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Diodes Incorporated PT7M8218B33TAE
- Part No.:
- PT7M8218B33TAE
- Manufacturer:
- Diodes Incorporated
- Package:
- SC-74A, SOT-753
- Datasheet:
-
PT7M8218B33TAE.pdf
- Description:
- IC REG LINEAR 3.3V 300MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,602
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Product details
Overview
PT7M8218B33TAE from Pericom Semiconductor is a 3.3V, 300mA low-dropout linear regulator with 150mV dropout at 150mA, ±2% initial output accuracy, 75dB PSRR at 1kHz, and 36µA quiescent current. 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-designed for power rail stabilization in portable RF front-ends.
For engineers reviewing the PT7M8218B33TAE datasheet, PT7M8218B33TAE pinout, PT7M8218B33TAE application, or PT7M8218B33TAE equivalent, key selection criteria include guaranteed 300mA load capability under low VIN–VOUT headroom, high PSRR for noise-sensitive analog/RF stages, EN-controlled sequencing in multi-rail systems, and SC70-5L/SOT23-5L footprint compatibility for space-constrained mobile designs.
Technical Context
The PT7M8218B33TAE uses a P-channel MOSFET pass element enabling low dropout and stable operation with 0.47µF X5R/X7R ceramic capacitors. Its internal phase compensator eliminates need for external compensation components while maintaining stability across –40°C to +85°C ambient range.
EN pin logic is high-active (VENH ≥1.2V), enabling precise power sequencing; the NC pin (Pin 4) must be tied to GND or left floating per design flexibility. Output discharge resistance is 50Ω when disabled, ensuring rapid VOUT decay during shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±2% initial accuracy - ensures reliable logic-level compliance for 3.3V I/O domains without post-regulation trimming. |
| Max Output Current | 300mA guaranteed - supports moderate-power RF ICs, baseband processors, and sensor interfaces without thermal derating at TA ≤85°C. |
| Dropout Voltage | 150mV @ 150mA - enables operation down to VIN = 3.45V, critical for Li-ion battery discharge profiles (3.4–4.2V). |
| PSRR | 75dB @ 1kHz - suppresses switching noise from adjacent DC/DC converters feeding mixed-signal subsystems. |
| Quiescent Current | 36µA typical - minimizes standby power loss in always-on circuits like real-time clocks or wake-up receivers. |
| Operating Temp | –40°C to +85°C - qualified for consumer handheld and industrial edge node environments without derating. |
| Capacitor Support | Stable with 0.47µF ceramic (X5R/X7R) - reduces BOM count and PCB area vs. larger tantalum or electrolytic solutions. |
Pinout & Package
PT7M8218B33TAE is packaged in SOT23-5L (JEDEC MO-178C/AA) and SC70-5L (JEDEC MO-203B/AA) - both 5-pin surface-mount packages with identical pinout mapping and thermal performance optimized for compact portable layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply rail | Accepts 1.7–5.5V; requires local 0.47µF ceramic bypass to GND to suppress high-frequency noise and ensure transient stability. |
| 2 - GND | Power ground reference | Low-impedance return path for VIN, VOUT, and EN; must be connected directly to system ground plane with minimal trace length. |
| 3 - EN | Enable control input | High-active logic (≥1.2V); drives internal P-MOSFET gate; <100nA leakage allows direct MCU GPIO connection without pull-up. |
| 4 - NC | No-connect terminal | Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction, though floating is acceptable. |
| 5 - VOUT | Regulated output | Delivers 3.3V ±2%; requires 0.47µF ceramic capacitor to GND within 2mm of pin for optimal PSRR and load transient response. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Output Discharge | 50Ω internal discharge path activates on EN low - clears VOUT within 100µs, preventing back-powering of upstream circuitry during hot-swap or sleep transitions. |
| Thermal Shutdown | 170°C trip with 20°C hysteresis - protects against sustained overload or poor heatsinking in sealed enclosures without latch-up. |
| Low-ESR Ceramic Stability | Validated with 0.47µF X5R/X7R - eliminates need for series resistance or large bulk capacitance, reducing cost and board area by >40% vs. legacy LDOs. |
| High Accuracy Trim | Factory-trimmed to ±2% over temperature - avoids external feedback resistors and calibration firmware, simplifying design for Class 2 consumer certification. |
| Ultra-Low IQ | 36µA typical supply current - extends battery life in devices requiring >100-hour standby (e.g., Bluetooth LE sensors, remote controls). |
Applications
| Cellular RF Front-End | Digital Still Camera Sensor Power |
|---|---|
Use Scenario: Powering GSM/CDMA PA bias rails and LNA supply in dual-band handsets where battery voltage drops below 3.6V during transmit bursts. IC Role / Device Role / Timing Role: Primary 3.3V LDO delivering clean, low-noise bias to RF power amplifiers and low-noise amplifiers. Use Value: 75dB PSRR rejects switching noise from PMIC buck converters, preventing AM-to-PM distortion and maintaining ACLR spec. | Use Scenario: Supplying image sensor analog core and ADC reference in compact DSC modules with tight thermal constraints. IC Role / Device Role / Timing Role: Low-noise, low-dropout regulator for precision analog signal chain powering. Use Value: ±2% output accuracy and <60µVrms noise ensure consistent ADC full-scale and SNR >72dB across operating temperature. |
