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Microchip Technology MIC5259-2.85YML-TR
- Part No.:
- MIC5259-2.85YML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5259-2.85YML-TR.pdf
- Description:
- IC REG LINEAR 2.85V 300MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,635
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Product details
Overview
MIC5259-2.85YML-TR from Micrel is a 300mA, 2.85V fixed-output CMOS low-dropout regulator in a 6-pin 2mm × 2mm MLF® package, optimized for ultra-low-noise RF power rails. It delivers 1.5% initial output accuracy, 300mV dropout at full load, and 30µV(rms) output noise with 0.01µF bypass capacitor - enabling clean supply for sensitive analog/RF circuitry in space-constrained portable devices.
For engineers reviewing the MIC5259-2.85YML-TR datasheet, MIC5259-2.85YML-TR pinout, MIC5259-2.85YML-TR application, or MIC5259-2.85YML-TR equivalent, key selection criteria include PSRR (70dB @ 1kHz), thermal shutdown (150°C), TTL-compatible enable input, ceramic-capacitor stability, and low quiescent current (105µA at light load) in a thermally efficient MLF package.
Technical Context
The MIC5259-2.85YML-TR employs a CMOS pass element with active-clamp shutdown and internal reference bypassing via dedicated BYP pin. Its architecture supports fast transient response and maintains regulation down to zero load while rejecting ripple across 10Hz–10kHz with ≥53dB PSRR even at VIN = VOUT + 0.3V.
It integrates under-voltage lockout, thermal shutdown with 10°C hysteresis, and current limiting (350–475mA). The enable logic is TTL-compatible (VIH ≥ 1.6V, VIL ≤ 0.4V), and ground current remains stable (120–250µA at 300mA) without load-dependent drift.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±1.5% (initial), ±3.0% over –40°C to +125°C - ensures stable bias for RF front-end ICs and precision ADCs. |
| Dropout Voltage | 300mV @ 300mA - enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline with margin. |
| Output Noise | 30µV(rms), 10Hz–100kHz with 0.01µF BYP cap - meets stringent spectral purity requirements for GSM/Bluetooth transceivers. |
| PSRR | 70dB @ 1kHz; ≥53dB @ 10kHz (VIN = VOUT + 0.3V) - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Quiescent Current | 105µA @ 100µA load; 0.2–1µA in shutdown - extends battery life in always-on sensor nodes and standby modes. |
| Enable Threshold | VIH = 1.6V min, VIL = 0.4V max - interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | 150°C activation with 10°C hysteresis - prevents thermal runaway during sustained 300mA loads in compact enclosures. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (exposed pad), θJA = 90°C/W - provides superior thermal performance vs. SOT-23-5 (θJA = 235°C/W) for high-current portable designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable/Shutdown Input | TTL-compatible active-high control; must be driven - floating state causes indeterminate output. |
| 2 - GND | Ground Reference | Power and signal return path; connects to exposed thermal pad for optimal heat dissipation. |
| 3 - IN | Supply Input | Accepts 2.7V–6.0V input; requires 1µF ceramic bypass to GND for stability and noise rejection. |
| 4 - OUT | Regulated Output | Delivers 2.85V ±1.5%; requires ≥1µF low-ESR ceramic capacitor (X7R/X5R) for loop stability. |
| 5 - NC | No Connect | Internally unconnected; no external connection required - leave unpopulated or float. |
| 6 - BYP | Reference Bypass | Connects 0.01µF–1.0µF capacitor to GND to reduce output noise and improve PSRR; optional but recommended for RF apps. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP cap - eliminates need for post-LDO RC filtering in RF power stages. |
| Active-clamp shutdown | Internal N-MOSFET discharges output capacitor on disable - prevents residual voltage hold-up on powered-down subsystems. |
| Ceramic-capacitor stability | Stable with ≥1µF X7R/X5R ceramic output caps (ESR ≤ 300mΩ) - reduces board area vs. tantalum/electrolytic solutions. |
| No-load regulation | Maintains regulation at 0mA load - supports CMOS RAM keep-alive and real-time clock backup without dummy loading. |
| High PSRR at low VIN | ≥53dB PSRR at VIN = VOUT + 0.3V - sustains noise rejection even as battery voltage drops near cutoff. |
Applications
| Cellular Transceiver Power | Portable Medical Sensor Bias |
|---|---|
Use Scenario: Powering GSM/EDGE PA driver stages and RF synthesizer VCOs in handheld radios. IC Role / Device Role / Timing Role: Ultra-low-noise 2.85V supply rail for analog RF blocks requiring minimal phase noise contribution. Use Value: 30µV(rms) noise and 70dB PSRR prevent AM-to-PM conversion and adjacent-channel interference in transmit paths. |
Use Scenario: Providing stable bias to low-power ECG/PPG analog front-ends in wearable health monitors. IC Role / Device Role / Timing Role: Precision low-noise voltage source for instrumentation amplifiers and sigma-delta ADC references. Use Value: 1.5% initial accuracy and <0.3%/V line regulation ensure consistent gain calibration across battery discharge cycles. |
| Industrial Handheld Scanner | IoT Edge Node Microcontroller Core |
