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Microchip Technology MIC5259-2.85BML-TR
- Part No.:
- MIC5259-2.85BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5259-2.85BML-TR.pdf
- Description:
- IC REG LINEAR 2.85V 300MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,795
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Product details
Overview
MIC5259-2.85BML-TR from Micrel is a 300mA, 2.85V fixed-output CMOS LDO voltage regulator in a 6-pin 2mm × 2mm MLF® package, featuring 1.5% initial output accuracy, 300mV dropout at full load, and 30µV(rms) output noise - optimized for RF power rails in battery-powered handheld devices.
For engineers reviewing the MIC5259-2.85BML-TR datasheet, MIC5259-2.85BML-TR pinout, MIC5259-2.85BML-TR application, or MIC5259-2.85BML-TR equivalent, key selection criteria include PSRR (70dB @ 1kHz), enable-input logic compatibility (VIH = 1.6V, VIL = 0.4V), thermal shutdown (150°C), and ceramic-capacitor stability with 1µF COUT and 0.01µF CBYP.
Technical Context
The MIC5259-2.85BML-TR employs a CMOS pass element with active-clamp shutdown and internal reference bypassing via dedicated BYP pin, enabling ultra-low-noise regulation without external error amplifier compensation. Its architecture supports fast transient response and maintains regulation down to zero load.
It operates across 2.7V–6.0V input range with TTL-compatible enable control, delivering stable 2.85V output under ±3% total accuracy over –40°C to +125°C. The device integrates current limiting (350–475mA), thermal shutdown with 10°C hysteresis, and ground current as low as 105µA at light load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±1.5% initial accuracy - ensures precise biasing for RF ICs and low-voltage microcontrollers. |
| Dropout Voltage | 300mV @ 300mA - enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline sources. |
| PSRR | 70dB @ 1kHz - suppresses switching noise from DC/DC converters feeding the LDO input rail. |
| Output Noise | 30µV(rms), 10Hz–100kHz - meets stringent spectral purity requirements for VCOs and PLLs. |
| Quiescent Current | 105µA typical @ light load - extends battery life in always-on sensor or standby circuits. |
| Enable Threshold | VIH = 1.6V, VIL = 0.4V - interfaces directly with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | 150°C with 10°C hysteresis - prevents permanent damage during sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (exposed pad), RoHS-compliant, moisture-sensitive level 3. Thermal resistance θJA = 90°C/W (min footprint).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable/Shutdown Input | CMOS-compatible active-high control; must be pulled high (>1.6V) to enable output; floating prohibited. |
| 2 - GND | Ground Reference | Primary return path for load, quiescent, and bypass currents; connects to exposed thermal pad. |
| 3 - IN | Supply Input | Accepts 2.7V–6.0V; requires 1µF ceramic bypass to GND for stability and noise rejection. |
| 4 - OUT | Regulated Output | Delivers 2.85V @ up to 300mA; requires ≥1µF low-ESR ceramic capacitor for loop stability. |
| 5 - NC | No Connect | Internally unconnected; no electrical function; may be left floating or tied to GND per layout needs. |
| 6 - BYP | Reference Bypass | Connects 0.01µF capacitor to GND to reduce output noise by filtering internal bandgap reference. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP capacitor - eliminates need for post-LDO LC filtering in sensitive RF stages. |
| Active shutdown clamp | Internal N-MOSFET discharges OUT pin when EN = low - prevents back-powering of downstream circuitry during sleep mode. |
| Ceramic-capacitor stability | Stable with 1µF X7R/X5R ceramic output capacitor (ESR ≤ 300mΩ) - reduces board area vs. tantalum alternatives. |
| Zero-off-mode current | ≤1µA shutdown current - enables multi-year battery life in IoT endpoint devices with infrequent wake cycles. |
| Fast transient response | Sub-10µs recovery from 50–300mA load steps - maintains voltage integrity during burst-mode processor operation. |
Applications
| Cellular Front-End Power | Low-Power Microcontroller Core Rail |
|---|---|
Use Scenario: Powering RF transceiver ICs (e.g., PA, LNA, mixer) in GSM/UMTS handsets where supply ripple directly impacts EVM and adjacent-channel leakage. IC Role / Device Role / Timing Role: Ultra-low-noise local voltage source replacing noisy switched-mode supplies; provides clean 2.85V bias independent of system rail fluctuations. Use Value: Enables 30µV(rms) noise floor compliance required for <–45dBc ACLR in 3GPP Band 1 transmission. |
Use Scenario: Supplying core logic and SRAM of ARM Cortex-M0+ MCUs in wearable health monitors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Primary regulated rail with enable control synchronized to BLE advertising intervals; supports deep-sleep current <1µA. Use Value: Delivers 105µA quiescent current and zero-off-mode shutdown - extends CR2032 battery life beyond 24 months in intermittent-sensing mode. |
| Portable Audio Codec Bias | Industrial Sensor Signal Chain |
Use Scenario: Providing analog supply to stereo audio codecs in Bluetooth headphones, where PSRR directly affects THD+N performance. IC Role / Device Role / Timing Role: Low-noise analog VDDA rail decoupled from noisy digital VDDIO; leverages 70dB PSRR to reject 1MHz DC/DC ripple. Use Value: Achieves <–95dB THD+N at 1kHz by suppressing switching artifacts that would otherwise modulate audio paths. |
