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Microchip Technology MIC2141BM5-TR
- Part No.:
- MIC2141BM5-TR
- Manufacturer:
- Microchip Technology
- Package:
- SC-74A, SOT-753
- Datasheet:
-
MIC2141BM5-TR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:4,340
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Product details
Overview
MIC2141BM5-TR from Micrel Inc. is a micropower boost switching regulator IC designed for space-constrained portable systems. It operates from 2.5V–14V input, delivers dynamically adjustable 4.8V–22V output via VC pin control (gain = 6), and uses a fixed 330kHz gated-oscillator with 18% duty cycle. Its 70µA quiescent current and >85% efficiency support LCD bias and CCD camera supply applications.
For engineers reviewing the MIC2141BM5-TR datasheet, MIC2141BM5-TR pinout, MIC2141BM5-TR application, or MIC2141BM5-TR equivalent, key selection criteria include its SOT-23-5 package, 22V switch-node rating, 1.24V internal bandgap reference, <2µA shutdown current, and VC-controlled proportional output regulation - all critical for low-power, battery-operated analog biasing circuits.
Technical Context
The MIC2141BM5-TR employs a hysteretic comparator-based regulation scheme where the VC input voltage directly sets the output via a fixed 6× gain relationship. Output voltage is compared to VC through an internal resistive divider, and oscillator gating is controlled by 10mV comparator hysteresis - resulting in ±30mV low-frequency output ripple.
Its constant-frequency, fixed-duty-cycle architecture eliminates external timing components and enables operation with only three external parts: inductor, diode, and output capacitor. The internal N-channel MOSFET switch supports up to 22V drain-source voltage and features on-resistance of 4Ω at VIN = 3.6V and 2.5Ω at VIN = 12V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.5V to 14V - supports single Li-ion (2.7–4.2V), 3–4 NiMH cells, or regulated 5V/12V rails. |
| Output Voltage Range | 4.8V to 22V - programmable via 0.8V–3.6V VC input with 6× gain; max limited by 22V SW node rating. |
| Switching Frequency | 330kHz (300–360kHz) - fixed frequency enables predictable EMI filtering and compact magnetics. |
| Quiescent Current | 70µA - enables multi-week battery life in always-on bias supplies for LCDs or image sensors. |
| Shutdown Current | <2µA - allows full system power-down without leakage path through regulator. |
| Control Gain (VOUT/VC) | 6 - linear mapping simplifies DAC-based closed-loop voltage control without external op-amps. |
| Bandgap Reference | 1.24V - stable internal reference used in feedback path for consistent VC-to-VOUT scaling. |
Pinout & Package
Package: 5-pin SOT-23 (JEDEC MO-178AA), 2.9mm × 1.6mm × 1.1mm, surface-mount, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - IN | Power Input | Supplies internal circuitry; accepts 2.5V–14V; must exceed VC + 200mV for valid regulation. |
| 2 - GND | Ground Reference | Common return for internal logic, comparator, and MOSFET source; requires low-impedance PCB connection. |
| 3 - SW | Switch Node | Drain of internal N-MOSFET; connects to inductor and flyback diode anode; rated to 22V max. |
| 4 - FB | Feedback Sense | Internally connected to output divider; compared to VC; open or floating causes VOUT ≈ VIN – 0.5V. |
| 5 - VC | Voltage Control Input | Analog programming pin; 0.8V–3.6V input yields 4.8V–22V output; gain = 6; common-mode range requires VC ≤ VIN – 200mV. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower Operation | 70µA quiescent current enables >1-year runtime on coin-cell batteries in standby bias applications. |
| Dynamic Output Control | VC pin provides direct, linear 6× gain adjustment - eliminates need for external DAC buffer or resistor networks. |
| Minimal External Components | Only inductor, Schottky diode, and output capacitor required - reduces BOM count and PCB area in portable designs. |
| Hysteretic Regulation | 10mV comparator hysteresis ensures stable gating without compensation network - simplifies layout and improves transient response. |
| High Switch Voltage Rating | 22V SW node supports up to 20V output in standard boost topology - suitable for high-voltage LCD segment drivers. |
Applications
| LCD Bias Supply | CCD Digital Camera Supply |
|---|---|
Use Scenario: Generating adjustable positive bias (e.g., +12V to +20V) for TFT-LCD gate drivers and source drivers in handheld displays. IC Role / Device Role / Timing Role: Primary DC-DC boost controller; regulates high-voltage rail using DAC-driven VC input for brightness or contrast tuning. Use Value: Enables precise, low-noise bias voltage control with <2µA shutdown leakage - extends battery life while maintaining display uniformity. |
Use Scenario: Providing clean, stable high-voltage supply (e.g., +15V) for CCD sensor analog front-end and vertical/horizontal driver stages. IC Role / Device Role / Timing Role: Low-quiescent-current boost converter; delivers regulated output under varying load conditions during image capture bursts. Use Value: Delivers >85% efficiency at 1–10mA loads and maintains ±30mV output ripple - preserves signal integrity in low-light imaging. |
| Portable Medical Sensor Bias | Low-Power OLED Display Supply |
Use Scenario: Powering high-impedance analog sensor bias rails (e.g., +5V to +12V) in battery-powered glucose meters or pulse oximeters. IC Role / Device Role / Timing Role: Micropower voltage translator; converts single-cell Li-ion voltage into stable, programmable analog supply independent of battery discharge curve. Use Value: 70µA IQ and 2.5V minimum VIN allow operation down to 20% battery capacity - ensures clinical accuracy across full charge cycle. |
Use Scenario: Supplying variable anode voltage (e.g., +8V to +18V) for OLED panel brightness control in smartwatches and wearables. IC Role / Device Role / Timing Role: Digitally programmable boost regulator; VC pin accepts PWM-filtered DAC output to modulate OLED luminance without PWM dimming artifacts. Use Value: Linear VC-to-VOUT mapping enables smooth, flicker-free brightness scaling - improves user experience while minimizing EMI. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX17222ETA+ | 300kHz fixed-frequency, 1.8V–5.5V input, 2.5V–5.5V output; 1.4µA shutdown, but no VC analog control pin. | Designed for ultra-low-input, fixed-output micro-power apps (e.g., BLE sensors); lacks dynamic voltage scaling capability. | Select when minimal IQ (<2µA) and sub-2V start-up are critical, and output is fixed or digitally trimmed via I²C. |
| TPS61099YFFR | 600kHz, 0.7V–5.5V input, up to 5.5V output; 300nA shutdown, integrated 1.2A switch; no VC pin or >6V output capability. | Optimized for single-cell to 3.3V/5V step-up in IoT endpoints; cannot generate >5.5V bias rails required for LCD/OLED. | Choose for ultra-low-VIN applications needing higher output current (>100mA), but not for >6V analog bias generation. |
Compared with MAX17222ETA+ and TPS61099YFFR, the MIC2141BM5-TR uniquely supports analog-programmable high-voltage outputs (up to 22V) with micropower operation - making it irreplaceable for LCD bias, CCD supply, and other precision analog rail generation tasks where VC-based linear control is mandatory.
