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Home > Products > Integrated Circuits (ICs) > Power Management (PMIC) > DC DC Switching Controllers

Microchip Technology MCP19118T-E/MJVAO

Name: MCP19118T-E/MJVAO
Brand: Microchip Technology
SKU: MCP19118T-E/MJVAO
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MCP19118T-E/MJVAO

Manufacturer:: Microchip Technology

Category:: DC DC Switching Controllers

Package:: 24-VFQFN Exposed Pad

Datasheet:: MCP19118T-E/MJVAO.pdf

Description:: 40V POINT OF LOAD CONVERTER

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Product details

Overview

MCP19118T-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 DC/DC step-down 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 - used in programmable industrial power supplies requiring adaptive protection and I²C/PMBus host communication.

For engineers reviewing the MCP19118T-E/MJVAO datasheet, MCP19118T-E/MJVAO pinout, MCP19118T-E/MJVAO application, or MCP19118T-E/MJVAO equivalent, key selection criteria include its 24-pin QFN package, 11 GPIO + 1 input-only pin configuration, integrated 10-bit ADC with 12 internal/8 external channels, thermal shutdown, and configurable overcurrent/UVLO/OV/UV protection thresholds.

Technical Context

The MCP19118T-E/MJVAO implements analog PWM regulation with digital supervision: peak current mode control ensures stable loop response, while the embedded PIC16 core enables runtime reconfiguration of soft-start, dead time, compensation, and fault-handling logic via firmware. Its dual 5V rails - one powering analog circuitry (internal), the other supplied on VDD - decouple noise-sensitive functions.

It features differential remote voltage sensing (+VSEN/−VSEN), bidirectional current sensing (+ISEN/−ISEN), and hardware-based synchronous driver outputs (HDRV/LDRV) supporting up to 2A source/2A sink (high-drive) or 2A source/4A sink (low-drive). The device operates as master or slave in multi-output systems with frequency synchronization capability.

Key Specifications

Parameter	Value and Actual Design Meaning
Input Voltage Range	4.5V to 40V - supports wide-input industrial and automotive battery-fed applications without external pre-regulation.
Output Voltage Range	0.5V to 3.6V - programmable via internal DAC; >3.6V requires external resistor divider for feedback scaling.
Switching Frequency	100 kHz to 1.6 MHz - adjustable in real time via firmware; higher frequencies enable smaller magnetics and faster transient response.
Gate Drive Capability	High-drive: ±2A; Low-drive: 2A source / 4A sink - directly drives medium-power MOSFETs without external buffers.
ADC Resolution & Channels	10-bit resolution with 12 internal + 8 external analog inputs - enables comprehensive system monitoring (voltage, current, temperature).
Program Memory	4096-word Flash (14-bit words) with 100,000 write endurance - stores custom startup profiles, protection algorithms, and communication handlers.
Communication Interface	I²C/SMBus/PMBus-compatible - allows host MCU or PMBus manager to read telemetry and modify operating parameters dynamically.

Pinout & Package

Package: 24-pin 4 mm × 4 mm QFN with exposed thermal pad (EP). Pin count and layout match DS20005350A-page 2 pin diagram for MCP19118.

Pin/Terminal	Circuit Role	Design Meaning
VIN	Primary power input	Accepts 4.5V–40V unregulated supply; connects to input capacitor bank and PGND return path.
VDD	+5V LDO output	Powers PIC core and digital peripherals; requires 1 µF bypass to PGND near pin.
VDR	Gate drive supply input	Provides 5V rail for synchronous drivers; may be RC-filtered from VDD or externally regulated.
HDRV / LDRV	High-side / low-side gate drivers	Direct MOSFET gate connection points; HDRV floats with PHASE node; LDRV referenced to PGND.
PHASE	Switch node	Connects to drain of high-side FET and source of low-side FET; critical for bootstrap capacitor charging.
BOOT	Bootstrap supply	Charged via diode/capacitor from PHASE; enables high-side N-channel MOSFET drive.
+VSEN / −VSEN	Differential output voltage sense	Enables accurate remote sensing across PCB traces; rejects common-mode noise in high-current paths.
+ISEN / −ISEN	Differential current sense	Supports bidirectional current measurement using precision shunt resistor; feeds analog comparator and ADC.
GPA0–GPA7, GPB0–GPB2	Configurable GPIO & analog inputs	11 general-purpose I/O pins (3 open-drain); includes 10-bit ADC inputs (AN0–AN5), INT, T0CKI, and debug/test functions.
GND / PGND	Signal / power ground	GND: small-signal reference for analog/digital logic; PGND: high-current return for switch node and drivers - must be separated and joined at single point.

