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Microchip Technology MIC2145YMM-TR
- Part No.:
- MIC2145YMM-TR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC2145YMM-TR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,418
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Product details
Overview
MIC2145YMM-TR from Micrel is a high-efficiency, adjustable-output boost switching regulator delivering over 2.5W output power with input range 2.4V–16V, programmable peak switch current (420mA–2A), 450kHz switching frequency, and 85%+ efficiency-used in portable LCD bias and white LED driver circuits.
For engineers reviewing the MIC2145YMM-TR datasheet, MIC2145YMM-TR pinout, MIC2145YMM-TR application, or MIC2145YMM-TR equivalent, key selection criteria include its MSOP-8 package, 200µA quiescent current, 0.5µA shutdown current, feedback reference of 1.08V ±2%, and soft-start capability for controlled output ramp-up.
Technical Context
The MIC2145YMM-TR implements constant-off-time control with dual comparators regulating both inductor peak current and output voltage via an internal 250–750mΩ N-channel MOSFET switch. Its programmable RSET pin sets peak current limit across temperature, enabling optimization for efficiency or inductor size.
It supports basic and bootstrapped configurations: VDD tied to VIN for light-load efficiency (<70mA), or to VOUT for heavy-load efficiency (>70mA). Thermal shutdown activates at ~150°C junction temperature, and feedback hysteresis is 18mV for stable regulation.
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 external resistor divider on FB pin with 1.08V reference. |
| Peak Switch Current | Programmable 420mA–2A via RSET resistor - enables trade-off between efficiency and inductor saturation margin. |
| Switching Frequency | Up to 450kHz - allows use of compact 4.7µH or 10µH surface-mount inductors. |
| 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; hysteresis of 18mV improves load transient stability. |
| Operating Temp Range | –40°C to +85°C ambient - qualified for industrial and consumer portable environments. |
Pinout & Package
The MIC2145YMM-TR is housed in an 8-lead MSOP (MM) package, 3mm × 3mm footprint, 0.65mm pitch, with exposed thermal pad for enhanced thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Logic-high ≥1.5V enables regulation; ≤0.7V disables with 0.5µA shutdown current. |
| SS | Soft-start capacitor node | Connects external capacitor to ground to control output voltage rise time and initial peak current ramp. |
| RSET | Peak current limit programming | External resistor sets MOSFET peak current threshold (420mA–2A); lower R = higher current. |
| PGND | Power ground return | High-current return path for internal MOSFET source; must be low-inductance connection to minimize noise. |
| SW | Switch node | Drain of internal N-MOSFET; connects to inductor and Schottky diode anode in boost topology. |
| VDD | Supply input | +2.4V to +16V input powering internal circuitry; can be connected to VIN (basic) or VOUT (bootstrap). |
| FB | Feedback sense input | Monitors output voltage via resistor divider; regulates output to 1.08V reference with ±2% tolerance. |
| SGND | Small-signal ground | Analog ground reference for FB, SS, EN, and RSET; separate from PGND to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable peak current limit | Set externally via RSET resistor (200Ω–10kΩ) to match inductor saturation and optimize efficiency across load conditions. |
| Soft-start control | Internal circuit charges external SS capacitor to gradually ramp output voltage and prevent inrush current or overshoot. |
| Low quiescent current | 200µA typical in active mode enables >100-hour runtime in coin-cell-powered devices at light loads. |
| Thermal shutdown protection | Automatically disables switching when junction temperature exceeds ~150°C, preventing damage during overload or poor heatsinking. |
| Flexible configuration modes | Basic (VDD = VIN) for light loads; bootstrap (VDD = VOUT) for heavy loads - selectable without component change. |
Applications
| Flash LED driver | LCD bias supply |
|---|---|
Use Scenario: Powering high-brightness flash LEDs in smartphone cameras requiring 5V/500mA from 3.3V input. IC Role / Device Role / Timing Role: Boost converter providing regulated 5V output with programmable current limit to avoid LED overcurrent during burst mode. Use Value: Achieves >85% efficiency at 500mA load using 10µH inductor and MBR0530 Schottky diode, minimizing thermal stress in space-constrained modules. | Use Scenario: Generating 10V–15V bias for TFT-LCD panel gate drivers in handheld medical displays. IC Role / Device Role / Timing Role: Adjustable boost regulator delivering stable 10V output with <167mV hysteresis ripple, supporting wide input (3.0–5.0V) battery operation. Use Value: Bootstrap configuration enables >80% efficiency at 350mA load, reducing heat generation and extending battery life in always-on clinical devices. |
| White LED driver | DSL line bias supply |
Use Scenario: Driving 4 parallel white LEDs (3.2V each) from 3.6V input in portable lighting equipment. IC Role / Device Role / Timing Role: Constant-voltage boost controller with soft-start preventing LED current surge during power-on. Use Value: Programmable RSET allows precise peak current setting (e.g., 1.2A) to maintain uniform LED brightness while avoiding inductor saturation. | Use Scenario: Providing isolated 12V bias for DSL line driver ICs in residential gateway modems operating from 5V rail. IC Role / Device Role / Timing Role: High-efficiency boost converter delivering 12V/150mA with low EMI due to fixed 450kHz frequency and clean SW node transitions. Use Value: 0.5µA shutdown current enables full-system power gating during standby, meeting Energy Star® low-power requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar boost converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS61088RHLR | Higher 2.7V–12V input range; 13.2V max output; integrated 13mΩ FET; 2.5A peak current. | Supports higher output current and tighter output regulation but requires larger external components for same 2.5W output. | Preferred for designs needing >1A output or tighter VOUT accuracy; not drop-in due to different pinout and enable logic. |
| MAX17062ETA+ | Fixed 5V output; 2.5V–5.5V input; 1.2MHz switching; 1.2A peak current; integrated compensation. | Limited to fixed 5V output; lacks RSET programmability and adjustable VOUT above 5V. | Suitable only for 5V-only applications where board space is critical; no RSET flexibility or >5V support. |
Compared with TPS61088RHLR and MAX17062ETA+, the MIC2145YMM-TR offers unique programmable peak current and 16V adjustable output in a compact MSOP-8, making it optimal for multi-voltage portable bias supplies where efficiency at light-to-moderate loads and design flexibility outweigh raw current capability.
