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Microchip Technology MIC5259-2.5BML-TR
- Part No.:
- MIC5259-2.5BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5259-2.5BML-TR.pdf
- Description:
- IC REG LINEAR 2.5V 300MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,186
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Product details
Overview
MIC5259-2.5BML-TR from Micrel is a 2.5V, 300mA CMOS low-dropout linear regulator optimized for RF and battery-powered systems. It delivers 1.5% initial output accuracy, 300mV dropout at full load, 30µV(rms) output noise, and 70dB PSRR at 1kHz - enabling clean power delivery in sensitive analog and wireless circuits.
For engineers reviewing the MIC5259-2.5BML-TR datasheet, MIC5259-2.5BML-TR pinout, MIC5259-2.5BML-TR application, or MIC5259-2.5BML-TR equivalent, this page provides verified specifications, MLF-6 package terminal mapping, ultra-low-noise design context, and validated alternative LDOs for handheld, portable, and low-ESR ceramic-capacitor-based power rails.
Technical Context
The MIC5259-2.5BML-TR integrates a precision bandgap reference with active noise cancellation via dedicated BYP pin, supporting 0.01µF–1.0µF external bypass capacitors to suppress reference noise. Its CMOS pass element enables TTL-compatible enable control and near-zero shutdown current (≤1µA).
It operates across 2.7V–6.0V input while maintaining regulation down to 300mV dropout at 300mA, with thermal shutdown (150°C) and current limit (350–475mA) protection. Stability is guaranteed with ≥1µF low-ESR ceramic output capacitors (X7R/X5R recommended, ESR ≤300mΩ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1.5% initial accuracy; ensures stable biasing for ADC references and RF ICs without external feedback. |
| Dropout Voltage | 300mV at 300mA load; allows operation from single Li-ion (3.0V min) or dual alkaline cells with margin. |
| Output Noise | 30µV(rms), 10Hz–100kHz; minimizes phase noise in VCOs and jitter in high-speed data converters. |
| PSRR | 70dB at 1kHz; rejects switching noise from DC/DC converters upstream in mixed-signal power domains. |
| Quiescent Current | 105µA typical at light load; extends battery life in always-on sensor nodes and standby modes. |
| Enable Logic | TTL-compatible EN pin (VIH ≥1.6V, VIL ≤0.4V); supports direct microcontroller GPIO control without level-shifting. |
| Thermal Shutdown | 150°C activation with 10°C hysteresis; prevents damage during transient overloads in compact MLF-6 layouts. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF® (MicroLeadFrame), exposed thermal pad, RoHS-compliant, moisture sensitivity level 3.
| 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 state prohibited. |
| 2 - GND | Ground Reference | Primary return path for load, quiescent, and bypass currents; connects to thermal pad for heat dissipation. |
| 3 - IN | Supply Input | Accepts 2.7V–6.0V input; requires 1µF ceramic capacitor to ground for stability and high-frequency decoupling. |
| 4 - OUT | Regulated Output | Delivers 2.5V ±1.5% to load; stable with ≥1µF X7R ceramic capacitor (ESR ≤300mΩ). |
| 5 - NC | No Connect | Internally unconnected; no electrical function; must remain unconnected on PCB. |
| 6 - BYP | Noise Bypass Terminal | Connects to 0.01µF capacitor to ground to reduce reference noise; improves PSRR and output spectral purity. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low noise output | 30µV(rms) enables use in RF front-ends, PLLs, and precision analog signal chains without additional filtering. |
| Active shutdown clamp | Internal N-MOSFET discharges output capacitor when disabled, preventing back-powering of downstream circuitry. |
| Ceramic capacitor stability | Guaranteed stability with 1µF X7R/X5R ceramics (no tantalum or electrolytic required), reducing board area by >50% vs legacy LDOs. |
| Low dropout + high PSRR synergy | 300mV dropout at 300mA combined with 70dB PSRR at 1kHz maintains clean 2.5V rail even under noisy, low-headroom conditions. |
| No-load regulation | Maintains 2.5V output with zero load current - critical for CMOS RAM keep-alive and real-time clock backup supplies. |
Applications
| Cellular Front-End Power | Portable Medical Sensor Bias |
|---|---|
|
Use Scenario: Powering RF transceiver VCOs and LNA bias rails in GSM/UMTS handsets where supply ripple directly impacts EVM and adjacent channel leakage. IC Role / Device Role / Timing Role: Ultra-low-noise 2.5V source for analog RF subsystems; replaces noisier switching regulators or higher-dropout LDOs. Use Value: 30µV(rms) noise and 70dB PSRR reduce phase noise floor by >8dB, improving receiver sensitivity and transmit spectral purity. |
Use Scenario: Providing stable excitation voltage to piezoresistive pressure sensors and low-noise instrumentation amplifiers in wearable ECG monitors. IC Role / Device Role / Timing Role: Precision analog supply with <1.5% initial accuracy and no-load regulation for sensor signal conditioning stages. Use Value: Eliminates drift-induced baseline wander and enables sub-µV resolution in 24-bit delta-sigma ADC front-ends. |
| Laptop USB-C PD Interface | Industrial Handheld Scanner |
|
Use Scenario: Generating clean 2.5V for USB Type-C controller logic and CC line termination resistors in portable docking stations. IC Role / Device Role / Timing Role: Low-quiescent, enable-controlled auxiliary rail that powers only during USB enumeration and negotiation phases. Use Value: 105µA IQ and <1µA shutdown current extend battery runtime between host connections without sacrificing response time. |
