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Diodes Incorporated PT7M8218B20TAE
- Part No.:
- PT7M8218B20TAE
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PT7M8218B20TAE.pdf
- Description:
- IC REG LINEAR 2V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,804
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Product details
Overview
PT7M8218B20TAE 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 baseband circuits in portable wireless devices.
For engineers reviewing the PT7M8218B20TAE datasheet, PT7M8218B20TAE pinout, PT7M8218B20TAE application, or PT7M8218B20TAE equivalent, key selection criteria include guaranteed 300mA load capability, auto output discharge, thermal shutdown at 170°C, and compatibility with 0.47µF ceramic capacitors in space-constrained SC70-5L/SOT23-5L footprints.
Technical Context
The PT7M8218B20TAE integrates a P-channel MOSFET pass element, internal reference voltage source, error amplifier with phase compensation, and ON/OFF control circuitry. Its architecture enables stable regulation with low-ESR ceramic capacitors and supports fast EN-controlled turn-on/turn-off transitions (20µs typical).
It features dual protection mechanisms: current limit (400mA typ) and thermal shutdown (170°C with 20°C hysteresis), plus EN pin logic-level compatibility (VENH ≥1.2V, VENL ≤0.3V) and ultra-low standby current (0.05–1µA). Output voltage accuracy is maintained across –40°C to +85°C ambient range with ±100ppm/°C temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% at 30mA; factory-trimmed for precision without external resistors. |
| Max Output Current | 300mA guaranteed - sufficient to power baseband processors or RF transceivers in mobile handsets. |
| Dropout Voltage | 150mV @ 150mA (VOUT=2.8V) - enables operation down to VIN = 2.95V, extending battery runtime. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from PMICs or DC-DC converters feeding adjacent analog blocks. |
| Quiescent Current | 36µA typ - minimizes no-load power loss in always-on subsystems like real-time clocks or sensors. |
| Operating Temp | –40°C to +85°C - qualified for consumer and industrial portable equipment environments. |
| Capacitor Support | Stable with 0.47µF X5R/X7R ceramic output capacitor - eliminates need for bulky tantalum or electrolytic types. |
Pinout & Package
PT7M8218B20TAE is available in two lead-free, RoHS-compliant packages: SOT23-5L (3.02 × 1.70 mm) and SC70-5L (2.20 × 1.35 mm). Both share identical pin assignment and thermal performance characteristics per JEDEC standards MO-178C/AA and MO-203B/AA.
| 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 transient response. |
| 2 - GND | Power ground reference | Low-impedance return path for regulator core and output current; must be routed with minimal trace inductance. |
| 3 - EN | Enable control input | High-active logic interface (1.2–5.5V); drives regulator into 0.05µA standby when pulled low. |
| 4 - NC | No-connect terminal | Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction. |
| 5 - VOUT | Regulated output | Delivers 2.8V ±2% to load; requires 0.47µF ceramic capacitor to GND for loop stability and noise filtering. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Output Discharge | Internal 50Ω discharge path activates on EN deactivation - prevents floating voltage during power sequencing. |
| High PSRR (75dB @ 1kHz) | Rejects ripple from noisy switchers or shared power rails - critical for clean supply to RF front-ends. |
| Low Dropout (150mV @ 150mA) | Enables efficient operation near battery end-of-discharge (e.g., Li-ion at 3.0V), preserving system uptime. |
| Thermal Shutdown w/ Hysteresis | Shuts down at 170°C and re-enables only after cooling by ≥20°C - prevents thermal cycling damage under overload. |
| ±2% Initial Accuracy | Meets tight voltage tolerance requirements of modern SoCs and memory interfaces without calibration. |
Applications
| Mobile Baseband Power | GSM/CDMA RF Supply |
|---|---|
|
Use Scenario: Powering baseband processor I/O and core domains in dual-mode GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary LDO delivering clean, regulated 2.8V to processor subsystems requiring low noise and fast load transient response. Use Value: Maintains 2.8V ±2% under 150mA dynamic loads while rejecting coupling from adjacent DC-DC converters. |
Use Scenario: Supplying voltage-controlled oscillators (VCOs) and low-noise amplifiers (LNAs) in cellular RF transceivers. IC Role / Device Role / Timing Role: Low-noise, high-PSRR bias rail isolating sensitive RF circuitry from digital supply noise. Use Value: 75dB PSRR at 1kHz ensures <100µVrms output noise, preventing phase noise degradation in transmit paths. |
| Digital Camera Sensor Bias | Portable Media Player Core Logic |
|
