Microchip Technology MCP19118-E/MJVAO

Overview

MCP19118-E/MJVAO from Microchip Technology is a digitally-enhanced synchronous buck controller IC integrating an 8-bit PIC microcontroller core, dual 5V LDOs, and high-current gate drivers for high-efficiency DC/DC conversion. It supports 4.5V–40V input, 0.5V–3.6V output (with external divider >3.6V), 100 kHz–1.6 MHz switching frequency, and peak current mode control - deployed in industrial power supplies requiring programmable protection and PMBus/I²C configurability.

For engineers reviewing the MCP19118-E/MJVAO datasheet, MCP19118-E/MJVAO pinout, MCP19118-E/MJVAO application, or MCP19118-E/MJVAO equivalent, key selection considerations include its 24-pin QFN (4 mm × 4 mm) package, 11 I/O pins with three open-drain outputs, integrated 10-bit ADC with 12 internal + 8 external channels, and dual-role synchronization capability (master/slave) for multi-output systems.

Technical Context

The MCP19118-E/MJVAO implements analog PWM regulation with digital supervision: its peak current mode control loop operates independently of firmware, while the embedded PIC core configures protection thresholds (OVP/UVP/OCP), soft-start profile, dead time, and thermal shutdown behavior via flash memory. The device uses differential remote voltage sensing (+VSEN/−VSEN) and bidirectional current sensing (+ISEN/−ISEN) to maintain tight output regulation under dynamic load conditions.

It features two independent 5V rails: VDD powers the MCU core and digital peripherals (1 µF bypass required), while VDR supplies the synchronous gate drivers. The 24-pin QFN exposes dedicated high-current terminals (HDRV, LDRV, PHASE, BOOT, PGND) and isolated signal ground (GND), enabling clean separation between power and control domains in high-noise buck topologies.

Key Specifications

Pinout & Package

Package: 24-pin QFN (4 mm × 4 mm, exposed thermal pad), RoHS-compliant, moisture-sensitive level 3.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar digitally enhanced buck controller applications.

Compared with MCP19119-E/MJ, the MCP19118-E/MJVAO offers identical analog control performance and firmware compatibility but in a smaller 24-pin QFN with fewer I/O resources; versus LM5119MT/NOPB, it trades external component count for integrated intelligence and configurability - reducing design cycle time at modest unit cost premium.

Availability

MCP19118-E/MJVAO is available at Aetrix Electronics and suitable for industrial power supplies, telecom intermediate bus converters, programmable lab supplies, and automotive infotainment DC/DC modules requiring stable component supply, long-term lifecycle assurance, and full traceability.

Supply support for MCP19118-E/MJVAO 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 Inc. is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving industrial, automotive, communications, and consumer markets with high-reliability silicon and development tools.

The MCP19118-E/MJVAO belongs to Microchip's digitally-enhanced power analog controller product line, designed to bridge analog power efficiency with digital configurability - targeting engineers who require both precision regulation and runtime adaptability in compact DC/DC systems.

FAQ

What is the package type and pin count of the MCP19118-E/MJVAO?

The MCP19118-E/MJVAO is housed in a 24-pin QFN package measuring 4 mm × 4 mm with an exposed thermal pad. It contains 11 configurable I/O pins (including three open-drain outputs), two dedicated I²C pins (GPA7/SCL and GPB0/SDA), and dedicated power/ground terminals (VIN, VDD, VDR, GND, PGND) optimized for synchronous buck layout. This differs from the 28-pin MCP19119 variant.

Does the MCP19118-E/MJVAO support I²C or PMBus communication?

Yes, the MCP19118-E/MJVAO supports full I²C, SMBus, and PMBus-compatible communication using GPA7 as SCL and GPB0 as SDA. It implements 7-bit addressing with dual address registers, enabling host systems to read telemetry (VIN, VOUT, IOUT, temperature) and reconfigure operating parameters including OVP, UVP, soft-start time, and switching frequency - all without interrupting regulation.

How many ADC channels does the MCP19118-E/MJVAO provide, and what is their resolution?

The MCP19118-E/MJVAO integrates a 10-bit successive-approximation ADC with 12 internal channels (e.g., internal temperature, VDD, reference voltages) and 8 external channels accessible via GPA0–GPA3, GPB1, GPB2, and dedicated analog pins. All channels share the same 10-bit resolution and are sampled under firmware control - supporting real-time monitoring of input voltage, output voltage, current sense, and thermal conditions.

Can the MCP19118-E/MJVAO operate as a master or slave in multi-phase configurations?

Yes, the MCP19118-E/MJVAO supports both master and slave modes in multi-output or multi-phase systems using the CLKPIN function on GPA1. When configured as master, it generates a synchronized clock signal; as slave, it locks its switching frequency to an external clock. This capability enables precise phase alignment across multiple buck stages - critical for reducing input/output ripple and improving thermal distribution.

What is the maximum switching frequency supported by the MCP19118-E/MJVAO?

The MCP19118-E/MJVAO supports a configurable switching frequency range from 100 kHz to 1.6 MHz. This range is set via firmware or configuration registers and remains stable across temperature and line/load variations. Higher frequencies allow smaller magnetics and output capacitors, while lower frequencies improve light-load efficiency - giving designers flexibility to optimize for size, cost, or efficiency.