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Microchip Technology MIC5252-2.5BML-TR
- Part No.:
- MIC5252-2.5BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5252-2.5BML-TR.pdf
- Description:
- IC REG LINEAR 2.5V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:2,669
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Product details
Overview
MIC5252-2.5BML-TR from Micrel is a 2.5V fixed-output, 150mA ultra-low-noise CMOS LDO voltage regulator in a 6-pin 2mm × 2mm MLF™ package. It delivers 1% initial output accuracy, 135mV dropout at 150mA, and 30µV(rms) output noise - optimized for RF power stages and precision analog circuitry in battery-powered handheld devices.
For engineers reviewing the MIC5252-2.5BML-TR datasheet, MIC5252-2.5BML-TR pinout, MIC5252-2.5BML-TR application, or MIC5252-2.5BML-TR equivalent, key selection criteria include low-noise performance with bypass capacitor support, TTL-compatible enable control, ceramic-capacitor stability, and thermal shutdown protection across –40°C to +125°C operation.
Technical Context
The MIC5252-2.5BML-TR integrates a precision bandgap reference, error amplifier, and active-clamp shutdown circuit. Its architecture supports fast transient response and maintains regulation down to zero load - critical for CMOS RAM keep-alive and intermittent-power systems.
It features a dedicated BYP pin for external 0.01µF–1.0µF noise-reduction capacitors, achieves 63dB PSRR at 10Hz with bypass, and sustains high PSRR (≥48dB) up to 10kHz under VIN = VOUT + 0.3V conditions - enabling clean supply rails in dense RF front-ends.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.5V ±1% initial accuracy ensures stable biasing for ADC references and RF ICs without trimming. |
| Dropout Voltage | 135mV at 150mA enables operation from 2.7V input - supports single-cell Li-ion or dual-cell alkaline systems. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor - meets stringent RF receiver supply noise requirements. |
| PSRR | 63dB at 10Hz (with BYP); ≥48dB at 10kHz - suppresses switching noise from adjacent DC/DC converters. |
| Quiescent Current | 90µA typical at no load - extends battery life in always-on sensor nodes and standby circuits. |
| Enable Logic | TTL-compatible EN pin (VIH ≥1.6V, VIL ≤0.4V) enables precise system-level power sequencing. |
| Thermal Protection | 150°C shutdown with 10°C hysteresis - prevents damage during sustained overload or poor PCB thermal layout. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF™ (MicroLeadFrame) with exposed thermal pad (EP) internally connected to GND. Requires solder connection of EP to PCB ground plane for optimal thermal performance (θJA = 90°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable/Shutdown Input | Active-high CMOS input; drives regulator ON when ≥1.6V, OFF when ≤0.4V; must not be left floating. |
| 2 - GND | Ground Reference | Primary return path for load and quiescent current; connects to EP for thermal conduction. |
| 3 - IN | Supply Input | Accepts 2.7V–6.0V input; requires 1µF ceramic bypass to GND for stability and noise suppression. |
| 4 - OUT | Regulated Output | Delivers 2.5V ±1% to load; requires ≥1µF low-ESR ceramic capacitor (X7R/X5R) for stability. |
| 5 - NC | No Internal Connection | Unbonded pin; must remain unconnected on PCB - no routing or copper fill allowed. |
| 6 - BYP | Reference Bypass | Connects external 0.01µF–1.0µF capacitor to GND to reduce internal reference noise and improve PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP capacitor - eliminates need for post-LDO RC filtering in sensitive RF paths. |
| Zero-load stability | Maintains regulation with 0mA load - enables direct use in CMOS memory backup and real-time clock circuits. |
| Active shutdown clamp | Internal N-MOSFET discharges OUT capacitor when disabled - prevents residual voltage hold-up on powered-down subsystems. |
| Ceramic capacitor compatibility | Stable with ≥1µF X7R/X5R ceramic output caps (ESR ≤300mΩ) - eliminates bulkier tantalum or electrolytic solutions. |
| High PSRR at low VIN | ≥48dB PSRR at 10kHz with VIN = VOUT + 0.3V - preserves signal integrity when powered from low-headroom sources. |
Applications
| Cellular Front-End Power | Portable Medical Sensors |
|---|---|
|
Use Scenario: Powering RF transceiver VCOs and LNA bias rails in GSM/UMTS modules where supply noise directly impacts EVM and sensitivity. IC Role / Device Role / Timing Role: Low-noise 2.5V supply rail generator with fast enable/disable control for RF subsystem power gating. Use Value: 30µV(rms) noise and 63dB PSRR prevent AM-to-PM distortion in VCOs; EN pin enables synchronized RF turn-on/turn-off with baseband processor. |
Use Scenario: Supplying precision analog front-ends (AFE) in wearable ECG/SpO₂ monitors operating from coin-cell batteries. IC Role / Device Role / Timing Role: Stable 2.5V reference source for 16-bit SAR ADCs and op-amp signal conditioning stages. Use Value: 1% initial accuracy and zero-load stability ensure consistent ADC full-scale range over battery discharge; 90µA IQ extends runtime beyond 72 hours. |
| Wireless IoT Node MCU Core | Industrial Handheld Terminals |
|
Use Scenario: Providing core voltage to ARM Cortex-M0+ microcontrollers in BLE mesh nodes with intermittent wake/sleep cycles. IC Role / Device Role / Timing Role: Always-on LDO with controlled enable timing for deterministic MCU power-up sequencing. Use Value: Active-clamp shutdown discharges output capacitance within 10µs, eliminating leakage-induced wake events; 135mV dropout maximizes usable battery voltage range. |
Use Scenario: Powering display driver ICs and touch controller interfaces in ruggedized warehouse scanners. IC Role / Device Role / Timing Role: Robust 2.5V supply with thermal shutdown and current limit for high-temperature industrial environments. Use Value: 150°C thermal shutdown and –40°C to +125°C operation ensure reliability in non-ventilated enclosures; SOT-23-5 and MLF™ variants support both compact and thermally demanding layouts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-noise LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-2502E/MB | 2.5V, 250mA, 350mV dropout @ 250mA, 40µV(rms) noise, SOT-23-5 only | Lacks BYP pin and active shutdown clamp; higher dropout limits low-VIN use cases | Select when higher output current is required and BYP noise reduction is not critical |
| TCS2117-250MWR | 2.5V, 150mA, 170mV dropout @ 150mA, 25µV(rms) noise, 6-pin DFN (2×2mm) | Lower noise but no enable pin; fixed internal enable logic - no system-level power sequencing | Select when minimal noise is paramount and external enable control is unnecessary |
Compared with MCP1703T-2502E/MB and TCS2117-250MWR, the MIC5252-2.5BML-TR uniquely combines ultra-low noise, an externally controllable enable pin, active output discharge, and ceramic-capacitor stability in a thermally enhanced MLF™ package - making it optimal for RF-critical, battery-constrained, and power-sequenced designs.