Use Scenario: Supplying barcode image sensor array and FPGA configuration I/O banks in ruggedized warehouse scanners operating on 2xAA batteries. IC Role / Device Role / Timing Role: High-PSRR, low-dropout regulator sustaining 2.5V output as battery voltage declines from 3.2V to 2.7V under load. Use Value: 300mV dropout ensures uninterrupted operation down to end-of-battery life, avoiding premature system reset or image corruption. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7A2025PDQNR | Lower IQ (6.5µA), but higher noise (12µV(rms) typ), 200mA rating, DQN package (1.2mm × 1.6mm). | Better for ultra-low-power always-on sensing; less suitable for RF noise-critical paths requiring 30µV(rms) performance. | Select when battery life dominates over RF spectral purity; verify thermal derating at 300mA in smaller DQN footprint. |
| MCP1703T-2502E/MB | Higher dropout (500mV @ 250mA), lower PSRR (60dB @ 1kHz), SOT-23-5 package, no BYP pin. | Cost-optimized for non-RF consumer electronics; lacks noise-bypass capability and fast transient response. | Choose for cost-sensitive, non-noise-critical 2.5V rails where board space permits larger input/output caps and higher dropout is acceptable. |
Compared with TPS7A2025PDQNR and MCP1703T-2502E/MB, the MIC5259-2.5BML-TR uniquely balances 300mA drive, 30µV(rms) noise, and BYP-pin flexibility - making it the only option among the three qualified for RF transceiver bias and precision analog sensor excitation in space-constrained MLF layouts.
Availability
MIC5259-2.5BML-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable medical sensor bias, and industrial handheld scanner designs requiring stable component supply with guaranteed long-term sourcing.
Supply support for MIC5259-2.5BML-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., acquired by Microchip Technology in 2015, specialized in high-performance analog, power management, and timing solutions for communications and industrial markets.
The MIC5259 family was designed specifically for ultra-low-noise, high-PSRR power delivery in battery-operated RF and portable computing devices - emphasizing ceramic-capacitor compatibility and minimal board footprint.
FAQ
What is the maximum input voltage for MIC5259-2.5BML-TR?
The absolute maximum input voltage for MIC5259-2.5BML-TR is +7V, but the recommended operating range is +2.7V to +6.0V per its Electrical Characteristics table. Exceeding 6.0V risks violating safe operating area limits even if within absolute max ratings, especially under thermal stress or high load.
Does MIC5259-2.5BML-TR require an external bypass capacitor on the BYP pin?
MIC5259-2.5BML-TR does not require the BYP capacitor to operate, but omitting it degrades output noise performance: 30µV(rms) is specified with 0.01µF on BYP. Without it, noise increases significantly, compromising suitability for RF and precision analog applications where MIC5259-2.5BML-TR is typically deployed.
Can MIC5259-2.5BML-TR be used with Y5V ceramic output capacitors?
MIC5259-2.5BML-TR can physically accept Y5V capacitors, but they are not recommended: Y5V dielectrics lose up to 60% capacitance over temperature, risking instability below minimum 1µF effective value. X7R or X5R ceramics are specified for reliable operation across –40°C to +125°C junction range.
What is the thermal resistance (θJA) of MIC5259-2.5BML-TR in standard layout?
The MIC5259-2.5BML-TR has a junction-to-ambient thermal resistance (θJA) of 90°C/W for the 2mm × 2mm MLF® package with minimum recommended footprint, per Micrel's Package Information table. This value assumes standard 1-inch square copper cladding; actual θJA depends on PCB copper area and layer count.
Is the NC pin on MIC5259-2.5BML-TR electrically isolated?
Yes, Pin 5 (NC) on MIC5259-2.5BML-TR is internally unconnected and electrically isolated. It must remain unconnected on the PCB - no routing, soldering, or grounding - to avoid unintended coupling or mechanical stress on the die bond wire.
MIC5259-2.5BML-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):
- 2.5V
- 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)
MIC5259-2.5BML-TR FAQ
1.How can I place an order for MIC5259-2.5BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5259-2.5BML-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 MIC5259-2.5BML-TR reliable?
The price and inventory of MIC5259-2.5BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5259-2.5BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5259-2.5BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5259-2.5BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5259-2.5BML-TR?
MIC5259-2.5BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5259-2.5BML-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 MIC5259-2.5BML-TR?
For technical support, including MIC5259-2.5BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5259-2.5BML-TR requirements.
6.How does Aetrix verify that MIC5259-2.5BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5259-2.5BML-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 MIC5259-2.5BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5259-2.5BML-TR?
All MIC5259-2.5BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5259-2.5BML-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 MIC5259-2.5BML-TR part is unused and in its original packaging.
Return procedure for MIC5259-2.5BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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