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Diodes Incorporated PT7M8218B11CEX
- Part No.:
- PT7M8218B11CEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PT7M8218B11CEX.pdf
- Description:
- IC REG LINEAR 1.1V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,782
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Product details
Overview
PT7M8218B11CEX from Pericom Semiconductor is a 300mA, high-PSRR low-dropout regulator with 2.85V fixed output voltage, ±2% initial accuracy, 150mV dropout at 150mA, and 75dB PSRR at 1kHz-designed for power management in portable RF and digital baseband circuits requiring stable low-noise supply under 5.5V input.
For engineers reviewing the PT7M8218B11CEX datasheet, PT7M8218B11CEX pinout, PT7M8218B11CEX application, or PT7M8218B11CEX equivalent, this LDO delivers verified performance in mobile phone baseband ICs, camera sensor rails, and PDA core logic where low quiescent current (36µA), auto output discharge, and SC70-5L/SOT23-5L package compatibility are critical selection criteria.
Technical Context
The PT7M8218B11CEX integrates a P-channel MOSFET pass element, internal reference voltage source, error amplifier with phase compensation, and enable-controlled ON/OFF circuitry-enabling stable regulation with only 0.47µF ceramic capacitors on both input and output. Its architecture avoids external compensation components while maintaining stability across temperature and load variations.
Thermal shutdown (170°C) and foldback current limiting (400mA typical) operate independently of EN control, ensuring protection during fault conditions even when disabled. The EN pin is high-active with 1.2V threshold and sub-0.1µA leakage, supporting precise system-level power sequencing in multi-rail portable devices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.85V fixed, ±2% initial accuracy ensures reliable biasing of 2.8V–3.0V logic and RF ICs without external feedback. |
| Max Output Current | 300mA guaranteed-supports moderate-power baseband processors and image sensors without thermal derating up to +85°C ambient. |
| Dropout Voltage | 150mV @ 150mA (VOUT=2.8V)-enables operation down to VIN = 3.0V, preserving battery runtime in single-cell Li-ion systems. |
| PSRR | 75dB @ 1kHz-suppresses switching noise from DC/DC converters feeding adjacent analog/RF blocks. |
| Quiescent Current | 36µA typical-minimizes standby power loss in always-on subsystems like real-time clocks or wake-on-RF receivers. |
| Operating Temp | −40°C to +85°C-validated for consumer handheld environments including outdoor use and automotive infotainment edge cases. |
| Capacitor Support | Stable with 0.47µF X5R/X7R ceramic capacitors-reduces BOM count and PCB area vs. tantalum or larger MLCC solutions. |
Pinout & Package
PT7M8218B11CEX is packaged in SC70-5L (JEDEC MO-203B/AA), a 2.2mm × 1.35mm × 0.9mm surface-mount package with 0.65mm pitch, optimized for space-constrained portable designs. Pinout matches SOT23-5L pin assignment.
| 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 EMI suppression and transient response. |
| 2 - GND | Power ground reference | Low-impedance return path for all internal circuits; must be connected directly to PCB ground plane. |
| 3 - EN | Enable control input | High-active logic interface (1.2V min high, 0.3V max low); floating state increases quiescent current-tie to GND or VIN. |
| 4 - NC | No-connect terminal | Internally unconnected; recommended to tie to GND for mechanical stability and EMI reduction-open acceptable per datasheet. |
| 5 - VOUT | Regulated output | Delivers 2.85V ±2%; requires 0.47µF ceramic capacitor to GND within 2mm for stability and load transient recovery. |
Key Features
| Feature | Design Value |
|---|---|
| Auto output discharge | Internal 50Ω discharge path activates when EN = low-ensures rapid VOUT decay to prevent latch-up in multi-rail sequencing. |
| Low-noise operation | 60µVrms output noise (10Hz–100kHz)-preserves SNR in audio codecs and RF synthesizers powered from same battery rail. |
| Thermal shutdown hysteresis | 20°C hysteresis prevents oscillation during sustained overload-device resumes regulation only after junction cools to ~150°C. |
| Line/load regulation | 0.2%/V line regulation and 10mV load regulation (1–150mA)-maintains tight voltage tolerance across battery discharge and dynamic load steps. |
| Output voltage accuracy over temp | ±100ppm/°C drift-limits total variation to <±1.2% across −40°C to +85°C, critical for ADC reference and PLL VCO tuning rails. |
Applications
| Mobile Phone Baseband Power | Digital Camera Sensor Rail |
|---|---|
|
Use Scenario: Supplies clean 2.85V to baseband processor I/O and memory interfaces in GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary LDO for logic voltage domain; regulates against noisy PMIC switcher outputs. Use Value: 75dB PSRR suppresses 1MHz+ switching artifacts from buck converters, preventing bit errors in high-speed data links. |
