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Microchip Technology MIC5255-2.7YD5-TR
- Part No.:
- MIC5255-2.7YD5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
MIC5255-2.7YD5-TR.pdf
- Description:
- IC REG LIN 2.7V 150MA TSOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,181
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Product details
Overview
MIC5255-2.7YD5-TR from Micrel is a 2.7V fixed-output, 150mA ultra-low-noise CMOS LDO regulator in a 5-pin Thin SOT-23-5 (1mm height) package, featuring 135mV dropout at full load, 30µV(rms) output noise, and TTL-compatible enable control - optimized for RF-sensitive battery-powered systems such as cellular accessories and portable computing.
For engineers reviewing the MIC5255-2.7YD5-TR datasheet, MIC5255-2.7YD5-TR pinout, MIC5255-2.7YD5-TR application, or MIC5255-2.7YD5-TR equivalent, key selection criteria include low-noise performance under ceramic capacitor stabilization, zero-current shutdown behavior, and thermal robustness in space-constrained handheld designs.
Technical Context
The MIC5255-2.7YD5-TR uses a CMOS pass element with active-clamp shutdown and internal reference bypassing via dedicated BYP pin. Its architecture enables stable regulation with 1µF ceramic input/output capacitors and supports fast transient response without external compensation.
It operates across 2.7V–6.0V input range with ±1% initial output accuracy and integrates thermal shutdown (150°C trip), current limiting (160–425mA), and ESD protection (2kV HBM). The enable input accepts TTL logic levels (VIH ≥ 1.6V, VIL ≤ 0.4V) and draws only 0.01µA in both states.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.7V ±1% initial accuracy - ensures precise biasing for 2.7V-core RF ICs and low-voltage microcontrollers. |
| Max Output Current | 150mA continuous - sufficient to power baseband processors, RF front-end ICs, or sensor subsystems in compact devices. |
| Dropout Voltage | 135mV @ 150mA - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline (3.2V min) with margin. |
| Output Noise | 30µV(rms), 10Hz–100kHz - meets stringent RF supply cleanliness requirements without additional filtering. |
| Quiescent Current | 90µA typical @ no load - extends battery life in always-on monitoring or standby modes. |
| Enable Logic | TTL-compatible EN pin (VIH ≥ 1.6V, VIL ≤ 0.4V) - interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | 150°C trip with 10°C hysteresis - protects against sustained overload in sealed enclosures with limited airflow. |
Pinout & Package
Package: 5-pin Thin SOT-23-5 (TSOT-23-5), 2.0mm × 2.1mm × 1.0mm body height, exposed pad not present (non-MLF variant).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Supply Input | Accepts 2.7V–6.0V unregulated input; requires 1µF ceramic bypass to GND for stability. |
| 2 - GND | Ground Reference | Common return path for input, output, enable, and bypass circuits; must be low-impedance. |
| 3 - EN | Enable/Shutdown Input | Active-high TTL input; drives regulator ON when ≥1.6V, OFF when ≤0.4V; must not float. |
| 4 - BYP | Noise Bypass Terminal | Connects to 0.01µF–1.0µF capacitor to GND to reduce reference noise and improve PSRR. |
| 5 - OUT | Regulated Output | Delivers stable 2.7V ±1%; requires ≥1µF ceramic output capacitor (X7R/X5R) for stability. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP capacitor - eliminates need for post-LDO LC filters in RF signal chains. |
| Ceramic capacitor compatibility | Stable with 1µF X7R/X5R output cap (ESR ≤ 300mΩ) - reduces board area vs. tantalum/electrolytic solutions. |
| Active shutdown clamp | Internal N-MOSFET discharges output during disable - prevents residual voltage hold-up on downstream loads. |
| Zero-off-mode current | ≤1µA shutdown current - preserves battery charge during extended sleep cycles in portable electronics. |
| High accuracy over temperature | ±2% output tolerance across –40°C to +125°C - supports industrial-grade operation without calibration. |
Applications
| Cellular Accessories | Portable Computing |
|---|---|
|
Use Scenario: Powering Bluetooth headsets and USB-C audio adapters with tight EMI constraints. IC Role / Device Role / Timing Role: Primary 2.7V supply for RF transceiver and codec ICs. Use Value: 30µV(rms) noise prevents AM/FM interference in analog audio paths and maintains Bluetooth BER. |
Use Scenario: Regulating core voltage for low-power microcontrollers in handheld diagnostic tools. IC Role / Device Role / Timing Role: Standby-mode LDO enabling instant wake-from-sleep functionality. Use Value: 90µA quiescent current and zero-off-mode behavior extend battery runtime by >30% vs. legacy LDOs. |
| RF Front-End Modules | IoT Sensor Nodes |
|
Use Scenario: Supplying local oscillator and mixer stages in sub-GHz ISM band transceivers. IC Role / Device Role / Timing Role: Clean 2.7V rail decoupled via BYP pin to suppress phase noise. Use Value: Dedicated BYP pin with 0.01µF cap reduces integrated phase noise by >10dB in 10kHz–1MHz offset bands. |
Use Scenario: Powering MEMS accelerometers and BLE SoCs in battery-operated environmental monitors. IC Role / Device Role / Timing Role: Always-on LDO maintaining RTC and sensor bias during deep-sleep intervals. Use Value: No-load stability and ±1% accuracy ensure reliable sensor calibration and timekeeping over temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2027PDQNR | 2.7V fixed, 300mA, 12µV(rms) noise, 0.5µA IQ, WSON-6 package | Lower noise and IQ, but requires 0.22µF minimum output cap and lacks BYP pin for further noise reduction | Preferred where ultra-low IQ dominates over BYP flexibility and board space allows WSON-6 footprint |
| AP2210K-2.7TRG1 | 2.7V fixed, 150mA, 45µV(rms) noise, 120µA IQ, SOT-23-5 package | Higher noise and IQ, no BYP pin, but AEC-Q100 qualified for automotive accessory use | Selected when automotive qualification outweighs noise/IQ trade-offs in infotainment peripheral supplies |
Compared with MIC5255-2.7YD5-TR, TPS7A2027PDQNR delivers lower noise and IQ but forfeits the design flexibility of the BYP pin, while AP2210K-2.7TRG1 trades noise performance for automotive compliance - making MIC5255-2.7YD5-TR optimal for cost-sensitive, RF-critical consumer handhelds.
