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Microchip Technology MIC2142BM5-TR
- Part No.:
- MIC2142BM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC2142BM5-TR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,372
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Product details
Overview
MIC2142BM5-TR from Micrel Inc. is a micropower synchronous boost switching regulator in SOT23-5 package, designed for low-input-voltage portable power conversion. It operates from 2.2V to 16V input, delivers up to 22V output, features 330kHz fixed-frequency operation, 85µA quiescent current, and supports adjustable output via external resistor divider - used in LCD bias supplies and white LED drivers.
For engineers reviewing the MIC2142BM5-TR datasheet, MIC2142BM5-TR pinout, MIC2142BM5-TR application, or MIC2142BM5-TR equivalent, key selection criteria include input voltage range (2.2–16V), output adjustability up to 22V, shutdown current (0.1µA), thermal performance (–40°C to +85°C ambient), and compatibility with compact 33µH inductors and Schottky diodes like MBR0530.
Technical Context
The MIC2142BM5-TR implements a fixed-duty-cycle (57%), constant-frequency (295–365kHz) hysteretic controller with internal N-channel MOSFET switch rated to 22V. Regulation is achieved by comparing feedback voltage against a 1.28V ±2% internal reference, with 18mV comparator hysteresis determining low-frequency ripple magnitude.
It supports three topologies - boost, SEPIC, and flyback - and uses gated oscillator architecture to minimize quiescent current. The EN pin enables logic-level shutdown (0.1µA typical), while SW node handles peak currents up to 400mA depending on input/output conditions and inductor selection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 16V - supports single-cell Li-ion (2.8–4.2V) and 3–4-cell alkaline/NiMH systems. |
| Output Voltage Range | Adjustable up to 22V - set via external resistor divider; limited by 22V SW node rating. |
| Switching Frequency | 295–365kHz (typ. 330kHz) - enables use of small surface-mount inductors (e.g., 33µH) and ceramic capacitors. |
| Quiescent Current | 85µA (typ.) - ensures minimal battery drain in always-on portable devices. |
| Shutdown Current | 0.1µA (typ.) - allows ultra-low-power system sleep modes without disconnecting power rails. |
| Feedback Reference | 1.28V ±2% - determines output accuracy; ripple scaling factor = VOUT / 1.28V × 18mV. |
| Operating Temperature | –40°C to +85°C ambient - validated for industrial and consumer handheld environments. |
Pinout & Package
SOT23-5 package (JEDEC MO-178AA), 1.6mm × 2.9mm footprint, 1.1mm height, thermal resistance θJA = 220°C/W on standard PCB.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Chip supply input | Accepts 2.2–16V; powers internal circuitry; must be bypassed with ≥10µF capacitor. |
| 2 - GND | Power and signal ground | Return path for internal MOSFET source and control logic; requires low-impedance PCB connection. |
| 3 - SW | Switch node | Drain of internal N-MOSFET; connects to inductor and diode anode; max 22V swing. |
| 4 - FB | Feedback input | Senses divided output voltage; bias current ≤30nA (adjustable version); sets regulation point. |
| 5 - EN | Enable/shutdown control | Active-high logic input; VIH ≥0.55×VCC, VIL ≤0.8V; pulls device into 0.1µA shutdown state. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 85µA quiescent current enables >1-year battery life in low-duty-cycle sensor nodes. |
| Hysteretic regulation | 18mV comparator hysteresis provides stable output without external compensation network. |
| Multi-topology support | Configurable as boost, SEPIC, or flyback - accommodates wide VIN/VOUT ratios and isolation needs. |
| Integrated power switch | On-chip N-MOSFET eliminates external gate driver; RDS(on) ~5Ω at VCC = 2.5V reduces conduction loss. |
| Low-noise shutdown | 0.1µA shutdown current prevents parasitic discharge in energy-harvesting or backup power systems. |
Applications
| LCD Bias Supply | White LED Driver |
|---|---|
Use Scenario: Powering segment or graphic LCD panels requiring +15V to +20V bias rails from 3.3V or single-cell Li-ion sources. IC Role / Device Role / Timing Role: Boost converter providing regulated high-voltage rail; operates in discontinuous conduction mode with 33µH inductor and BAT54 diode. Use Value: Enables compact, low-BOM-count LCD power solution with <1.5mm profile and <100µA standby draw. | Use Scenario: Driving 4-series white LEDs (≈12–16V forward drop) from 2.8–4.2V battery in portable medical or industrial displays. IC Role / Device Role / Timing Role: Constant-current-capable boost controller; configured with analog/PWM dimming interface and MBR0530 output diode. Use Value: Delivers 80mA LED current at >85% efficiency with no external current-sense resistor or op-amp. |
| 12V Flash Memory Supply | Local 3V to 5V Conversion |
Use Scenario: Generating clean 12V programming voltage for NOR/NAND flash memory in embedded controllers during firmware update. IC Role / Device Role / Timing Role: Low-noise, enable-controlled boost stage; uses 47µH inductor and ceramic output cap to limit ripple below 50mVpp. Use Value: Eliminates need for discrete charge-pump ICs or transformer-based solutions in space-constrained MCU modules. | Use Scenario: Up-converting 3.3V system rail to 5V for USB peripherals, sensors, or legacy I/O in battery-powered IoT edge nodes. IC Role / Device Role / Timing Role: Adjustable-output boost regulator; configured with 124kΩ/365kΩ divider for precise 5.0V ±2% output. Use Value: Achieves 5V at 60mA with <85µA quiescent overhead - critical for duty-cycled wake-up architectures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61022DRVR | Higher 2.5V min input, 5.5V max output, integrated soft-start, 2.2MHz switching. | Better suited for 3.3V→5V local conversion where size and EMI matter more than ultra-low IQ. | Select when board area is constrained and input never drops below 2.5V. |
| MAX17222ETA+ | Lower 0.7V min input, 500mA peak switch current, 1.2MHz, 2.4µA IQ in shutdown. | Ideal for sub-1V energy harvesting or coin-cell applications where MIC2142BM5-TR's 2.2V min is too high. | Choose when powering from weak sources (e.g., solar cells, thermoelectrics) or ultra-low-power sleep states. |
Compared with TPS61022DRVR and MAX17222ETA+, the MIC2142BM5-TR offers superior input voltage flexibility (2.2–16V), higher output voltage capability (up to 22V), and proven robustness in industrial temperature ranges - making it optimal for LCD bias and multi-cell alkaline/NiMH systems where wide VIN and high VOUT are essential.
