Monolithic Power Systems Inc. MP86884DQKTE-LF-Z

Overview

MP86884DQKTE-LF-Z from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ solution integrating high-side and low-side power MOSFETs with gate drivers in a single 6×6 mm TQFN package. It delivers 55 A continuous output current, supports 100 kHz–1 MHz switching, operates from 4.5 V–14 V input, and features integrated current sense (±4% accuracy at 30 A), temperature sense (10 mV/°C), and tri-state PWM interface - enabling precise multi-phase core voltage regulation in high-density server VRMs.

For engineers reviewing the MP86884DQKTE-LF-Z datasheet, MP86884DQKTE-LF-Z pinout, MP86884DQKTE-LF-Z application, or MP86884DQKTE-LF-Z equivalent, this page provides verified technical context, validated pin functions, confirmed thermal and electrical specifications, real-world multi-phase implementation details, and direct alternative comparisons for server-grade buck converter design.

Technical Context

The MP86884 operates as a self-contained half-bridge power stage with integrated driver logic, dead-time control (3 ns rising / 8 ns falling), and internal bootstrap switch. Its tri-state PWM interface enables seamless coordination with external multi-phase controllers like MP2935, while synchronous low-side control via SYNC pin supports diode emulation mode for light-load efficiency.

Current sensing uses a 10 µA/A proportional current source on the CS pin, referenced to PGND, with cycle-by-cycle valley-current hold capability. Junction temperature is monitored via VTEMP (−100 mV offset, 10 mV/°C), allowing direct connection to controller ADC inputs for per-phase thermal management in parallel configurations.

Key Specifications

Pinout & Package

MP86884DQKTE-LF-Z is housed in a thermally enhanced 6 mm × 6 mm TQFN package with exposed thermal pad (pins 1–6 and 8–21). The package complies with RoHS6 and JEDEC MO-220 standards, featuring 0.10 mm max lead coplanarity and optimized copper area for SW, IN, and PGND connections.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar half-bridge power stage applications.

Compared with MP86884DQKTE-LF-Z, MP86957 offers wider input range but omits temperature sensing, while ISL99390 packs two stages but increases component count and thermal coupling - making MP86884 optimal for thermally aware, high-current server VRMs requiring per-phase diagnostics.

Availability

MP86884DQKTE-LF-Z is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, and modular AI accelerator power supplies requiring stable component supply, long-lifecycle support, and traceable RoHS6-compliant sourcing.

Supply support for MP86884DQKTE-LF-Z 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

Monolithic Power Systems (MPS) is a fabless semiconductor company specializing in high-performance analog and mixed-signal ICs for power management, with global design centers and ISO 9001-certified operations.

The MP86884 belongs to MPS's Intelli-Phase™ family of monolithic power stages, engineered specifically for high-efficiency, high-density multi-phase buck regulators in datacenter and AI hardware where thermal visibility, current accuracy, and layout simplicity are critical.

FAQ

What is the recommended bootstrap capacitor value for MP86884DQKTE-LF-Z?

The datasheet specifies a 0.22 µF to 1 µF ceramic capacitor between BST and SW pins. A 0.47 µF X7R 16 V capacitor placed within 2 mm of the BST pin is recommended for 600 kHz operation to ensure stable high-side gate drive and minimize voltage droop during duty cycles above 75%.

Can MP86884DQKTE-LF-Z operate without an external current sense resistor?

No. The CS pin is a current source (10 µA/A), requiring an external resistor to ground to convert sensed LSFET current into a measurable voltage. A typical 10 kΩ resistor yields 100 mV/A, compatible with most VR controller sense amplifier inputs. Omitting the resistor disables current monitoring and OCP functionality.

How does the VTEMP pin enable thermal protection in multi-phase systems?

VTEMP outputs a voltage linearly proportional to junction temperature (10 mV/°C − 100 mV offset). In multi-phase setups, each MP86884's VTEMP can be connected to a dedicated ADC channel or summed via resistive averaging, allowing the controller to trigger phase shedding or throttle clock frequency when any phase exceeds 115°C.

Is the EN pin necessary for normal operation?

Yes. EN must be pulled high (≥2 V) after VDDDRV and VIN stabilize to enable switching. Leaving EN floating or low disables the output and places SW in high-impedance state - a required sequencing step during power-up/down to prevent inrush or shoot-through in multi-phase systems.

What happens during overcurrent events on the high-side MOSFET?

When high-side current exceeds 80 A (typical), the device latches off the HS FET and holds SW in high-impedance state. Recovery requires toggling EN or recycling VIN/VDDDRV - ensuring robust fault containment without requiring external circuitry.

Does MP86884DQKTE-LF-Z support phase interleaving out of the box?

It does not generate interleaved timing internally, but its tri-state PWM interface and precise propagation delays (35 ns high-to-SW rise/fall) allow external controllers to implement precise phase offsets. Verified 90° interleaving has been demonstrated with MP2935-based 4-phase VRMs using matched PCB trace lengths.

What is the minimum PWM pulse width supported?

The datasheet guarantees a minimum controllable PWM pulse width of 30 ns. This enables stable operation at 1 MHz switching frequency with ≥3% duty cycle resolution, supporting deep droop and ultra-fast transient response in modern CPU VR applications.