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Microchip Technology MIC5252-2.85BML-TR
- Part No.:
- MIC5252-2.85BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5252-2.85BML-TR.pdf
- Description:
- IC REG LINEAR 2.85V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,726
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Product details
Overview
MIC5252-2.85BML-TR from Micrel is a 2.85V 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 in battery-powered handheld devices requiring clean, stable bias.
For engineers reviewing the MIC5252-2.85BML-TR datasheet, MIC5252-2.85BML-TR pinout, MIC5252-2.85BML-TR application, or MIC5252-2.85BML-TR equivalent, key selection criteria include low-noise performance with bypass capacitor support, TTL-compatible enable control, ceramic-capacitor stability, and thermal shutdown protection in compact MLF packaging.
Technical Context
The MIC5252-2.85BML-TR integrates a precision bandgap reference, error amplifier, and PMOS pass device with active-clamp shutdown. Its quick-start noise cancellation circuit enables fast turn-on even with 0.01µF–1µF BYP capacitors, preserving low-noise operation without sacrificing startup speed.
It operates across 2.7V–6.0V input range with high PSRR (48dB @ 10kHz, VIN = VOUT + 0.3V) and maintains regulation down to zero load. The internal thermal shutdown (150°C) and current limit (250–425mA) are fully functional within its –40°C to +125°C junction temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 2.85V ±1% initial accuracy ensures stable bias for 2.8V–3.0V logic rails and RF ICs. |
| Dropout Voltage | 135mV at 150mA enables operation from single-cell Li-ion (3.0V min) or dual-cell NiMH (3.2V min) without headroom loss. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor - meets stringent RF front-end supply requirements. |
| PSRR | 48dB at 10kHz (VIN = VOUT + 0.3V) suppresses switching noise from adjacent DC/DC converters. |
| Quiescent Current | 90µA typical supports multi-week standby in always-on wireless sensors and pagers. |
| Enable Threshold | VIH = 1.6V, VIL = 0.4V - compatible with 1.8V/3.3V GPIO without level-shifting. |
| Thermal Shutdown | 150°C trip with 10°C hysteresis prevents damage during sustained 150mA loads in confined MLF layouts. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF™ (exposed pad grounded), footprint-compatible with industry-standard micro leadframe layouts and reflow-process ready.
| 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 | Main signal and power ground; internally connected to exposed thermal pad - requires external PCB connection. |
| 3 - IN | Supply Input | Accepts 2.7V–6.0V; requires ≥1µF low-ESR ceramic bypass to GND for stability. |
| 4 - OUT | Regulated Output | Delivers 2.85V ±1%; requires ≥1µF ceramic output capacitor (X7R/X5R dielectric recommended). |
| 5 - NC | No Internal Connection | Unbonded pin; must remain unconnected on PCB - no routing or copper fill allowed. |
| 6 - BYP | Noise Bypass Terminal | Connects to internal reference; 0.01µF–1µF capacitor to GND reduces output noise and improves PSRR. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP cap enables direct powering of VCOs, LNAs, and PLLs. |
| Active-clamp shutdown | Internal N-MOSFET discharges output capacitor and load when EN = low - eliminates residual voltage hold-up. |
| Ceramic-capacitor stability | Stable with ≥1µF X7R/X5R ceramic output caps (ESR ≤300mΩ); eliminates need for bulk tantalum or electrolytic. |
| TTL-compatible enable | VIH = 1.6V / VIL = 0.4V allows direct interface with 1.8V/3.3V microcontrollers without external logic. |
| No-load regulation | Maintains 2.85V output with 0mA load - critical for CMOS RAM keep-alive and real-time clock backup circuits. |
Applications
| Cellular Front-End Power | Portable Medical Sensors |
|---|---|
Use Scenario: Powering LNA and mixer stages in GSM/UMTS handset RF transceivers where supply ripple directly impacts EVM and sensitivity. IC Role / Device Role / Timing Role: Low-noise bias regulator providing clean 2.85V rail decoupled via BYP pin to suppress reference noise coupling. Use Value: 30µV(rms) noise and 48dB PSRR at 10kHz prevent baseband interference and maintain >35dB ACLR in transmit path. | Use Scenario: Supplying analog front-end (AFE) and ADC in wearable ECG/SpO₂ monitors operating from coin-cell or small Li-ion batteries. IC Role / Device Role / Timing Role: Precision LDO delivering stable 2.85V for sensor excitation and signal chain bias under dynamic load and temperature variation. Use Value: 1% initial accuracy and <1.5% load regulation ensure consistent gain calibration across 0.1–150mA load range and –20°C to +70°C ambient. |
| Bluetooth Audio Accessories | Industrial Handheld Terminals |
Use Scenario: Regulating power to Bluetooth audio SoC (e.g., CSR8675) and Class-D amplifier in wireless earbuds and speaker docks. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling rapid power cycling of audio subsystem to extend battery life between streaming sessions. Use Value: "Zero" off-mode current (<1µA) and fast enable response (<10µs) reduce quiescent drain and support sub-100ms wake-from-sleep latency. | Use Scenario: Providing regulated 2.85V for barcode scanner laser diode driver and touch controller in ruggedized warehouse scanners. IC Role / Device Role / Timing Role: High-PSRR LDO rejecting noise from motor drivers and display backlight inverters in mixed-signal industrial enclosures. Use Value: 50dB PSRR at VO + 0.3V and thermal shutdown protect against intermittent overloads during continuous scanning duty cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1702T-2852E/MB | 2.85V output, 250mA, 6µA IQ, but no BYP pin and 115µV(rms) noise - lacks ultra-low-noise capability. | Suitable for general-purpose 2.85V logic rails, not RF-sensitive analog blocks. | Select when lowest quiescent current is prioritized over noise performance. |
| TCS2102-2850Y5R | 2.85V output, 150mA, 35µV(rms) noise, BYP pin, but only 2.5V–5.5V input range and no thermal shutdown. | Applicable where input stays above 2.5V and thermal margin is guaranteed by system design. | Select when tighter input range is acceptable and external thermal monitoring exists. |
Compared with MCP1702T-2852E/MB and TCS2102-2850Y5R, the MIC5252-2.85BML-TR uniquely combines ultra-low noise (30µV), integrated thermal shutdown, full 2.7V–6.0V operation, and active-clamp discharge - making it the only choice for RF-critical, thermally constrained, and enable-driven portable designs.