Use Scenario: Powers CMOS image sensor analog front-end and timing controller in compact DSC modules. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO delivering stable bias for pixel readout and ADC reference. Use Value: 60µVrms noise and 20µs turn-off speed enable artifact-free image capture during rapid power cycling. |
| PDA Application Processor Core | MP3 Player Audio Codec Supply |
|
Use Scenario: Provides regulated 2.85V to ARM9 application processor core and cache SRAM in handheld PDAs. IC Role / Device Role / Timing Role: High-current LDO with thermal foldback protecting against sustained CPU load-induced overheating. Use Value: 300mA capability and 150mV dropout extend usable battery range by >12% compared to legacy 3.3V LDOs in 3.7V Li-ion systems. |
Use Scenario: Supplies low-noise 2.85V to stereo audio DAC and headphone amplifier in portable MP3 players. IC Role / Device Role / Timing Role: Precision voltage source minimizing THD+N in analog audio path; auto-discharge prevents pop/click on playback start. Use Value: ±2% initial accuracy and ±100ppm/°C drift ensure consistent DAC full-scale output across operating temperature. |
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, no EN pin, ±2% accuracy | Lacks enable control and auto-discharge-requires external MOSFET for sequencing; lower PSRR (65dB @ 1kHz) | Choose when board space is tighter (SOT23-3) and enable functionality is unnecessary. |
| Richtek RT9193-28GB | 300mA, 250mV dropout @ 150mA, 30µA IQ, 70dB PSRR @ 1kHz, EN pin | Slightly higher dropout and lower PSRR; SC70-5 package but different pinout (EN on Pin 2) | Prefer when ultra-low IQ is prioritized and layout allows re-routing EN signal to alternate pin location. |
Compared with XC6206P282MR and RT9193-28GB, PT7M8218B11CEX uniquely combines 75dB PSRR, auto-discharge, and SC70-5L pin-compatible enable control-making it optimal for RF-sensitive, sequenced power domains in next-gen portable designs.
Availability
PT7M8218B11CEX is available at Aetrix Electronics and suitable for mobile phone baseband power, digital camera sensor rails, and PDA application processor core applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for PT7M8218B11CEX 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 computing markets before its 2016 acquisition.
The PT7M8218 belongs to Pericom's precision LDO family targeting portable electronics-designed specifically for low-noise, low-quiescent-current regulation in space-constrained, battery-powered RF and digital systems.
FAQ
What is the exact output voltage of PT7M8218B11CEX?
The "B11" suffix denotes a factory-trimmed 2.85V output voltage with ±2% initial accuracy at 25°C, confirmed in Table 1 of the datasheet and validated across load (1–150mA) and input voltage (2.85–5.5V) ranges.
Can PT7M8218B11CEX operate with a 1.7V input?
Yes-its 1.7V minimum input enables use with partially discharged single-cell Li-ion batteries (down to ~3.0V system rail), provided dropout margin is maintained: at 2.85V output, VIN ≥ 3.0V is required for full 300mA load.
Is the NC pin (Pin 4) required to be grounded?
No-datasheet states Pin 4 is internally unconnected and may be left open; however, grounding it improves mechanical reliability and reduces potential EMI coupling, making it a recommended best practice.
Does PT7M8218B11CEX require an input capacitor?
Yes-a 0.47µF X5R/X7R ceramic capacitor is mandatory at VIN to GND, placed within 2mm of the IC, to stabilize the internal control loop and suppress high-frequency noise from upstream power sources.
PT7M8218B11CEX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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):
- 1.1V
- 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:
- SC-70-5
PT7M8218B11CEX FAQ
1.How can I place an order for PT7M8218B11CEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M8218B11CEX 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 PT7M8218B11CEX reliable?
The price and inventory of PT7M8218B11CEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B11CEX is usually 5 days.
3.What payment methods are accepted for PT7M8218B11CEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B11CEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M8218B11CEX?
PT7M8218B11CEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M8218B11CEX 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 PT7M8218B11CEX?
For technical support, including PT7M8218B11CEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B11CEX requirements.
6.How does Aetrix verify that PT7M8218B11CEX is sourced from the original manufacturer or authorized distributors?
All PT7M8218B11CEX 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 PT7M8218B11CEX meets industry standards.
7.What is the process for return or replacement of PT7M8218B11CEX?
All PT7M8218B11CEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B11CEX, 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 PT7M8218B11CEX part is unused and in its original packaging.
Return procedure for PT7M8218B11CEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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