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Microchip Technology MIC5252-4.75BML-TR
- Part No.:
- MIC5252-4.75BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5252-4.75BML-TR.pdf
- Description:
- IC REG LINEAR 4.75V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,385
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Product details
Overview
MIC5252-4.75BML-TR from Micrel is a precision 4.75V ultra-low-noise CMOS LDO voltage regulator in a 6-pin 2mm × 2mm MLF™ package, delivering 150mA output with 135mV dropout at full load, 30µV(rms) output noise, and 1% initial accuracy - ideal for RF power supply rails in battery-powered handheld devices.
For engineers reviewing the MIC5252-4.75BML-TR datasheet, MIC5252-4.75BML-TR pinout, MIC5252-4.75BML-TR application, or MIC5252-4.75BML-TR equivalent, key selection criteria include its TTL-compatible enable input, low 90µA quiescent current, high PSRR (≥48dB at 10kHz), ceramic-capacitor stability, and active shutdown clamp for fast load discharge.
Technical Context
The MIC5252-4.75BML-TR integrates a precision bandgap reference with quick-start noise cancellation circuitry and an active N-channel shutdown clamp. Its internal architecture enables stable regulation down to zero load while maintaining 30µV(rms) noise performance when paired with a 0.01µF BYP capacitor.
It operates across 2.7V–6.0V input range with CMOS-level enable logic (VIH ≥ 1.6V, VIL ≤ 0.4V), thermal shutdown at 150°C, and current limit of 250–425mA. The device achieves 50dB PSRR at VO + 0.3V and maintains 1% output accuracy over –40°C to +125°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 4.75V ±1% initial accuracy - ensures precise biasing for sensitive analog/RF circuitry without post-regulation trimming. |
| Dropout Voltage | 135mV @ 150mA - enables operation from single-cell Li-ion (3.0–4.2V) or dual-cell alkaline inputs with minimal headroom loss. |
| Output Noise | 30µV(rms), 10Hz–100kHz - meets stringent spectral purity requirements for VCOs, PLLs, and RF front-end ICs. |
| PSRR | ≥48dB @ 10kHz (VIN = VO + 0.3V) - suppresses switching noise from upstream DC/DC converters in mixed-signal systems. |
| Quiescent Current | 90µA typical - extends battery life in always-on monitoring or standby modes of portable electronics. |
| Enable Logic | TTL-compatible (VIH ≥ 1.6V, VIL ≤ 0.4V); <1µA shutdown current - allows direct interfacing with microcontroller GPIOs without level-shifting. |
| Thermal Shutdown | 150°C with 10°C hysteresis - protects against sustained overload or poor PCB thermal design in compact enclosures. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF™ (MicroLeadFrame) with exposed ground pad (EP). Thermal resistance θJA = 90°C/W on recommended layout - supports 150mA continuous output without external heatsinking in space-constrained designs.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable/Shutdown Input | CMOS-compatible active-high control; must be driven - floating state causes indeterminate output behavior. |
| 2 - GND | Ground Reference | Main signal and power return path; internally connected to exposed pad (EP) - requires solid PCB copper connection for thermal and electrical integrity. |
| 3 - IN | Supply Input | Accepts 2.7V–6.0V input; requires 1µF low-ESR ceramic bypass to GND for stability and transient response. |
| 4 - OUT | Regulated Output | Delivers stable 4.75V; requires ≥1µF ceramic output capacitor (X7R/X5R dielectric) with ESR ≤300mΩ. |
| 5 - NC | No Internal Connection | Unbonded pin - must remain unconnected; no routing or soldering permitted. |
| 6 - BYP | Noise Bypass Terminal | Connects to 0.01µF–1.0µF capacitor to GND to reduce reference noise - directly lowers output RMS noise to 30µV. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP capacitor - eliminates need for secondary filtering in RF power domains. |
| Active shutdown clamp | Internal N-MOSFET discharges output capacitor and load during disable - prevents residual voltage hold-up in power sequencing. |
| Ceramic-capacitor stability | Stable with ≥1µF X7R/X5R ceramic output cap (ESR ≤300mΩ) - eliminates bulkier tantalum or electrolytic capacitors. |
| Faster transient response | Optimized loop compensation enables sub-100µs recovery from 100mA load steps - maintains regulation during burst-mode operation. |
| No-load regulation | Maintains 4.75V output with zero load current - supports CMOS RAM keep-alive and always-on sensor biasing without dummy loads. |
Applications
| Cellular RF Front-End Power | Portable Medical Sensor Bias |
|---|---|
|
Use Scenario: Powering VCOs, LNAs, and mixers in GSM/UMTS/WiFi modules where supply ripple directly impacts EVM and phase noise. IC Role / Device Role / Timing Role: Primary low-noise analog rail regulator providing clean 4.75V bias independent of noisy system DC/DC outputs. Use Value: 30µV(rms) noise and 48dB PSRR at 10kHz prevent degradation of RF signal integrity and adjacent channel rejection. |
Use Scenario: Supplying precision analog front-ends in wearable ECG/SpO₂ monitors operating from coin-cell or LiPo batteries. IC Role / Device Role / Timing Role: Low-quiescent-current LDO delivering stable 4.75V to ADC references and op-amp rails during intermittent sensing bursts. Use Value: 90µA IQ and 1% accuracy ensure >5-year battery life and <0.5% measurement drift across temperature and aging. |
| Laptop Subsystem Voltage Rail | Industrial Handheld Scanner Logic |
|
