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Microchip Technology MIC5211-1.8BM6-TR
- Part No.:
- MIC5211-1.8BM6-TR
- Manufacturer:
- Microchip Technology
- Package:
- SOT-23-6
- Datasheet:
-
MIC5211-1.8BM6-TR.pdf
- Description:
- IC REG LINEAR 1.8V/1.8V SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:4,325
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Product details
Overview
MIC5211-1.8BM6-TR from Micrel is a dual-output, 80mA low-dropout linear voltage regulator in SOT-23-6 package, delivering independent 1.8V outputs per channel 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 MIC5211-1.8BM6-TR datasheet, MIC5211-1.8BM6-TR pinout, MIC5211-1.8BM6-TR application, or MIC5211-1.8BM6-TR equivalent, key selection criteria include dual-channel enable control, ultra-low quiescent current, ceramic-capacitor stability (0.1µF min), thermal shutdown independence, and reversed-input polarity protection-critical for handheld and SMPS post-regulation designs.
Technical Context
The MIC5211-1.8BM6-TR integrates two independent µCap LDO regulators sharing a common input but featuring separate CMOS-compatible enable inputs (ENA/ENB) and dedicated output pins (OUTA/OUTB). Each regulator uses Micrel's Super Beta PNP™ architecture to achieve low dropout and minimal ground current across load range.
It operates from 2.5V to 16V input, supports zero-load stability, and includes per-channel current limiting (140–250mA), thermal shutdown, and reverse-battery protection. The device is rated for 0°C to +125°C ambient operation and exhibits 50–200ppm/°C output voltage temperature coefficient.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 1.8V per channel, ±3% initial accuracy ensures reliable logic-level supply for 1.8V microcontrollers and memory interfaces. |
| Dropout Voltage | 20mV typical at 100µA load; enables regulation down to VIN = 1.82V, critical for single-cell Li-ion or NiMH battery operation. |
| Ground Current | 225µA at 20mA output per regulator; minimizes standby power loss in always-on subsystems like RTC or sensor bias rails. |
| Input Voltage Range | 2.5V to 16V; accommodates wide input sources including unregulated adapters, multi-cell batteries, and SMPS pre-regulated buses. |
| Enable Threshold | VIL ≤ 0.6V (shutdown), VIH ≥ 2.0V (enable); compatible with 1.8V/3.3V/5V logic families without level-shifting. |
| Output Capacitance | Stable with ≥0.1µF ceramic capacitor per output; eliminates need for large, costly tantalum or electrolytic caps. |
| Thermal Shutdown | Per-channel activation with shared substrate; prevents damage during overload while allowing one channel to remain active if thermally isolated. |
Pinout & Package
SOT-23-6 package: 2.9mm × 1.6mm × 1.1mm body, gull-wing leads, JEDEC MO-178AC compliant, thermal resistance θJA = 220°C/W on standard PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ENA | Enable A input | CMOS-compatible control for Regulator A; high = active, low/open = shutdown with <10µA leakage. |
| 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 true dual-rail sequencing or fault isolation. |
| 4 - OUTB | Regulator B output | 1.8V regulated output capable of sourcing up to 80mA; requires local 0.1µF ceramic decoupling. |
| 5 - IN | Supply input | Shared input for both regulators; accepts 2.5V–16V; requires 0.1µF bypass if >10" wire length or battery source. |
| 6 - OUTA | Regulator A output | 1.8V regulated output capable of sourcing up to 80mA; electrically isolated from OUTB except via shared IN/GND. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent enable control | Enables flexible power sequencing, rail-specific fault recovery, and dynamic power gating without external logic. |
| Ultra-low ground current | 225µA per regulator at 20mA load extends battery runtime in portable devices where sleep-mode current dominates lifetime. |
| Reversed-input polarity protection | Withstands –20V on IN pin without damage-essential for battery-reversal scenarios in consumer handhelds. |
| Zero off-mode current | ≤10µA total shutdown current (both channels) eliminates parasitic drain in storage or long-term backup modes. |
| Thermal shutdown independence | Each regulator shuts down individually under overtemperature, preserving functionality of the unaffected channel. |
Applications
| Cellular Telephones | Laptop Subsystems |
|---|---|
Use Scenario: Powering baseband processor I/O banks and RF transceiver bias circuits in dual-voltage GSM/UMTS handsets. IC Role / Device Role / Timing Role: Dual 1.8V LDO providing clean, sequenced supply rails with independent enable for modem and radio power domains. Use Value: Enables simultaneous 1.8V rail generation with <20mV dropout and <0.1µF ceramic stability-reducing BOM count and PCB area vs. discrete regulators. | Use Scenario: Supplying 1.8V core voltage to embedded controllers and secure elements in notebook keyboard or touchpad modules. IC Role / Device Role / Timing Role: Low-quiescent dual LDO delivering always-on 1.8V power with zero-off current for wake-on-keyboard functionality. Use Value: 225µA ground current at 20mA load and <10µA shutdown current extend battery life in suspend states without compromising responsiveness. |
| Barcode Scanners | SMPS Post-Regulator |
