My Inquiry
My Account
Microchip Technology MIC2145YMM
- Part No.:
- MIC2145YMM
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC2145YMM.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2145YMM from Micrel is a high-efficiency, adjustable-output boost switching regulator delivering over 2.5W output power with input range 2.4V–16V and programmable peak switch current up to 2A. It features 450kHz switching frequency, 200µA quiescent current, and 0.5µA shutdown current. Designed for space-constrained portable systems, it supports LCD bias, white LED driving, and DSL local voltage conversion.
For engineers reviewing the MIC2145YMM datasheet, MIC2145YMM pinout, MIC2145YMM application, or MIC2145YMM equivalent, key selection criteria include its MSOP-8 package, adjustable 2.4V–16V output, programmable current limit via RSET, soft-start functionality, and thermal shutdown protection.
Technical Context
The MIC2145YMM uses constant-off-time control with dual comparators: one regulates inductor peak current (set externally via RSET), the other monitors feedback voltage with 18mV hysteresis. Regulation occurs by gating an internal 250–750mΩ MOSFET switch at up to 450kHz.
It implements boost topology with optional bootstrap configuration for >70mA loads, achieving >85% efficiency at 10V/100mA with 3.3V input. The device supports SEPIC and flyback topologies and includes built-in thermal shutdown at ~150°C junction temperature.
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 0.42A–2A - configured by RSET resistor to optimize efficiency and inductor size. |
| Switching Frequency | Up to 450kHz - enables use of compact 4.7µH or 10µH surface-mount inductors. |
| Quiescent Current | 200µA typical - minimizes battery drain in always-on portable applications. |
| Shutdown Current | 0.5µA typical - ensures ultra-low leakage during system sleep modes. |
| Efficiency | Over 85% at 10V/100mA, VIN=3.3V - achieved using low-RDS(on) internal MOSFET and optimized control loop. |
| Operating Temperature | –40°C to +85°C ambient - qualified for industrial and consumer portable environments. |
Pinout & Package
The MIC2145YMM is housed in an 8-lead MSOP (MM) package with exposed pad for thermal performance. Pin numbering follows standard MSOP orientation with Pin 1 marked by notch or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| EN | Enable input | Logic-high ≥1.5V activates regulator; ≤0.7V disables with 0.5µA shutdown current. |
| SS | Soft-start capacitor node | Connects external capacitor to ground to control output voltage ramp rate and limit inrush. |
| RSET | Current limit programming | Sets peak switch current threshold via external resistor (200Ω–10kΩ range). |
| PGND | Power ground return | Low-impedance path for internal MOSFET source and high-current switching loop. |
| SW | Switch node | Drain of internal MOSFET; connects to inductor and diode in boost topology. |
| VDD | Supply input | Provides 2.4V–16V bias for internal circuitry; can be tied to VOUT in bootstrap mode. |
| FB | Feedback input | Monitors output via resistor divider; references 1.08V ±2% internal bandgap. |
| SGND | Small-signal ground | Reference for FB, EN, SS, and RSET; separated from PGND to reduce noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Programmable peak current limit | Enables optimization of inductor size and efficiency across load conditions using external RSET. |
| Soft-start with external capacitor | Prevents output overshoot and limits inrush current by controlling VOUT rise time and current limit ramp. |
| Low quiescent current (200µA) | Extends battery life in always-on portable devices without sacrificing startup speed or regulation accuracy. |
| Thermal shutdown protection | Disables switching when junction temperature exceeds ~150°C, preventing damage under overload or poor heatsinking. |
| Bootstrap-capable VDD connection | Allows VDD to be connected to VOUT for improved heavy-load efficiency (>70mA), reducing internal supply losses. |
Applications
| Flash LED driver | LCD bias supply |
|---|---|
Use Scenario: Driving high-brightness flash LEDs in smartphone cameras requiring stable 5V–15V at up to 500mA peak. IC Role / Device Role / Timing Role: Boost controller regulating output voltage while dynamically limiting peak switch current to match LED pulse profile. Use Value: Achieves >85% efficiency at 15V/250mA with 3.6V input, minimizing thermal stress and extending battery runtime per flash event. | Use Scenario: Generating 10V–15V bias rails for TFT-LCD panels in handheld medical or industrial displays. IC Role / Device Role / Timing Role: Adjustable boost converter providing precise, ripple-sensitive output with feed-forward capacitor support for low-noise operation. Use Value: Delivers 10V/150mA with <167mV output hysteresis and <10mV AC ripple using CFF, ensuring stable panel contrast and grayscale fidelity. |
| White LED driver | DSL bias supply |
Use Scenario: Powering 1–10 parallel white LEDs in portable lighting or backlighting with dimming control via EN pin. IC Role / Device Role / Timing Role: Constant-voltage boost regulator with programmable current limit to prevent LED overcurrent during startup or fault conditions. Use Value: Supports 5V–15V output with RSET-adjusted peak current, enabling consistent brightness across varying battery voltage (3.0V–4.2V). | Use Scenario: Providing localized 12V–15V bias for DSL line drivers and analog front-end circuits in customer-premises equipment. IC Role / Device Role / Timing Role: High-efficiency, low-noise DC-DC converter operating from 3.3V or 5V system rails in noise-sensitive telecom signal paths. Use Value: Maintains >80% efficiency at 12V/100mA with 3.6V input and achieves <100µV RMS output ripple using X5R ceramic capacitors. |
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 2.2MHz switching frequency; integrated 13mΩ FET; fixed 5V/12V options plus adjustable version. | Targets higher-frequency, smaller-inductor designs; lacks RSET-based current programming flexibility. | Preferred when board area is critical and fixed-output variants suffice; requires layout rework due to different pinout and thermal pad. |
| MAX17062ETA+ | Lower 1.2MHz frequency; 3.5A peak current; 2.5V–5.5V input only; no soft-start capacitor option. | Optimized for USB-powered devices; not suitable for wide-input (2.4V–16V) battery systems. | Select when input is regulated 3.3V/5V and higher peak current is needed; incompatible with direct replacement due to narrower VIN range and missing SS pin. |
Compared with TPS61088RHLR and MAX17062ETA+, the MIC2145YMM offers unique RSET-programmable peak current and wide 2.4V–16V input support ideal for multi-chemistry battery systems, but requires external MOSFET and diode - trading integration for design flexibility and thermal manageability in compact MSOP-8 footprint.
