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Microchip Technology MIC5211-1.8/3.3BM6-TR
- Part No.:
- MIC5211-1.8/3.3BM6-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
MIC5211-1.8/3.3BM6-TR.pdf
- Description:
- IC REG LINEAR 1.8V/3.3V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,345
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Product details
Overview
MIC5211-1.8/3.3BM6-TR from Micrel is a dual-output, 80mA low-dropout linear regulator in SOT-23-6 package, delivering independent 1.8V and 3.3V outputs with 20mV typical dropout at light load, ±3% initial accuracy, and 225µA ground current at 20mA output. It enables power management in compact battery-powered systems such as handheld scanners and portable computing peripherals.
For engineers reviewing the MIC5211-1.8/3.3BM6-TR datasheet, MIC5211-1.8/3.3BM6-TR pinout, MIC5211-1.8/3.3BM6-TR application, or MIC5211-1.8/3.3BM6-TR equivalent, key selection criteria include dual-rail voltage independence, µCap ceramic capacitor compatibility (0.1µF per output), shutdown control per channel, thermal shutdown, and reversed-input polarity protection - all within a 2.5–16V input range.
Technical Context
The MIC5211-1.8/3.3BM6-TR integrates two independent PNP-based LDO regulators sharing one input and ground, each with dedicated CMOS-compatible enable inputs (ENA/ENB) and separate output pins (OUTA/OUTB). Its Super Beta PNP™ architecture minimizes ground current across load conditions while maintaining stability with ultra-low-ESR ceramic capacitors.
Each regulator features internal current limiting (140–250mA), thermal shutdown, and tight line/load regulation (≤0.5% variation). The device operates over –40°C to +125°C for the 3.3V rail and 0°C to +125°C for the 1.8V rail, with input voltage tolerance up to ±20V absolute maximum and enable inputs rated to 20V independent of VIN.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltages | 1.8V (Regulator A) and 3.3V (Regulator B), ±3% initial accuracy ensures reliable logic-level compliance for mixed-voltage SoC interfaces. |
| Dropout Voltage | 20mV typical at 100µA load; ≤450mV at 20mA - enables operation with minimal headroom, e.g., 3.3V output from 3.5V Li-ion cell. |
| Ground Current | 225µA at 20mA output per regulator - extends battery life in always-on keep-alive circuits. |
| Input Voltage Range | 2.5V to 16V - supports single-cell Li-ion (2.7–4.2V), dual-cell (5.4–8.4V), and industrial 12V rails without external pre-regulation. |
| Enable Thresholds | VIL ≤ 0.6V (shutdown), VIH ≥ 2.0V (enable) - compatible with 1.8V/3.3V GPIOs and allows direct connection to supply if unused. |
| Stability Capacitor | 0.1µF ceramic per output - eliminates need for large tantalum or electrolytic caps, reducing board area and cost. |
| Thermal Protection | Independent thermal shutdown per regulator section - prevents damage during overload or ambient temperature rise. |
Pinout & Package
SOT-23-6 package (JEDEC MO-178AA), 1.6mm × 2.9mm footprint, 1.1mm height, gull-wing leads, Pb-free compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENA | Enable/Shutdown Input A | CMOS-compatible control for Regulator A; high ≥2.0V enables 1.8V output, low ≤0.6V disables with <10µA quiescent draw. |
| 2 - GND | Common Ground Reference | Shared return path for both regulators and enable inputs; must be low-impedance to maintain regulation accuracy and thermal performance. |
| 3 - ENB | Enable/Shutdown Input B | Independent CMOS-compatible control for Regulator B; allows staggered power-up or selective rail disabling without affecting 1.8V domain. |
| 4 - OUTB | Regulator B Output | Delivers regulated 3.3V; requires 0.1µF ceramic capacitor to GND for stability; supports up to 80mA continuous load. |
| 5 - IN | Supply Input | Common input for both regulators; accepts 2.5–16V; reverse-polarity protected up to –20V; decoupling cap recommended if >10" wire length. |
| 6 - OUTA | Regulator A Output | Delivers regulated 1.8V; electrically isolated from OUTB; same stability and load requirements as OUTB. |
Key Features
| Feature | Design Value |
|---|---|
| Independent dual-rail control | Separate ENA/ENB inputs allow asynchronous power sequencing, dynamic rail disable, and fault isolation between 1.8V and 3.3V domains. |
| Ultra-low quiescent current | 225µA per regulator at 20mA load - critical for battery runtime in bar code scanners and handheld telemetry devices. |
| Reversed-input polarity protection | Withstands –20V on IN pin - prevents damage during battery insertion error or field-repair scenarios. |
| Zero off-mode current | <10µA total when both ENA and ENB are low - eliminates parasitic drain in storage or deep-sleep modes. |
| Tight temperature coefficient | 50–200 ppm/°C - maintains voltage accuracy across industrial temperature range without external trimming. |
Applications
| Cellular Baseband Power | Laptop Subsystem Supply |
|---|---|
Use Scenario: Powering RF transceiver baseband ICs and memory interfaces requiring simultaneous 1.8V I/O and 3.3V analog supply rails. IC Role / Device Role / Timing Role: Dual-LDO regulator providing isolated, low-noise, sequenced voltage domains with independent enable control. Use Value: Eliminates need for two discrete regulators and associated layout area; 20mV dropout preserves headroom for aging Li-ion cells. | Use Scenario: Supplying USB controller (3.3V) and low-power microcontroller core (1.8V) in notebook expansion modules. IC Role / Device Role / Timing Role: Compact dual-output LDO enabling space-constrained add-in cards with mixed-voltage logic families. Use Value: 0.1µF ceramic stability reduces BOM count and avoids tantalum capacitor aging issues in long-life embedded designs. |
| Barcode Scanner Logic Core | SMPS Post-Regulator |
