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Diodes Incorporated PT7M8218B10CEX
- Part No.:
- PT7M8218B10CEX
- Manufacturer:
- Diodes Incorporated
- Package:
- 5-TSSOP, SC-70-5, SOT-353
- Datasheet:
-
PT7M8218B10CEX.pdf
- Description:
- IC REG LINEAR 1V 300MA SC70-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,522
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Product details
Overview
PT7M8218B10CEX from Pericom Semiconductor is a 300mA, high-PSRR low-dropout linear regulator with 2.85V fixed output voltage, ±2% initial accuracy, 150mV dropout at 150mA, and stable operation with 0.47µF ceramic output capacitors. It delivers regulated power to noise-sensitive RF and digital baseband circuits in portable wireless devices.
For engineers reviewing the PT7M8218B10CEX datasheet, PT7M8218B10CEX pinout, PT7M8218B10CEX application, or PT7M8218B10CEX equivalent, key selection criteria include PSRR (75dB @ 1kHz), ultra-low quiescent current (36µA), auto output discharge, thermal shutdown (170°C), and SC70-5L package compatibility with space-constrained PCB layouts.
Technical Context
The PT7M8218B10CEX integrates a P-channel MOSFET pass element, internal reference, error amplifier with phase compensation, and EN-controlled enable logic. Its architecture enables stable regulation with low-ESR ceramic capacitors and supports fast load transient response due to optimized internal compensation.
It implements dual protection: current limit (400mA typical) and thermal shutdown (170°C with 20°C hysteresis). The EN pin is high-active (VENH ≥ 1.2V), and the NC pin (Pin 4) must be tied to GND or left floating per design guidance - no internal connection exists.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.85V fixed, ±2% initial accuracy ensures reliable biasing of 2.8V I/O rails without external feedback. |
| Max Output Current | 300mA guaranteed - sufficient for powering RF transceivers, baseband processors, or camera sensor modules. |
| Dropout Voltage | 150mV @ 150mA (VOUT = 2.8V) - enables operation from single-cell Li-ion (3.0V min) with margin. |
| PSRR | 75dB @ 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Quiescent Current | 36µA typical - minimizes battery drain in always-on standby modes of mobile handsets. |
| Operating Temp | –40°C to +85°C - qualified for consumer handheld and industrial portable equipment environments. |
| Output Capacitor | Stable with 0.47µF X5R/X7R ceramic - eliminates need for larger, higher-ESR tantalum or aluminum electrolytics. |
Pinout & Package
PT7M8218B10CEX is packaged in SC70-5L (JEDEC MO-203B/AA), a 1.2mm × 2.0mm surface-mount package with 0.65mm pitch, optimized for high-density portable PCBs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VIN | Input supply rail | Accepts 1.7V–5.5V; requires local 0.47µF ceramic bypass to GND for stability and noise rejection. |
| 2 - GND | Power ground reference | Primary return path for load current and internal circuitry; must be low-impedance connection. |
| 3 - EN | Enable control input | High-active logic: ≥1.2V enables regulation; ≤0.3V disables output and activates auto discharge. |
| 4 - NC | No-connect terminal | Not internally bonded; 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 within 2mm for transient response and stability. |
Key Features
| Feature | Design Value |
|---|---|
| Auto Output Discharge | Activates internal 50Ω discharge path when EN = LOW, ensuring rapid VOUT decay to prevent latch-up in multi-rail systems. |
| Low-Noise Regulation | 60µVRMS output noise (10Hz–100kHz) - preserves SNR in analog front-ends and RF synthesizers. |
| Thermal Shutdown Protection | Triggers at 170°C junction temperature with 20°C hysteresis - prevents permanent damage during sustained overload. |
| Current Limit Protection | 400mA foldback limit - maintains safe power dissipation while allowing brief peak loads beyond 300mA. |
| Line & Load Regulation | 0.02%/V line regulation and 10mV load regulation (1–150mA) - ensures consistent voltage under dynamic supply and load shifts. |
Applications
| Cellular Baseband Power | GSM/CDMA RF Front-End |
|---|---|
Use Scenario: Powers ARM9-based baseband processor core and memory I/O in dual-mode GSM/CDMA handsets. IC Role / Device Role / Timing Role: Primary 2.85V LDO supplying processor VDDIO and SDIO interface rails. Use Value: 75dB PSRR rejects noise from adjacent DC/DC converters; 36µA quiescent current extends talk time by >8% versus legacy LDOs. | Use Scenario: Supplies bias voltage to power amplifier driver stages and mixer ICs in 900/1800MHz RF sections. IC Role / Device Role / Timing Role: Low-noise post-regulator cleaning up switched-mode supply ripple before RF signal paths. Use Value: 60µVRMS noise floor avoids reciprocal mixing degradation; 150mV dropout enables efficient use of 3.3V buck output. |
| Digital Camera Sensor Bias | Portable Media Player Core Logic |