Use Scenario: Supplying image sensor interface and laser driver circuits in rugged barcode scanners. IC Role / Device Role / Timing Role: Low-dropout regulator enabling operation from 3.0V nominal Li-ion cells down to end-of-life voltage. Use Value: 300mV dropout at 300mA allows >200mA peak current delivery even at 3.0V input - sustaining laser pulse integrity. |
Use Scenario: Powering ARM Cortex-M0+ core and BLE radio in battery-operated smart sensors. IC Role / Device Role / Timing Role: Enable-controlled power domain for MCU sleep/wake sequencing with sub-µA shutdown current. Use Value: 0.2µA shutdown current and TTL-compatible EN pin simplify low-power state management without external logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-2802E/TO | 250mA rated, 2.8V fixed, SOT-23-5, 175mV dropout @ 250mA, 65µV(rms) noise | Lower current and higher noise - suitable only for non-RF microcontroller I/O rails. | Select when cost sensitivity outweighs RF noise performance and 300mA headroom is unnecessary. |
| Torex XC6206P282MR-G | 300mA rated, 2.8V fixed, SOT-23-5, 350mV dropout @ 300mA, 40µV(rms) noise, no BYP pin | Lacks dedicated noise-bypass pin and has lower PSRR (60dB @ 1kHz) - limits RF system dynamic range. | Choose for space-constrained SOT-23 layouts where MLF thermal advantage is not critical and BYP functionality is omitted. |
Compared with MCP1700-2802E/TO and XC6206P282MR-G, the MIC5259-2.85YML-TR uniquely combines 300mA capability, 30µV(rms) noise with BYP pin support, and 70dB PSRR in an MLF package - making it the only option among the three qualified for RF transceiver supply in compact battery-powered designs.
Availability
MIC5259-2.85YML-TR is available at Aetrix Electronics and suitable for cellular transceiver power, portable medical sensor bias, and industrial handheld scanner applications requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for MIC5259-2.85YML-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; known for high-performance power management and timing solutions.
The MIC5259 family was designed specifically for ultra-low-noise, high-PSRR regulation in battery-powered RF and portable computing systems - emphasizing ceramic-capacitor compatibility, fast transient response, and zero-load stability.
FAQ
What is the maximum input voltage rating for MIC5259-2.85YML-TR?
The absolute maximum input voltage for MIC5259-2.85YML-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 MIC5259-2.85YML-TR require an external bypass capacitor on the BYP pin?
The BYP pin on MIC5259-2.85YML-TR is optional but strongly recommended for RF-sensitive applications: a 0.01µF capacitor to GND reduces output noise to 30µV(rms) and improves PSRR. Leaving BYP open degrades noise performance but maintains basic regulation functionality.
Can MIC5259-2.85YML-TR operate with zero load current?
Yes, MIC5259-2.85YML-TR is explicitly characterized for no-load stability and remains in regulation with 0mA output current - a key feature for CMOS RAM keep-alive, RTC backup, and other ultra-low-power standby functions where dummy loads are undesirable.
What is the thermal resistance (θJA) of the MIC5259-2.85YML-TR package?
The MIC5259-2.85YML-TR uses a 6-pin 2mm × 2mm MLF® package with θJA = 90°C/W under standard PCB layout conditions (minimum footprint). This is significantly lower than the SOT-23-5 variant (235°C/W), enabling reliable 300mA operation in compact thermal environments.
Is the NC pin on MIC5259-2.85YML-TR required to be connected?
No, the NC (No Connect) pin on MIC5259-2.85YML-TR is internally unconnected and must remain unpopulated or electrically floating - connecting it to any net may compromise device reliability or violate internal isolation design rules specified in the Micrel datasheet.
MIC5259-2.85YML-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):
- 0.55V @ 300mA
- Current - Output:
- 300mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 250 µA
- PSRR:
- 65dB ~ 53dB (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)
MIC5259-2.85YML-TR FAQ
1.How can I place an order for MIC5259-2.85YML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5259-2.85YML-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 MIC5259-2.85YML-TR reliable?
The price and inventory of MIC5259-2.85YML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5259-2.85YML-TR is usually 5 days.
3.What payment methods are accepted for MIC5259-2.85YML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5259-2.85YML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5259-2.85YML-TR?
MIC5259-2.85YML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5259-2.85YML-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 MIC5259-2.85YML-TR?
For technical support, including MIC5259-2.85YML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5259-2.85YML-TR requirements.
6.How does Aetrix verify that MIC5259-2.85YML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5259-2.85YML-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 MIC5259-2.85YML-TR meets industry standards.
7.What is the process for return or replacement of MIC5259-2.85YML-TR?
All MIC5259-2.85YML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5259-2.85YML-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 MIC5259-2.85YML-TR part is unused and in its original packaging.
Return procedure for MIC5259-2.85YML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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