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Microchip Technology MIC2142YM5-TR
- Part No.:
- MIC2142YM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC2142YM5-TR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,184
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Product details
Overview
MIC2142YM5-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 white LED biasing and LCD panel supplies.
For engineers reviewing the MIC2142YM5-TR datasheet, MIC2142YM5-TR pinout, MIC2142YM5-TR application, or MIC2142YM5-TR equivalent, key selection criteria include input voltage range (2.2–16V), output adjustability up to 22V, shutdown current (0.1µA), thermal performance in SOT23-5 (θJA = 220°C/W), and compatibility with low-ESR ceramic output capacitors.
Technical Context
The MIC2142YM5-TR implements a fixed-duty-cycle (57%), constant-frequency (295–365kHz) hysteretic control architecture with internal N-channel MOSFET switch. Regulation is achieved by gating the oscillator using feedback from an external resistive divider connected to the FB pin, referenced to a 1.28V ±2% internal bandgap.
It integrates shutdown logic (EN pin), supports boost/SEPIC/flyback topologies, and uses internal hysteresis (18mV at FB) to determine output ripple magnitude - scaled by VOUT/VREF (e.g., ~72mV for 5V output). Switch node (SW) is rated for 22V max, and internal MOSFET RDS(ON) is 5Ω at VCC = 2.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.2V to 16V - enables direct use with single Li-ion (2.8–4.2V) or 3–4-cell alkaline/NiMH sources. |
| Output Voltage Range | Adjustable up to 22V - set via external resistor divider on FB pin; supports LCD bias and flash memory rails. |
| Switching Frequency | 295–365kHz (typ. 330kHz) - allows compact 22–100µH inductors and ≤22µF ceramic output capacitors. |
| Quiescent Current | 85µA (typ.) - minimizes battery drain in always-on portable systems; critical for >1-year coin-cell lifetime. |
| Shutdown Current | 0.1µA (typ.) - ensures near-zero leakage during system sleep modes. |
| Feedback Reference | 1.28V ±2% - defines output accuracy; output error scales linearly with resistor tolerance and bias current (≤30nA). |
| Max Switch Voltage | 22V - limits practical boost output; higher voltages require flyback configuration per datasheet guidance. |
Pinout & Package
SOT23-5 package (JEDEC MO-178AA), 1.6mm × 2.9mm footprint, 1.1mm height, thermal pad not present. RoHS-compliant, Pb-free marking "SBAA".
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VCC | Chip supply input | Accepts 2.2–16V; powers internal circuitry and gate driver; bypass with ≥10µF ceramic capacitor. |
| 2 - GND | Power and signal ground | Common return for internal MOSFET source and control logic; requires low-impedance PCB connection. |
| 3 - SW | Switch node output | Drain of internal N-MOSFET; connects to inductor and catch diode; rated for 22V max, 100mA peak. |
| 4 - FB | Feedback input | Senses divided output voltage; 1.28V reference sets regulation point; bias current ≤30nA affects high-resistor-divider accuracy. |
| 5 - EN | Enable/shutdown control | Active-high logic input; VIH ≥0.55×VCC turns on regulator; VIL ≤0.8V shuts down to 0.1µA. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower operation | 85µA quiescent current enables multi-year battery life in low-duty-cycle IoT sensors and wearables. |
| Hysteretic regulation | 18mV comparator hysteresis provides predictable ripple envelope without external compensation network. |
| Integrated power switch | On-chip 5Ω (typ.) N-MOSFET eliminates external FET, reducing BOM count and layout area in space-constrained designs. |
| Topology flexibility | Supports boost, SEPIC, and flyback configurations - allows single IC to serve multiple voltage conversion needs across product variants. |
| Wide ambient range | –40°C to +85°C operation validated - suitable for industrial handhelds and automotive infotainment displays. |
Applications
| LCD Bias Supply | White LED Driver |
|---|---|
Use Scenario: Powering segmented or monochrome LCD panels in portable medical devices and industrial HMIs requiring stable 15–20V bias rails. IC Role / Device Role / Timing Role: Boost converter generating regulated high-voltage bias from 3.3V or 5V system rail. Use Value: Delivers 0.5–2mA at 20V with <1% load regulation and minimal board area - replaces discrete charge pumps. | Use Scenario: Driving 4-series white LEDs (12–16V forward) in backlight modules for handheld scanners and barcode readers. IC Role / Device Role / Timing Role: Constant-current-capable boost controller with analog/PWM dimming interface support. Use Value: Provides 80mA output at >85% efficiency using 33µH inductor and MBR0530 diode - avoids thermal derating in sealed enclosures. |
| 12V Flash Memory Supply | Local 3V-to-5V Conversion |
Use Scenario: Generating clean 12V programming voltage for NOR/NAND flash in embedded controllers during firmware update cycles. IC Role / Device Role / Timing Role: Low-quiescent-current boost stage activated only during write/erase operations. Use Value: Achieves 12V @15mA with <50mVpp ripple using 47µH inductor - meets JEDEC VIO timing margins without LDO post-regulation. | Use Scenario: Up-converting 3.3V system rail to 5V for USB peripherals or legacy I/O in battery-powered edge nodes. IC Role / Device Role / Timing Role: Efficient local DC-DC step-up replacing inefficient linear regulators. Use Value: Delivers 60mA at 5V with 85% efficiency and 85µA no-load draw - extends runtime vs. 3.3V-to-5V LDO solutions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DBVR | Higher 500kHz switching frequency; 20µA IQ; fixed 5V/3.3V options only; no adjustable version. | Better suited for ultra-low-power sensor nodes needing fixed 5V, but lacks MIC2142YM5-TR's 22V adjustability. | Select when fixed-output simplicity and lower IQ outweigh need for wide output range. |
| MAX1706ESA+ | 2.5–5.5V input range only; 1.25V reference; 1.2MHz operation; integrated soft-start. | Restricted to low-input systems (e.g., 3.3V rails); cannot replace MIC2142YM5-TR in 12V-input or 22V-output roles. | Choose only for space-constrained 3.3V-to-5V/12V conversions where input never drops below 2.5V. |
Compared with TPS61040DBVR and MAX1706ESA+, the MIC2142YM5-TR uniquely supports 2.2–16V input and 22V adjustable output in the same SOT23-5 footprint - making it the sole option for high-ratio boost from single-cell Li-ion or multi-cell alkaline sources in legacy portable designs.