Key Features

Feature	Design Value
Integrated analog PWM + digital core	Combines fast analog loop stability with firmware-defined flexibility for startup sequencing, fault recovery, and telemetry reporting.
Dual 5V LDOs	One powers internal analog blocks (isolated), second supplies VDD for PIC core - reduces external regulator count and improves PSRR.
Configurable protection suite	Runtime-adjustable thresholds for overcurrent, input UVLO, output OV/UV, and thermal shutdown - eliminates hardware redesign for margin tuning.
Multi-output synchronization	Supports master/slave operation with frequency lock via CLKPIN (GPA1) or ALT_CLKPIN (GPB5 on MCP19119 only) - enables phase interleaving in multi-rail systems.
In-circuit programming & debug	ICSP™ via GPA6/GPA7 (MCP19118) enables field firmware updates; I²C interface allows host-initiated parameter changes without reprogramming.

Applications

Industrial Programmable Power Supply	Automotive Body Control Module (BCM)
Use Scenario: A 12V–36V input programmable DC power supply delivering 3.3V/5V/12V outputs with dynamic load adjustment and telemetry logging. IC Role / Device Role / Timing Role: Primary synchronous buck controller managing output regulation, current limiting, and I²C-based host communication for setpoint updates and fault reporting. Use Value: Eliminates need for separate MCU + analog controller; firmware enables custom soft-start, brown-out recovery, and PMBus-compliant telemetry without additional components.	Use Scenario: Power management for automotive BCM subsystems requiring multiple regulated rails (e.g., 5V for microcontroller, 3.3V for sensors) with robust fault handling. IC Role / Device Role / Timing Role: Digitally enhanced buck controller providing isolated, synchronized outputs with configurable UV/OV thresholds meeting AEC-Q100 stress requirements. Use Value: Integrated thermal shutdown and differential current sensing enable reliable operation under engine-bay temperature extremes and load dump conditions.
Telecom Remote Radio Unit (RRU)	Programmable LED Driver Platform
Use Scenario: Compact, thermally constrained RRU power stage converting 48V backplane to 5V/3.3V rails with remote monitoring and dynamic efficiency optimization. IC Role / Device Role / Timing Role: Synchronous buck controller executing real-time efficiency tuning via ADC-measured load current and ambient temperature feedback. Use Value: On-chip 10-bit ADC and programmable dead time allow adaptive light-load efficiency improvement without external sensor or timing IC.	Use Scenario: Constant-current LED driver platform supporting variable forward voltage strings (e.g., 2–10 LEDs) with dimming control and thermal derating. IC Role / Device Role / Timing Role: Buck controller implementing current-mode regulation with differential ISEN inputs and firmware-based thermal foldback algorithm. Use Value: Integrated current sense amplifier and programmable overtemperature response eliminate discrete op-amps and thermal ICs, reducing BOM cost and board area.

Industrial Programmable Power Supply

Automotive Body Control Module (BCM)

Use Scenario: A 12V–36V input programmable DC power supply delivering 3.3V/5V/12V outputs with dynamic load adjustment and telemetry logging.

IC Role / Device Role / Timing Role: Primary synchronous buck controller managing output regulation, current limiting, and I²C-based host communication for setpoint updates and fault reporting.

Use Value: Eliminates need for separate MCU + analog controller; firmware enables custom soft-start, brown-out recovery, and PMBus-compliant telemetry without additional components.

Use Scenario: Power management for automotive BCM subsystems requiring multiple regulated rails (e.g., 5V for microcontroller, 3.3V for sensors) with robust fault handling.

IC Role / Device Role / Timing Role: Digitally enhanced buck controller providing isolated, synchronized outputs with configurable UV/OV thresholds meeting AEC-Q100 stress requirements.

Use Value: Integrated thermal shutdown and differential current sensing enable reliable operation under engine-bay temperature extremes and load dump conditions.

Telecom Remote Radio Unit (RRU)

Programmable LED Driver Platform

Use Scenario: Compact, thermally constrained RRU power stage converting 48V backplane to 5V/3.3V rails with remote monitoring and dynamic efficiency optimization.

IC Role / Device Role / Timing Role: Synchronous buck controller executing real-time efficiency tuning via ADC-measured load current and ambient temperature feedback.

Use Value: On-chip 10-bit ADC and programmable dead time allow adaptive light-load efficiency improvement without external sensor or timing IC.

Use Scenario: Constant-current LED driver platform supporting variable forward voltage strings (e.g., 2–10 LEDs) with dimming control and thermal derating.

IC Role / Device Role / Timing Role: Buck controller implementing current-mode regulation with differential ISEN inputs and firmware-based thermal foldback algorithm.