Use Scenario: Generating dedicated 4.75V supply for PCIe clock buffers or USB PHYs isolated from noisy main 3.3V/5V rails. IC Role / Device Role / Timing Role: Secondary LDO decoupling high-speed digital interfaces from shared power planes to meet jitter and timing margin specs. Use Value: 135mV dropout and 50dB PSRR at VO + 0.3V maintain clean timing margins under dynamic load transients. |
Use Scenario: Powering barcode image sensors and laser drivers in ruggedized handheld scanners powered by replaceable AA/AAA packs. IC Role / Device Role / Timing Role: Enable-controlled LDO enabling rapid power cycling of optical subsystems to conserve battery between scans. Use Value: TTL-compatible EN pin and <1µA shutdown current allow microcontroller-gated power delivery with no external FET or logic. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1703T-4752E/MB | 4.75V output, 250mA rating, 600mV dropout @ 250mA, 40µV(rms) noise, SOT-23-5 package | Higher dropout limits use with lower VIN sources; larger package footprint than MLF™ | Select when higher output current or legacy SOT-23-5 board compatibility is required. |
| Torex XC6209F475MR-G | 4.75V output, 300mA rating, 160mV dropout @ 100mA, 45µV(rms) noise, SOT-25 package | Slightly higher noise and dropout; lacks dedicated BYP pin for noise optimization | Select when cost sensitivity outweighs ultra-low-noise requirement and BYP pin flexibility is not needed. |
Compared with MCP1703T-4752E/MB and XC6209F475MR-G, the MIC5252-4.75BML-TR delivers the lowest noise (30µV vs ≥40µV), smallest footprint (2×2mm MLF™), and unique BYP pin for tunable noise reduction - making it optimal for RF and high-precision analog applications where spectral purity and board area are critical.
Availability
MIC5252-4.75BML-TR is available at Aetrix Electronics and suitable for cellular RF front-ends, portable medical sensors, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MIC5252-4.75BML-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.
The MIC5252 series was designed specifically for ultra-low-noise, low-quiescent-current regulation in battery-powered RF and portable electronics - emphasizing ceramic-capacitor compatibility, fast transient response, and integrated shutdown functionality.
FAQ
What is the maximum input voltage for MIC5252-4.75BML-TR?
The absolute maximum input voltage for MIC5252-4.75BML-TR is +7V, but the recommended operating range is +2.7V to +6.0V. Exceeding 6.0V risks violating safe operating area limits and may trigger thermal shutdown or permanent damage. For reliable 4.75V output at 150mA, VIN should be ≥4.885V (4.75V + 135mV dropout) and ≤6.0V to maintain PSRR and thermal margin.
Does MIC5252-4.75BML-TR require an external bypass capacitor?
Yes, MIC5252-4.75BML-TR requires a capacitor connected from the BYP pin to GND to achieve its specified 30µV(rms) output noise. A 0.01µF ceramic capacitor is recommended; values up to 1.0µF further reduce noise but slightly increase turn-on time. Leaving BYP open degrades noise performance to ~100µV(rms) or higher.
Can MIC5252-4.75BML-TR operate with zero load current?
Yes, MIC5252-4.75BML-TR remains stable and regulated with zero load current - a key differentiator from many LDOs that require minimum load for stability. This capability supports applications like CMOS RAM keep-alive circuits, real-time clocks, and always-on sensor biasing without adding dummy loads or wasting power.
What is the function of the NC pin on MIC5252-4.75BML-TR?
The NC (No Connection) pin on MIC5252-4.75BML-TR is unconnected internally and serves no electrical function. It must not be bonded, routed, or soldered on the PCB. Connecting or routing this pin risks mechanical stress on the die bond wire and may compromise reliability or cause short-circuit faults in high-density layouts.
How does the active shutdown clamp in MIC5252-4.75BML-TR work?
The active shutdown clamp in MIC5252-4.75BML-TR is an internal N-channel MOSFET that connects OUT to GND when EN is low. This rapidly discharges the output capacitor and any attached load capacitance, ensuring fast, controlled power-down without residual voltage - critical for clean power sequencing in multi-rail systems and preventing latch-up in downstream ICs.
MIC5252-4.75BML-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):
- 4.75V
- 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)
MIC5252-4.75BML-TR FAQ
1.How can I place an order for MIC5252-4.75BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5252-4.75BML-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 MIC5252-4.75BML-TR reliable?
The price and inventory of MIC5252-4.75BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5252-4.75BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5252-4.75BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5252-4.75BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5252-4.75BML-TR?
MIC5252-4.75BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5252-4.75BML-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 MIC5252-4.75BML-TR?
For technical support, including MIC5252-4.75BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5252-4.75BML-TR requirements.
6.How does Aetrix verify that MIC5252-4.75BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5252-4.75BML-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 MIC5252-4.75BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5252-4.75BML-TR?
All MIC5252-4.75BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5252-4.75BML-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 MIC5252-4.75BML-TR part is unused and in its original packaging.
Return procedure for MIC5252-4.75BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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