Availability
MIC2145YMM is available at Aetrix Electronics and suitable for flash LED driver, LCD bias supply, white LED driver, DSL bias supply, and local 3V-to-5V conversion requiring stable component supply across industrial and portable electronics programs.
Supply support for MIC2145YMM 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 semiconductor company specializing in analog, power management, and timing solutions before its acquisition by Microchip Technology in 2015.
The MIC2145YMM belongs to Micrel's high-efficiency boost converter product line, designed specifically for space-constrained portable applications demanding wide input range, low quiescent current, and flexible output adjustment.
FAQ
What is the maximum output voltage supported by the MIC2145YMM?
The MIC2145YMM supports an adjustable output voltage up to 16V, limited by the voltage rating of its internal power MOSFET and external components. This is achieved using a resistor divider on the FB pin referenced to a 1.08V internal bandgap. Output voltages above 16V require flyback topology implementation rather than basic boost configuration. The MIC2145YMM datasheet confirms this limit under Absolute Maximum Ratings and Operating Ratings sections.
How does the RSET pin function in the MIC2145YMM?
The RSET pin on the MIC2145YMM sets the peak switch current threshold via an external resistor, enabling precise control over inductor sizing and efficiency optimization. With RSET values from 200Ω to 10kΩ, peak current ranges from 0.42A to 2A. This feature allows designers to avoid inductor saturation and tailor performance for specific load profiles. The MIC2145YMM Electrical Characteristics table provides measured values for multiple RSET configurations at different VDD levels.
What package type is used for the MIC2145YMM?
The MIC2145YMM uses an 8-lead MSOP (Mini Small Outline Package) with exposed thermal pad, designated as "MM" in Micrel's ordering nomenclature. Its dimensions are 3.0mm × 3.0mm × 1.0mm, and it features gull-wing leads compatible with standard surface-mount assembly processes. The MIC2145YMM Package Information diagram and Ordering Information table explicitly confirm the MSOP-8 package for this variant.
Does the MIC2145YMM support both basic and bootstrap configurations?
Yes, the MIC2145YMM supports both configurations: in basic mode, VDD connects to VIN for light-load efficiency (<70mA); in bootstrap mode, VDD connects to VOUT for improved heavy-load efficiency (>70mA). Application Figures 6 and 7 in the MIC2145YMM datasheet provide complete schematics and performance curves for both topologies, showing measurable efficiency gains of 3–5% at higher currents in bootstrap mode.
What is the typical efficiency of the MIC2145YMM at 10V/100mA output?
The MIC2145YMM achieves over 85% efficiency at 10V/100mA output with 3.3V input, as shown in Figure 1 of the datasheet's Typical Characteristics section. Efficiency remains above 80% across most operating points, including 5V/500mA output with 3.3V input. These values are measured using recommended 10µH inductors and MBR0530 Schottky diodes under standard test conditions specified in the Electrical Characteristics table.
MIC2145YMM Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Tube
- 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 FAQ
1.How can I place an order for MIC2145YMM through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2145YMM 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 reliable?
The price and inventory of MIC2145YMM are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2145YMM is usually 5 days.
3.What payment methods are accepted for MIC2145YMM?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2145YMM transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2145YMM?
MIC2145YMM orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2145YMM 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?
For technical support, including MIC2145YMM datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2145YMM requirements.
6.How does Aetrix verify that MIC2145YMM is sourced from the original manufacturer or authorized distributors?
All MIC2145YMM 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 meets industry standards.
7.What is the process for return or replacement of MIC2145YMM?
All MIC2145YMM units undergo pre-shipment inspection (PSI). If there is an issue with MIC2145YMM, 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 part is unused and in its original packaging.
Return procedure for MIC2145YMM:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2145YMM Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
