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Microchip Technology MIC5255-2.8YD5-TR
- Part No.:
- MIC5255-2.8YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5255-2.8YD5-TR.pdf
- Description:
- IC REG LIN 2.8V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,900
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Product details
Overview
MIC5255-2.8YD5-TR from Micrel is a 150mA, 2.8V fixed-output CMOS low-dropout linear regulator in a 5-pin Thin SOT-23-5 package, delivering 1% initial accuracy, 135mV dropout at full load, and ultra-low 30µV(rms) output noise-designed for RF-sensitive battery-powered systems such as cellular accessories and portable computing.
For engineers reviewing the MIC5255-2.8YD5-TR datasheet, MIC5255-2.8YD5-TR pinout, MIC5255-2.8YD5-TR application, or MIC5255-2.8YD5-TR equivalent, key selection criteria include its TTL-compatible enable input, ceramic-capacitor stability, 90µA quiescent current, and noise-bypass pin for RF power rail conditioning.
Technical Context
The MIC5255-2.8YD5-TR employs a CMOS pass element with active-clamp shutdown and internal reference bypassing, enabling fast transient response and near-zero off-state current (≤1µA). Its architecture supports stable operation with 1µF ceramic input/output capacitors and a dedicated 0.01µF bypass capacitor on the BYP pin.
It operates across 2.7V–6.0V input range with thermal shutdown (150°C) and current limit (160–425mA), maintaining ±2% output accuracy over –40°C to +125°C junction temperature while rejecting ripple up to 60dB at 10Hz–10kHz.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.8V ±1% initial accuracy ensures precise biasing for 2.8V logic rails and RF ICs. |
| Dropout Voltage | 135mV at 150mA enables regulation from 3.0V input-critical for single-cell Li-ion or dual-cell alkaline systems. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor-meets stringent RF receiver supply cleanliness requirements. |
| Quiescent Current | 90µA typical at no load; ≤1µA in shutdown-extends battery life in always-on sensor or standby circuits. |
| Enable Input | TTL-compatible (VIH ≥ 1.6V, VIL ≤ 0.4V); active-high with mandatory pull-up/pull-down-prevents floating-induced misoperation. |
| Stability | Guaranteed with ≥1µF low-ESR ceramic output capacitor (X7R/X5R); no minimum ESR required-reduces BOM count and board area. |
| Thermal Protection | Thermal shutdown at 150°C with 10°C hysteresis-prevents damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 5-pin Thin SOT-23-5 (TSOT-23-5), 1mm height, footprint compatible with standard SOT-23-5 but lower profile-ideal for space-constrained handheld designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.7V–6.0V input; requires 1µF ceramic bypass to GND for stability and high-frequency noise suppression. |
| 2 - GND | Ground Reference | Primary return path for load, quiescent, and enable currents; must be low-impedance connection to system ground plane. |
| 3 - EN | Enable/Shutdown Input | CMOS-compatible active-high control; drives output ON when ≥1.6V, OFF when ≤0.4V; must not be left floating. |
| 4 - BYP | Noise Bypass Terminal | Connects external 0.01µF–1.0µF capacitor to GND to shunt reference noise-directly reduces output voltage noise floor. |
| 5 - OUT | Regulated Output | Delivers stable 2.8V to load; requires ≥1µF ceramic output capacitor (X7R/X5R recommended) for loop stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-Low Noise Regulation | 30µV(rms) output noise with BYP pin decoupling-enables clean power for VCOs, LNAs, and ADC reference supplies. |
| Active Shutdown Clamp | Internal N-MOSFET discharges output capacitor and load upon disable-prevents back-powering and ensures safe state transitions. |
| Ceramic-Capacitor Optimized | Stable with 1µF X7R/X5R output cap (ESR ≤300mΩ); eliminates need for tantalum or electrolytic capacitors-improves reliability and saves space. |
| TTL-Compatible Enable | Logic-level interface (VIH=1.6V, VIL=0.4V) allows direct connection to microcontroller GPIO without level-shifting-simplifies control architecture. |
| No-Load Stability | Maintains regulation with zero load current-supports CMOS RAM keep-alive, real-time clock backup, and always-on monitoring circuits. |
Applications
| Cellular Accessories | Portable Computing |
|---|---|
|
Use Scenario: Powering Bluetooth headsets and USB OTG adapters with single-cell Li-ion input. IC Role / Device Role / Timing Role: Primary 2.8V LDO supplying RF transceiver and baseband ICs. Use Value: Ultra-low noise prevents RX desensitization; 135mV dropout extends usable battery range down to 2.93V. |
Use Scenario: Regulating 2.8V supply for SSD controller or display driver in ultrabooks and tablets. IC Role / Device Role / Timing Role: Point-of-load regulator for low-voltage I/O domains requiring tight voltage tolerance. Use Value: 1% initial accuracy ensures compliance with JEDEC 2.8V I/O specs; ceramic stability avoids capacitor aging drift. |
| RF Front-End Modules | Wearable Sensor Hubs |
|
Use Scenario: Providing clean 2.8V bias to GaAs pHEMT amplifiers and mixer ICs in 5G mmWave modules. IC Role / Device Role / Timing Role: Low-noise analog supply rail decoupled via BYP pin to suppress phase noise. Use Value: 30µV(rms) noise enables <–160dBc/Hz phase noise performance; PSRR >50dB at 10kHz rejects switching noise. |
Use Scenario: Powering MEMS accelerometers, optical heart-rate sensors, and BLE SoCs in fitness trackers. IC Role / Device Role / Timing Role: Always-on LDO with shutdown control for intermittent sensing cycles. Use Value: 90µA quiescent current and <1µA shutdown current maximize multi-week battery life; no-load stability maintains RTC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2802E/TT | 250mA rating, 170mV dropout at 250mA, 35µV(rms) noise, SOT-23-3 (no EN/BYP pins) | Lacks enable and noise-bypass pins; requires external logic for shutdown; less suitable for RF-critical paths | Select when cost sensitivity outweighs noise performance and control flexibility |
| Torex XC6206P282MR-G | 150mA, 200mV dropout at 150mA, 40µV(rms) noise, SOT-23-5 (EN only, no BYP) | Missing dedicated BYP pin; higher noise limits use in high-sensitivity RF receivers | Choose for general-purpose 2.8V regulation where BYP functionality is non-essential |
Compared with MIC5255-2.8YD5-TR, MCP1700T-2802E/TT offers higher current but sacrifices noise performance and control features, while XC6206P282MR-G matches current capability but lacks the critical BYP pin for RF-grade noise suppression-making MIC5255-2.8YD5-TR uniquely suited for noise-sensitive, enable-controlled applications.