Use Value: Integrated current sense amplifier and programmable overtemperature response eliminate discrete op-amps and thermal ICs, reducing BOM cost and board area.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
MCP19119T-E/MJVAO	28-pin QFN; adds GPB4–GPB7, AN6/AN7, ICSPDAT/ICSPCLK on GPB4/GPB5 - increases GPIO count and ADC channels.	Required when >11 GPIO or >6 ADC inputs needed; supports more complex multi-rail coordination or sensor-rich designs.	Select MCP19119T-E/MJVAO if additional analog inputs, serial programming pins, or alternate sync clock (ALT_CLKPIN) are required.
LM5119QMH/NOPB	Analog-only controller (no MCU); supports 6V–100V input; no integrated ADC, Flash, or I²C - requires external MCU for digital features.	Suitable for fixed-function, high-voltage (>40V) applications where firmware customization is unnecessary.	Choose LM5119QMH/NOPB only when digital programmability is not required and input exceeds 40V.

Compared with MCP19119T-E/MJVAO, the MCP19118T-E/MJVAO offers identical analog control performance and firmware capability in a smaller 24-pin footprint but fewer GPIO and ADC resources; versus LM5119QMH/NOPB, it trades off high-voltage tolerance for full digital integration, enabling self-contained power management without external microcontroller dependency.

Availability

MCP19118T-E/MJVAO is available at Aetrix Electronics and suitable for industrial programmable power supplies, automotive body control modules, telecom remote radio units, and programmable LED driver platforms requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for MCP19118T-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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and connectivity solutions for industrial, automotive, and consumer markets.

The MCP19118T-E/MJVAO belongs to Microchip's digitally enhanced power analog controller product line, designed to replace discrete analog controllers + MCUs in mid-power DC/DC applications with integrated firmware-configurable regulation, protection, and communication.

FAQ

What is the package type and pin count of the MCP19118T-E/MJVAO?

The MCP19118T-E/MJVAO uses a 24-pin 4 mm × 4 mm QFN package with exposed thermal pad (EP), as confirmed in DS20005350A-page 2 and Table 1. This matches the MCP19118 variant - distinct from the 28-pin QFN used by the MCP19119T-E/MJVAO. Pin assignments are fully documented in the "24-Pin Summary" table on DS20005350A-page 3.

Does the MCP19118T-E/MJVAO support I²C or PMBus communication?

Yes, the MCP19118T-E/MJVAO supports I²C, SMBus, and PMBus-compatible communication via GPB0 (SDA) and GPA7 (SCL) pins. Firmware enables host-read telemetry (voltage, current, temperature) and host-write configuration (output voltage, protection thresholds, soft-start time), as specified in Section 27.0 of DS20005350A.

How many ADC channels does the MCP19118T-E/MJVAO provide?

The MCP19118T-E/MJVAO integrates a 10-bit ADC with 12 internal channels and 8 external channels, accessible through GPA0–GPA3, GPB1, and GPB2 (AN0–AN5). External channel expansion beyond AN5 is not supported on this variant - unlike the MCP19119T-E/MJVAO which adds AN6/AN7 via GPB4/GPB5.

What are the gate drive specifications for the MCP19118T-E/MJVAO?

The MCP19118T-E/MJVAO provides two gate drive modes: high-drive (±2A) and low-drive (2A source / 4A sink), both at +5V. These are delivered on HDRV and LDRV pins, with BOOT supplying the floating voltage for high-side drive. Drive strength is selected in firmware and verified in DS20005350A-page 1.

Can the MCP19118T-E/MJVAO operate as a master or slave in multi-output systems?

Yes, the MCP19118T-E/MJVAO supports master/slave configuration in multiple output or multi-phase systems using GPA1 (CLKPIN) for synchronization. Configuration is controlled via MLTPH<2:0> bits in the BUFFCON register, as detailed in Sections 3.10.6 and 3.10.7 of DS20005350A - enabling frequency locking and phase alignment across parallel converters.

MCP19118T-E/MJVAO Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 24-VFQFN Exposed Pad

Packaging:: Tape & Reel (TR)

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)

MCP19118T-E/MJVAO FAQ

1.How can I place an order for MCP19118T-E/MJVAO through Aetrix?

Please submit a Request for Quotation (RFQ) for MCP19118T-E/MJVAO 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 MCP19118T-E/MJVAO reliable?

The price and inventory of MCP19118T-E/MJVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP19118T-E/MJVAO is usually 5 days.

3.What payment methods are accepted for MCP19118T-E/MJVAO?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP19118T-E/MJVAO transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MCP19118T-E/MJVAO?

MCP19118T-E/MJVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MCP19118T-E/MJVAO 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 MCP19118T-E/MJVAO?

For technical support, including MCP19118T-E/MJVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP19118T-E/MJVAO requirements.

6.How does Aetrix verify that MCP19118T-E/MJVAO is sourced from the original manufacturer or authorized distributors?

All MCP19118T-E/MJVAO 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 MCP19118T-E/MJVAO meets industry standards.

7.What is the process for return or replacement of MCP19118T-E/MJVAO?

All MCP19118T-E/MJVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP19118T-E/MJVAO, 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 MCP19118T-E/MJVAO part is unused and in its original packaging.

Return procedure for MCP19118T-E/MJVAO:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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