Monolithic Power Systems Inc. MP8763GLE-P

Overview

MP8763GLE-P from Monolithic Power Systems is a fully-integrated, synchronous step-down DC/DC converter delivering 12A output current with 2.5V–18V input range (external 5V bias) or 4.5V–18V (internal bias), 0.611V–13V adjustable output, and programmable 200kHz–1MHz switching frequency using Constant-On-Time control. It integrates high- and low-side MOSFETs with R_DS(ON) of 19.6mΩ/5.2mΩ and features non-latch OCP/OVP, thermal shutdown, and power-good signaling - deployed in flat-panel TVs and small-cell base stations.

For engineers reviewing the MP8763GLE-P datasheet, MP8763GLE-P pinout, MP8763GLE-P application, or MP8763GLE-P equivalent, key selection considerations include its adaptive COT transient response, pre-bias start-up capability, soft-start programmability via external capacitor, and QFN-16 (3mm×4mm) package thermal performance with θ_JA = 46°C/W.

Technical Context

The MP8763GLE-P implements adaptive Constant-On-Time (COT) control without an oscillator, deriving ON-time from input voltage feed-forward via the FREQ pin and a resistor to VIN. This maintains near-constant switching frequency across input variation while enabling ultrafast load transient response through direct V_FB-to-V_REF comparison triggering.

It operates in PWM mode under continuous conduction (CCM) and transitions to skip mode in discontinuous conduction (DCM) for improved light-load efficiency. Protection includes valley-current OCP (12–18A), negative-current limiting (−4A to −1A), 120% non-latch OVP, and thermal shutdown at 150°C with 25°C hysteresis.

Key Specifications

Pinout & Package

MP8763GLE-P is housed in a thermally enhanced 16-pin QFN package (3mm × 4mm, 0.5mm pitch), optimized for new designs with exposed thermal pad (PGND-connected) and optimized copper layout per MPS layout guidelines.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with MP8763GLE-P, MPQ8763GLE-AEC1 adds automotive qualification at no electrical trade-off, while RTQ2132BGQW sacrifices COT responsiveness and pre-bias capability for simplified compensation - making MP8763GLE-P optimal for high-dynamic-load embedded systems requiring robust startup behavior.

Availability

MP8763GLE-P is available at Aetrix Electronics and suitable for flat-panel televisions, small-cell base stations, and distributed power systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP8763GLE-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 analog and power ICs, with over two decades of leadership in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP8763 belongs to MPS's high-current monolithic buck converter product line, engineered for space-constrained, high-efficiency applications in consumer, telecom, and industrial equipment where integration, thermal performance, and transient response are critical.

FAQ

What is the minimum recommended input voltage for MP8763GLE-P with internal bias?

The MP8763GLE-P requires a minimum 4.5V input when using internal bias (VCC LDO enabled). Below this, the internal 4.8V regulator cannot sustain proper gate drive and control circuit operation. External 5V bias allows operation down to 2.5V input, but VCC must be supplied externally and decoupled with ≥1µF ceramic capacitance.

How does the MP8763GLE-P handle pre-biased outputs during startup?

When the FB pin senses a pre-biased output voltage at EN assertion, the MP8763GLE-P disables both high-side and low-side MOSFETs until the SS capacitor voltage exceeds the sensed FB voltage. This prevents reverse current flow and ensures monotonic, controlled ramp-up - critical for hot-swap and redundant power architectures.

Can the switching frequency be synchronized to an external clock?

No. The MP8763GLE-P uses adaptive Constant-On-Time control without an external sync input. Frequency is set solely by the resistor on the FREQ pin and input voltage feed-forward. For synchronizable alternatives, consider MPS's MPQ4470 or RTQ2132BGQW, which support external clock injection.

What is the maximum allowable thermal pad copper area for the QFN-16 package?

MPS recommends a minimum 12mm² exposed thermal pad connected to a solid PGND plane with ≥6 thermal vias (0.3mm diameter, spaced ≤1mm apart). Larger copper areas improve θ_JA but must avoid violating solder mask clearance rules; typical production layouts use 16–20mm² with 8–10 vias for optimal 12A thermal performance.

Does the MP8763GLE-P support output discharge during shutdown?

No. The MP8763GLE-P does not integrate an active output discharge FET. During shutdown, the output discharges only through the feedback divider and load leakage paths. For controlled discharge, add an external NMOS between VOUT and PGND, driven by EN or PG signal with appropriate timing logic.

What is the purpose of the BST capacitor, and what value is recommended?

The BST capacitor (0.1µF X7R ceramic, rated ≥16V) forms a floating supply for the high-side gate driver. It charges from VCC during low-side conduction and powers the HS-FET gate during ON-time. Placement must be within 2mm of BST/SW pins with short, wide traces to minimize ringing and ensure reliable high-side turn-on at 12A.

How is over-current protection triggered and recovered?

OCP triggers on low-side valley current exceeding 12–18A or negative current below −4A to −1A. Recovery occurs in hiccup mode: the IC disables switching, discharges the SS capacitor, and retries soft-start after a brief delay. This non-latch behavior prevents permanent shutdown during temporary overload or inrush events.