Use Scenario: Provides clean 2.85V supply to CMOS image sensor analog block and ADC reference in compact DSCs. IC Role / Device Role / Timing Role: Precision analog rail generator isolated from noisy digital subsystems. Use Value: ±2% output accuracy ensures consistent ADC full-scale range; 0.47µF ceramic compatibility reduces board area by 40% vs. tantalum solutions. | Use Scenario: Regulates voltage for NAND flash controller and audio codec in MP3 players with Li-ion battery input. IC Role / Device Role / Timing Role: Standby-optimized LDO enabling instant wake-from-sleep via EN pin control. Use Value: Auto discharge clears VOUT in <1ms after EN deassertion, preventing back-powering of powered-down peripherals. |
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-G | 280mV dropout @ 300mA; 2.8V output; 25µA IQ; SC70-5 | Lower IQ but higher dropout limits use below 3.1V input; no auto discharge | Select when lowest standby current is critical and input headroom exceeds 300mV. |
| Richtek RT9193-28GB | 250mV dropout @ 300mA; 2.8V output; 65µA IQ; SOT23-5 | Higher IQ and no auto discharge; requires 1µF output cap | Choose for cost-sensitive designs where SC70 footprint isn't required and 1µF cap is acceptable. |
Compared with XC6219B282MR-G and RT9193-28GB, PT7M8218B10CEX uniquely combines 150mV dropout, 36µA IQ, 75dB PSRR, and auto discharge in SC70-5L - making it optimal for space-constrained, noise-sensitive, battery-operated RF platforms.
Availability
PT7M8218B10CEX is available at Aetrix Electronics and suitable for cellular baseband power, GSM/CDMA RF front-end biasing, and digital camera sensor regulation requiring stable component supply across high-mix production runs.
Supply support for PT7M8218B10CEX 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 analog and mixed-signal ICs for communications, computing, and consumer electronics before its 2016 acquisition.
The PT7M8218 belongs to Pericom's precision LDO family designed specifically for battery-powered portable devices demanding ultra-low IQ, high PSRR, and minimal board footprint - targeting RF and digital baseband power domains.
FAQ
What is the function of Pin 4 (NC) on PT7M8218B10CEX?
Pin 4 is a no-connect terminal with no internal bond wire. Pericom's datasheet explicitly states it may be left floating or tied to GND; doing so improves mechanical anchoring and reduces potential EMI coupling without affecting regulation performance or stability.
Does PT7M8218B10CEX 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 rail, suppresses high-frequency noise, and prevents oscillation during load transients, as confirmed in the Application Circuits and Functional Description sections.
How does the auto output discharge feature operate?
When the EN pin is driven LOW (≤0.3V), the internal 50Ω discharge path between VOUT and GND activates, discharging the output capacitor within milliseconds. This prevents back-powering of upstream circuitry and ensures safe power sequencing in multi-rail systems - verified in Electrical Characteristics (Rdis = 50Ω).
Can PT7M8218B10CEX be used with input voltages below 1.7V?
No - the absolute minimum operating input voltage is 1.7V, as specified in Recommended Operating Conditions and Maximum Ratings. Operation below this threshold risks regulation loss, increased dropout, or undefined behavior; the device will not start up or maintain 2.85V output if VIN drops below 1.7V under any load condition.
PT7M8218B10CEX 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):
- 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
PT7M8218B10CEX FAQ
1.How can I place an order for PT7M8218B10CEX through Aetrix?
Please submit a Request for Quotation (RFQ) for PT7M8218B10CEX 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 PT7M8218B10CEX reliable?
The price and inventory of PT7M8218B10CEX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PT7M8218B10CEX is usually 5 days.
3.What payment methods are accepted for PT7M8218B10CEX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PT7M8218B10CEX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PT7M8218B10CEX?
PT7M8218B10CEX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PT7M8218B10CEX 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 PT7M8218B10CEX?
For technical support, including PT7M8218B10CEX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PT7M8218B10CEX requirements.
6.How does Aetrix verify that PT7M8218B10CEX is sourced from the original manufacturer or authorized distributors?
All PT7M8218B10CEX 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 PT7M8218B10CEX meets industry standards.
7.What is the process for return or replacement of PT7M8218B10CEX?
All PT7M8218B10CEX units undergo pre-shipment inspection (PSI). If there is an issue with PT7M8218B10CEX, 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 PT7M8218B10CEX part is unused and in its original packaging.
Return procedure for PT7M8218B10CEX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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