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Microchip Technology MIC5255-2.75YM5-TR
- Part No.:
- MIC5255-2.75YM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC5255-2.75YM5-TR.pdf
- Description:
- IC REG LIN 2.75V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
MIC5255-2.75YM5-TR from Micrel is a 2.75V, 150mA ultra-low-noise CMOS LDO voltage regulator in SOT-23-5 package, featuring 135mV dropout at full load, 30µV(rms) output noise, and TTL-compatible enable control - deployed in RF-sensitive battery-powered systems such as cellular accessories and portable computing.
For engineers reviewing the MIC5255-2.75YM5-TR datasheet, MIC5255-2.75YM5-TR pinout, MIC5255-2.75YM5-TR application, or MIC5255-2.75YM5-TR equivalent, key selection criteria include low-noise performance with bypass capacitor support, zero-off-mode current during shutdown, ceramic-capacitor stability, and thermal shutdown protection across –40°C to +125°C operation.
Technical Context
The MIC5255-2.75YM5-TR uses a CMOS pass element with internal reference bypass (BYP pin) to achieve 30µV(rms) noise over 10Hz–100kHz. Its active-clamp shutdown discharges the output capacitor, enabling fast load de-energization.
It operates from 2.7V to 6.0V input, maintains 1% initial output accuracy, and delivers stable regulation down to zero load - critical for CMOS RAM keep-alive circuits. Ground current remains at 90µA typical under load and drops to ≤1µA in shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.75V ±1% initial accuracy - ensures precise biasing for RF ICs and low-voltage microcontrollers. |
| Max Output Current | 150mA - supports moderate-power subsystems like Bluetooth modules or sensor interfaces without external boost. |
| Dropout Voltage | 135mV @ 150mA - enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline (3.2V) with margin. |
| Output Noise | 30µV(rms), 10Hz–100kHz - meets stringent RF supply cleanliness requirements without additional filtering. |
| Quiescent Current | 90µA typical @ 100µA load - extends battery life in always-on monitoring functions. |
| Enable Logic | TTL-compatible EN pin (VIH ≥1.6V, VIL ≤0.4V) - interfaces directly with 3.3V/2.5V logic without level shifters. |
| Thermal Shutdown | 150°C activation with 10°C hysteresis - prevents damage during sustained overload or poor PCB thermal layout. |
Pinout & Package
Package: 5-pin SOT-23 (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm height, surface-mount, RoHS-compliant.
| 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 | Primary return path for load, quiescent, and enable currents; must be low-impedance connection. |
| 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 0.01µF–1.0µF capacitor to GND to reduce reference noise and improve PSRR. |
| 5 - OUT | Regulated Output | Delivers 2.75V ±1% to load; requires ≥1µF low-ESR ceramic capacitor for loop 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 stability | Stable with ≥1µF X7R/X5R ceramic output cap (ESR ≤300mΩ) - reduces board area vs. tantalum/electrolytic solutions. |
| Zero-off-mode current | ≤1µA shutdown current - preserves battery charge during extended sleep modes in portable devices. |
| Active output discharge | Internal N-MOS clamp discharges OUT pin when disabled - prevents floating voltage on downstream circuitry. |
| No-load regulation | Maintains 2.75V output with 0mA load - supports memory retention and real-time clock backup without dummy loads. |
Applications
| Cellular Accessories | Portable Computing |
|---|---|
Use Scenario: Powering Bluetooth headsets, USB dongles, and smartwatch charging cradles with tight noise budgets. IC Role / Device Role / Timing Role: Primary 2.75V supply for RF transceivers and low-power MCUs. Use Value: 30µV(rms) noise and 135mV dropout enable clean, efficient operation from compact Li-ion cells. | Use Scenario: Regulating core voltage for embedded controllers in thin notebooks and palmtops. IC Role / Device Role / Timing Role: Standby rail generator with enable control synchronized to system sleep/wake states. Use Value: 90µA quiescent current and zero-off-mode behavior extend battery runtime during suspend cycles. |
| RF Front-End Modules | Low-Power Sensor Nodes |
Use Scenario: Supplying LNAs, mixers, and VCOs in GPS/GNSS receivers and IoT wireless gateways. IC Role / Device Role / Timing Role: Ultra-clean analog supply rail decoupled via BYP pin to suppress phase noise. Use Value: 0.01µF BYP capacitor reduces integrated noise by >20dB, improving receiver sensitivity. | Use Scenario: Powering MEMS accelerometers, temperature sensors, and BLE SoCs in battery-operated asset trackers. IC Role / Device Role / Timing Role: Always-on bias source with no-load stability for wake-on-event functionality. Use Value: Maintains 2.75V output at 0mA while consuming <1µA in shutdown - enables multi-year battery life. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700T-2702E/TT | 2.7V fixed output, 250mA rating, 175mV dropout @ 250mA, 35µV(rms) noise, SOT-23-5 | Slightly higher dropout and noise; lacks BYP pin for noise tuning | Select when higher current headroom is needed and noise sensitivity is moderate. |
| TPS7A20275PDQNR | 2.75V fixed output, 300mA rating, 170mV dropout @ 300mA, 12µV(rms) noise, WSON-6 | Lower noise but larger 2mm × 2mm package; no BYP pin; requires different PCB footprint | Select when ultra-low noise dominates over board space and BYP flexibility is not required. |
Compared with MCP1700T-2702E/TT and TPS7A20275PDQNR, the MIC5255-2.75YM5-TR uniquely balances ultra-low noise, adjustable noise filtering via BYP pin, zero-off-mode current, and SOT-23-5 compatibility - making it optimal for space-constrained, RF-critical, battery-sensitive designs where fine-grained noise control matters.