Availability
MIC2142YM5-TR is available at Aetrix Electronics and suitable for LCD bias supply, white LED driver, and 12V flash memory supply applications requiring stable component supply across long-lifecycle industrial programs.
Supply support for MIC2142YM5-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, acquired by Microchip Technology in 2015. Known for high-reliability power management and timing solutions.
The MIC2142YM5-TR belongs to Micrel's micropower DC-DC converter family, engineered specifically for battery-operated portable equipment demanding ultra-low quiescent current and wide input voltage tolerance.
FAQ
What is the maximum output voltage achievable with the MIC2142YM5-TR?
The MIC2142YM5-TR supports adjustable output voltages up to 22V in standard boost configuration, limited by its internal switch voltage rating. Exceeding 22V requires flyback topology per datasheet Section 6. The FB pin reference is 1.28V ±2%, so output accuracy depends on resistor divider tolerance and bias current error - typical design uses 1% resistors for ≤1.5% total error. The MIC2142YM5-TR does not support programmable voltage via digital interface.
Can the MIC2142YM5-TR drive white LEDs directly without external current regulation?
No, the MIC2142YM5-TR is a voltage-mode boost controller, not a constant-current LED driver. To drive white LEDs, it must be paired with external current-setting circuitry - such as a series sense resistor with op-amp feedback or PWM-controlled MOSFET switch. Application Figures 3–5 in the datasheet show validated analog/PWM dimming implementations using the MIC2142YM5-TR as the voltage source. Its 80mA capability suits 4-series LED strings at ~3.2V each.
What is the recommended inductor value for a 5V output from 3.3V input using the MIC2142YM5-TR?
For 3.3V input to 5V output at ≤60mA, the datasheet recommends 27–33µH (Table 5). A 33µH, 220mA saturation-current shielded inductor (e.g., Sumida CR32 series) is optimal - balancing peak current (<400mA), output ripple (<50mVpp), and board area. Lower values increase ripple and stress the internal switch; higher values reduce ripple but extend transient response. The MIC2142YM5-TR's 330kHz frequency makes 33µH ideal for ceramic capacitor compatibility.
Does the MIC2142YM5-TR require an external Schottky diode, and what are acceptable alternatives?
Yes, the MIC2142YM5-TR requires an external catch diode. Recommended types include BAT54 (≤300mA peak, low leakage) for low-current LCD bias, or MBR0530 (SOD-123, 500mA peak) for LED drivers. Diode selection must meet: VF < 0.5V at peak inductor current, IR < 1µA at max output voltage, and trr < 10ns. The MIC2142YM5-TR's SW pin voltage swing and 330kHz frequency make fast recovery essential - 1N4148 is acceptable only for <10mA loads due to higher VF and leakage.
How does the MIC2142YM5-TR behave during startup and under short-circuit conditions?
The MIC2142YM5-TR has no dedicated short-circuit protection; under overload, it enters pulse-skipping mode with reduced duty cycle, causing output voltage droop and elevated ripple. Startup is monotonic with no inrush current limiting - input capacitor must handle full peak inductor current. Thermal shutdown activates above TJ = +125°C (θJA = 220°C/W), recovering after cooldown. The MIC2142YM5-TR relies on external current-limiting (e.g., series resistor or foldback circuit) for robust fault handling.
MIC2142YM5-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
MIC2142YM5-TR FAQ
1.How can I place an order for MIC2142YM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2142YM5-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 MIC2142YM5-TR reliable?
The price and inventory of MIC2142YM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2142YM5-TR is usually 5 days.
3.What payment methods are accepted for MIC2142YM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2142YM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2142YM5-TR?
MIC2142YM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2142YM5-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 MIC2142YM5-TR?
For technical support, including MIC2142YM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2142YM5-TR requirements.
6.How does Aetrix verify that MIC2142YM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC2142YM5-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 MIC2142YM5-TR meets industry standards.
7.What is the process for return or replacement of MIC2142YM5-TR?
All MIC2142YM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2142YM5-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 MIC2142YM5-TR part is unused and in its original packaging.
Return procedure for MIC2142YM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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