Monolithic Power Systems Inc. MP86936GRJT-P

Overview

MP86936GRJT-P from Monolithic Power Systems is a monolithic half-bridge Intelli-Phase™ power stage integrating high-side and low-side MOSFETs, gate drivers, Accu-Sense™ current sensing, and junction temperature monitoring. It delivers 60A continuous output current with 3V–16V input range, operates up to 3MHz switching frequency, and uses tri-state PWM control-designed for server core voltage regulation where compact size and thermal efficiency are critical.

For engineers reviewing the MP86936GRJT-P datasheet, MP86936GRJT-P pinout, MP86936GRJT-P application, or MP86936GRJT-P equivalent, key selection criteria include its integrated 60A half-bridge topology, 2ns/6ns dead-time control, ±2% CS gain accuracy, 10mV/°C temperature-sense linearity, and fault reporting via VTEMP/FLT pin-critical for multi-phase VR14/VR15 server buck converters.

Technical Context

The MP86936 implements a monolithic half-bridge architecture with co-packaged HS/LS silicon and driver logic, eliminating discrete gate-drive loop inductance. Its tri-state PWM interface enables diode emulation and zero-current detection (ZCD), while internal current-limit protection triggers after four consecutive overcurrent cycles at 90A HS limit or -30A LS limit.

Thermal management is enabled by dual-function VTEMP/FLT pin: provides linear 10mV/°C analog temperature output (150mV offset at 25°C) and active-high fault flag (3.0–3.3V) for OC, OTP (>160°C), or SW–PGND short events-each signaled by distinct PWM pin resistance states (10kΩ, 20kΩ, or 1kΩ).

Key Specifications

Pinout & Package

TQFN-23 (3mm × 6mm) package with exposed thermal pad; MSL Level 1 per JEDEC MO-220; optimized for high-current PCB layouts with multiple VIN/PGND vias and minimal BST trace inductance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP86936GRJT-P, MP86933GRJT-P trades 20A current capacity for lower cost and slightly better thermal performance, while ISL99390HRZ-T adds package size and external component overhead to achieve comparable current rating without integrated sensing or intelligent fault signaling.

Availability

MP86936GRJT-P is available at Aetrix Electronics and suitable for server core voltage regulation, GPU power delivery, and AI accelerator power modules requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MP86936GRJT-P 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 power management ICs, with design centers in the US, China, and Taiwan and global manufacturing partnerships.

The MP86936 belongs to MPS's Intelli-Phase™ family-engineered specifically for high-efficiency, high-current DC/DC power stages in datacenter and AI compute applications where integration, thermal performance, and intelligent telemetry are essential.

FAQ

What is the recommended bootstrap capacitor value for MP86936GRJT-P?

The MP86936GRJT-P requires a 0.1µF to 0.22µF ceramic capacitor between BST and SW pins. A 0.1µF X7R 0402 capacitor placed directly adjacent to the BST and SW pins-without vias-is optimal for minimizing AC impedance and ensuring reliable HS gate drive under 3MHz switching.

How does the MP86936GRJT-P handle over-temperature events?

When junction temperature exceeds 160°C, the MP86936GRJT-P triggers over-temperature protection (OTP), latching off the HS-FET and pulling VTEMP/FLT to 3.0–3.3V. The PWM pin simultaneously configures as a 20kΩ resistor to AGND to signal OTP-requiring VIN/VDD power recycle to reset the latch.

Can MP86936GRJT-P operate without an external 3.3V supply?

No. The MP86936GRJT-P requires an external 3.0–3.6V supply connected to both VDRV and VDD pins. VDRV powers the gate drivers, and VDD supplies internal logic; they are not internally regulated and must be supplied externally with proper decoupling (1µF ceramic for VDRV, 1µF + 2.2Ω RC filter for VDD).

What is the minimum PWM pulse width supported by MP86936GRJT-P?

The MP86936GRJT-P supports a minimum PWM pulse width of 30ns, enabling stable operation at switching frequencies up to 3MHz. This specification is guaranteed by characterization and ensures reliable HS-FET turn-on even under extreme duty-cycle conditions in high-frequency VRMs.

How is current sensing implemented on the CS pin?

The CS pin outputs a bidirectional current source proportional to inductor current (8.5µA/A), with ±2% gain accuracy from 20A to 60A. An external resistor converts this to voltage (VCS = I_L × 8.5µA/A × R_CS), constrained to 0.7–2.1V range for valid reporting-used by controllers for OCP, phase balancing, and AVP.

Does MP86936GRJT-P support multi-phase synchronization?

Yes. The SYNC pin enables inter-phase coordination: tying SYNC pins together across multiple MP86936GRJT-P units synchronizes switching and allows shared VTEMP/FLT fault reporting. Diode emulation and standby modes are also synchronized when SYNC is driven identically across all phases.

What PCB layout practices are critical for thermal performance?

Key practices include placing ≥8 thermal vias under the exposed PGND pad, routing VIN/PGND traces with ≥20-mil width, locating input MLCCs within 2mm of VIN/PGND pins, and connecting AGND to PGND only at the VDD decoupling capacitor-verified to reduce θJB to 1.8°C/W in reference designs.