Monolithic Power Systems Inc. MP8760GL-P

Overview

MP8760GL-P from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter delivering 6A output current with 2.5V–18V input range (external 5V bias) or 4.5V–18V (internal bias), 0.611V–13V adjustable output, and proprietary Constant-On-Time (COT) control for ultrafast transient response in compact 3mm×4mm QFN-13 package. It targets high-density power rails in set-top boxes, small-cell base stations, and flat-panel displays.

For engineers reviewing the MP8760GL-P datasheet, MP8760GL-P pinout, MP8760GL-P application, or MP8760GL-P equivalent, key selection criteria include its non-latch OCP/OVP/thermal shutdown protection, programmable 200kHz–1MHz switching frequency via FREQ pin, 1% reference voltage accuracy over −40°C to +125°C, and pre-bias startup capability for reliable system power sequencing.

Technical Context

The MP8760GL-P implements adaptive COT control without an external oscillator, using input-voltage feed-forward through the FREQ pin to maintain near-constant switching frequency across input variations. Its internal high-side (28 mΩ) and low-side (16 mΩ) MOSFETs enable high-efficiency operation in both CCM and skip-mode DCM.

It integrates a 4.8V internal LDO (VCC), open-drain power-good (PG) with 2.5ms delay and 91% rising threshold, soft-start controlled by external capacitor, and dual-level over-current protection: valley current limit (6.5–8.5A) and negative current limit (−4A to −1A), all implemented with non-latch behavior.

Key Specifications

Pinout & Package

MP8760GL-P is housed in a thermally enhanced 3mm×4mm QFN-13 package with exposed PGND pad for optimal heat dissipation and EMI control. Pin numbering follows standard top-view orientation with pin 1 at top-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP8760GL-P, MP2236 offers superior light-load efficiency and updated thermal design but reduces max output current to 5A, while MPQ8633BGLE adds automotive qualification and telemetry at the expense of analog simplicity and BOM cost.

Availability

MP8760GL-P is available at Aetrix Electronics and suitable for set-top box power management, small-cell base station RFIC supplies, and flat-panel display logic board applications requiring stable component supply and long-term obsolescence planning.

Supply support for MP8760GL-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 MP8760 belongs to MPS's high-current synchronous buck converter product line, engineered for space-constrained, high-efficiency power delivery in consumer, telecom, and industrial equipment where thermal density and transient response are critical.

FAQ

What is the maximum recommended input voltage for MP8760GL-P?

The absolute maximum input voltage is 21V, but the recommended operating range is 4.5V to 18V with internal bias or 2.5V to 18V with external 5V VCC bias. Sustained operation above 18V risks exceeding SOA limits of internal MOSFETs and may trigger overvoltage protection on the VCC LDO.

Can MP8760GL-P start up into a pre-biased output?

Yes-MP8760GL-P supports monotonic pre-bias startup. When the FB voltage exceeds the SS capacitor voltage at power-on, both high-side and low-side switches remain off until the SS voltage rises above the sensed output, preventing reverse current and ensuring controlled ramp-up.

How does the FREQ pin set switching frequency?

The FREQ pin connects via resistor (R_FREQ) to IN, feeding input voltage into a one-shot timer that determines ON-time. Frequency is calculated as f_SW ≈ 6.1 × R_FREQ(kΩ) × V_IN(V) / 10⁶ kHz, with typical range 200kHz–1MHz; line feed-forward maintains stability across VIN variation.

What is the purpose of the AGND and PGND separation?

AGND serves as the quiet reference for feedback, soft-start, and control circuitry; PGND carries high di/dt switch currents. Separating them prevents noise coupling into the FB path, which could cause regulation instability or false OVP triggering-layout best practice requires single-point connection near the IC.

Does MP8760GL-P support external synchronization?

No-MP8760GL-P lacks an external sync input. It relies solely on its internal adaptive COT architecture with resistor-programmed frequency. For synchronized multi-rail systems, designers must use frequency-select resistors to align switching frequencies or select alternatives like MPQ8633BGLE with PMBus clock sync capability.

What is the minimum output voltage achievable with MP8760GL-P?

The minimum regulated output voltage is 0.611V, set by the internal 611 mV reference voltage. This is achieved using a resistor divider where R1 = 0 Ω and R2 is selected to scale FB to exactly V_REF; lower outputs require external reference injection, which is not supported.

How does the power-good (PG) signal behave during undervoltage events?

PG goes low when FB falls below 80% of V_REF (e.g., 489 mV for 0.611V reference) or rises above 120% V_REF, with a 2.5ms delay on rising edge only. During VCC UVLO (<3.4V), PG is actively pulled low regardless of FB state, providing fail-safe indication of regulator disablement.