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Microchip Technology MIC5211-3.3BM6-TR
- Part No.:
- MIC5211-3.3BM6-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
MIC5211-3.3BM6-TR.pdf
- Description:
- IC REG LINEAR 3.3V/3.3V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,124
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Product details
Overview
MIC5211-3.3BM6-TR from Micrel is a dual-output, 80mA low-dropout linear voltage regulator in SOT-23-6 package, delivering independent 3.3V outputs with 20mV typical dropout at light load, 225µA ground current at 20mA, and ±3% initial output accuracy. It serves as a compact, battery-optimized power solution for portable digital systems requiring dual regulated rails.
For engineers reviewing the MIC5211-3.3BM6-TR datasheet, MIC5211-3.3BM6-TR pinout, MIC5211-3.3BM6-TR application, or MIC5211-3.3BM6-TR equivalent, key selection criteria include dual independent enable control, ultra-low quiescent current, ceramic-capacitor stability (0.1µF per output), thermal shutdown per channel, and reversed-input-polarity protection-critical for handheld and SMPS post-regulation designs.
Technical Context
The MIC5211-3.3BM6-TR integrates two independent µCap LDO regulators sharing a common input (2.5V–16V) and ground, each with CMOS-compatible enable inputs (ENA/ENB) and separate 3.3V outputs (OUTA/OUTB). Its Super Beta PNP™ architecture enables sub-200mV dropout at 20mA while maintaining tight line (0.3%) and load (0.3%) regulation.
Each regulator features independent current limiting (~250mA), thermal shutdown, and zero off-mode current (<10µA shutdown IQ). The device is stable with 0.1µF ceramic output capacitors and exhibits <200ppm/°C temperature coefficient-enabling reliable operation across –40°C to +125°C ambient without external compensation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3V ±3% initial accuracy-ensures precise rail generation for 3.3V logic and I/O interfaces. |
| Dropout Voltage | 20mV typ. at 100µA; 450mV max. at 50mA-supports regulation down to VIN = 3.32V, ideal for single-cell Li-ion or coin-cell applications. |
| Ground Current | 225µA typ. at 20mA load-minimizes battery drain in always-on subsystems like RTC or memory backup. |
| Enable Threshold | VIH ≥ 2.0V, VIL ≤ 0.6V-compatible with 1.8V/3.3V/5V logic families and allows direct MCU GPIO control. |
| Thermal Shutdown | Per-channel activation at ~150°C junction-prevents damage during transient overloads or poor PCB thermal design. |
| Input Voltage Range | 2.5V to 16V-covers wide input sources including USB, multi-cell batteries, and SMPS outputs. |
| Output Capacitance | Stable with ≥0.1µF ceramic-eliminates need for large, costly tantalum or electrolytic capacitors. |
Pinout & Package
SOT-23-6 package (JEDEC MO-178AA), 1.6mm × 2.9mm footprint, 1.1mm height, with exposed pad not electrically connected. Pin 1 marked by dot; pin numbering counterclockwise from index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENA | Enable A input | CMOS-compatible control for Regulator A; high = active, open/low = shutdown; draws ≤1µA in shutdown. |
| 2 - GND | Power ground | Common return path for both regulators and enable inputs; must be low-impedance for stability. |
| 3 - ENB | Enable B input | Independent CMOS-compatible control for Regulator B; enables split-rail sequencing or standby isolation. |
| 4 - OUTB | Regulator B output | 3.3V regulated output; requires ≥0.1µF ceramic capacitor to GND for stability. |
| 5 - IN | Supply input | Shared input for both regulators; accepts 2.5V–16V; requires 0.1µF bypass if >10" wire length from source. |
| 6 - OUTA | Regulator A output | 3.3V regulated output; electrically isolated from OUTB-supports independent load switching and crosstalk <1mV. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | ENA and ENB allow asynchronous startup/shutdown of each 3.3V rail-enables power sequencing for FPGAs or processors with multiple supply domains. |
| Ultra-low quiescent current | 225µA at 20mA load per regulator-extends battery life in portable devices operating >80% time in partial-load conditions. |
| Reversed-input-polarity protection | Withstands –20V on IN pin-prevents damage during battery insertion error or reverse-connection in field-replaceable modules. |
| Zero off-mode current | <10µA total shutdown current-critical for long-term storage or "keep-alive" RAM retention in battery-backed systems. |
| 0.1µF ceramic capacitor stability | No ESR requirements or minimum capacitance beyond 0.1µF-reduces BOM cost and board area vs. traditional LDOs needing 10µF+ tantalum. |
Applications
| Cellular Telephones | Laptop Subsystems |
|---|---|
Use Scenario: Powering baseband processor I/O, RF transceiver bias, and display interface in GSM/UMTS handsets. IC Role / Device Role / Timing Role: Dual 3.3V LDO supplying independent, sequenced rails to avoid bus contention during boot. Use Value: Enables simultaneous power-up of analog and digital sections using single battery cell while minimizing standby current drain. | Use Scenario: Providing clean 3.3V for USB controller, card reader, and touchpad in ultraportable notebooks. IC Role / Device Role / Timing Role: Low-noise, fast-transient LDO replacing inefficient DC-DC converters in noise-sensitive peripheral domains. Use Value: Eliminates switching noise coupling into audio or sensor circuits, with <1mV crosstalk between outputs. |
| Barcode Scanners | SMPS Post-Regulator |
Use Scenario: Supplying laser diode driver, image sensor, and decode ASIC in handheld industrial scanners. IC Role / Device Role / Timing Role: Dual-output regulator delivering isolated 3.3V rails-one for logic, one for analog front-end-with independent enable for duty-cycled operation. Use Value: Reduces average system current by 40% via selective shutdown of sensor rail between scans. | Use Scenario: Tightening output tolerance and reducing ripple after buck converter in telecom or networking equipment. IC Role / Device Role / Timing Role: Precision LDO post-regulator improving voltage accuracy from ±5% (DC-DC) to ±3% and suppressing high-frequency switching noise. Use Value: Achieves <10mVpp output ripple at full load-meeting strict analog circuit requirements without additional filtering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333QDBVRQ1 | Single 3.3V output, 150mA rating, higher 120µA quiescent current, no independent enable per channel. | Requires two devices for dual-rail operation; lacks per-rail shutdown control and crosstalk isolation. | Select when only one 3.3V rail is needed and automotive AEC-Q100 qualification is required. |
| AP2112K-3.3TRG1 | Single 3.3V output, 600mA rating, 65µA quiescent current, fixed enable polarity, no reversed-polarity protection. | Higher current capacity but no dual output; unsuitable for split-rail sequencing or independent load management. | Select for high-current single-rail applications where board space permits discrete duplication. |
Compared with TPS76333QDBVRQ1 and AP2112K-3.3TRG1, the MIC5211-3.3BM6-TR uniquely delivers two matched 3.3V outputs with independent enable, ultra-low shutdown current, and reversed-input protection-all in a single SOT-23-6 package-making it optimal for space-constrained dual-rail battery-powered systems.