Availability
MIC5255-2.75YM5-TR is available at Aetrix Electronics and suitable for cellular accessories, portable computing, and RF front-end modules requiring stable component supply, long-term lifecycle assurance, and consistent parametric performance across production batches.
Supply support for MIC5255-2.75YM5-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 power management, analog, and RF solutions before its acquisition by Microchip Technology in 2015. It emphasized high-performance, small-footprint ICs for portable and wireless applications.
The MIC5255 family was designed specifically for ultra-low-noise, low-quiescent-current regulation in handheld and battery-powered RF systems - prioritizing noise suppression, ceramic-capacitor compatibility, and intelligent shutdown behavior.
FAQ
What is the minimum input voltage required for MIC5255-2.75YM5-TR to regulate at full load?
The MIC5255-2.75YM5-TR requires a minimum input voltage of 2.7V per absolute ratings, but to sustain 150mA output with 2.75V regulation, VIN must exceed VOUT + dropout. With 135mV typical dropout, the practical minimum is 2.885V. Below 2.7V, the device ceases regulation and enters undervoltage lockout.
Does MIC5255-2.75YM5-TR require an external bypass capacitor on the BYP pin?
No - the BYP pin on MIC5255-2.75YM5-TR may be left open for standard operation. However, connecting a 0.01µF capacitor to GND reduces output noise to 30µV(rms); larger values (up to 1.0µF) further lower noise but slightly increase turn-on time. The MIC5255-2.75YM5-TR includes a quick-start circuit to minimize this delay.
Can MIC5255-2.75YM5-TR operate without any load connected to the OUT pin?
Yes - the MIC5255-2.75YM5-TR remains stable and maintains 2.75V output regulation with zero load, unlike many LDOs that require minimum load current. This feature supports CMOS RAM keep-alive, RTC backup, and other always-on low-power functions without adding dummy resistors or leakage paths.
What is the thermal resistance (θJA) of MIC5255-2.75YM5-TR in its SOT-23-5 package?
The MIC5255-2.75YM5-TR in SOT-23-5 (M5) package has a junction-to-ambient thermal resistance (θJA) of 235°C/W on a minimum footprint PCB, 185°C/W on a 1-inch square copper-clad board, and 145°C/W with optimized thermal vias. These values determine maximum allowable power dissipation before thermal shutdown activates at 150°C.
Is MIC5255-2.75YM5-TR pin-compatible with other MIC5255 variants in the same package?
Yes - all MIC5255-x.xYM5 variants (e.g., MIC5255-2.5YM5, MIC5255-3.3YM5) share identical SOT-23-5 pinout, electrical interface, and thermal characteristics. Only the output voltage differs; no PCB redesign is needed when substituting between fixed-output versions in the same M5 package.
MIC5255-2.75YM5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- 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):
- 2.75V
- 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:
- SOT-23-5
MIC5255-2.75YM5-TR FAQ
1.How can I place an order for MIC5255-2.75YM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5255-2.75YM5-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 MIC5255-2.75YM5-TR reliable?
The price and inventory of MIC5255-2.75YM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5255-2.75YM5-TR is usually 5 days.
3.What payment methods are accepted for MIC5255-2.75YM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5255-2.75YM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5255-2.75YM5-TR?
MIC5255-2.75YM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5255-2.75YM5-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 MIC5255-2.75YM5-TR?
For technical support, including MIC5255-2.75YM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5255-2.75YM5-TR requirements.
6.How does Aetrix verify that MIC5255-2.75YM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC5255-2.75YM5-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 MIC5255-2.75YM5-TR meets industry standards.
7.What is the process for return or replacement of MIC5255-2.75YM5-TR?
All MIC5255-2.75YM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5255-2.75YM5-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 MIC5255-2.75YM5-TR part is unused and in its original packaging.
Return procedure for MIC5255-2.75YM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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