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Diodes Incorporated PT7M8218B20CE
- Part No.:
- PT7M8218B20CE
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PT7M8218B20CE.pdf
- Description:
- IC REG LINEAR 2V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,001
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Product details
Overview
PT7M8218B20CE from Pericom Semiconductor is a 300mA, high-PSRR low-dropout linear regulator with 2.8V fixed output voltage, ±2% initial accuracy, 150mV dropout at 150mA, and 75dB PSRR at 1kHz - designed for power-sensitive portable RF and digital baseband circuits in mobile handsets.
For engineers reviewing the PT7M8218B20CE datasheet, PT7M8218B20CE pinout, PT7M8218B20CE application, or PT7M8218B20CE equivalent, key selection criteria include guaranteed 300mA load capability with 0.47µF ceramic output capacitance, auto-discharge functionality, thermal shutdown at 170°C, and dual SC70-5L/SOT23-5L package support for space-constrained PCB layouts.
Technical Context
The PT7M8218B20CE integrates a P-channel MOSFET pass element, precision bandgap reference, error amplifier with internal phase compensation, and enable-controlled ON/OFF circuitry - enabling stable regulation with low-ESR ceramic capacitors without external compensation. Its architecture delivers tight line/load regulation (0.02%/V and 10mV) across input voltages from 1.7V to 5.5V.
Protection features include current limiting (400mA typical), short-circuit current limiting (40mA), and thermal shutdown with 20°C hysteresis. The EN pin is high-active (VENH ≥1.2V), and the NC pin (Pin 4) is internally unconnected but recommended tied to GND for noise immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±2% initial accuracy - ensures stable core voltage for 2.8V I/O domains in GSM/CDMA baseband ICs. |
| Max Output Current | 300mA guaranteed - supports sustained operation of RF transceivers and camera sensor modules. |
| Dropout Voltage | 150mV @ 150mA (VOUT=2.8V) - enables regulation from 2.95V input, critical for single-cell Li-ion systems under discharge. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from PMIC DC-DC converters feeding adjacent analog blocks. |
| 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 - qualified for consumer handset environments including battery compartment thermal zones. |
| Capacitor Support | Stable with 0.47µF X5R/X7R ceramic output capacitor - eliminates need for bulk tantalum, reducing BOM cost and board area. |
Pinout & Package
PT7M8218B20CE is available in two industry-standard 5-pin packages: SC70-5L (JEDEC MO-203B/AA) and SOT23-5L (JEDEC MO-178C/AA). Both share identical pin assignment and thermal performance profiles.
| 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 current; must be connected directly to PCB ground plane. |
| 3 - EN | Enable control input | High-active logic interface (1.2–5.5V); pulls output to GND when low, enabling fast system-level power sequencing. |
| 4 - NC | No-connect terminal | Internally unconnected; tie to GND for EMI reduction or leave floating per design requirements. |
| 5 - VOUT | Regulated output | Delivers 2.8V ±2% with auto-discharge path (50Ω typical) when EN is deasserted - prevents backfeed into powered-down rails. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low quiescent current | 36µA typical - extends battery life in standby mode without compromising startup time. |
| Auto output discharge | 50Ω internal discharge path - safely drains VOUT within microseconds after EN deactivation, preventing latch-up in multi-rail systems. |
| High PSRR at audio frequencies | 75dB @ 1kHz - isolates sensitive analog audio codecs from digital switching noise on shared power rails. |
| Thermal shutdown with hysteresis | 170°C trip with 20°C hysteresis - prevents thermal cycling during intermittent overload, ensuring reliable recovery. |
| Factory-trimmed output | ±2% initial accuracy over temperature - eliminates need for external feedback resistors or post-assembly calibration. |
Applications
| Mobile Baseband Power | GSM Transceiver Bias |
|---|---|
|
Use Scenario: Supplies clean 2.8V bias to baseband processor I/O banks in dual-mode GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary LDO for digital interface domain, decoupling PMIC switcher ripple before signal integrity-critical data paths. Use Value: 75dB PSRR at 1kHz prevents bit errors caused by DC-DC switching coupling into SDIO or UART lines. |
Use Scenario: Powers RF front-end ICs requiring tightly regulated 2.8V supply during GSM transmit bursts. IC Role / Device Role / Timing Role: Low-noise post-regulator stabilizing PA driver stage voltage under dynamic load transients. Use Value: 150mV dropout enables >95% efficiency at 2.95V input, maximizing battery runtime during peak transmit duty cycles. |
| Digital Camera Sensor Rail | PDA Application Processor Core |
