Monolithic Power Systems Inc. MP8764GLE-P

Overview

MP8764GLE-P from Monolithic Power Systems is a high-efficiency, 12A synchronous step-down DC/DC converter with latch-off over-current protection (OCP), operating from 4.5V–18V input and delivering adjustable output from 0.611V to 13V. It integrates high- and low-side MOSFETs (R_DS(ON) = 21 mΩ / 7 mΩ), uses adaptive Constant-On-Time (COT) control for ultrafast transient response, and supports programmable switching frequency (200 kHz–1 MHz) via external resistor on FREQ pin. Used in flat-panel TV power rails and small-cell base station intermediate bus conversion.

For engineers reviewing the MP8764GLE-P datasheet, MP8764GLE-P pinout, MP8764GLE-P application, or MP8764GLE-P equivalent, key selection criteria include latch-off OCP behavior, 12A continuous output capability at +125°C junction, COT-based light-load efficiency in skip mode, and QFN-16 (3×4 mm) thermal performance with θ_JA = 46°C/W.

Technical Context

The MP8764 employs adaptive COT control without an internal oscillator-switching frequency is set by feed-forward compensation through the FREQ pin and remains stable across input voltage variation. Its dual current-limit architecture includes high-side peak, low-side valley (12 A), and low-side negative (–2.5 A) thresholds, with latch-off activation after 180 µs of sustained overcurrent or V_FB < 300 mV during fault.

Internal 4.8 V LDO powers control circuitry (VCC UVLO = 3.9 V, hysteresis = 600 mV); soft-start is capacitor-programmable via SS pin (20 µA charging current); and power-good (PG) provides open-drain status with 97% rising/90% falling thresholds and 2.5 ms delay. Pre-bias startup ensures monotonic ramp into pre-charged outputs.

Key Specifications

Pinout & Package

MP8764GLE-P is housed in a thermally enhanced 16-pin QFN package (3 mm × 4 mm, 0.5 mm pitch) with exposed thermal pad. The package supports high-current routing via multiple PGND and IN pins and enables compact layout with minimal trace inductance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MPQ8764GL-A, the MP8764GLE-P offers lower cost and standard industrial qualification, while RTQ2132BGQW trades latch-off safety for digital configurability-making MP8764GLE-P optimal for cost-constrained, safety-critical embedded power where analog reliability is prioritized.

Availability

MP8764GLE-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, full production traceability, and long-term lifecycle support.

Supply support for MP8764GLE-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.

The MP8764 belongs to MPS's high-current synchronous buck converter product line, engineered for space-constrained, thermally demanding applications such as consumer displays and telecom infrastructure where efficiency, reliability, and fast transient response are critical.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP8764GLE-P requires ≥22 µF total output capacitance with low-ESR ceramic or POSCAP types. For ceramic caps, external ramp compensation (R4/C4 network) is mandatory to ensure PWM-mode stability; for POSCAPs, ESR ≥ 7 mΩ is recommended per Equation 4 in the datasheet to avoid subharmonic oscillation.

Does MP8764GLE-P support forced continuous conduction mode (FCCM)?

No-MP8764GLE-P operates exclusively in adaptive COT mode with automatic transition between CCM and DCM (skip mode). It lacks a MODE pin or external control to force FCCM; light-load efficiency is optimized via natural frequency reduction and valley-current limiting rather than fixed-frequency operation.

How is latch-off OCP reset after triggering?

Latch-off OCP resets only upon removal and reapplication of input voltage or toggling the EN pin low then high. There is no internal auto-reset timer or retry mechanism-this ensures fault conditions are fully addressed before resuming operation, critical for system-level safety compliance.

Can the MP8764GLE-P operate with 2.5 V input?

Yes-but only with external 5 V bias applied to VCC pin. In this configuration, the internal LDO is disabled, allowing VIN as low as 2.5 V. Without external bias, minimum VIN is 4.5 V due to internal VCC generation requirements.

What is the maximum allowable BST capacitor voltage rating?

The BST capacitor must withstand up to V_IN + 6 V (per Absolute Maximum Ratings), so for 18 V max input, a 35 V rated 0.1 µF X7R ceramic capacitor is recommended. Derating by ≥20% ensures reliability under voltage transients and temperature drift.

Is the PG signal active-high or active-low by default?

PG is an open-drain output and is active-low by default-pulled low when V_OUT is within 97%–120% of target, and high-impedance (requiring external pull-up) when valid. It asserts low again if V_FB falls below 90% or exceeds 120%, enabling simple power sequencing with external logic.