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Microchip Technology MIC5255-2.85YML-TR
- Part No.:
- MIC5255-2.85YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5255-2.85YML-TR.pdf
- Description:
- IC REG LINEAR 2.85V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,323
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Product details
Overview
MIC5255-2.85YML-TR from Micrel is a 150mA, 2.85V fixed-output CMOS low-dropout regulator in a 6-pin 2mm × 2mm MLF® package, delivering 1% initial accuracy, 135mV dropout at full load, and ultra-low 30µV(rms) output noise - optimized for RF power rails in battery-powered handheld devices.
For engineers reviewing the MIC5255-2.85YML-TR datasheet, MIC5255-2.85YML-TR pinout, MIC5255-2.85YML-TR application, or MIC5255-2.85YML-TR equivalent, key selection criteria include noise-sensitive analog/RF supply requirements, ceramic capacitor compatibility, TTL-compatible enable control, thermal performance in compact layouts, and shutdown leakage below 1µA.
Technical Context
The MIC5255-2.85YML-TR employs a CMOS pass element with active-clamp shutdown and internal reference bypassing via dedicated BYP pin. Its architecture supports stable operation with 1µF ceramic input/output capacitors and enables fast transient response without external compensation.
It integrates thermal shutdown (150°C trip, 10°C hysteresis), current limit (160–425mA), and logic-controlled enable with VIH ≥ 1.6V and VIL ≤ 0.4V - all specified across –40°C to +125°C junction temperature range and compatible with 2.7V–6.0V input.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±1% initial accuracy ensures precise biasing for 2.8V–3.0V logic or RF ICs. |
| Dropout Voltage | 135mV @ 150mA allows regulation from 3.0V input - critical for single-cell Li-ion or Li-poly systems. |
| Output Noise | 30µV(rms), 10Hz–100kHz with 0.01µF BYP capacitor - meets stringent RF LNA/VCO supply cleanliness requirements. |
| Quiescent Current | 90µA typical at no load; <1µA in shutdown - extends battery life in always-on sensor or standby circuits. |
| PSRR | 60dB @ 10Hz/100Hz, 50dB @ 10kHz - suppresses switching noise from upstream DC/DC converters. |
| Enable Threshold | VIH = 1.6V min, VIL = 0.4V max - interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Resistance | θJA = 90°C/W (MLF package) - supports 150mA continuous output in space-constrained PCB layouts. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (exposed pad grounded), footprint-compatible with industry-standard 2×2 QFN layouts and optimized for low-inductance thermal dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable input | TTL-compatible active-high control; must be pulled high (>1.6V) to enable output; floating not allowed. |
| 2 - GND | Ground reference | Main signal ground and thermal path; exposed pad (Pin EP) internally connected and must be externally tied to GND. |
| 3 - IN | Input supply | Accepts 2.7V–6.0V; requires 1µF ceramic bypass to GND for stability and noise rejection. |
| 4 - BYP | Noise bypass | Connects to 0.01µF–1.0µF capacitor to GND to reduce reference noise and improve PSRR. |
| 5 - OUT | Regulated output | Delivers 2.85V at up to 150mA; requires ≥1µF low-ESR ceramic capacitor for stability. |
| 6 - NC | No connection | Internally unconnected; no electrical function; may be left floating or tied to GND for mechanical rigidity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP cap - enables clean power for RF front-ends and precision ADCs. |
| Ceramic capacitor stability | Stable with ≥1µF X7R/X5R ceramic output cap (ESR ≤ 300mΩ) - eliminates need for bulky tantalum or electrolytic caps. |
| Active shutdown clamp | Internal N-MOSFET discharges OUT capacitor during disable - prevents residual voltage on downstream circuitry. |
| No-load regulation | Maintains regulation at zero load - essential for CMOS RAM keep-alive and low-power sleep-state applications. |
| Thermal protection | 150°C shutdown with 10°C hysteresis - prevents damage during sustained overload or poor heatsinking. |
Applications
| Cellular Front-End Power | Portable Audio Codec Supply |
|---|---|
Use Scenario: Powering LNA, mixer, and VCO stages in GSM/UMTS/WiFi transceivers where supply ripple directly impacts EVM and phase noise. IC Role / Device Role / Timing Role: Ultra-low-noise local LDO supplying RF signal chain components. Use Value: 30µV(rms) noise and 60dB PSRR at 100Hz suppress switching artifacts from PMIC DC/DC converters. | Use Scenario: Providing clean analog supply to stereo audio codecs in Bluetooth headsets and wearables. IC Role / Device Role / Timing Role: Fixed 2.85V bias rail for DAC/ADC reference and analog I/O stages. Use Value: 1% initial accuracy and <2.5% total variation over temperature ensure consistent SNR and THD performance. |
| Smartwatch Sensor Hub | IoT Edge Node MCU Core Rail |
