MP8795GLE-P: 15A Synchronous Step-Down Converter with COT Control

Designed as a fully integrated, high-frequency synchronous step-down converter, the MP8795GLE-P is a member of Monolithic Power Systems' (MPS) MP8795 family of high-current buck regulators. Categorized as a compact, high-efficiency power solution within MPS' switching converter portfolio, this device is available in a QFN-21 (3mm × 4mm) surface-mount package, optimised for space-constrained PCB layouts and automated SMT assembly. By integrating low-R_DS(ON) power MOSFETs and an internally compensated control loop into a single monolithic die, the MP8795 delivers up to 15A of continuous output current from a wide input supply range with excellent load and line regulation-enabling system designers to build compact, high-power-density point-of-load converters with a minimal external component count[reference:0][reference:1].

The core advantage of this synchronous buck converter lies in its internally compensated constant-on-time (COT) control architecture, which provides fast transient response and eases loop stabilisation without requiring external compensation components. The operating frequency is programmable via the MODE pin to 600kHz, 800kHz, or 1000kHz, allowing the switching frequency to remain constant regardless of input and output voltages-a key advantage for EMI-sensitive designs and multi-rail systems that require predictable spectral behaviour[reference:2]. Unlike many competing converters that force a trade-off between transient speed and loop simplicity, the MP8795's COT scheme responds rapidly to load steps while maintaining stable operation across the full output current range.

At the heart of the MP8795 is a fully integrated power stage featuring low-R_DS(ON) high-side and low-side MOSFETs, eliminating the need for external power switches. The device supports a wide input voltage range of 4V to 16V with internal bias, or 2.7V to 16V when an external 3.3V VCC bias is provided. The output voltage is adjustable from 0.6V to 90% × V_IN, up to a maximum of 5.5V, accommodating a broad range of digital and analog load requirements. Additional functional blocks include differential output voltage remote sensing for accurate regulation at the load point, a programmable accurate current limit, and voltage tracking capability for controlled sequencing in multi-rail systems[reference:3][reference:4].

The MP8795 is equipped with comprehensive protection and sequencing features as standard configurations. Full protection includes over-current protection (OCP), over-voltage protection (OVP) with latch-off behaviour, under-voltage protection (UVP), under-voltage lockout (UVLO), and thermal shutdown. The PGOOD open-drain output indicates whether the output is within its nominal regulation window; during input power failure, PGOOD is actively clamped to approximately 0.7V through an external pull-up, preventing ambiguous fault signalling. The soft-start time is programmable from 1ms via an external capacitor on the SS pin, and the device supports selectable pulse-skipping or forced continuous conduction mode (CCM) operation to balance light-load efficiency against output ripple requirements[reference:5].

The MP8795GLE-P operates from a 4V to 16V input supply (or 2.7V to 16V with external 3.3V VCC bias) and delivers up to 15A continuous output current. Its operating junction temperature range covers ‑40°C to 125°C, ensuring stable performance across industrial and consumer ambient conditions. The device features output voltage discharge functionality and a low quiescent current of 650µA typical. The QFN-21 (3mm × 4mm) package offers a minimal PCB footprint while providing adequate thermal performance for high-current operation. The component is RoHS3 compliant, carries Moisture Sensitivity Level 1 (MSL 1) rating, and is classified under ECCN EAR99 for export control purposes[reference:6][reference:7].

Product variant comparison - The MP8795 family is offered in multiple orderable variants that differ primarily in packaging format and current capability. The MP8795GLE-P and MP8795GLE-Z are electrically identical devices; the "P" and "Z" suffixes indicate reel size differences only, as explicitly stated by MPS. The MP8795HGLE-Z variant extends the output current capability to 20A while maintaining the same QFN-21 footprint and COT control architecture, offering a higher-current option for more demanding loads. All variants share the same 4V–16V input range, 0.6V–5.5V adjustable output, and programmable switching frequency. The following table summarises the key differentiators among MP8795 orderable variants:

For replacement considerations, the MP8795GLE-P is form-fit-function compatible with the MP8795GLE-Z, differing only in reel configuration for automated assembly. Designers requiring a higher current ceiling may migrate to the MP8795HGLE-Z (20A) without PCB layout changes, as both variants share the same QFN-21 footprint and pin configuration. Within MPS' broader step-down converter portfolio, the MP8792 and MP8794 offer related feature sets at different current and frequency points, while the MPQ8633B provides a pin-compatible alternative with similar 20A capability for applications requiring multi-source supply options[reference:8]. All MP8795 variants are active and available, with the MP8795GLE-P carrying a manufacturer standard lead time of approximately 36 weeks through authorised distributors[reference:9].

Common application scenarios for this synchronous step-down converter include point-of-load regulation for FPGAs, ASICs, and DSPs, telecom and datacom equipment power rails, industrial embedded power modules, server and storage voltage regulation, and multi-rail systems requiring voltage tracking and precise current limiting. Typical use cases involve converting a 12V intermediate bus to core voltages as low as 0.6V at 15A, implementing dynamically adjustable output rails for processor DVFS (dynamic voltage and frequency scaling), and designing compact high-current POL converters where board area and thermal headroom are tightly constrained. The device's differential remote sensing ensures accurate voltage delivery to the load despite PCB trace impedance, while the programmable current limit and voltage tracking simplify system-level power sequencing and fault management. Thanks to its internally compensated COT control, 15A monolithic power stage, wide 4V–16V input range, and comprehensive protection suite, the MP8795GLE-P has become a trusted choice for engineers seeking a compact, efficient, and design-friendly synchronous step-down converter-one that delivers the transient performance and current density required for modern high-performance electronics, all while maintaining the simplicity and minimal footprint of a fully integrated QFN-21 solution.