Availability
MIC2142BM5-TR is available at Aetrix Electronics and suitable for LCD bias supplies, white LED drivers, 12V Flash memory supplies, and local 3V to 5V conversion requiring stable component supply across industrial temperature grades and long-lifecycle production programs.
Supply support for MIC2142BM5-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 analog and mixed-signal semiconductor company founded in 1978 and acquired by Microchip Technology in 2015; known for high-reliability power management and timing solutions.
The MIC2142 product line was engineered specifically for space-constrained, battery-operated portable electronics requiring efficient, low-quiescent-current DC-DC conversion with flexible topology support and extended input voltage range.
FAQ
What is the maximum output voltage achievable with the MIC2142BM5-TR?
The MIC2142BM5-TR supports output voltages up to 22V, limited by the 22V absolute maximum rating of its internal switch node (SW pin). This is confirmed in the Absolute Maximum Ratings table and Functional Description section of the datasheet. Exceeding 22V risks permanent damage to the internal MOSFET. For outputs above 22V, a flyback configuration is required - but the MIC2142BM5-TR itself remains rated for ≤22V at SW.
Can the MIC2142BM5-TR drive four white LEDs directly?
Yes, the MIC2142BM5-TR is explicitly characterized to deliver up to 80mA output current - sufficient to drive four series-connected white LEDs (typically requiring 15–20V and 15–25mA each). The datasheet's General Description states this capability, and Figure 3 shows a verified PWM-dimming white LED driver schematic using MIC2142BM5-TR with MBR0530 diode and 33µH inductor.
What is the feedback reference voltage of the MIC2142BM5-TR, and how does it affect output accuracy?
The MIC2142BM5-TR uses a 1.28V ±2% internal feedback reference voltage (VFB). Output accuracy depends on resistor divider tolerance and feedback bias current error. With a 124kΩ/365kΩ divider, typical output error is <±3% over temperature and line/load - as verified in the Electrical Characteristics table under "Feedback Voltage (VFB)" and "Load Regulation" parameters.
Does the MIC2142BM5-TR require external compensation components?
No, the MIC2142BM5-TR uses hysteretic control architecture with built-in 18mV comparator hysteresis, eliminating the need for external compensation networks such as type-II or type-III compensators. This simplifies design, reduces BOM count, and improves stability across varying loads - a key advantage highlighted in the Functional Description and Applications sections.
What package type and RoHS status does the MIC2142BM5-TR have?
The MIC2142BM5-TR is supplied in a Pb-free 5-pin SOT23 (MO-178AA) package, as specified in the Ordering Information table. The "-TR" suffix denotes tape-and-reel packaging, and the "M5" in the part number confirms the SOT23-5 variant. Micrel's documentation confirms full compliance with RoHS Directive 2002/95/EC for this part number.
MIC2142BM5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Function:
- Step-Up, Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Boost, Flyback, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.2V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.2V
- Voltage - Output (Max):
- 22V
- Current - Output:
- 200mA
- Frequency - Switching:
- 330kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
MIC2142BM5-TR FAQ
1.How can I place an order for MIC2142BM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2142BM5-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 MIC2142BM5-TR reliable?
The price and inventory of MIC2142BM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2142BM5-TR is usually 5 days.
3.What payment methods are accepted for MIC2142BM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2142BM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2142BM5-TR?
MIC2142BM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2142BM5-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 MIC2142BM5-TR?
For technical support, including MIC2142BM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2142BM5-TR requirements.
6.How does Aetrix verify that MIC2142BM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC2142BM5-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 MIC2142BM5-TR meets industry standards.
7.What is the process for return or replacement of MIC2142BM5-TR?
All MIC2142BM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2142BM5-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 MIC2142BM5-TR part is unused and in its original packaging.
Return procedure for MIC2142BM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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