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Microchip Technology MIC2145BML-TR
- Part No.:
- MIC2145BML-TR
- Manufacturer:
- Microchip Technology
- Package:
- 10-VFDFN Exposed Pad, 10-MLF®
- Datasheet:
-
MIC2145BML-TR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 10MLF
- Quantity:
- Payment:
- Shipping:
Inventory:1,729
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Product details
Overview
MIC2145BML-TR from Micrel is a programmable peak-current-limit boost switching regulator delivering over 2.5W output power, operating from 2.4V–16V input and supporting adjustable output up to 16V, with 450kHz switching frequency, 200µA quiescent current, and 0.5µA shutdown current - used in portable LCD bias and white LED driver circuits.
For engineers reviewing the MIC2145BML-TR datasheet, MIC2145BML-TR pinout, MIC2145BML-TR application, or MIC2145BML-TR equivalent, key selection criteria include programmable peak switch current (via RSET), soft-start control, feedback voltage reference (1.08V ±2%), thermal shutdown, and MLF-10L package compatibility for space-constrained designs.
Technical Context
The MIC2145BML-TR implements constant-off-time regulation using dual comparators: one monitors inductor peak current (set externally via RSET), the other regulates output voltage via FB pin with 18mV hysteresis and 1.08V reference. It features an integrated 250–400mΩ MOSFET switch (at VDD = 10V) and built-in thermal shutdown at ~150°C.
Its architecture supports boost, SEPIC, and flyback topologies. Soft start is controlled by external capacitor on SS pin, while EN enables logic-level control (1.5V high/0.7V low). The device operates across –40°C to +85°C ambient temperature with θJA = 60°C/W in its 3mm×3mm MLF-10L package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 2.4V to 16V - supports single-cell Li-ion and 3–4-cell alkaline/NiMH battery inputs. |
| Output Voltage Range | Adjustable up to 16V - set via resistor divider on FB pin with 1.08V reference. |
| Switching Frequency | Up to 450kHz - enables use of small surface-mount inductors (e.g., 4.7µH or 10µH). |
| Peak Switch Current | Programmable 420mA–2A via RSET - allows optimization of efficiency and inductor size. |
| Quiescent Current | 200µA typical - minimizes battery drain in always-on portable systems. |
| Shutdown Current | 0.5µA typical - ensures ultra-low leakage during system sleep modes. |
| Feedback Reference | 1.08V ±2% - defines output voltage accuracy and stability under load/temperature variation. |
| Package | 3mm×3mm MLF-10L - thermally efficient (θJA = 60°C/W), suitable for compact PCB layouts. |
Pinout & Package
The MIC2145BML-TR is housed in a 3mm×3mm, 10-pin MicroLeadFrame (MLF™) package with exposed thermal pad. Pin numbering follows standard MLF orientation (Pin 1 marked).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | EN | Enable input: ≥1.5V activates regulator; ≤0.7V shuts down with 0.5µA leakage. |
| 2 | SS | Soft-start capacitor node: controls output voltage ramp rate and peak current limit rise time. |
| 3 | RSET | Peak current limit programming: sets switch current threshold via external resistor (420mA–2A range). |
| 4,5 | PGND | Power ground return: connects internal MOSFET source; must be low-impedance path to minimize noise. |
| 6,7 | SW | Switch node: drains internal MOSFET; connects to inductor and diode in boost topology. |
| 8 | VDD | Supply input: powers internal circuitry from 2.4V–16V; can be tied to VOUT in bootstrap mode. |
| 9 | FB | Feedback input: senses output voltage via resistor divider; regulates to 1.08V reference. |
| 10 | SGND | Small-signal ground: reference for FB, EN, SS, RSET; separate from PGND to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable Peak Current Limit | Enables precise trade-off between efficiency, inductor saturation margin, and EMI via external RSET resistor. |
| Soft Start Control | External capacitor on SS pin prevents inrush current and output overshoot during startup. |
| Low Quiescent Current | 200µA operation enables >100-hour battery life in standby-powered portable devices. |
| Thermal Shutdown Protection | Automatic disable above ~150°C junction temperature prevents damage under overload or poor heatsinking. |
| Multi-Topology Support | Configurable as boost, SEPIC, or flyback - expands use beyond basic step-up to isolated or buck-boost applications. |
Applications
| Flash LED Driver | LCD Bias Supply |
|---|---|
Use Scenario: Driving high-brightness flash LEDs in smartphone cameras requiring stable 5V–15V supply from 3.3V battery rail. IC Role / Device Role / Timing Role: Boost converter providing regulated output with programmable current limit to match LED forward voltage and pulse current demands. Use Value: Achieves >85% efficiency at 150mA output, minimizing thermal stress and extending battery runtime during flash operation. | Use Scenario: Generating 10V–15V bias voltage for TFT-LCD panel gate drivers in handheld medical displays. IC Role / Device Role / Timing Role: Adjustable-output boost regulator with soft start ensuring glitch-free panel initialization and stable VGH/VGL generation. Use Value: Delivers 10V/100mA with <167mV output hysteresis and <10mV ripple when paired with feed-forward capacitor (CFF). |
| White LED Driver | DSL Bias Supply |