|
Use Scenario: Provides 2.8V to CMOS image sensor analog front-end in compact digital still cameras. IC Role / Device Role / Timing Role: Low-noise analog supply LDO with auto-discharge, synchronized to sensor power-down sequence via EN pin. Use Value: 60µVrms output noise (10Hz–100kHz) prevents fixed-pattern noise in captured images. |
Use Scenario: Delivers 2.8V to application processor I/O pads in legacy PDAs with multi-voltage domain architectures. IC Role / Device Role / Timing Role: Standby-capable LDO enabling selective power gating of peripheral interfaces while maintaining RTC and memory retention. Use Value: 0.05µA standby current (EN=GND) reduces system leakage by >90% versus non-EN LDO 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 XC6219B282MR | 2.8V fixed, 300mA, 70dB PSRR@1kHz, 45µA IQ, SC70-5 | Lacks auto-discharge and EN pin - requires external MOSFET for controlled shutdown. | Select when board space is constrained and auto-discharge is not required. |
| Richtek RT9193-28GB | 2.8V fixed, 300mA, 65dB PSRR@1kHz, 55µA IQ, SOT23-5 | Higher dropout (200mV@150mA) and lower PSRR - less effective for RF noise suppression. | Select when cost sensitivity outweighs PSRR and dropout performance requirements. |
Compared with XC6219B282MR and RT9193-28GB, PT7M8218B20CE uniquely combines 75dB PSRR, 150mV dropout, and integrated auto-discharge - making it optimal for RF-critical, battery-operated handhelds where noise rejection and fast power sequencing are mandatory.
Availability
PT7M8218B20CE is available at Aetrix Electronics and suitable for mobile handset power management, portable camera sensor biasing, and PDA I/O domain regulation requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for PT7M8218B20CE 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.
PT7M8218 belongs to Pericom's ultra-low-noise LDO family targeting RF and mixed-signal subsystems in 2G/3G mobile platforms - emphasizing PSRR, dropout, and capacitor compatibility for miniaturized designs.
FAQ
What is the minimum input voltage required for stable 2.8V output at full 300mA load?
The PT7M8218B20CE requires VIN ≥ VOUT + VDROPOUT = 2.8V + 150mV = 2.95V to maintain regulation at 300mA. At lower loads (e.g., 150mA), dropout remains 150mV; at higher loads up to 300mA, worst-case dropout is 180mV for VOUT ≤2.7V - but since this variant is 2.8V, 2.95V is the verified minimum.
Can the NC pin (Pin 4) be left floating in production designs?
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 board-level noise coupling, especially in high-density RF layouts where stray capacitance could affect EN pin integrity.
Does PT7M8218B20CE support ceramic capacitors smaller than 0.47µF?
No - the device is characterized and stabilized only with ≥0.47µF X5R/X7R ceramic output capacitors. Using smaller values (e.g., 0.22µF) risks instability, overshoot, or oscillation due to insufficient phase margin from the internal compensation network.
How does the auto-discharge function behave during EN deactivation?
When EN is pulled low, the internal 50Ω discharge path between VOUT and GND activates, discharging a 0.47µF output capacitor from 2.8V to <0.1V in approximately 13ms (t ≈ 3 × R × C). This prevents back-powering of upstream circuits and ensures safe power-down sequencing in multi-rail systems.
PT7M8218B20CE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 5-TSSOP, SC-70-5, SOT-353
- 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:
- SC-70-5
PT7M8218B20CE FAQ
1.How can I place an order for PT7M8218B20CE through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M8218B20CE 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 PT7M8218B20CE reliable?
The price and inventory of PT7M8218B20CE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B20CE is usually 5 days.
3.What payment methods are accepted for PT7M8218B20CE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B20CE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M8218B20CE?
PT7M8218B20CE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M8218B20CE 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 PT7M8218B20CE?
For technical support, including PT7M8218B20CE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B20CE requirements.
6.How does Aetrix verify that PT7M8218B20CE is sourced from the original manufacturer or authorized distributors?
All PT7M8218B20CE 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 PT7M8218B20CE meets industry standards.
7.What is the process for return or replacement of PT7M8218B20CE?
All PT7M8218B20CE units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B20CE, 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 PT7M8218B20CE part is unused and in its original packaging.
Return procedure for PT7M8218B20CE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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