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Microchip Technology MIC5252-3.3BML-TR
- Part No.:
- MIC5252-3.3BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 6-VDFN Exposed Pad, 6-MLF®
- Datasheet:
-
MIC5252-3.3BML-TR.pdf
- Description:
- IC REG LINEAR 3.3V 150MA 6MLF
- Quantity:
- Payment:
- Shipping:
Inventory:4,843
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Product details
Overview
MIC5252-3.3BML-TR from Micrel is a precision 3.3V ultra-low-noise CMOS LDO voltage regulator in a 6-pin 2mm × 2mm MLF™ package, delivering 150mA output with 135mV dropout at full load, 1% initial accuracy, and 30µV(rms) output noise - optimized for RF power stages and battery-powered wireless receivers.
For engineers reviewing the MIC5252-3.3BML-TR datasheet, MIC5252-3.3BML-TR pinout, MIC5252-3.3BML-TR application, or MIC5252-3.3BML-TR equivalent, key selection criteria include low-noise performance under ceramic-capacitor stabilization, TTL-compatible enable control with near-zero shutdown current, and thermal robustness in compact handheld layouts.
Technical Context
The MIC5252-3.3BML-TR integrates a precision bandgap reference with active noise cancellation and a quick-start bypass circuit, enabling stable regulation with 0.01µF–1.0µF external BYP capacitor. Its error amplifier drives a PMOS pass device, eliminating shoot-through and supporting fast transient response.
It features an active N-channel shutdown clamp to discharge the output during disable, internal thermal shutdown at 150°C with 10°C hysteresis, and current limiting at 250–425mA. Input voltage range is strictly 2.7V–6.0V; operation below 2.7V is not supported.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±1% initial accuracy ensures stable logic supply for 3.3V microcontrollers and RF ICs without post-regulation trimming. |
| Dropout Voltage | 135mV @ 150mA enables operation from single-cell Li-ion (3.0V min) or dual-cell alkaline (3.2V min) without brownout. |
| Output Noise | 30µV(rms), 10Hz–100kHz, with 0.01µF BYP capacitor - meets stringent spectral purity requirements for VCO biasing and LNA power rails. |
| PSRR | 50dB @ 10Hz, VIN = VOUT + 0.3V - suppresses switching noise from DC/DC converters feeding the LDO input. |
| Quiescent Current | 90µA typical at no load - extends battery life in always-on sensor nodes and standby modes of portable devices. |
| Enable Threshold | VIH = 1.6V min, VIL = 0.4V max - compatible with 1.8V/3.3V GPIO without level-shifting in mixed-voltage SoC designs. |
| Thermal Resistance | θJA = 90°C/W (MLF™ package) - supports 150mA continuous output at 50°C ambient with minimal PCB copper area. |
Pinout & Package
Package: 6-pin 2mm × 2mm MLF™ (MicroLeadFrame™) with exposed ground pad (EP), RoHS-compliant, moisture sensitivity level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable/Shutdown Input | CMOS-compatible active-high control; must be driven - floating state causes indeterminate output. |
| 2 - GND | Ground Reference | Main signal and power return; internally connected to exposed pad (EP) - requires external solder connection to PCB ground plane. |
| 3 - IN | Input Supply | Accepts 2.7V–6.0V; requires ≥1µF low-ESR ceramic capacitor to ground for stability and high-frequency PSRR. |
| 4 - OUT | Regulated Output | Delivers 3.3V ±1% at up to 150mA; requires ≥1µF ceramic capacitor to ground; stable with ESR ≤300mΩ. |
| 5 - BYP | Noise Bypass Terminal | Connects to 0.01µF–1.0µF capacitor to ground to reduce reference noise; omission increases output noise by ~3×. |
| 6 - NC | No Internal Connection | Unbonded die pad; electrically isolated - must not be connected to any net on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low-noise regulation | 30µV(rms) output noise with 0.01µF BYP capacitor enables clean power for RF front-ends and precision ADCs. |
| TTL-compatible enable | VIH = 1.6V min allows direct interfacing with 1.8V/3.3V microcontroller GPIO without pull-up resistors or level shifters. |
| Active shutdown clamp | N-channel MOSFET discharges OUT capacitor during disable - prevents residual voltage hold-up on sensitive downstream circuits. |
| Ceramic capacitor stability | Stable with ≥1µF X7R/X5R ceramic output cap (ESR ≤300mΩ); eliminates need for larger, less reliable tantalum or electrolytic caps. |
| Zero off-mode current | IGND ≤1µA in shutdown - reduces system standby current to sub-microamp levels in battery-gauging and IoT sleep modes. |
Applications
| Cellular Front-End Power | Portable GPS Receiver |
|---|---|
|
Use Scenario: Powers low-noise amplifier (LNA) and mixer stages in 3G/4G handset RF transceivers. IC Role / Device Role / Timing Role: Ultra-low-noise 3.3V bias rail with fast enable/disable sequencing synchronized to RF burst transmission. Use Value: 30µV(rms) noise floor prevents reciprocal mixing and maintains receiver sensitivity below –110dBm. |
Use Scenario: Supplies 3.3V to GPS baseband processor and crystal oscillator in wearable navigation devices. IC Role / Device Role / Timing Role: Precision voltage source with tight line/load regulation ensures stable clock generation and ADC reference integrity. Use Value: 1% initial accuracy and <0.2% load regulation prevent timing drift and position error accumulation over battery discharge cycle. |
| Bluetooth Audio Earbuds | Medical Pulse Oximeter |
|
Use Scenario: Powers Bluetooth radio IC and DAC in true-wireless stereo (TWS) earbuds with space-constrained PCB. IC Role / Device Role / Timing Role: Compact 2×2mm MLF™ LDO with integrated enable and bypass pin for dynamic noise suppression during audio playback. Use Value: 135mV dropout and 90µA quiescent current extend single-charge runtime beyond 6 hours at 150mA peak load. |
