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Microchip Technology MIC5211-3.3/5.0BM6-TR
- Part No.:
- MIC5211-3.3/5.0BM6-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
MIC5211-3.3/5.0BM6-TR.pdf
- Description:
- IC REG LINEAR 3.3V/5V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:1,979
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Product details
Overview
MIC5211-3.3/5.0BM6-TR from Micrel is a dual-output, 80mA low-dropout linear voltage regulator in SOT-23-6 packaging, delivering independent 3.3V and 5.0V outputs with 20mV typical dropout at light loads, ±3% initial accuracy, and 225µA ground current at 20mA load. It enables compact power management in battery-powered handheld devices requiring mixed-rail supplies.
For engineers reviewing the MIC5211-3.3/5.0BM6-TR datasheet, MIC5211-3.3/5.0BM6-TR pinout, MIC5211-3.3/5.0BM6-TR application, or MIC5211-3.3/5.0BM6-TR equivalent, key selection criteria include dual independent enable control (ENA/ENB), ultra-low 0.1µF ceramic capacitor stability per output, reversed-input polarity protection, and thermal shutdown per regulator half - all within a 2.5V–16V input range.
Technical Context
The MIC5211-3.3/5.0BM6-TR integrates two independent µCap LDO regulators sharing a common IN and GND, each with CMOS-compatible enable inputs (ENA, ENB) and separate output pins (OUTA = 3.3V, OUTB = 5.0V). Its Super Beta PNP™ architecture delivers low quiescent current and near-zero off-mode current.
Each regulator features independent current limiting (140–250mA), thermal shutdown, and tight line/load regulation (≤0.3% typical). The device maintains stability with 0.1µF ceramic capacitors on both inputs and outputs, eliminating need for bulk or high-ESR types - critical for space-constrained portable designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 3.3V (OUTA) and 5.0V (OUTB), independently regulated, ±3% initial accuracy |
| Dropout Voltage | 20mV typical at 100µA load; ≤450mV at 20mA load - enables operation near battery end-of-life |
| Ground Current | 225µA at 20mA output per regulator - extends battery runtime in always-on subsystems |
| Input Voltage Range | 2.5V to 16V - supports single-cell Li-ion (3.0–4.2V), dual-cell (6–8.4V), and higher-voltage SMPS post-regulation |
| Output Capacitance | 0.1µF ceramic per output - eliminates need for large tantalum or electrolytic caps; reduces PCB area and cost |
| Enable Logic | CMOS-compatible ENA/ENB: VIH ≥ 2.0V (enable), VIL ≤ 0.6V (shutdown); draws ≤15µA per input |
| Protection Features | Reversed-input polarity protection, thermal shutdown per regulator half, and current limiting - enhances system robustness without external components |
Pinout & Package
SOT-23-6 package (JEDEC MO-178AA), 1.6mm × 2.9mm footprint, 1.1mm max height, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENA | Enable A input | CMOS-compatible control for 3.3V regulator; logic high ≥2.0V enables OUTA, open or low disables it |
| 2 - GND | Power ground | Common return path for both regulators and enable inputs; must be low-impedance for stability |
| 3 - ENB | Enable B input | CMOS-compatible control for 5.0V regulator; independent of ENA - allows staggered power-up or selective shutdown |
| 4 - OUTB | 5.0V output | Regulated 5.0V supply rail; requires 0.1µF ceramic capacitor to GND for stability |
| 5 - IN | Supply input | Common input for both regulators; accepts 2.5V–16V; 0.1µF bypass cap recommended if >10" wire length or battery source |
| 6 - OUTA | 3.3V output | Regulated 3.3V supply rail; stable with 0.1µF ceramic capacitor; isolated from OUTB crosstalk per characterization data |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | ENA and ENB allow asynchronous power sequencing - e.g., enable 3.3V rail first for logic, then 5.0V for peripherals |
| 0.1µF ceramic capacitor stability | Eliminates need for costly, temperature-sensitive tantalum or large electrolytic caps - reduces BOM count and board area |
| Reversed-input polarity protection | Prevents damage during battery insertion error or accidental reverse connection - no external diode required |
| Zero off-mode current | Draws ≤10µA total when both ENA and ENB are low - ideal for long-term storage or keep-alive circuits |
| Thermal shutdown per regulator half | Independent protection prevents single-rail overload from disabling both outputs - improves system fault tolerance |
Applications
| Cellular Telephones | Laptop/Notebook Computers |
|---|---|
Use Scenario: Powering baseband processor (3.3V) and USB interface circuitry (5.0V) from a shared Li-ion battery. IC Role / Device Role / Timing Role: Dual LDO providing isolated, low-noise, sequenced rails with minimal quiescent current draw during sleep modes. Use Value: Enables simultaneous 3.3V logic and 5.0V peripheral operation while maintaining <250µA total system standby current. | Use Scenario: Supplying memory I/O (3.3V) and legacy I/O or card reader (5.0V) from a 7.2V dual-cell battery pack. IC Role / Device Role / Timing Role: Mixed-voltage post-regulator replacing discrete LDOs - simplifies layout and reduces component count. Use Value: Delivers thermally safe operation up to 70°C ambient with full 50mA load on both rails using standard SOT-23-6 mounting. |
| Bar Code Scanners | SMPS Post-Regulator Modules |
Use Scenario: Powering laser diode driver (5.0V) and microcontroller core (3.3V) in compact handheld scanners. IC Role / Device Role / Timing Role: Compact dual LDO enabling rapid wake-up from deep sleep via independent ENA/ENB control. Use Value: Achieves <10µs enable-to-regulation time and <100mV load transient deviation - critical for responsive scanning. | Use Scenario: Tightening output voltage tolerance and reducing ripple after a switching DC-DC converter in industrial sensors. IC Role / Device Role / Timing Role: Low-noise linear post-regulator improving PSRR by >40dB at 100kHz vs. standalone SMPS. Use Value: Provides ±3% accuracy and <50µVrms output noise - meets precision analog front-end requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS76333/TPS76350 Dual | Separate ICs (two SOT-23-5 devices); no shared enable or package; higher IQ (130µA per channel) | Requires two footprints and routing; lacks integrated dual-enable sequencing | Choose when board space allows discrete placement and independent thermal management is preferred |
| MAX1725EEE+T | Single-output 3.3V LDO only; no 5.0V channel; 150mA rating; different package (SOT-23-5) | Cannot replace dual-rail function without adding second regulator | Use only as partial replacement for 3.3V rail where 5.0V is sourced elsewhere |
Compared with TPS76333/TPS76350 Dual and MAX1725EEE+T, the MIC5211-3.3/5.0BM6-TR uniquely integrates matched 3.3V/5.0V outputs with independent enables in one SOT-23-6, reducing PCB area by ~40% and enabling precise power sequencing - essential for space- and battery-constrained portable systems.
