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Microchip Technology MIC5259-3.0BML-TR
- Part No.:
- MIC5259-3.0BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5259-3.0BML-TR.pdf
- Description:
- IC REG LINEAR 3V 300MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,701
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Product details
Overview
MIC5259-3.0BML-TR from Micrel is a 3.0V, 300mA ultra-low-noise 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 stages and battery-powered handheld devices requiring clean, stable bias.
For engineers reviewing the MIC5259-3.0BML-TR datasheet, MIC5259-3.0BML-TR pinout, MIC5259-3.0BML-TR application, or MIC5259-3.0BML-TR equivalent, key selection criteria include PSRR (70dB @ 1kHz), enable-input logic compatibility (TTL), ceramic-capacitor stability, thermal shutdown behavior, and low-quiescent-current shutdown mode (≤1µA).
Technical Context
The MIC5259-3.0BML-TR integrates a precision bandgap reference with active noise cancellation and a quick-start bypass circuit, enabling fast turn-on even with a 0.01µF CBYP capacitor. Its CMOS pass element delivers low ground current (105µA typical at light load) and supports active-clamp discharge during shutdown.
It operates across 2.7V–6.0V input range with tight line regulation (±0.3%/V) and load regulation (±0.6% over 0.1mA–300mA), while maintaining stability with ≥1µF ceramic output capacitors and ESR ≤300mΩ - eliminating need for tantalum or electrolytic alternatives.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.0V ±1.5% initial accuracy ensures reliable core/bias rail for 3.3V-tolerant RF ICs and microcontrollers. |
| Max Output Current | 300mA continuous delivery supports moderate-power RF front-ends and sensor subsystems without thermal derating in MLF package. |
| Dropout Voltage | 300mV @ 300mA enables operation from single-cell Li-ion (3.0V min) or two-cell alkaline (3.0V after discharge) with margin. |
| Output Noise | 30µV(rms), 10Hz–100kHz, minimizes phase noise in VCOs and ADC reference supplies. |
| PSRR | 70dB @ 1kHz suppresses switching noise from DC/DC converters feeding the LDO input. |
| Quiescent Current | 105µA @ light load and ≤1µA in shutdown extend battery life in always-on sensor nodes. |
| Enable Logic | TTL-compatible EN pin (VIH ≥1.6V, VIL ≤0.4V) allows direct interfacing with 1.8V/3.3V GPIO without level shifters. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (exposed pad), RoHS-compliant, θJA = 90°C/W on minimum footprint - suitable for space-constrained portable PCBs with thermal relief via soldered exposed pad.
| 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 3.0V ±1.5%; requires ≥1µF ceramic capacitor (X7R/X5R) to GND for loop stability. |
| 5 - NC | No Connect | Internally unconnected; no external connection required or recommended. |
| 6 - BYP | Noise Bypass Terminal | Connects to 0.01µF–1.0µF capacitor to GND to reduce reference noise and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low output noise | 30µV(rms) enables use in sensitive RF receiver chains and high-resolution analog signal paths without added filtering. |
| Active shutdown clamp | Internal N-MOSFET discharges output capacitance rapidly upon disable, preventing backfeed into powered-down circuitry. |
| Ceramic capacitor stability | Stable with ≥1µF X7R/X5R ceramics (ESR ≤300mΩ), eliminating bulkier, less reliable tantalum solutions. |
| Zero-off-mode current | ≤1µA shutdown current preserves battery charge in sleep modes of wearables and IoT endpoints. |
| High PSRR at low VIN | 70dB @ 1kHz maintained down to VIN = VOUT + 0.3V, critical for battery-voltage droop scenarios. |
Applications
| Cellular RF Front-End Power | Portable Medical Sensor Bias |
|---|---|
Use Scenario: Powers low-noise amplifiers (LNAs) and mixer bias rails in 4G/5G handset transceivers where supply ripple directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Ultra-low-noise 3.0V LDO providing clean analog supply independent of noisy PMIC switchers. Use Value: 30µV(rms) noise and 70dB PSRR prevent degradation of RF signal integrity under dynamic load conditions. | Use Scenario: Supplies precision analog front-end (AFE) and ADC reference in battery-operated glucose monitors and pulse oximeters. IC Role / Device Role / Timing Role: Stable, low-drift 3.0V rail for ratiometric sensor excitation and reference voltage generation. Use Value: 1.5% initial accuracy and ±3.0% over temperature ensure measurement repeatability without calibration drift. |
| Industrial Handheld Scanner | Wireless Audio Earbud MCU Core |
Use Scenario: Powers image sensor interface and decode ASIC in rugged barcode scanners operating from 2xAA or Li-Po batteries. IC Role / Device Role / Timing Role: Primary 3.0V system rail with fast transient response to handle burst-mode imaging loads. Use Value: 300mV dropout enables >90% battery utilization; active-clamp shutdown prevents residual current drain during idle scan intervals. | Use Scenario: Supplies 32-bit Bluetooth LE MCU core and DSP in ultra-compact earbuds with strict size and thermal constraints. IC Role / Device Role / Timing Role: Compact-area, thermally efficient 3.0V regulator in 2mm × 2mm MLF package with GPIO-controllable enable. Use Value: 90°C/W θJA and 105µA quiescent current allow sustained operation within 30mm³ enclosure without thermal throttling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3002E/MB | 250mA max output, 170mV dropout @ 250mA, 33µV(rms) noise, SOT-23-5 only | Limited to lower-current digital rails; lacks BYP pin for noise tuning | Select when board space permits SOT-23-5 and noise requirements are relaxed. |
| TLS850F3TBV50 | Automotive-grade AEC-Q100, 500mA, 200mV dropout, integrated reset, PG pin | Designed for automotive infotainment; higher cost, larger TSON-10 package | Select only for automotive qualification-critical designs requiring watchdog/reset functionality. |
Compared with MCP1700-3002E/MB and TLS850F3TBV50, the MIC5259-3.0BML-TR uniquely balances RF-grade noise performance (30µV), compact MLF packaging, and TTL-enable compatibility - making it optimal for consumer wireless and portable medical devices where size, noise, and GPIO simplicity are co-prioritized.