Use Scenario: Powering MEMS accelerometer, gyroscope, and environmental sensors requiring stable low-noise bias under dynamic load. IC Role / Device Role / Timing Role: Low-quiescent, enable-controlled supply for always-on sensor subsystems. Use Value: 90µA IQ and <1µA shutdown current extend coin-cell or small Li-ion battery life beyond 12 months. | Use Scenario: Delivering regulated core voltage to ARM Cortex-M0+/M4 MCUs in battery-operated edge nodes. IC Role / Device Role / Timing Role: Primary 2.85V core rail with fast enable/disable for duty-cycled wake-up operation. Use Value: 135mV dropout enables >90% efficiency from 3.0V input; active clamp ensures rapid power-down of peripheral domains. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6206P282MR | 2.8V output, 100mA rating, SOT-25 package, no BYP pin, higher 50µV(rms) noise. | Lacks noise-bypass capability and 150mA drive - unsuitable for RF or high-dynamic-range analog loads. | Select when cost sensitivity outweighs noise performance and load current needs are ≤100mA. |
| Analog Devices ADP160ACBZ-2.85-R7 | 2.85V output, 150mA, 22µV(rms) noise, 165mV dropout, WLCSP-4 package, no enable pin. | Superior noise but lacks enable control and uses non-reflowable WLCSP - limits board-level testability and rework. | Select for lowest possible noise in space-constrained designs where enable functionality is handled externally. |
Compared with MIC5255-2.85YML-TR, the XC6206P282MR trades noise and current capability for lower cost and smaller footprint, while the ADP160ACBZ-2.85-R7 achieves lower noise in a more fragile package without integrated enable - making MIC5255-2.85YML-TR the balanced choice for production-ready RF and portable designs requiring control, robustness, and verified noise performance.
Availability
MIC5255-2.85YML-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable audio codec supply, and smartwatch sensor hub applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for MIC5255-2.85YML-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.
The MIC5255 product line was designed specifically for ultra-low-noise, low-quiescent-current regulation in handheld and battery-powered wireless devices - emphasizing RF-clean power delivery, ceramic capacitor compatibility, and compact packaging.
FAQ
What is the maximum input voltage for MIC5255-2.85YML-TR?
The absolute maximum input voltage for MIC5255-2.85YML-TR is +7V, but the recommended operating range is +2.7V to +6.0V per datasheet specifications. Exceeding 6.0V risks violating safe operating area limits even if within absolute maximum ratings, especially under thermal stress or high load conditions.
Does MIC5255-2.85YML-TR require an external bypass capacitor on the BYP pin?
MIC5255-2.85YML-TR does not require the BYP pin to be used - it may be left open. However, connecting a 0.01µF capacitor from BYP to GND reduces output noise to 30µV(rms) and improves PSRR; omitting it increases noise and degrades ripple rejection performance.
Can MIC5255-2.85YML-TR operate without an output capacitor?
No - MIC5255-2.85YML-TR requires a minimum 1µF low-ESR ceramic capacitor on the OUT pin for stability. Omitting it causes high-frequency oscillation and unpredictable regulation. The device is optimized for X7R/X5R dielectrics; Y5V/Z5U types are discouraged due to excessive capacitance drift over temperature.
What is the thermal performance difference between MIC5255-2.85YML-TR and SOT-23 versions?
MIC5255-2.85YML-TR has θJA = 90°C/W (MLF package), significantly better than SOT-23-5 versions (θJA = 235°C/W). This allows MIC5255-2.85YML-TR to sustain 150mA continuously at higher ambient temperatures - e.g., 50°C ambient vs. ~35°C for SOT-23 - without entering thermal shutdown.
Is the NC pin on MIC5255-2.85YML-TR required to be connected?
The NC (No Connect) pin on MIC5255-2.85YML-TR is internally unconnected and serves no electrical function. It may be left floating or tied to GND for mechanical reinforcement of the package during reflow - neither choice affects electrical performance or reliability of MIC5255-2.85YML-TR.
MIC5255-2.85YML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad, 6-MLF®
- 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):
- 2.85V
- 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:
- 6-DFN (2x2)
MIC5255-2.85YML-TR FAQ
1.How can I place an order for MIC5255-2.85YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5255-2.85YML-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 MIC5255-2.85YML-TR reliable?
The price and inventory of MIC5255-2.85YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5255-2.85YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5255-2.85YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5255-2.85YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5255-2.85YML-TR?
MIC5255-2.85YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5255-2.85YML-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 MIC5255-2.85YML-TR?
For technical support, including MIC5255-2.85YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5255-2.85YML-TR requirements.
6.How does Aetrix verify that MIC5255-2.85YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5255-2.85YML-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 MIC5255-2.85YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5255-2.85YML-TR?
All MIC5255-2.85YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5255-2.85YML-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 MIC5255-2.85YML-TR part is unused and in its original packaging.
Return procedure for MIC5255-2.85YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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