Monolithic Power Systems Inc. MP8760GLE-P

Overview

MP8760GLE-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 programmable 200kHz–1MHz switching frequency. It employs Constant-On-Time (COT) control for ultrafast transient response and integrates high- and low-side MOSFETs with 28mΩ/16mΩ R_DS(ON) in a 3mm×4mm QFN-16 package-used in flat-panel displays and small-cell base stations.

For engineers reviewing the MP8760GLE-P datasheet, MP8760GLE-P pinout, MP8760GLE-P application, or MP8760GLE-P equivalent, key selection considerations include its adaptive COT architecture, non-latch OCP/OVP/thermal shutdown, pre-bias startup capability, and soft-start programmability via external capacitor-critical for stable power sequencing in distributed systems and consumer electronics.

Technical Context

The MP8760GLE-P implements adaptive Constant-On-Time (COT) control without an external oscillator, using input voltage feed-forward via the FREQ pin to maintain near-constant switching frequency across input variations. Its internal 4.8V VCC LDO powers gate drivers and control logic, while external 5V bias disables the LDO to extend VIN down to 2.5V.

It features dual over-current protection: valley-current limiting (6.5–8.5A) during light-to-moderate overload and negative-current limiting (−4A to −1A) to prevent reverse inductor conduction. Power-good signaling uses open-drain PG with 2.5ms delay, 91% rising threshold, and 80% falling threshold relative to V_REF.

Key Specifications

Pinout & Package

MP8760GLE-P is housed in a thermally enhanced 3mm × 4mm QFN-16 package with exposed thermal pad (PGND-connected). Pin numbering follows JEDEC MO-220, top-view orientation with pin 1 at bottom-left corner.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2236DJ-LF-Z, MP8760GLE-P offers wider output adjustability and pre-bias support at the cost of larger package and slightly higher conduction loss; versus RT7295BGJ8F, it delivers superior transient response and design flexibility via COT and programmable soft-start-but requires more careful loop stability analysis with ceramic capacitors.

Availability

MP8760GLE-P is available at Aetrix Electronics and suitable for flat-panel display power, small-cell base station RFIC supply, and distributed power system intermediate bus applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP8760GLE-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 MP8760 belongs to MPS's high-current synchronous buck converter product line, engineered for compact, high-efficiency point-of-load regulation in space-constrained consumer, telecom, and industrial systems where thermal performance and transient response are critical.

FAQ

What is the minimum recommended input voltage for MP8760GLE-P with internal bias?

The MP8760GLE-P requires a minimum 4.5V input when using internal VCC bias. Below this, the internal 4.8V LDO cannot regulate, causing unstable gate drive and potential dropout. External 5V bias enables operation down to 2.5V input, but requires routing a clean 5V rail to the VCC pin and disconnecting the internal LDO.

How does the FREQ pin set switching frequency, and what resistor value yields 500kHz?

The FREQ pin uses input-voltage feed-forward to program ON-time: τ_ON ≈ 0.4 × R_FREQ(kΩ) × (V_IN − 6.1) ns. For 500kHz at V_IN = 12V, solving f_SW = 1/(τ_ON + τ_OFF) with τ_{OFF_MIN} = 360ns gives R_FREQ ≈ 249kΩ. A standard 249kΩ resistor achieves ~500kHz across 9V–15V input range.

Can MP8760GLE-P safely start into a pre-biased output, and how is it implemented?

Yes-MP8760GLE-P supports monotonic pre-bias startup. When EN goes high, the IC compares SS capacitor voltage to FB voltage; if FB > SS, both HS- and LS-FETs remain off until SS voltage rises above FB. This prevents reverse current flow and ensures controlled ramp-up even when output is held at 1.0V by another supply.

What is the maximum allowable output voltage, and how is it set?

The MP8760GLE-P supports output voltages up to 13V, set by the feedback resistor divider: V_OUT = V_REF × (1 + R1/R2), where V_REF = 611mV. To achieve 13V, use R1 = 1.96MΩ and R2 = 100kΩ (standard values). Output accuracy remains within ±1.5% over temperature and line when R1/R2 ratio tolerance is ≤0.5%.

Does MP8760GLE-P require an external ramp compensation network with ceramic output capacitors?

Yes-ceramic capacitors have low ESR, resulting in insufficient natural VFB slope for COT stability. An external ramp (R4/C4 network from SW to FB) is required. Design must satisfy C4 × R4 < 0.5 × τ_ON and ensure VFB descending slope ≥ 0.7 × (V_OUT/L) × ΔI_L × τ_ON to suppress jitter-induced instability in PWM mode.

What thermal derating applies when operating at 6A ambient temperature above 25°C?

With θ_JA = 46°C/W on a 4-layer PCB, maximum power dissipation drops linearly: P_D(MAX) = (150°C − T_A)/46W. At T_A = 60°C, P_D(MAX) = 1.96W. Given typical 6A losses (~1.3W at 12V_IN/1.2V_OUT), derating begins above 85°C ambient-requiring thermal pad soldering and ≥2 in² copper area for full 6A rating.

Is MP8760GLE-P pin-compatible with the older MP8760GL (QFN-13)?

No-MP8760GLE-P uses QFN-16 with relocated pins (e.g., IN moved from pin 13 to pin 16, added BST pins at 9/14), different thermal pad layout, and updated internal protection thresholds. The QFN-13 version is marked "NOT RECOMMENDED FOR NEW DESIGNS" and lacks the enhanced soft-start and PG timing of the QFN-16 variant.