Availability
MIC2141BM5-TR is available at Aetrix Electronics and suitable for LCD bias supply, CCD digital camera supply, portable medical sensor bias, and low-power OLED display supply requiring stable component supply and long-term manufacturability.
Supply support for MIC2141BM5-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 power management semiconductor company founded in 1978 and acquired by Microchip Technology in 2015. Known for high-reliability, low-power interface and power ICs.
The MIC2141BM5-TR belongs to Micrel's micropower DC-DC controller family, engineered specifically for battery-powered portable electronics requiring dynamically adjustable high-voltage bias rails with minimal quiescent consumption.
FAQ
What is the maximum output voltage achievable with the MIC2141BM5-TR?
The MIC2141BM5-TR supports a maximum output voltage of 22V, constrained by its internal MOSFET switch node (SW) absolute maximum rating of 22V. This limit applies in standard boost configuration; higher voltages require flyback topology. Exceeding 22V risks device failure, and VC input must remain ≤ VIN – 200mV to ensure proper regulation - for example, achieving 20V output requires VIN ≥ 3.5V.
How does the VC pin control the output voltage in the MIC2141BM5-TR?
The VC pin on the MIC2141BM5-TR serves as an analog programming input with a fixed gain of 6: VOUT = 6 × VC. Applying 0.8V–3.6V to VC yields 4.8V–22V output. The internal comparator compares a divided version of VOUT to VC; hysteresis (10mV) introduces ±30mV output ripple. If VC is left unconnected, VOUT defaults to VIN – 0.5V - a fallback mode useful for simple fixed-rail applications.
What external components are required to operate the MIC2141BM5-TR?
The MIC2141BM5-TR requires only three external components: a power inductor (e.g., 10–56µH), a Schottky diode (e.g., BAT54 or MBR0530), and an output capacitor (e.g., 10µF tantalum or ceramic). No compensation network, timing capacitor, or external MOSFET is needed. A 0.1µF bypass capacitor on the IN pin is recommended for stability, and optional resistors (R1/R2) may be added for gain boosting beyond 6× in specialized configurations.
What is the quiescent current and shutdown current of the MIC2141BM5-TR?
The MIC2141BM5-TR draws 70µA quiescent current during normal operation (switch off, VIN = 3.6V) and less than 2µA shutdown current when disabled. These ultra-low currents enable multi-month battery life in always-on bias applications such as LCD segment drivers or CCD sensor supplies. Shutdown is activated by pulling VC below 0.5V or disconnecting VC while maintaining valid VIN.
Is the MIC2141BM5-TR pin-compatible with other Micrel boost controllers like the MIC2142?
No, the MIC2141BM5-TR is not pin-compatible with the MIC2142. While both are in SOT-23-5 packages, their pin functions differ: MIC2141 uses Pin 5 as VC (voltage control input), whereas MIC2142 uses Pin 5 as FB (feedback input) and includes an internal 1.24V reference. Swapping them would cause incorrect regulation or failure. The MIC2142 is intended for fixed-output or resistor-programmed applications, while MIC2141BM5-TR is strictly for analog VC-controlled outputs.
MIC2141BM5-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):
- 2.5V
- Voltage - Input (Max):
- 14V
- Voltage - Output (Min/Fixed):
- 4.8V
- Voltage - Output (Max):
- 22V
- Current - Output:
- 10mA
- 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
MIC2141BM5-TR FAQ
1.How can I place an order for MIC2141BM5-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2141BM5-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 MIC2141BM5-TR reliable?
The price and inventory of MIC2141BM5-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2141BM5-TR is usually 5 days.
3.What payment methods are accepted for MIC2141BM5-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2141BM5-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2141BM5-TR?
MIC2141BM5-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2141BM5-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 MIC2141BM5-TR?
For technical support, including MIC2141BM5-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2141BM5-TR requirements.
6.How does Aetrix verify that MIC2141BM5-TR is sourced from the original manufacturer or authorized distributors?
All MIC2141BM5-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 MIC2141BM5-TR meets industry standards.
7.What is the process for return or replacement of MIC2141BM5-TR?
All MIC2141BM5-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2141BM5-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 MIC2141BM5-TR part is unused and in its original packaging.
Return procedure for MIC2141BM5-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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