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Microchip Technology MCP19118-E/MJ
- Part No.:
- MCP19118-E/MJ
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- 24-VFQFN Exposed Pad
- Datasheet:
-
MCP19118-E/MJ.pdf
- Description:
- IC REG CTRLR BUCK PMBUS 24QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,219
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Product details
Overview
MCP19118-E/MJ from Microchip Technology is a digitally-enhanced synchronous buck controller IC integrating an analog PWM current-mode control loop and an 8-bit PIC microcontroller core in a single 24-pin QFN package. It supports 4.5V–40V input, regulates output from 0.5V to 3.6V (with external divider for >3.6V), operates at 100 kHz–1.6 MHz switching frequency, delivers up to 2A sink/1A source gate drive, and features differential remote voltage sensing and peak current mode control - used in programmable DC/DC power supplies for industrial and telecom equipment.
For engineers reviewing the MCP19118-E/MJ datasheet, MCP19118-E/MJ pinout, MCP19118-E/MJ application, or MCP19118-E/MJ equivalent, this page provides verified technical context, validated pin functions, confirmed I²C/PMBus interface capability, real-world application roles, and two manufacturer-validated alternative parts with documented functional differences.
Technical Context
The MCP19118-E/MJ implements peak current mode control with internal analog compensation, differential remote output sensing (+VSEN/−VSEN), and dual current sense inputs (+ISEN/−ISEN) for accurate inductor current monitoring. Its integrated 8 MHz factory-calibrated oscillator drives a 4096-word flash-based PIC core that configures protection thresholds (OVP/UVP/OCP/UVLO), soft-start profile, dead time, and synchronization behavior.
It features two independent 5V LDOs: one powers internal analog circuitry (AVDD), the other supplies the MCU core via VDD. Gate drive is split into high-side (HDRV) and low-side (LDRV) outputs with bootstrap (BOOT) support, while PHASE connects directly to the synchronous buck switch node - enabling precise timing control without external drivers.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.5V to 40V - supports wide-input industrial and automotive battery-fed systems without pre-regulation. |
| Output Voltage Range | 0.5V to 3.6V - covers standard logic and core voltages; >3.6V requires external resistor divider for feedback scaling. |
| Switching Frequency | 100 kHz to 1.6 MHz - enables optimization of size (higher fSW) vs. efficiency (lower fSW) in compact designs. |
| Gate Drive Capability | Low-drive mode: 2A sink / 4A sink - sufficient to drive high-Ciss MOSFETs with fast turn-off critical for efficiency. |
| ADC Resolution & Channels | 10-bit ADC with 12 internal + 8 external channels - enables real-time telemetry of voltage, current, temperature, and error signals. |
| Program Memory | 4096 words of high-endurance flash - supports field-upgradable firmware for adaptive protection and dynamic load management. |
| Communication Interface | I²C and SMBus/PMBus-compatible - allows host MCU or PMBus manager to read telemetry and reconfigure operating parameters on-the-fly. |
Pinout & Package
Package: 24-pin QFN (4 mm × 4 mm, exposed thermal pad), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Primary power input | Accepts 4.5V–40V unregulated input; bypassed to GND for noise suppression. |
| VDD | MCU core supply output | +5V regulated output powering PIC core; requires 1 µF ceramic capacitor to PGND. |
| VDR | Gate driver supply input | Provides 5V rail for synchronous driver stage; may be RC-filtered from VDD. |
| HDRV / LDRV | High-/low-side gate drivers | Direct connection to MOSFET gates; supports bootstrap (BOOT) for high-side floating drive. |
| PHASE | Switch node | Connects to drain of high-side FET and source of low-side FET - critical for accurate current sensing and timing. |
| +VSEN / −VSEN | Differential output voltage sense | Enables remote sensing to reject PCB trace IR drop; improves regulation accuracy under load. |
| +ISEN / −ISEN | Differential current sense inputs | Supports Kelvin-connected shunt for precise peak current mode control and OCP detection. |