Availability
MIC5255-2.8YD5-TR is available at Aetrix Electronics and suitable for cellular accessories, portable computing, RF front-end modules, and wearable sensor hubs requiring stable component supply with guaranteed long-term sourcing.
Supply support for MIC5255-2.8YD5-TR 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
Micrel Inc. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. It emphasized high-performance, space-efficient ICs for portable and wireless applications.
The MIC5255 family was designed specifically for ultra-low-noise, low-quiescent-current regulation in battery-powered RF and handheld systems-prioritizing ceramic-capacitor compatibility, minimal footprint, and precision output stability.
FAQ
What is the maximum input voltage for MIC5255-2.8YD5-TR?
The absolute maximum input voltage for MIC5255-2.8YD5-TR is +7V, but the recommended operating range is +2.7V to +6.0V per the datasheet. Exceeding 6.0V risks violating absolute maximum ratings and may trigger thermal shutdown or permanent damage. For reliable 2.8V output at 150mA, VIN should remain ≤5.4V under typical PCB thermal conditions.
Does MIC5255-2.8YD5-TR require an external bypass capacitor on the BYP pin?
MIC5255-2.8YD5-TR does not require the BYP pin to be used-it may be left open-but connecting a 0.01µF capacitor to GND reduces output noise to 30µV(rms). Larger values (up to 1.0µF) further improve PSRR and noise suppression at the cost of slightly increased turn-on time, which is mitigated by the device's quick-start circuit.
Can MIC5255-2.8YD5-TR operate without a load?
Yes, MIC5255-2.8YD5-TR remains stable and in regulation with zero load current-a feature critical for applications like CMOS RAM keep-alive, RTC backup, or always-on sensor monitoring. This behavior is explicitly verified in the datasheet and distinguishes it from many older LDO architectures that oscillate or drop out under no-load conditions.
What is the thermal resistance (θJA) of the MIC5255-2.8YD5-TR package?
The MIC5255-2.8YD5-TR uses the 5-pin Thin SOT-23-5 (D5) package with a junction-to-ambient thermal resistance (θJA) of 235°C/W on a minimum footprint PCB layout. With 1" square copper cladding, θJA improves to 185°C/W. This value determines maximum allowable power dissipation before thermal shutdown activates at 150°C junction temperature.
Is MIC5255-2.8YD5-TR pin-compatible with other MIC5255 variants in the same package?
Yes, all MIC5255 variants in the TSOT-23-5 package-including MIC5255-2.8YD5-TR, MIC5255-3.3YD5-TR, and MIC5255-2.5YD5-TR-share identical pinout (IN, GND, EN, BYP, OUT), allowing board-level voltage optioning without layout changes. Output voltage is set internally and cannot be adjusted externally.
MIC5255-2.8YD5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 6V
- Voltage - Output (Min/Fixed):
- 2.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.25V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- -
- PSRR:
- 60dB ~ 50dB (10Hz ~ 10kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Under Voltage Lockout (UVLO)
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-23-5
MIC5255-2.8YD5-TR FAQ
1.How can I place an order for MIC5255-2.8YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5255-2.8YD5-TR 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 MIC5255-2.8YD5-TR reliable?
The price and inventory of MIC5255-2.8YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5255-2.8YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5255-2.8YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5255-2.8YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5255-2.8YD5-TR?
MIC5255-2.8YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5255-2.8YD5-TR 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 MIC5255-2.8YD5-TR?
For technical support, including MIC5255-2.8YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5255-2.8YD5-TR requirements.
6.How does Aetrix verify that MIC5255-2.8YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5255-2.8YD5-TR 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 MIC5255-2.8YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5255-2.8YD5-TR?
All MIC5255-2.8YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5255-2.8YD5-TR, 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 MIC5255-2.8YD5-TR part is unused and in its original packaging.
Return procedure for MIC5255-2.8YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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