Use Scenario: Providing stable bias to CMOS image sensor analog front-end (AFE) and ADC reference in DSCs. IC Role / Device Role / Timing Role: Precision LDO generating 2.8V reference for sensor pixel readout and analog signal chain. Use Value: ±2% initial accuracy and ±100ppm/°C drift ensure consistent exposure calibration across operating temperature range. |
Use Scenario: Powering NAND flash controller and audio codec in MP3 players with single-cell Li-ion battery. IC Role / Device Role / Timing Role: Efficient, compact LDO supporting 300mA peak loads during file decode and playback bursts. Use Value: 150mV dropout extends usable battery life by enabling operation down to 2.95V input before brownout. |
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, 65dB PSRR @ 1kHz, no EN pin | Lacks enable control and auto-discharge; lower PSRR limits use in RF-critical designs | Select when EN functionality and >70dB PSRR are not required; lower cost for basic logic rail use |
| Richtek RT9193-28GB | 300mA output, 200mV dropout @ 150mA, 70dB PSRR @ 1kHz, 50µA IQ | Slightly higher dropout and lower PSRR; same SOT23-5L footprint but different pinout (EN on Pin 2) | Choose if board layout allows pinout adaptation and 5dB PSRR margin is acceptable for non-RF loads |
Compared with XC6206P282MR and RT9193-28GB, PT7M8218B20TAE provides superior PSRR and integrated EN-controlled discharge-critical for RF and power-sequenced systems-while maintaining identical SOT23-5L package compatibility and 300mA capability.
Availability
PT7M8218B20TAE is available at Aetrix Electronics and suitable for mobile handset power management, portable media player subsystems, digital camera sensor biasing, and RF transceiver supply applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PT7M8218B20TAE 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 precision LDO family designed specifically for battery-powered portable devices demanding low quiescent current, high PSRR, and small-footprint packaging in SC70/SOT23 formats.
FAQ
What is the minimum input voltage required for stable 2.8V output at 300mA?
The PT7M8218B20TAE requires VIN ≥ VOUT + VDROPOUT. At 300mA, the dropout is not directly specified, but maximum dropout is 180mV for VOUT ≤2.7V and 150mV for VOUT ≥2.8V at 150mA. Extrapolating conservatively, VIN ≥ 3.0V is recommended for full 300mA delivery at 2.8V output with margin.
Can the NC pin (Pin 4) be left floating in PCB layout?
Yes - the NC pin is internally unconnected and may be left floating per datasheet guidance. However, tying it to GND is preferred for mechanical reinforcement, improved thermal conduction, and reduced EMI susceptibility in high-density layouts.
Does PT7M8218B20TAE require an input capacitor?
Yes - a 0.47µF X5R/X7R ceramic capacitor is required between VIN and GND, placed as close as possible to the IC. This stabilizes the input rail, reduces high-frequency noise, and prevents instability due to PCB trace inductance during load transients.
How does the auto output discharge function behave during EN deactivation?
When EN is pulled low, the internal 50Ω discharge path between VOUT and GND activates, discharging the output capacitor within tens of microseconds. This prevents residual voltage from interfering with power sequencing or causing latch-up in downstream logic during system reset or sleep transitions.
PT7M8218B20TAE 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):
- 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
PT7M8218B20TAE FAQ
1.How can I place an order for PT7M8218B20TAE through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M8218B20TAE 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 PT7M8218B20TAE reliable?
The price and inventory of PT7M8218B20TAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B20TAE is usually 5 days.
3.What payment methods are accepted for PT7M8218B20TAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B20TAE transactions.
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4.How is shipping managed for PT7M8218B20TAE?
PT7M8218B20TAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M8218B20TAE 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 PT7M8218B20TAE?
For technical support, including PT7M8218B20TAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B20TAE requirements.
6.How does Aetrix verify that PT7M8218B20TAE is sourced from the original manufacturer or authorized distributors?
All PT7M8218B20TAE 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 PT7M8218B20TAE meets industry standards.
7.What is the process for return or replacement of PT7M8218B20TAE?
All PT7M8218B20TAE units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B20TAE, 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 PT7M8218B20TAE part is unused and in its original packaging.
Return procedure for PT7M8218B20TAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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