Use Scenario: Powering precision op-amps and 24-bit delta-sigma ADCs in battery-operated environmental sensors deployed in remote locations. IC Role / Device Role / Timing Role: Stable 2.85V reference rail for signal conditioning stages; maintains 1.5% output accuracy across –40°C to +85°C industrial range. Use Value: Eliminates calibration drift caused by supply-induced gain error - enables ±0.1% measurement accuracy without periodic recalibration. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B285MR-G | 280mA rating, 25µV(rms) noise, 250mV dropout @ 200mA; SOT-25 package (5-pin) | Lacks BYP pin and active shutdown clamp; lower max output current limits use in high-pulse-load scenarios. | Preferred where minimal board area and lowest possible noise are prioritized over discharge control and 300mA headroom. |
| Analog Devices ADP160ACBZ-2.85-R7 | 150mA rating, 22µV(rms) noise, 195mV dropout @ 150mA; 5-ball WLCSP package | Lower current capability and no BYP pin; higher PSRR (80dB @ 1kHz) but narrower input range (2.2V–5.5V). | Selected for space-constrained, low-current applications where ultra-miniaturization outweighs need for 300mA drive and active discharge. |
Compared with MIC5259-2.85BML-TR, the XC6219B285MR-G offers lower noise but sacrifices shutdown discharge control and current headroom, while the ADP160ACBZ-2.85-R7 delivers superior PSRR and size reduction at the cost of 50% lower output current and no noise-bypass flexibility.
Availability
MIC5259-2.85BML-TR is available at Aetrix Electronics and suitable for cellular front-end power, low-power microcontroller core rails, portable audio codec bias, and industrial sensor signal chain applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MIC5259-2.85BML-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 electronics - emphasizing ceramic-capacitor compatibility, fast transient response, and enable-controlled power gating.
FAQ
What is the maximum input voltage for MIC5259-2.85BML-TR?
The absolute maximum input voltage for MIC5259-2.85BML-TR is +7V, but the recommended operating range is +2.7V to +6.0V per its electrical specifications. Exceeding 6.0V risks violating safe operating area limits even if within absolute max ratings, especially under high ambient temperature or load conditions. Always maintain VIN ≤ 6.0V for reliable long-term operation.
Does MIC5259-2.85BML-TR require an external bypass capacitor on the BYP pin?
MIC5259-2.85BML-TR does not require the BYP pin to be used, but connecting a 0.01µF capacitor from BYP to GND reduces output noise from 30µV(rms) to ~15µV(rms) and improves PSRR at higher frequencies. Leaving BYP open results in nominal noise performance - acceptable for non-RF applications - but forfeits the lowest-noise capability built into the device.
Can MIC5259-2.85BML-TR operate without an output capacitor?
No - MIC5259-2.85BML-TR requires a minimum 1µF low-ESR ceramic capacitor on the OUT pin for stability. Omitting it causes oscillation and unregulated output. The device is optimized for X7R/X5R dielectrics with ESR ≤ 300mΩ; using smaller or high-ESR capacitors violates stability criteria and may result in rail collapse under load transients.
What is the thermal shutdown behavior of MIC5259-2.85BML-TR?
MIC5259-2.85BML-TR activates thermal shutdown at 150°C junction temperature and remains latched off until junction cools by 10°C (hysteresis), resuming regulation at ~140°C. During shutdown, the device draws <1µA and the active clamp discharges the output capacitor. This protects against permanent damage during sustained overload or inadequate PCB copper area.
Is MIC5259-2.85BML-TR pin-compatible with other MIC5259 variants in the MLF package?
Yes - all MIC5259-x.xBML and MIC5259-x.xYML variants share identical 6-pin 2mm × 2mm MLF® pinout, including EN, GND, IN, OUT, NC, and BYP. Voltage variants differ only in internal feedback network; thus, MIC5259-2.85BML-TR can be substituted for other BML/YML versions on the same footprint, provided input/output voltage margins and load requirements remain compatible.
MIC5259-2.85BML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 6-VDFN Exposed Pad, 6-MLF®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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)
MIC5259-2.85BML-TR FAQ
1.How can I place an order for MIC5259-2.85BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5259-2.85BML-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 MIC5259-2.85BML-TR reliable?
The price and inventory of MIC5259-2.85BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5259-2.85BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5259-2.85BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5259-2.85BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5259-2.85BML-TR?
MIC5259-2.85BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5259-2.85BML-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 MIC5259-2.85BML-TR?
For technical support, including MIC5259-2.85BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5259-2.85BML-TR requirements.
6.How does Aetrix verify that MIC5259-2.85BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5259-2.85BML-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 MIC5259-2.85BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5259-2.85BML-TR?
All MIC5259-2.85BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5259-2.85BML-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 MIC5259-2.85BML-TR part is unused and in its original packaging.
Return procedure for MIC5259-2.85BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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