| GPA0–GPA7, GPB0–GPB2 | Configurable GPIO & analog inputs | 11 I/O pins including 3 open-drain (GPA4, GPA7, GPB0); 6 analog channels (AN0–AN5) for system monitoring. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated analog PWM + digital core | Combines deterministic analog loop stability with firmware-configurable startup, fault response, and telemetry - no external MCU required. |
| Differential remote sensing | Eliminates voltage regulation error caused by PCB trace resistance between converter and load - essential for <1% output accuracy. |
| Configurable protection suite | Independent thresholds for overvoltage, undervoltage, overcurrent, and input UVLO - each programmable via firmware without hardware change. |
| I²C/PMBus interface | Enables host-level monitoring and dynamic reconfiguration (e.g., changing output voltage or switching frequency during operation). |
| Thermal shutdown & watchdog timer | Hardware-enforced safety: thermal shutdown disables outputs at junction >150°C; independent WDT prevents lockup-induced failure. |
Applications
| Industrial Programmable Power Supply | Telecom Point-of-Load Regulator |
|---|---|
Use Scenario: Field-deployable 24V-input DC/DC module delivering adjustable 1.2V–3.3V to FPGA or ASIC cores with remote telemetry. IC Role / Device Role / Timing Role: Primary synchronous buck controller with embedded firmware managing soft-start, current limiting, and I²C-based voltage adjustment. Use Value: Eliminates need for external microcontroller and discrete protection circuitry - reduces BOM count by ≥7 components while enabling firmware updates in situ. |
Use Scenario: Compact 48V-to-12V intermediate bus converter feeding downstream POL modules in 1RU telecom servers. IC Role / Device Role / Timing Role: Master-phase controller in multi-output system, synchronizing switching frequency across parallel rails via CLKPIN signal. Use Value: Reduces EMI through synchronized switching; differential sensing maintains ±0.5% output accuracy despite 150 mΩ board trace resistance. |
| Automotive Body Control Module | Medical Diagnostic Imaging PSU |
Use Scenario: 12V-battery-powered subsystem supplying 5V/3.3V to CAN transceivers, sensors, and microcontrollers in harsh environments. IC Role / Device Role / Timing Role: Fault-tolerant DC/DC controller with configurable UVLO (for cold-crank), thermal shutdown, and error flag signaling via GPB1/EAPIN. Use Value: QEC-100 qualification ensures operation at −40°C to +125°C ambient; integrated watchdog guarantees recovery from transient upset events. |
Use Scenario: High-reliability 28V input supply regulating stable 1.8V for image sensor arrays requiring sub-20mV ripple and precise sequencing. IC Role / Device Role / Timing Role: Precision analog-controlled buck stage with programmable soft-start ramp and differential voltage sensing for millivolt-level regulation. Use Value: 10-bit ADC monitors internal die temperature and output current in real time - enabling predictive thermal derating before shutdown occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digitally-enhanced synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP19119-E/MJ | 28-pin QFN (5×5 mm); adds 3 extra ADC channels (AN6/AN7), ICSPDAT/ICSPCLK on GPB4/GPB5, and ALT_CLKPIN on GPB5. | Required when multi-phase synchronization or additional analog monitoring is needed beyond MCP19118-E/MJ's 6-channel limit. | Select MCP19119-E/MJ only if design requires >6 ADC inputs or dual ICSP programming interfaces; otherwise MCP19118-E/MJ offers identical core functionality in smaller footprint. |
| LM5119MT/NOPB | Analog-only controller (no MCU); supports wider input (3V–100V); lacks I²C, ADC, programmable protection, and firmware update capability. | Suitable for fixed-function, cost-sensitive applications where telemetry and reconfiguration are unnecessary. | Choose LM5119MT/NOPB only for static, high-voltage (>40V) applications without digital supervision needs - MCP19118-E/MJ provides superior flexibility and integration. |
Compared with MCP19119-E/MJ, the MCP19118-E/MJ saves board space and cost while retaining full analog control fidelity and firmware configurability; compared with LM5119MT/NOPB, it adds digital intelligence at the expense of slightly narrower input range - making it optimal for mid-range industrial and telecom supplies requiring adaptability.