Availability
MIC5252-2.85BML-TR is available at Aetrix Electronics and suitable for cellular accessories, portable medical sensors, and industrial handheld terminals requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MIC5252-2.85BML-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 fabless semiconductor company specializing in power management, timing, and interface ICs before its acquisition by Microchip Technology in 2015.
The MIC5252 product line was designed specifically for ultra-low-noise, high-PSRR LDO regulation in space-constrained, battery-operated RF and portable electronics - emphasizing ceramic-capacitor compatibility and fast transient response.
FAQ
What is the maximum input voltage rating for MIC5252-2.85BML-TR?
The absolute maximum input voltage for MIC5252-2.85BML-TR is +7V, but the recommended operating range is +2.7V to +6.0V per its electrical specifications. Exceeding 6.0V may trigger internal protection or degrade long-term reliability, and operation below 2.7V will cause dropout and loss of regulation. The 2.85V output remains stable across this full 2.7V–6.0V span when load and temperature conditions are within spec.
Does MIC5252-2.85BML-TR require an external bypass capacitor, and what value is recommended?
Yes, MIC5252-2.85BML-TR requires an external capacitor on the BYP pin to achieve its specified 30µV(rms) output noise. A 0.01µF ceramic capacitor (X7R or C0G dielectric) connected from BYP to GND is the standard recommendation. Larger values up to 1µF further reduce noise and improve PSRR, though turn-on time increases slightly - the device's quick-start circuit minimizes this penalty.
Can MIC5252-2.85BML-TR operate with zero load current while maintaining regulation?
Yes, MIC5252-2.85BML-TR is explicitly characterized for no-load stability and maintains 2.85V output regulation with 0mA load - a key differentiator from many competing LDOs. This behavior is confirmed in the "No-Load Stability" section of the datasheet and is essential for applications like CMOS RAM keep-alive, RTC backup, and always-on sensor biasing where load current drops to near-zero between measurements.
What is the thermal resistance (θJA) of the MIC5252-2.85BML-TR in its MLF™ package?
The junction-to-ambient thermal resistance (θJA) for MIC5252-2.85BML-TR in the 6-pin 2mm × 2mm MLF™ package is 90°C/W under standard PCB layout conditions (per datasheet Table 1). This value assumes adequate copper pour connected to the exposed pad. With a maximum junction temperature of +125°C and ambient of +50°C, the device can safely dissipate up to 833mW - sufficient for 150mA at 2.85V output with typical input voltages.
Is the NC pin on MIC5252-2.85BML-TR safe to connect to ground or leave floating?
No - the NC (pin 5) on MIC5252-2.85BML-TR is unconnected internally and must remain electrically isolated. It must not be soldered to ground, routed, or covered with copper pour. Doing so may cause unpredictable behavior or damage due to potential internal parasitic coupling. The datasheet explicitly states "NC - No internal connection" and shows no bond wire to this pad in the pin description diagram.
MIC5252-2.85BML-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):
- 0.25V @ 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)
MIC5252-2.85BML-TR FAQ
1.How can I place an order for MIC5252-2.85BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5252-2.85BML-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 MIC5252-2.85BML-TR reliable?
The price and inventory of MIC5252-2.85BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5252-2.85BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5252-2.85BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5252-2.85BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5252-2.85BML-TR?
MIC5252-2.85BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5252-2.85BML-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 MIC5252-2.85BML-TR?
For technical support, including MIC5252-2.85BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5252-2.85BML-TR requirements.
6.How does Aetrix verify that MIC5252-2.85BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5252-2.85BML-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 MIC5252-2.85BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5252-2.85BML-TR?
All MIC5252-2.85BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5252-2.85BML-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 MIC5252-2.85BML-TR part is unused and in its original packaging.
Return procedure for MIC5252-2.85BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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