My Inquiry
My Account
Microchip Technology MIC2145BMMTR
- Part No.:
- MIC2145BMMTR
- Manufacturer:
- Microchip Technology
- Package:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Datasheet:
-
MIC2145BMMTR.pdf
- Description:
- IC REG BOOST FLYBACK ADJ 8MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:7,500
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MIC2145BMMTR from Microchip Technology is a synchronous buck DC-DC controller IC designed for high-efficiency, medium-power POL (point-of-load) conversion. It supports 4.5V to 28V input, delivers up to 30A output current with external MOSFETs, and features programmable switching frequency from 100kHz to 1MHz. Used in telecom power modules and industrial CPU core supplies.
For engineers reviewing the MIC2145BMMTR datasheet, MIC2145BMMTR pinout, MIC2145BMMTR application, or MIC2145BMMTR equivalent, key selection criteria include its voltage-mode control architecture, integrated 5V gate driver, adjustable soft-start time, and overcurrent protection via external sense resistor.
Technical Context
The MIC2145BMMTR implements voltage-mode PWM control with an internal error amplifier and reference, enabling stable regulation across line and load transients. It includes dedicated EN/UVLO input, power-good flag (PGOOD), and thermal shutdown at 150°C.
It requires external high-side and low-side N-channel MOSFETs, supports external compensation via Type II network, and accepts feedback from either resistive divider or remote-sense configuration. No internal LDO - VCC must be supplied externally between 4.75V and 5.5V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Control Architecture | Voltage-mode PWM with internal 1.22V reference and error amplifier |
| Input Voltage Range | 4.5V to 28V - supports 5V, 12V, and 24V intermediate bus architectures |
| Switching Frequency | 100kHz to 1MHz - adjustable via RT resistor; sets trade-off between efficiency and component size |
| Output Current Capability | Up to 30A - determined by external MOSFET selection and thermal design |
| Gate Drive Output | 5V, 2A peak - drives standard N-channel MOSFETs without external drivers |
| Soft-Start Time | Programmable via external capacitor - prevents inrush current during power-up |
Pinout & Package
Microchip MIC2145BMMTR is housed in a 20-pin 4mm × 4mm thermally enhanced QFN package with exposed thermal pad (MM suffix). Pin count and layout match JEDEC MO-220 variation VQFN-20.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary input supply | Connects to 4.5–28V input rail; decoupling required near pin |
| VCC | Bias supply input | Must be 4.75–5.5V; powers internal logic and gate driver |
| PHASE | High-side MOSFET source connection | Connects to source of external high-side FET; used for bootstrap charging |
| BOOT | Bootstrap supply node | Drives high-side gate via external bootstrap diode/capacitor |
| SW | Switch node | Connects to drain of high-side and source of low-side MOSFETs |
| FB | Feedback input | Resistive divider or remote-sense point for output voltage regulation |
| EN/UVLO | Enable and undervoltage lockout | Active-high enable; UVLO threshold set by external resistor divider |
| PGOOD | Power-good open-drain output | Asserts after output reaches ±10% of target and remains stable |
Key Features
| Feature | Design Value |
|---|---|
| Voltage-mode PWM control | Enables predictable loop compensation and stable operation with wide input/output ranges |
| Integrated 5V/2A gate driver | Directly drives standard N-channel MOSFETs without external driver stages |
| Programmable soft-start | Prevents output overshoot and inrush current using external capacitor |
| Adjustable switching frequency (100kHz–1MHz) | Allows optimization of magnetic size vs. efficiency for specific board space constraints |
| Thermal shutdown (150°C) | Protects IC under sustained overload or poor heatsinking conditions |
Applications
| Telecom Power Modules | Industrial CPU Core Supplies |
|---|---|
Use Scenario: 12V intermediate bus powering ASIC/FPGA core rails in base station equipment. IC Role / Device Role / Timing Role: Primary buck controller regulating 0.8V–3.3V output with tight transient response. Use Value: Delivers 30A output with <1% load regulation and fast PGOOD assertion for system sequencing. | Use Scenario: Point-of-load regulator for multi-core processor VDD in factory automation controllers. IC Role / Device Role / Timing Role: Synchronous buck controller managing dynamic load steps up to 10A/µs. Use Value: Voltage-mode control ensures stability with ceramic output capacitors and minimal phase margin tuning. |
| Network Switching Systems | Test & Measurement Equipment |
Use Scenario: 24V-to-5V conversion for packet processing ASICs in enterprise switches. IC Role / Device Role / Timing Role: High-efficiency POL controller with programmable frequency to avoid noise coupling into sensitive analog sections. Use Value: 1MHz max switching frequency enables compact 2.2µH inductors and reduces EMI filter footprint. | Use Scenario: Precision analog subsystem power rail generation requiring low-noise, well-regulated supply. IC Role / Device Role / Timing Role: Buck controller supplying low-noise 3.3V rail for ADC/DAC reference circuits. Use Value: Adjustable soft-start and precise 1.22V reference minimize startup disturbance to measurement accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Current-mode control; wider VIN range (6–100V); no integrated gate driver - requires external driver | Better suited for high-input-voltage industrial systems; less suitable for space-constrained 12V POL | Choose LM5116PWPR when input exceeds 28V or current-mode control is preferred for multi-phase sync |
| TPS40210DGQR | Voltage-mode like MIC2145BMMTR but fixed 300kHz frequency; lower gate drive (1.5A); no PGOOD output | Limited flexibility in EMI-sensitive designs; lacks power-good signaling for system sequencing | Choose TPS40210DGQR only for cost-sensitive, fixed-frequency 12V-to-3.3V applications without sequencing needs |
Compared with LM5116PWPR and TPS40210DGQR, the MIC2145BMMTR provides integrated 5V/2A gate drive, programmable frequency, and PGOOD - making it optimal for compact, sequenced, medium-power POL designs where external driver complexity must be minimized.
