Monolithic Power Systems Inc. MP8762GLE-P

Overview

MP8762GLE-P from Monolithic Power Systems is a fully integrated synchronous step-down DC/DC converter delivering 10A 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 (COT) control. It integrates high-side (21mΩ) and low-side (7mΩ) MOSFETs, supports pre-bias startup, and provides open-drain power-good signaling - deployed in flat-panel TVs and small-cell base stations.

For engineers reviewing the MP8762GLE-P datasheet, MP8762GLE-P pinout, MP8762GLE-P application, or MP8762GLE-P equivalent, key selection considerations include its adaptive COT transient response, non-latch OCP/OVP/thermal shutdown protection, soft-start programmability via external capacitor, and QFN-16 (3×4mm) package with validated 16-pin terminal mapping for layout-critical power delivery.

Technical Context

The MP8762GLE-P implements adaptive Constant-On-Time (COT) control with feed-forward compensation, enabling near-constant switching frequency across input voltage variation and ultrafast load transient response without external loop compensation. Its internal architecture integrates dual N-channel MOSFETs, a 4.8V VCC LDO (bypassable with external 5V bias), and a dedicated current-modulator for DCM operation.

It operates in PWM mode under continuous conduction (CCM) and transitions to skip-mode DCM at light loads, improving efficiency down to no-load conditions. Protection logic includes cycle-by-cycle high-side peak current limit (17.3A), low-side valley current limit (9.5–12.5A), negative current limit (–4A to –1A), and 127% VFB latch-overvoltage threshold with 2µs delay.

Key Specifications

Pinout & Package

MP8762GLE-P is housed in a thermally enhanced QFN-16 (3mm × 4mm, 0.5mm pitch) package with exposed thermal pad. Pin assignment follows MPS-recommended 16-pin layout (not the legacy 13-pin variant), supporting optimal PCB thermal and EMI performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP8762GLE-P, MP8771 offers superior efficiency and broader input range but requires layout revision; RT7276BGJ8F trades flexibility and feature depth for lower BOM count and cost in fixed-frequency 8A applications.

Availability

MP8762GLE-P is available at Aetrix Electronics and suitable for flat panel television, small-cell base station, and personal video recorder designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP8762GLE-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP8762 belongs to MPS's high-current synchronous buck converter product line, engineered for space-constrained, high-efficiency POL applications in consumer, telecom, and industrial equipment where thermal performance and transient response are critical.

FAQ

What is the maximum allowable input voltage for MP8762GLE-P?

The absolute maximum input voltage is 21V, but the recommended operating range is 4.5V–18V with internal VCC bias or 2.5V–18V when externally biased with 5V. Exceeding 21V risks permanent damage to the IN, SW, and BST pins per Absolute Maximum Ratings.

Can MP8762GLE-P operate without an external soft-start capacitor?

No - the SS pin requires an external capacitor to control startup ramp rate. Omitting it causes uncontrolled inrush current, potential current-limit triggering, and possible damage to input capacitors or the IC itself. Typical values range from 1nF to 100nF depending on desired ramp time.

How does the MP8762GLE-P handle pre-biased outputs during startup?

It monitors the FB voltage versus the rising SS capacitor voltage. If V_FB > V_SS at enable, both MOSFETs remain off until V_SS exceeds V_FB, then normal COT regulation begins - ensuring zero reverse current and monotonic output rise even into a pre-charged rail.

Is the PG pin compatible with 3.3V logic systems?

Yes - the PG pin is open-drain and requires an external pull-up to any voltage ≤5.5V (e.g., 3.3V). When asserted, it sinks ≥4mA at 0.4V; leakage is <100nA when high. This allows direct interfacing with 3.3V microcontrollers or CPLDs without level-shifting.

What thermal considerations apply to the QFN-16 (3×4mm) package?

The package has θ_JA = 46°C/W and θ_JC = 9°C/W on a 4-layer JEDEC PCB. For 10A operation at 12V_IN/1V_OUT, junction temperature rise is ~35°C above ambient - requiring adequate copper area, thermal vias under the exposed pad, and airflow or heatsinking if ambient exceeds 85°C.

Does MP8762GLE-P support forced PWM mode?

No - it operates exclusively in auto-mode: PWM (CCM) at heavy loads and skip-mode (DCM) at light loads. There is no pin or register to force continuous switching; efficiency optimization relies on natural mode transition based on inductor current zero-crossing detection.

Why is the 16-pin QFN package recommended over the 13-pin variant?

The 16-pin version adds dedicated AGND and additional PGND pins, improves thermal resistance by 12%, reduces switching noise coupling into feedback paths, and supports higher reliability in high-current layouts - all validated in MPS application notes and layout guidelines.