
- SOT-23-5
PT7M8218B30TAEX FAQ
1.How can I place an order for PT7M8218B30TAEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M8218B30TAEX 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 PT7M8218B30TAEX reliable?
The price and inventory of PT7M8218B30TAEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B30TAEX is usually 5 days.
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Once your PT7M8218B30TAEX 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 PT7M8218B30TAEX?
For technical support, including PT7M8218B30TAEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B30TAEX requirements.
6.How does Aetrix verify that PT7M8218B30TAEX is sourced from the original manufacturer or authorized distributors?
All PT7M8218B30TAEX 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 PT7M8218B30TAEX meets industry standards.
7.What is the process for return or replacement of PT7M8218B30TAEX?
All PT7M8218B30TAEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B30TAEX, 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 PT7M8218B30TAEX part is unused and in its original packaging.
Return procedure for PT7M8218B30TAEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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