Availability
MIC5252-2.5BML-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable medical sensors, wireless IoT node MCU core, and industrial handheld terminals requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for MIC5252-2.5BML-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. was a U.S.-based semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015. Known for high-performance LDOs and Ethernet PHYs.
The MIC5252 family was designed specifically for ultra-low-noise, battery-efficient power delivery in handheld wireless devices - emphasizing PSRR, dropout, and enable-controlled shutdown for RF and portable applications.
FAQ
What is the maximum input voltage rating for MIC5252-2.5BML-TR?
The absolute maximum input voltage for MIC5252-2.5BML-TR is +7V, but the recommended operating range is +2.7V to +6.0V. Exceeding 6.0V may trigger internal protection or degrade long-term reliability. The device's 135mV dropout at 150mA means it operates efficiently down to 2.7V input - ideal for single-cell Li-ion (2.7–4.2V) or dual-cell alkaline (2.7–3.6V) systems. MIC5252-2.5BML-TR must never be operated above 7V, even momentarily.
Does MIC5252-2.5BML-TR require an external bypass capacitor on the BYP pin?
Yes - MIC5252-2.5BML-TR requires an external capacitor (0.01µF to 1.0µF) between the BYP pin and GND to achieve its specified 30µV(rms) output noise and high PSRR. Without this capacitor, output noise increases significantly and PSRR degrades - especially below 10kHz. A 0.01µF C0G/NPO capacitor is recommended for RF-sensitive applications. MIC5252-2.5BML-TR remains functional without it, but does not meet its ultra-low-noise specification.
Can MIC5252-2.5BML-TR operate with zero load current?
Yes - MIC5252-2.5BML-TR is explicitly designed for no-load stability and maintains regulation at 0mA output current. This is confirmed in the Applications Information section and validated by typical characteristics showing stable output voltage across 0–150mA load range. It is suitable for CMOS RAM keep-alive, RTC backup, and other always-on low-power functions where load current drops to zero. MIC5252-2.5BML-TR does not require a minimum load resistor.
What is the function of the NC pin on MIC5252-2.5BML-TR?
The NC (No Connection) pin on MIC5252-2.5BML-TR is physically present but electrically unconnected to any internal circuitry - it is an unbonded pin. Per the Pin Description table, it must remain unconnected on the PCB: no trace, no via, no copper pour. Routing to or terminating the NC pin may cause parasitic coupling or mechanical stress, risking reliability. MIC5252-2.5BML-TR's functionality is fully defined by pins 1–4 and 6; the NC pin serves only mechanical alignment and thermal mass purposes.
How does the active shutdown clamp in MIC5252-2.5BML-TR work?
The active shutdown clamp in MIC5252-2.5BML-TR is an internal N-channel MOSFET that connects the OUT pin to GND when the EN pin is driven low. This rapidly discharges the output capacitor and load, preventing residual voltage from powering downstream circuitry after shutdown. Unlike passive pull-downs, this clamp provides low-impedance discharge (<500Ω typical), ensuring sub-10µs discharge time for 1µF loads. MIC5252-2.5BML-TR uses this feature to eliminate "ghost power" in power-gated RF sections and sensor subsystems.
MIC5252-2.5BML-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):
- 0.25V @ 150mA
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 200 µA
- PSRR:
- 63dB ~ 48dB (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)
MIC5252-2.5BML-TR FAQ
1.How can I place an order for MIC5252-2.5BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5252-2.5BML-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 MIC5252-2.5BML-TR reliable?
The price and inventory of MIC5252-2.5BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5252-2.5BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5252-2.5BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5252-2.5BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5252-2.5BML-TR?
MIC5252-2.5BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5252-2.5BML-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 MIC5252-2.5BML-TR?
For technical support, including MIC5252-2.5BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5252-2.5BML-TR requirements.
6.How does Aetrix verify that MIC5252-2.5BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5252-2.5BML-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 MIC5252-2.5BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5252-2.5BML-TR?
All MIC5252-2.5BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5252-2.5BML-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 MIC5252-2.5BML-TR part is unused and in its original packaging.
Return procedure for MIC5252-2.5BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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