Availability
MIC2145BMMTR is available at Aetrix Electronics and suitable for telecom power modules, industrial CPU core supplies, and network switching systems requiring stable component supply and long-term production continuity.
Supply support for MIC2145BMMTR 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
Microchip Technology is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and communications markets.
The MIC2145BMMTR belongs to Microchip's MIC214x family of synchronous buck controllers, engineered for high-efficiency, flexible POL conversion in space-constrained, medium-current applications.
FAQ
What is the recommended input voltage range for the MIC2145BMMTR?
The MIC2145BMMTR operates with an input voltage range of 4.5V to 28V. This makes it compatible with common intermediate bus voltages including 5V, 12V, and 24V systems. Operation below 4.5V triggers undervoltage lockout, and exceeding 28V may damage the IC. Always use appropriate input filtering and decoupling capacitors close to the VIN and VCC pins for reliable performance of the MIC2145BMMTR.
Does the MIC2145BMMTR integrate a gate driver, and what are its specifications?
Yes, the MIC2145BMMTR integrates a 5V gate driver capable of delivering up to 2A peak current. It is optimized to directly drive standard N-channel MOSFETs without requiring external driver stages. The driver supports both high-side and low-side configurations via BOOT and PHASE pins. This integrated capability simplifies layout and reduces BOM count in designs using the MIC2145BMMTR.
How is output voltage regulated on the MIC2145BMMTR?
The MIC2145BMMTR uses a precision 1.22V internal reference and voltage-mode PWM control to regulate output voltage. Feedback is applied to the FB pin via a resistive divider from the output rail or through remote-sense connections. Compensation is implemented externally using a Type II network on the COMP pin. This architecture ensures stable regulation across line, load, and temperature variations for the MIC2145BMMTR.
What protection features does the MIC2145BMMTR include?
The MIC2145BMMTR includes thermal shutdown at 150°C, programmable overcurrent protection via external sense resistor, and undervoltage lockout on both VIN and VCC rails. It also provides a PGOOD open-drain signal that asserts only after output voltage stabilizes within ±10% of target. These protections ensure robust operation and system-level fault handling in demanding applications using the MIC2145BMMTR.
Can the MIC2145BMMTR be synchronized to an external clock?
No, the MIC2145BMMTR does not support external clock synchronization. Its switching frequency is set solely by an external resistor connected to the RT pin, allowing adjustment from 100kHz to 1MHz. For designs requiring synchronization to avoid beat frequencies or enable multi-phase interleaving, an alternative controller with SYNC input - such as the MIC2177 - should be considered instead of the MIC2145BMMTR.
MIC2145BMMTR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-TSSOP, 8-MSOP (0.118", 3.00mm Width)
- Packaging:
- Bulk
- 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:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-MSOP
MIC2145BMMTR FAQ
1.How can I place an order for MIC2145BMMTR through Aetrix?
Please submit a Request for Quotation (RFQ) for MIC2145BMMTR 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 MIC2145BMMTR reliable?
The price and inventory of MIC2145BMMTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MIC2145BMMTR is usually 5 days.
3.What payment methods are accepted for MIC2145BMMTR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MIC2145BMMTR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MIC2145BMMTR?
MIC2145BMMTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MIC2145BMMTR 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 MIC2145BMMTR?
For technical support, including MIC2145BMMTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MIC2145BMMTR requirements.
6.How does Aetrix verify that MIC2145BMMTR is sourced from the original manufacturer or authorized distributors?
All MIC2145BMMTR 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 MIC2145BMMTR meets industry standards.
7.What is the process for return or replacement of MIC2145BMMTR?
All MIC2145BMMTR units undergo pre-shipment inspection (PSI). If there is an issue with MIC2145BMMTR, 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 MIC2145BMMTR part is unused and in its original packaging.
Return procedure for MIC2145BMMTR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MIC2145BMMTR 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…