Use Scenario: Provides regulated 3.3V to optical sensor array and analog front-end in battery-operated fingertip pulse oximeters. IC Role / Device Role / Timing Role: Low-noise, thermally stable supply ensuring consistent LED drive current and photodiode signal integrity across body temperature range. Use Value: Thermal shutdown at 150°C and <2.0% output variation over –40°C to +125°C junction temperature prevent false saturation alarms during clinical use. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1700-3302E/TO | 300mA output, 170mV dropout @ 250mA, 40µV(rms) noise, SOT-23-5 package, no BYP pin. | Lacks dedicated noise-bypass terminal; requires higher-output-capacitance design to match PSRR at 10kHz. | Preferred when higher current headroom is needed and board layout allows larger output capacitor. |
| TCS2117-33IDBVR | 200mA output, 125mV dropout @ 150mA, 25µV(rms) noise, 5-pin SOT-23, no enable pin. | Fixed-enable operation only; unsuitable for systems requiring dynamic power gating or low-power sleep states. | Select when ultra-low dropout and lowest noise are critical, and enable control is handled externally. |
Compared with MCP1700-3302E/TO and TCS2117-33IDBVR, the MIC5252-3.3BML-TR uniquely combines 3.3V precision, dedicated BYP pin for tunable noise reduction, and TTL-compatible enable in a thermally efficient 2×2mm MLF™ package - making it optimal for space- and noise-constrained RF subsystems.
Availability
MIC5252-3.3BML-TR is available at Aetrix Electronics and suitable for cellular front-end power, portable GPS receivers, Bluetooth audio earbuds, medical pulse oximeters, and industrial handheld scanners requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for MIC5252-3.3BML-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 product line was designed specifically for ultra-low-noise, high-PSRR LDO regulation in battery-powered RF and portable consumer electronics - emphasizing ceramic-capacitor compatibility, minimal footprint, and fast transient response.
FAQ
What is the minimum input voltage required for MIC5252-3.3BML-TR to regulate at full 150mA load?
The MIC5252-3.3BML-TR requires a minimum input voltage of 3.435V to maintain regulation at 150mA, calculated from its 135mV typical dropout voltage plus nominal 3.3V output. Operation below 2.7V input is prohibited per absolute maximum ratings, and the device will not regulate if VIN falls below VOUT + dropout under load.
Can MIC5252-3.3BML-TR operate without the BYP capacitor, and what is the impact on noise performance?
Yes, MIC5252-3.3BML-TR functions without the BYP capacitor, but output noise increases to approximately 90µV(rms) - three times the 30µV(rms) achieved with a 0.01µF BYP capacitor. The BYP pin may be left open, but omitting the capacitor degrades PSRR above 1kHz and compromises RF-sensitive applications like VCO biasing.
Is MIC5252-3.3BML-TR compatible with 1.8V GPIO for enable control?
Yes, MIC5252-3.3BML-TR is compatible with 1.8V GPIO: its VIH threshold is specified at 1.6V minimum, and 1.8V logic high exceeds this requirement while remaining within the 0–VIN input voltage range. No level shifter is needed, and the enable input draws only 0.01–1µA.
What is the thermal performance difference between MIC5252-3.3BML-TR and the SOT-23-5 variant MIC5252-3.3BM5?
The MIC5252-3.3BML-TR (MLF™) has θJA = 90°C/W versus 235°C/W for the SOT-23-5 variant MIC5252-3.3BM5. At 150mA and 3.6V input, MIC5252-3.3BML-TR dissipates ~45mW and rises only ~4°C above ambient, whereas the SOT-23-5 version rises ~10.5°C - making the MLF™ essential for thermally dense layouts in handheld devices.
Does MIC5252-3.3BML-TR require a minimum load current to maintain regulation stability?
No, MIC5252-3.3BML-TR remains stable and in regulation with zero load current - a feature explicitly confirmed in the Applications Information section. This "no-load stability" supports CMOS RAM keep-alive circuits and always-on monitoring sensors where output current drops to nanoamps between wake cycles.
MIC5252-3.3BML-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):
- 3.3V
- 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)
MIC5252-3.3BML-TR FAQ
1.How can I place an order for MIC5252-3.3BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5252-3.3BML-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 MIC5252-3.3BML-TR reliable?
The price and inventory of MIC5252-3.3BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5252-3.3BML-TR is usually 5 days.
3.What payment methods are accepted for MIC5252-3.3BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5252-3.3BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5252-3.3BML-TR?
MIC5252-3.3BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5252-3.3BML-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 MIC5252-3.3BML-TR?
For technical support, including MIC5252-3.3BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5252-3.3BML-TR requirements.
6.How does Aetrix verify that MIC5252-3.3BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC5252-3.3BML-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 MIC5252-3.3BML-TR meets industry standards.
7.What is the process for return or replacement of MIC5252-3.3BML-TR?
All MIC5252-3.3BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5252-3.3BML-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 MIC5252-3.3BML-TR part is unused and in its original packaging.
Return procedure for MIC5252-3.3BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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