Availability
MIC5211-3.3BM6-TR is available at Aetrix Electronics and suitable for cellular telephones, barcode scanners, and SMPS post-regulator applications requiring stable component supply, consistent parametric performance, and long-term lifecycle support.
Supply support for MIC5211-3.3BM6-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 MIC5211 product line was designed for ultra-low-power, dual-rail portable electronics-emphasizing minimal quiescent current, ceramic-capacitor compatibility, and robust protection features in miniature packages.
FAQ
What is the maximum input voltage for the MIC5211-3.3BM6-TR?
The MIC5211-3.3BM6-TR supports an absolute maximum input voltage of +20V, but its operational input range is specified from 2.5V to 16V. Operation above 16V risks exceeding safe power dissipation limits and may trigger thermal shutdown. For reliable continuous operation, VIN should remain within the 2.5V–16V range per the datasheet's Operating Ratings.
Does the MIC5211-3.3BM6-TR require external capacitors for stability?
Yes-the MIC5211-3.3BM6-TR requires a minimum 0.1µF ceramic capacitor from each output (OUTA and OUTB) to GND for stability. An additional 0.1µF capacitor from IN to GND is recommended if input wiring exceeds 10 inches or when powered directly from a battery. No ESR constraints apply, enabling use of low-cost X5R/X7R MLCCs.
Can both outputs of the MIC5211-3.3BM6-TR be enabled simultaneously?
Yes-both outputs of the MIC5211-3.3BM6-TR can be enabled simultaneously by driving ENA and ENB to ≥2.0V. Each regulator operates independently, allowing concurrent or staggered activation. The device maintains <1mV crosstalk between outputs under dynamic load changes, preserving signal integrity in mixed-signal systems.
What is the thermal shutdown behavior of the MIC5211-3.3BM6-TR?
The MIC5211-3.3BM6-TR features per-channel thermal shutdown activated at approximately 150°C junction temperature. Although shutdown is implemented independently per regulator, both sections share the same die substrate-so excessive power dissipation in one section raises the local junction temperature and may affect the other. Total power dissipation must stay below 455mW at 25°C ambient to avoid triggering shutdown.
Is the MIC5211-3.3BM6-TR compatible with reversed battery connections?
Yes-the MIC5211-3.3BM6-TR includes built-in reversed-input-polarity protection and can withstand –20V applied to the IN pin without damage. This feature safeguards against accidental reverse battery installation in consumer handheld devices and industrial battery packs, eliminating the need for external series diodes or MOSFETs.
MIC5211-3.3BM6-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 3.3V, 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- 0.5V @ 50mA, 0.5V @ 50mA
- Current - Output:
- 80mA, 80mA
- Current - Quiescent (Iq):
- 450 µA
- Current - Supply (Max):
- 1.2 mA
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MIC5211-3.3BM6-TR FAQ
1.How can I place an order for MIC5211-3.3BM6-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5211-3.3BM6-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 MIC5211-3.3BM6-TR reliable?
The price and inventory of MIC5211-3.3BM6-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5211-3.3BM6-TR is usually 5 days.
3.What payment methods are accepted for MIC5211-3.3BM6-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5211-3.3BM6-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5211-3.3BM6-TR?
MIC5211-3.3BM6-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5211-3.3BM6-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 MIC5211-3.3BM6-TR?
For technical support, including MIC5211-3.3BM6-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5211-3.3BM6-TR requirements.
6.How does Aetrix verify that MIC5211-3.3BM6-TR is sourced from the original manufacturer or authorized distributors?
All MIC5211-3.3BM6-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 MIC5211-3.3BM6-TR meets industry standards.
7.What is the process for return or replacement of MIC5211-3.3BM6-TR?
All MIC5211-3.3BM6-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5211-3.3BM6-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 MIC5211-3.3BM6-TR part is unused and in its original packaging.
Return procedure for MIC5211-3.3BM6-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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