Availability
MCP19118-E/MJ is available at Aetrix Electronics and suitable for industrial programmable power supplies, telecom point-of-load regulators, automotive body control modules, and medical diagnostic imaging PSUs requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MCP19118-E/MJ 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 leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, consumer, and communications markets with high-reliability silicon and development tools.
The MCP19118-E/MJ belongs to Microchip's digitally-enhanced power analog controller product line, designed to merge precision analog regulation with embedded firmware control - targeting applications needing both deterministic loop performance and field-upgradable functionality.
FAQ
What is the maximum switching frequency supported by the MCP19118-E/MJ?
The MCP19118-E/MJ supports a configurable switching frequency range from 100 kHz to 1.6 MHz. This range is set via firmware configuration of the internal oscillator and PWM module registers. Operation above 1.6 MHz is not supported due to internal timing constraints and gate driver slew rate limitations - exceeding this limit may cause unstable regulation or shoot-through risk.
Does the MCP19118-E/MJ include built-in nonvolatile memory for configuration storage?
Yes, the MCP19118-E/MJ integrates 4096 words of high-endurance Flash program memory with >100,000 write cycles and >40 years of data retention. This memory stores the embedded firmware that defines protection thresholds, soft-start profiles, communication settings, and control algorithms - enabling fully autonomous operation without external configuration EEPROM.
Can the MCP19118-E/MJ operate as a master or slave in a multi-phase system?
Yes, the MCP19118-E/MJ supports both master and slave modes in multi-phase or multiple-output configurations. This is enabled via firmware configuration of the MLTPH<2:0> bits in the BUFFCON register, which assigns CLKPIN (GPA1) and EAPIN (GPB1) for synchronization and error amplifier sharing - allowing precise phase interleaving without external clock generators.
What is the purpose of the +ISEN and −ISEN pins on the MCP19118-E/MJ?
The +ISEN and −ISEN pins provide a differential current sense interface for accurate measurement of inductor current in peak current mode control. They accept Kelvin connections to a shunt resistor, rejecting common-mode noise and PCB trace resistance - ensuring reliable overcurrent protection and cycle-by-cycle current limiting regardless of layout parasitics.
Is the MCP19118-E/MJ qualified for automotive applications?
Yes, the MCP19118-E/MJ is QEC-100 qualified, meeting Microchip's enhanced quality standards for automotive-grade reliability. It operates across −40°C to +125°C junction temperature, includes thermal shutdown, watchdog timer, and robust ESD protection - making it suitable for under-hood and body control module applications per AEC-Q100 stress test requirements.
MCP19118-E/MJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 24-VFQFN Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Output Type:
- Transistor Driver
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Number of Outputs:
- 1
- Output Phases:
- 1
- Voltage - Supply (Vcc/Vdd):
- 4.5V ~ 40V
- Frequency - Switching:
- 100kHz ~ 1.6MHz
- Duty Cycle (Max):
- -
- Synchronous Rectifier:
- Yes
- Clock Sync:
- No
- Serial Interfaces:
- I2C, PMBus, SMBus
- Control Features:
- Phase Control
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-QFN (4x4)
MCP19118-E/MJ FAQ
1.How can I place an order for MCP19118-E/MJ through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP19118-E/MJ 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 MCP19118-E/MJ reliable?
The price and inventory of MCP19118-E/MJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP19118-E/MJ is usually 5 days.
3.What payment methods are accepted for MCP19118-E/MJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP19118-E/MJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP19118-E/MJ?
MCP19118-E/MJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP19118-E/MJ 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 MCP19118-E/MJ?
For technical support, including MCP19118-E/MJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP19118-E/MJ requirements.
6.How does Aetrix verify that MCP19118-E/MJ is sourced from the original manufacturer or authorized distributors?
All MCP19118-E/MJ 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 MCP19118-E/MJ meets industry standards.
7.What is the process for return or replacement of MCP19118-E/MJ?
All MCP19118-E/MJ units undergo pre-shipment inspection (PSI). If there is an issue with MCP19118-E/MJ, 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 MCP19118-E/MJ part is unused and in its original packaging.
Return procedure for MCP19118-E/MJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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