Availability
MIC5211-3.3/5.0BM6-TR is available at Aetrix Electronics and suitable for cellular telephones, bar code scanners, and SMPS post-regulator modules requiring stable component supply across extended temperature ranges (–40°C to +125°C).
Supply support for MIC5211-3.3/5.0BM6-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 space-constrained, battery-powered portable electronics requiring dual, low-quiescent, ceramic-capacitor-stable LDOs - targeting handheld computing, communications, and industrial sensing.
FAQ
What are the exact output voltages provided by the MIC5211-3.3/5.0BM6-TR?
The MIC5211-3.3/5.0BM6-TR delivers precisely 3.3V on OUTA and 5.0V on OUTB, each with ±3% initial accuracy over temperature and load. These values are factory-trimmed and specified in the ordering information table - no external feedback resistors are used, as both outputs are fixed internally.
Does the MIC5211-3.3/5.0BM6-TR require external capacitors for stability?
Yes, but minimally: the MIC5211-3.3/5.0BM6-TR requires only 0.1µF ceramic capacitors on each output (OUTA and OUTB) to GND for guaranteed 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.
Can the two regulators in the MIC5211-3.3/5.0BM6-TR be enabled independently?
Yes - ENA controls the 3.3V regulator (OUTA) and ENB controls the 5.0V regulator (OUTB) independently. Each input accepts CMOS logic levels (VIH ≥ 2.0V, VIL ≤ 0.6V), allowing flexible power sequencing, such as enabling the 3.3V rail before the 5.0V rail or shutting down one output while keeping the other active.
What is the maximum total power dissipation for the MIC5211-3.3/5.0BM6-TR at room temperature?
At 25°C ambient, the MIC5211-3.3/5.0BM6-TR has a junction-to-ambient thermal resistance (θJA) of 220°C/W and a maximum junction temperature of 125°C, yielding a maximum safe power dissipation of 455mW. This limit applies to the combined dissipation of both regulators - critical when calculating allowable output current at elevated input voltages.
Is reversed-input polarity protection built into the MIC5211-3.3/5.0BM6-TR?
Yes - the MIC5211-3.3/5.0BM6-TR includes internal reversed-input polarity protection, preventing damage if the input supply is accidentally connected with reverse polarity. This eliminates the need for an external series diode, preserving dropout performance and simplifying the power stage design.
MIC5211-3.3/5.0BM6-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, 5V
- 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
MIC5211-3.3/5.0BM6-TR FAQ
1.How can I place an order for MIC5211-3.3/5.0BM6-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5211-3.3/5.0BM6-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 MIC5211-3.3/5.0BM6-TR reliable?
The price and inventory of MIC5211-3.3/5.0BM6-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5211-3.3/5.0BM6-TR is usually 5 days.
3.What payment methods are accepted for MIC5211-3.3/5.0BM6-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5211-3.3/5.0BM6-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5211-3.3/5.0BM6-TR?
MIC5211-3.3/5.0BM6-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5211-3.3/5.0BM6-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 MIC5211-3.3/5.0BM6-TR?
For technical support, including MIC5211-3.3/5.0BM6-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5211-3.3/5.0BM6-TR requirements.
6.How does Aetrix verify that MIC5211-3.3/5.0BM6-TR is sourced from the original manufacturer or authorized distributors?
All MIC5211-3.3/5.0BM6-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 MIC5211-3.3/5.0BM6-TR meets industry standards.
7.What is the process for return or replacement of MIC5211-3.3/5.0BM6-TR?
All MIC5211-3.3/5.0BM6-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5211-3.3/5.0BM6-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 MIC5211-3.3/5.0BM6-TR part is unused and in its original packaging.
Return procedure for MIC5211-3.3/5.0BM6-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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