Use Scenario: Regulating 1.8V for CMOS image sensors and laser driver logic in handheld industrial scanners. IC Role / Device Role / Timing Role: Dual-output LDO supplying isolated 1.8V rails for analog sensor front-end and digital decode ASIC. Use Value: Independent ENA/ENB allows synchronous wake-up of sensor and processor, while 0.1µF ceramic compatibility simplifies layout in space-constrained scanner housings. | Use Scenario: Tightening output voltage tolerance and reducing ripple after a switching DC-DC converter in telecom line cards. IC Role / Device Role / Timing Role: Dual 1.8V LDO acting as precision post-regulator for noise-sensitive FPGA I/O banks and SerDes power domains. Use Value: ±3% initial accuracy and <0.3% load regulation ensure stable 1.8V supply despite upstream SMPS variation, improving signal integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP1826S-1802E/DB | Single 1.8V output (not dual), 300mA rating, higher IQ (120µA typ), same SOT-23-5 package. | Lacks independent dual enable and second 1.8V rail; suitable only when single-rail 1.8V suffices. | Select if higher current per rail is needed and dual-rail independence is unnecessary. |
| TPS76318QDBVRQ1 | Automotive-grade single 1.8V LDO, 150mA, 120µA IQ, SOT-23-5, AEC-Q100 qualified. | No dual output or independent enable; designed for automotive environments with extended temp and reliability requirements. | Choose for automotive applications requiring qualification; not a functional replacement for dual-rail use cases. |
Compared with MIC5211-1.8BM6-TR, MCP1826S-1802E/DB offers higher current but no dual-rail capability, while TPS76318QDBVRQ1 provides automotive qualification at the cost of single-rail operation-neither matches the MIC5211-1.8BM6-TR's combination of dual 1.8V outputs, independent enable, and ultra-low IQ in SOT-23-6.
Availability
MIC5211-1.8BM6-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 MIC5211-1.8BM6-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 delivers dual µCap LDO regulators optimized for battery-powered portable electronics, emphasizing ultra-low quiescent current, ceramic-capacitor stability, and compact dual-rail integration.
FAQ
What is the maximum input voltage for the MIC5211-1.8BM6-TR?
The MIC5211-1.8BM6-TR supports an absolute maximum input voltage of +20V, but its specified operating input range is 2.5V to 16V. Operation above 16V risks exceeding safe power dissipation limits and may trigger thermal shutdown even at moderate loads. For reliable continuous operation, VIN should remain within 2.5V–16V per the datasheet's Operating Ratings.
Does the MIC5211-1.8BM6-TR require external capacitors for stability?
Yes, the MIC5211-1.8BM6-TR requires a minimum 0.1µF ceramic capacitor on each output (OUTA and OUTB) for guaranteed stability. An additional 0.1µF capacitor from IN to GND is recommended if the input trace exceeds 10 inches or when powered directly from a battery. These values are validated in the datasheet and enable full stability without ESR constraints.
Can both regulators of the MIC5211-1.8BM6-TR be enabled simultaneously?
Yes, both regulators in the MIC5211-1.8BM6-TR can be enabled simultaneously by applying ≥2.0V to both ENA and ENB pins. They operate independently-each with its own load, ground current, and thermal behavior-while sharing the IN and GND connections. This allows concurrent 1.8V rail generation with coordinated or independent control.
What is the shutdown current of the MIC5211-1.8BM6-TR?
The MIC5211-1.8BM6-TR draws ≤10µA total shutdown current when both ENA and ENB are held ≤0.4V. This value includes leakage from both enable inputs and internal circuitry. The datasheet specifies 0.01µA to 10µA across temperature, confirming near-zero parasitic drain essential for long-term battery backup applications.
Is the MIC5211-1.8BM6-TR compatible with ceramic output capacitors?
Yes, the MIC5211-1.8BM6-TR is specifically optimized for ceramic output capacitors as low as 0.1µF. Its µCap architecture eliminates ESR dependency, enabling stable operation with small, low-cost X5R/X7R MLCCs-unlike traditional LDOs that require higher-ESR tantalum or aluminum electrolytics. This reduces board area and improves transient response.
MIC5211-1.8BM6-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, 1.8V
- 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
MIC5211-1.8BM6-TR FAQ
1.How can I place an order for MIC5211-1.8BM6-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC5211-1.8BM6-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 MIC5211-1.8BM6-TR reliable?
The price and inventory of MIC5211-1.8BM6-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC5211-1.8BM6-TR is usually 5 days.
3.What payment methods are accepted for MIC5211-1.8BM6-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC5211-1.8BM6-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC5211-1.8BM6-TR?
MIC5211-1.8BM6-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC5211-1.8BM6-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 MIC5211-1.8BM6-TR?
For technical support, including MIC5211-1.8BM6-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC5211-1.8BM6-TR requirements.
6.How does Aetrix verify that MIC5211-1.8BM6-TR is sourced from the original manufacturer or authorized distributors?
All MIC5211-1.8BM6-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 MIC5211-1.8BM6-TR meets industry standards.
7.What is the process for return or replacement of MIC5211-1.8BM6-TR?
All MIC5211-1.8BM6-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC5211-1.8BM6-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 MIC5211-1.8BM6-TR part is unused and in its original packaging.
Return procedure for MIC5211-1.8BM6-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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