Use Scenario: Powering 4–10 parallel white LEDs in industrial handheld scanners with 3.0V–5.0V input. IC Role / Device Role / Timing Role: Constant-voltage boost controller maintaining consistent LED brightness across varying battery voltage and temperature. Use Value: Supports 15V output at 250mA with >80% efficiency using 10µH inductor and MBR0530 Schottky diode. | Use Scenario: Providing 12V bias for DSL line driver ICs in embedded broadband modems operating from 3.3V or 5V rails. IC Role / Device Role / Timing Role: High-efficiency, low-noise boost converter meeting stringent DSL spectral mask requirements. Use Value: Delivers 12V/100mA with <50mVpp ripple and <0.5µA shutdown current, reducing standby power in always-on CPE devices. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61040DRVR | Fixed 500kHz switching frequency; no RSET-based peak current programming; 1.25V feedback reference. | Lacks programmable current limit and soft-start flexibility; optimized for fixed 5V output rather than wide-range adjustment. | Select when fixed-frequency EMI control is prioritized over efficiency tuning or multi-topology support. |
| LT3467EDD | Higher 1.3MHz switching frequency; integrated Schottky diode; 1.25V feedback reference; no RSET pin. | Smaller external components but limited to lower output current (600mA max); no SEPIC/flyback capability. | Choose for ultra-compact 5V/300mA designs where board area outweighs topology flexibility and peak-current optimization. |
Compared with TPS61040DRVR and LT3467EDD, the MIC2145BML-TR offers unique programmable peak current control and multi-topology support, enabling higher output power (>2.5W) and better efficiency optimization across variable loads and input conditions - critical for battery-powered LCD and LED applications.
Availability
MIC2145BML-TR is available at Aetrix Electronics and suitable for flash LED drivers, LCD bias supplies, white LED drivers, and DSL bias supplies requiring stable component supply, long-term manufacturability, and RoHS-compliant packaging.
Supply support for MIC2145BML-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-performance power management and timing solutions.
The MIC2145 product line was designed for portable, space-constrained DC-DC conversion applications requiring high efficiency, low quiescent current, and flexible topology support - especially in battery-powered displays and lighting systems.
FAQ
What is the maximum output voltage supported by the MIC2145BML-TR?
The MIC2145BML-TR supports an adjustable output voltage up to 16V, limited by the voltage rating of its internal power MOSFET. Output is set via a resistor divider on the FB pin using a 1.08V reference. Exceeding 16V requires a flyback configuration instead of standard boost.
How does the RSET pin function in the MIC2145BML-TR?
The RSET pin on the MIC2145BML-TR programs the peak switch current limit from 420mA to 2A using an external resistor. This allows designers to optimize efficiency, avoid inductor saturation, and tailor performance for specific load conditions - a key differentiator versus fixed-current boost controllers.
What package type is used for the MIC2145BML-TR?
The MIC2145BML-TR uses a 3mm×3mm, 10-pin MicroLeadFrame (MLF™) package with exposed thermal pad. Its θJA of 60°C/W provides superior thermal performance compared to the MSOP-8 variant (206°C/W), making it suitable for higher-power portable applications.
Can the MIC2145BML-TR operate in SEPIC or flyback topologies?
Yes, the MIC2145BML-TR explicitly supports SEPIC and flyback configurations per its datasheet. Unlike basic boost-only regulators, its control architecture and pinout allow reconfiguration for non-inverting buck-boost (SEPIC) or isolated (flyback) operation - expanding its utility in diverse power architectures.
What is the feedback voltage reference accuracy of the MIC2145BML-TR?
The MIC2145BML-TR has a feedback voltage reference of 1.08V with ±2% tolerance (1.058V–1.102V) over temperature. This tight tolerance ensures accurate output voltage regulation across –40°C to +85°C ambient, critical for stable LCD bias and LED current control.
MIC2145BML-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 10-VFDFN Exposed Pad, 10-MLF®
- 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):
- 2.4V
- Voltage - Input (Max):
- 16V
- Voltage - Output (Min/Fixed):
- 2.4V
- Voltage - Output (Max):
- 16V
- Current - Output:
- 500mA
- Frequency - Switching:
- 450kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 10-MLF® (3x3)
MIC2145BML-TR FAQ
1.How can I place an order for MIC2145BML-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2145BML-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 MIC2145BML-TR reliable?
The price and inventory of MIC2145BML-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2145BML-TR is usually 5 days.
3.What payment methods are accepted for MIC2145BML-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2145BML-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2145BML-TR?
MIC2145BML-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2145BML-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 MIC2145BML-TR?
For technical support, including MIC2145BML-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2145BML-TR requirements.
6.How does Aetrix verify that MIC2145BML-TR is sourced from the original manufacturer or authorized distributors?
All MIC2145BML-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 MIC2145BML-TR meets industry standards.
7.What is the process for return or replacement of MIC2145BML-TR?
All MIC2145BML-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2145BML-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 MIC2145BML-TR part is unused and in its original packaging.
Return procedure for MIC2145BML-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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