| Portable Media Player Audio Codec | Industrial Handheld Terminal Baseband |
Use Scenario: Providing regulated 3.3V to stereo audio DAC/ADC and headphone amplifier in MP3 players with Li-Po batteries. IC Role / Device Role / Timing Role: Low-quiescent-current LDO supporting always-on audio playback and standby modes. Use Value: 36µA IQ extends 200mAh battery runtime to >15 hours continuous playback; 150mV dropout maintains regulation until battery reaches 3.45V. | Use Scenario: Powering ARM9-based baseband processor and RS-485 transceiver in ruggedized warehouse scanners operating at –20°C to +70°C. IC Role / Device Role / Timing Role: Industrial-grade LDO with extended temperature qualification and robust protection features. Use Value: Thermal shutdown and current limit prevent field failures due to connector shorting or cold-temperature startup surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P332MR | 300mA, 3.3V, 150mV dropout, but only 65dB PSRR @1kHz and no EN pin. | Lacks enable control and lower PSRR limits use in RF-coupled systems. | Select when EN functionality and >70dB PSRR are not required; lower cost alternative for non-RF digital rails. |
| Richtek RT9193-33GB | 300mA, 3.3V, 200mV dropout, 70dB PSRR @1kHz, EN pin, but 60µA IQ. | Higher dropout and IQ reduce battery efficiency in deep-discharge or ultra-low-power modes. | Prefer when wider input range (2.0–6.0V) is needed, but verify thermal margin at 300mA in SOT23-5L. |
Compared with XC6206P332MR and RT9193-33GB, PT7M8218B33TAE uniquely delivers 75dB PSRR with EN control and 36µA IQ in the same SOT23-5L footprint-making it optimal for RF-sensitive, battery-constrained portable designs requiring precise sequencing and noise immunity.
Availability
PT7M8218B33TAE is available at Aetrix Electronics and suitable for cellular RF front-ends, digital camera sensor power, portable media player audio codecs, and industrial handheld terminal baseband systems requiring stable component supply and long-lifecycle support.
Supply support for PT7M8218B33TAE 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, computing, and consumer electronics before acquisition in 2016.
The PT7M8218 belongs to Pericom's precision LDO family engineered for noise-sensitive portable applications-emphasizing low PSRR, ultra-low IQ, and small-footprint packaging to meet shrinking form factor and battery-life demands.
FAQ
What is the minimum input voltage required for stable 3.3V output at 300mA?
The PT7M8218B33TAE requires VIN ≥ 3.45V to maintain 3.3V output at 300mA, based on its 150mV dropout specification at 150mA and confirmed 180mV max dropout at 300mA per datasheet Section 2. This ensures regulation across full Li-ion battery discharge (3.4–4.2V) without brownout.
Can the NC pin (Pin 4) be left unconnected in production PCB layout?
Yes, Pin 4 is internally unconnected and may be left floating per datasheet guidance; however, tying it to GND improves mechanical anchoring and reduces potential EMI coupling in high-density layouts-no electrical penalty exists for either choice.
Does PT7M8218B33TAE require an external resistor divider to set output voltage?
No-the output voltage is factory-trimmed to 3.3V and fixed; no external feedback network is needed. The device is a single-output, non-adjustable LDO, eliminating resistor tolerance errors and layout complexity associated with adjustable regulators.
How does the auto output discharge function behave during EN deactivation?
When EN is pulled low, an internal 50Ω switch connects VOUT to GND, discharging a 0.47µF output capacitor from 3.3V to <100mV in under 100µs-preventing back-powering of upstream circuitry and enabling safe hot-swap or fast wake/sleep transitions in portable systems.
PT7M8218B33TAE 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):
- 3.3V
- 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
PT7M8218B33TAE FAQ
1.How can I place an order for PT7M8218B33TAE through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M8218B33TAE 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 PT7M8218B33TAE reliable?
The price and inventory of PT7M8218B33TAE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B33TAE is usually 5 days.
3.What payment methods are accepted for PT7M8218B33TAE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B33TAE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M8218B33TAE?
PT7M8218B33TAE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M8218B33TAE 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 PT7M8218B33TAE?
For technical support, including PT7M8218B33TAE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B33TAE requirements.
6.How does Aetrix verify that PT7M8218B33TAE is sourced from the original manufacturer or authorized distributors?
All PT7M8218B33TAE 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 PT7M8218B33TAE meets industry standards.
7.What is the process for return or replacement of PT7M8218B33TAE?
All PT7M8218B33TAE units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B33TAE, 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 PT7M8218B33TAE part is unused and in its original packaging.
Return procedure for PT7M8218B33TAE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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