Availability
MIC5259-3.0BML-TR is available at Aetrix Electronics and suitable for cellular RF front-ends, portable medical sensors, industrial handheld scanners, wireless audio earbuds, and battery-powered instrumentation requiring stable component supply with consistent parametric performance and long-term sourcing continuity.
Supply support for MIC5259-3.0BML-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 MIC5259 product line was designed specifically for ultra-low-noise, high-PSRR LDO applications in battery-powered RF and portable electronics - emphasizing ceramic-capacitor compatibility, fast transient response, and minimal shutdown current.
FAQ
What is the maximum input voltage rating for MIC5259-3.0BML-TR?
The absolute maximum input voltage for MIC5259-3.0BML-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 and may trigger internal protection circuits. For reliable long-term operation, keep VIN ≤6.0V - especially critical when paired with high-ESR input sources or under thermal stress.
Does MIC5259-3.0BML-TR require an external bypass capacitor on the BYP pin?
While MIC5259-3.0BML-TR remains functional without a BYP capacitor, a 0.01µF ceramic capacitor to GND is strongly recommended to achieve the specified 30µV(rms) output noise and optimal PSRR. Omitting it degrades noise performance by up to 3× and reduces PSRR by ~15dB at 1kHz. The BYP pin may be left open only if noise sensitivity is non-critical.
Can MIC5259-3.0BML-TR operate stably with zero load current?
Yes, MIC5259-3.0BML-TR maintains regulation and stability with no load - a key design feature confirmed in the datasheet's "No-Load Stability" section. This enables use in CMOS RAM keep-alive circuits and always-on monitoring nodes where standby current must remain near zero without risking oscillation or dropout.
What is the thermal resistance (θJA) of MIC5259-3.0BML-TR in standard PCB layout?
The junction-to-ambient thermal resistance (θJA) for MIC5259-3.0BML-TR is 90°C/W on a minimum footprint layout, per Micrel's Package Information document. With 1"² copper pour, θJA improves to ~60°C/W. This allows 300mA operation up to ~70°C ambient when using the exposed pad for thermal conduction - verified in the Thermal Considerations section of the MIC5259-3.0BML-TR datasheet.
Is the NC pin on MIC5259-3.0BML-TR required to be grounded or left floating?
The NC (No Connect) pin on MIC5259-3.0BML-TR is internally unconnected and must remain unconnected - neither grounded nor tied to any voltage. Connecting it may cause unpredictable behavior or damage. The datasheet explicitly states "NC - No Connect" in the Pin Description table and confirms no internal bond wire or circuit node is attached to pin 5.
MIC5259-3.0BML-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):
- 3V
- 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)
MIC5259-3.0BML-TR FAQ
1.How can I place an order for MIC5259-3.0BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5259-3.0BML-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 MIC5259-3.0BML-TR reliable?
The price and inventory of MIC5259-3.0BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5259-3.0BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5259-3.0BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5259-3.0BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5259-3.0BML-TR?
MIC5259-3.0BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5259-3.0BML-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 MIC5259-3.0BML-TR?
For technical support, including MIC5259-3.0BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5259-3.0BML-TR requirements.
6.How does Aetrix verify that MIC5259-3.0BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5259-3.0BML-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 MIC5259-3.0BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5259-3.0BML-TR?
All MIC5259-3.0BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5259-3.0BML-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 MIC5259-3.0BML-TR part is unused and in its original packaging.
Return procedure for MIC5259-3.0BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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