Use Scenario: Powering image sensor interface (1.8V) and laser driver logic (3.3V) in handheld barcode readers. IC Role / Device Role / Timing Role: Dual-rail regulator with zero-off current supporting instant-on wake-from-sleep functionality. Use Value: 225µA ground current at 20mA extends alkaline battery life beyond 12 months in intermittent-use devices. | Use Scenario: Tightening output ripple and improving transient response after a buck converter in telecom power modules. IC Role / Device Role / Timing Role: Low-noise linear post-regulator cleaning switching noise for sensitive analog or clock circuitry. Use Value: Independent enable inputs allow dynamic turn-off of post-regulated rails during system standby, cutting leakage by >99%. |
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 |
|---|---|---|---|
| TPS7A20213DQNR | Single 2.1V output; no dual-rail capability; 300mA rating; lower IQ (6.5µA) | Requires two devices to replicate MIC5211-1.8/3.3BM6-TR's dual-voltage function; larger PCB area and BOM count | Select when only one rail is needed and ultra-low quiescent current is prioritized over integration. |
| MAX1725EEE+T | Dual 3.3V/3.3V outputs only; no mixed-voltage option; higher dropout (120mV @ 50mA); SOT-23-6 | Cannot provide 1.8V/3.3V split; suitable only for redundant or parallel 3.3V rails | Choose only for identical dual 3.3V applications where mixed voltages are unnecessary. |
Compared with TPS7A20213DQNR and MAX1725EEE+T, the MIC5211-1.8/3.3BM6-TR uniquely delivers factory-trimmed, independent 1.8V and 3.3V outputs in one SOT-23-6 package with µCap stability, making it optimal for space- and battery-constrained dual-rail systems where rail separation and low dropout are essential.
Availability
MIC5211-1.8/3.3BM6-TR is available at Aetrix Electronics and suitable for cellular telephony subsystems, handheld barcode scanners, and laptop peripheral modules requiring stable component supply with guaranteed long-term sourcing.
Supply support for MIC5211-1.8/3.3BM6-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 specifically for ultra-compact, battery-sensitive applications demanding dual independent LDOs with minimal external components and robust protection features.
FAQ
What are the operating temperature limits for MIC5211-1.8/3.3BM6-TR?
The MIC5211-1.8/3.3BM6-TR specifies a junction temperature range of –40°C to +125°C for the 3.3V regulator section and 0°C to +125°C for the 1.8V regulator section. This asymmetric rating reflects process optimization for the lower-voltage rail and must be accounted for in thermal design when both outputs operate simultaneously at elevated ambient temperatures.
Can MIC5211-1.8/3.3BM6-TR operate with input voltage below 2.5V?
No. The MIC5211-1.8/3.3BM6-TR has a minimum operating input voltage of 2.5V, as specified in the Absolute Maximum Ratings table. Attempting to operate below this threshold may result in loss of regulation, especially for the 1.8V output which requires sufficient headroom for its PNP pass element.
Does MIC5211-1.8/3.3BM6-TR require input capacitance?
Yes - a 0.1µF ceramic capacitor from IN to GND is recommended when the input source is more than 10 inches of wire away from the main filter capacitor or when powered directly by a battery. This mitigates high-frequency noise and improves transient response during enable/disable transitions.
How does reversed-input polarity protection work in MIC5211-1.8/3.3BM6-TR?
The MIC5211-1.8/3.3BM6-TR incorporates internal protection circuitry that blocks conduction when the IN pin is driven negative relative to GND, withstanding up to –20V continuously. This prevents damage during incorrect battery installation or field maintenance, without requiring external diodes or fuses.
Is MIC5211-1.8/3.3BM6-TR stable with zero load current?
Yes. Unlike many LDOs, the MIC5211-1.8/3.3BM6-TR remains stable and in regulation with no external load - only the internal voltage divider draws current. This makes it suitable for CMOS RAM keep-alive circuits and other ultra-low-power standby applications where load current drops to near-zero.
MIC5211-1.8/3.3BM6-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):
- 1.8V, 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:
- 0°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-6
MIC5211-1.8/3.3BM6-TR FAQ
1.How can I place an order for MIC5211-1.8/3.3BM6-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5211-1.8/3.3BM6-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 MIC5211-1.8/3.3BM6-TR reliable?
The price and inventory of MIC5211-1.8/3.3BM6-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5211-1.8/3.3BM6-TR is usually 5 days.
3.What payment methods are accepted for MIC5211-1.8/3.3BM6-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5211-1.8/3.3BM6-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5211-1.8/3.3BM6-TR?
MIC5211-1.8/3.3BM6-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5211-1.8/3.3BM6-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 MIC5211-1.8/3.3BM6-TR?
For technical support, including MIC5211-1.8/3.3BM6-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5211-1.8/3.3BM6-TR requirements.
6.How does Aetrix verify that MIC5211-1.8/3.3BM6-TR is sourced from the original manufacturer or authorized distributors?
All MIC5211-1.8/3.3BM6-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 MIC5211-1.8/3.3BM6-TR meets industry standards.
7.What is the process for return or replacement of MIC5211-1.8/3.3BM6-TR?
All MIC5211-1.8/3.3BM6-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5211-1.8/3.3BM6-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 MIC5211-1.8/3.3BM6-TR part is unused and in its original packaging.
Return procedure for MIC5211-1.8/3.3BM6-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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