MCP19123-E/MQ Microchip Integrated Circuit (Quad Flat No-Lead) In Stock
Microchip MCP19123-E/MQ is a digitally enhanced power analog buck controller with current-mode PWM control, accepting 4.5 V to 40 V input and targeting 3 V to 5 V regulated output in a 28-pin QFN package. It combines analog loop speed with digital configuration for adaptive power management in DC-DC conversion designs.
- Manufacturer
- Microchip
- Package
- Quad Flat No-Lead
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- MCP19123-E/MQ Datasheet PDF
- Category
- Integrated Circuit
- Price
- From $3.9600(MOQ 1)
- Temp Range
- -40.0°C to 125.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of MCP19123-E/MQ?
- 4.5 V to 40 V wide input voltage range covering automotive and industrial bus voltages
- 3 V to 5 V programmable output via digitally enhanced analog control
- Current-mode PWM control for fast transient response and cycle-by-cycle current limiting
- 28-pin QFN package for compact high-density power converter layouts
- Digitally configurable compensation and protection thresholds via I2C/SPI
- Analog control loop speed combined with digital flexibility for adaptive power designs
- Factory introduction 2017, active production lifecycle with 18-year YTEOL support
What is MCP19123-E/MQ used for?
MCP19123-E/MQ is used in industrial power supplies, telecom equipment, and server point-of-load converters where wide input range from 4.5 V to 40 V must be regulated down to 3.3 V or 5 V output with digitally adjustable compensation and protection thresholds. It is also deployed in automotive infotainment and ADAS power rails where digitally enhanced analog control delivers both the fast loop response of analog PWM and the configurability of a digital power management IC.
What are the specifications of MCP19123-E/MQ?
| Manufacturer Package Code | QFN-28 |
| Factory Lead Time | 7Weeks |
| Date Of Intro | 2017-05-05 |
| YTEOL | 18 |
| Additional Feature | 3V TO 5V REGULATING OUTPUT ALSO AVAILABLE |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 40V |
| Input Voltage-Min | 4.5V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | S-PQCC-N28 |
| JESD-609 Code | e3 |
| Number of Functions | 1 |
| Output Voltage-Max | 16V |
| Output Voltage-Min | 0.3V |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | LCC28,.2SQ,20 |
| Package Shape | SQUARE |
| Package Style | CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE |
| Screening Level | TS 16949 |
| Surface Mount | YES |
| Switcher Configuration | BUCK |
| Switching Frequency-Max | 1600kHz |
| Temperature Grade | AUTOMOTIVE |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | NO LEAD |
| Terminal Pitch | 0.5mm |
| Terminal Position | QUAD |
| Package | Quad Flat No-Lead |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
| Country of Origin | Thailand |
Where can I find the MCP19123-E/MQ datasheet?
MCP19123-E/MQ Datasheet DownloadOfficial datasheet from Microchip
What are equivalent replacements for MCP19123-E/MQ?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What input voltage range does MCP19123-E/MQ support and which industrial bus standards does that cover?
MCP19123-E/MQ operates from 4.5 V to 40 V input, covering 5 V logic, 12 V ATX, 24 V industrial, and 36 V telecom bus standards in a single controller. This wide range eliminates the need for a pre-regulator stage in systems that must accept both 12 V and 24 V input rails from different power sources.
How does the digitally enhanced analog architecture differ from a fully digital controller in terms of loop bandwidth?
MCP19123-E/MQ uses an analog PWM current-mode control loop capable of bandwidths up to 100 kHz, comparable to pure analog controllers, while adding an I2C or SPI digital interface for configuring compensation, soft-start time, and protection thresholds at startup. Fully digital controllers sample the error signal at a fixed clock rate that can limit achievable bandwidth, whereas this hybrid approach retains analog loop speed.
What output voltage range is achievable and how is it set on MCP19123-E/MQ?
MCP19123-E/MQ targets output voltages in the 3 V to 5 V range, set through a combination of external resistor divider and digitally adjustable reference trimming via the serial interface. The 3.3 V and 5 V standard output voltages used in CPU, FPGA, and peripheral supply rails are directly achievable without special external components.
What package does MCP19123-E/MQ use and how does it impact thermal management in high-current designs?
MCP19123-E/MQ comes in a 28-pin QFN package, which includes an exposed thermal pad on the bottom that connects to the PCB ground plane via thermal vias. This allows thermal resistance below 30°C/W with adequate copper pour, enabling continuous operation at full duty cycle in compact converter designs without bulky heatsinks.
Is MCP19123-E/MQ RoHS compliant and what is the expected production lifecycle for multi-year procurement planning?
MCP19123-E/MQ entered production in May 2017 with an 18-year YTEOL designation, indicating Microchip plans to supply the part through at least 2035. It carries RoHS compliant status, making it suitable for designs that must satisfy EU RoHS 3 and similar lead-free directives for long-lifecycle industrial and telecommunications equipment.
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More from Microchip
| Qty. | Unit Price | Ext. Price |
|---|---|---|
| 1+ | $5.9700 | $5.97 |
| 100+ | $4.5200 | $452.00 |
| 511+ | $4.0100 | $2049.11 |
| 1022+ | $4.0000 | $4088.00 |
| 2555+ | $3.9600 | $10117.80 |
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