Availability
MIC2145YMM-TR is available at Aetrix Electronics and suitable for flash LED drivers, LCD bias supplies, white LED drivers, and DSL line bias applications requiring stable component supply and long-term industrial availability.
Supply support for MIC2145YMM-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 acquired by Microchip Technology in 2015, known for high-performance power management and interface ICs.
The MIC2145 product line was designed for space-constrained portable electronics requiring efficient, adjustable DC-DC boost conversion with minimal external components and robust thermal behavior.
FAQ
What is the maximum output voltage supported by the MIC2145YMM-TR?
The MIC2145YMM-TR supports an adjustable output voltage up to 16V, limited by the voltage rating of its internal power MOSFET. This is achieved using a resistor divider on the FB pin referenced to the 1.08V internal bandgap. Output voltages beyond 16V require flyback topology reconfiguration, not supported natively by the MIC2145YMM-TR's boost architecture.
How does the RSET pin affect peak current and efficiency in the MIC2145YMM-TR?
The RSET pin on the MIC2145YMM-TR sets the peak switch current limit via an external resistor, ranging from 420mA (RSET = 10kΩ) to 2A (RSET = 200Ω). Selecting RSET optimizes efficiency: too high causes inductor saturation and losses; too low reduces power capability. Datasheet Figure 13 shows peak current vs. RSET, confirming linear programmability across temperature.
Can the MIC2145YMM-TR operate with a 2.4V input and deliver 5V at 500mA?
Yes, the MIC2145YMM-TR is specified to deliver 5V/500mA from a 3.3V input, and its 2.4V minimum input supports operation down to that level. At 2.4V input, output current capability decreases due to duty-cycle limits and conduction losses; typical data shows ≥300mA at 5V with 2.4V input in bootstrap configuration using a 10µH inductor and MBR0530 diode.
What is the purpose of separating SGND and PGND pins on the MIC2145YMM-TR?
The MIC2145YMM-TR separates SGND (small-signal ground) and PGND (power ground) to isolate noise-sensitive analog circuitry (FB, EN, SS, RSET) from high-di/dt switching currents. Routing PGND directly to the input/output capacitor ground planes and keeping SGND as a quiet reference prevents feedback errors and improves regulation stability-critical for maintaining ±2% output accuracy under dynamic loads.
Does the MIC2145YMM-TR support both basic and bootstrap configurations, and how do they differ?
Yes, the MIC2145YMM-TR supports both configurations: basic (VDD connected to VIN) for light loads (<70mA) and bootstrap (VDD connected to VOUT) for heavy loads (>70mA). Bootstrap improves efficiency by raising gate drive voltage, reducing MOSFET on-resistance losses. The choice affects no other pins or external components-only the VDD connection-making it a simple layout-level optimization.
MIC2145YMM-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 8-MSOP
MIC2145YMM-TR FAQ
1.How can I place an order for MIC2145YMM-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2145YMM-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 MIC2145YMM-TR reliable?
The price and inventory of MIC2145YMM-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2145YMM-TR is usually 5 days.
3.What payment methods are accepted for MIC2145YMM-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2145YMM-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2145YMM-TR?
MIC2145YMM-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2145YMM-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 MIC2145YMM-TR?
For technical support, including MIC2145YMM-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2145YMM-TR requirements.
6.How does Aetrix verify that MIC2145YMM-TR is sourced from the original manufacturer or authorized distributors?
All MIC2145YMM-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 MIC2145YMM-TR meets industry standards.
7.What is the process for return or replacement of MIC2145YMM-TR?
All MIC2145YMM-TR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2145YMM-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 MIC2145YMM-TR part is unused and in its original packaging.
Return procedure for MIC2145YMM-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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