Availability
MIC5255-2.7YD5-TR is available at Aetrix Electronics and suitable for cellular accessories, portable computing, and IoT sensor nodes requiring stable component supply with guaranteed long-term availability and traceable sourcing.
Supply support for MIC5255-2.7YD5-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 analog and mixed-signal semiconductor company founded in 1978, acquired by Microchip Technology in 2015; known for high-performance power management and timing solutions.
The MIC5255 product line was designed specifically for ultra-low-noise, space-constrained battery-powered RF systems - emphasizing ceramic capacitor compatibility, minimal height packaging, and precision regulation without external components.
FAQ
What is the maximum input voltage rating for MIC5255-2.7YD5-TR?
The absolute maximum input voltage for MIC5255-2.7YD5-TR is +7V, but the recommended operating range is +2.7V to +6.0V per the datasheet. Exceeding 6.0V risks violating safe operating area limits, especially under load, due to internal power dissipation constraints in the Thin SOT-23-5 package.
Does MIC5255-2.7YD5-TR require an external bypass capacitor on the BYP pin?
No - the BYP pin on MIC5255-2.7YD5-TR may be left open, but connecting a 0.01µF ceramic capacitor to GND reduces output noise to 30µV(rms). Larger values (up to 1.0µF) further improve PSRR at the cost of slightly increased turn-on time, enabled by the device's quick-start circuit.
Can MIC5255-2.7YD5-TR operate with no load connected to the OUT pin?
Yes - MIC5255-2.7YD5-TR remains stable and in regulation with zero load, a feature critical for CMOS RAM keep-alive and real-time clock backup applications. This behavior is verified across –40°C to +125°C 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 MIC5255-2.7YD5-TR package?
The MIC5255-2.7YD5-TR in its Thin SOT-23-5 (D5) package has a junction-to-ambient thermal resistance (θJA) of 235°C/W on a minimum footprint PCB, per Micrel's characterization. Layout improvements - such as 1"² copper pour - can reduce θJA to 185°C/W, enabling higher continuous current in thermally constrained designs.
Is MIC5255-2.7YD5-TR pin-compatible with other MIC5255 variants in the same package?
Yes - all MIC5255-x.xYD5 variants (e.g., MIC5255-2.5YD5, MIC5255-3.3YD5) share identical pinout, footprint, and electrical interface in the Thin SOT-23-5 package. Only the output voltage differs; no PCB changes are required when substituting between voltage options within the D5 suffix family.
MIC5255-2.7YD5-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):
- 2.7V
- 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
MIC5255-2.7YD5-TR FAQ
1.How can I place an order for MIC5255-2.7YD5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5255-2.7YD5-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 MIC5255-2.7YD5-TR reliable?
The price and inventory of MIC5255-2.7YD5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5255-2.7YD5-TR is usually 5 days.
3.What payment methods are accepted for MIC5255-2.7YD5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5255-2.7YD5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5255-2.7YD5-TR?
MIC5255-2.7YD5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5255-2.7YD5-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 MIC5255-2.7YD5-TR?
For technical support, including MIC5255-2.7YD5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5255-2.7YD5-TR requirements.
6.How does Aetrix verify that MIC5255-2.7YD5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5255-2.7YD5-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 MIC5255-2.7YD5-TR meets industry standards.
7.What is the process for return or replacement of MIC5255-2.7YD5-TR?
All MIC5255-2.7YD5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5255-2.7YD5-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 MIC5255-2.7YD5-TR part is unused and in its original packaging.
Return procedure for MIC5255-2.7YD5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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