Monolithic Power Systems Inc. MP2276GD-P

Overview

MP2276GD-P from Monolithic Power Systems is a fully integrated, high-frequency synchronous step-down DC/DC converter delivering up to 8A continuous output current across a 2.7V–16V input range. It employs adaptive constant-on-time (COT) control, supports programmable current limit via ILIM pin, offers selectable 600/1100/2000kHz switching frequency, and integrates 24mΩ/10mΩ HS/LS MOSFETs for high efficiency in compact power rails for digital set-top boxes and flat-panel displays.

For engineers reviewing the MP2276GD-P datasheet, MP2276GD-P pinout, MP2276GD-P application, or MP2276GD-P equivalent, key selection criteria include its COT-based transient response, soft-start programmability via SS/TRK capacitor, hiccup-mode OCP behavior, and forced-CCM vs. pulse-skip light-load operation mode selection through FREQ/MODE resistor configuration.

Technical Context

The MP2276GD-P implements adaptive COT control with internal RAMP compensation, enabling stable regulation with zero-ESR MLCC output capacitors across full input/output voltage ranges. Its error amplifier corrects FB-to-VREF error while maintaining excellent load regulation in both forced CCM and pulse-skip modes.

Switching is governed by fixed on-time determined by VIN, VOUT, and selected frequency; dead-time control prevents shoot-through between HS/LS FETs. Negative inductor current limiting at –4A with 80ns timeout and output sinking mode (OSM) activation above 105% VREF provide precise output voltage clamping during overvoltage transients.

Key Specifications

Pinout & Package

MP2276GD-P is housed in a thermally enhanced QFN-14 package (2mm × 3mm, 0.5mm pitch) with exposed thermal pad. The package supports high-current PCB routing via dual PGND pins (1, 14) and wide SW traces (2, 11), and requires careful AGND/VCC decoupling per layout guidelines.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2238DQ-LF-Z, MP2276GD-P delivers double current in same footprint-class package with superior light-load flexibility; versus TPS54821RHLR, it offers wider VIN range, adaptive COT response, and configurable operation modes at the cost of non-AEC-Q100 status.

Availability

MP2276GD-P is available at Aetrix Electronics and suitable for digital set-top boxes, flat-panel TV and monitors, and distributed power systems requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for MP2276GD-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 MP2276 belongs to MPS's high-current synchronous buck converter product line, engineered for compact, high-efficiency point-of-load regulation in consumer, computing, and industrial applications demanding fast transient response and flexible configuration.

FAQ

What is the minimum input voltage required for reliable operation?

The MP2276GD-P specifies a typical minimum input voltage of 2.7V, but operation below 3.3V requires connecting VIN directly to VCC. At VIN ≤ 3.3V, the internal VCC LDO cannot sustain regulation unless bypassed, and 2.7V is only a typical-not guaranteed-value for VIN falling conditions. For designs operating near this boundary, validate startup and regulation across temperature and load.

How does the ILIM pin set the current limit threshold?

The ILIM pin senses mirrored inductor current during the low-side FET conduction phase. A resistor (R_ILIM) from ILIM to AGND sets V_ILIM, which is compared to an internal 1.2V OCP threshold. Using G_CS = 40µA/A, R_ILIM = (1.2V × 2 × L × f_SW) / (V_IN – V_OUT) × I_LIM determines the programmed output current limit, enabling precise, load-independent protection.

Can MP2276GD-P operate with ceramic output capacitors only?

Yes-the MP2276GD-P is explicitly designed for stability with zero-ESR ceramic output capacitors due to its adaptive internal RAMP compensation in the COT control loop. No additional ESR network or tantalum/Al-elec bulk cap is required, enabling compact, low-profile designs with high-frequency ripple attenuation.

What happens during pre-bias start-up?

When the output is pre-biased at startup, the MP2276GD-P disables both HS and LS FETs until the internal soft-start voltage exceeds the sensed FB voltage. This prevents reverse current flow and output voltage overshoot, ensuring monotonic rise from the pre-bias level-critical for hot-swap and redundant power architectures.

Is the PG signal asserted during hiccup-mode OCP recovery?

No-the PG signal is actively held low during hiccup-mode OCP, UVP, or OVP events. It only asserts high after the output has stabilized within ±7.5% of the target for ≥1ms, and remains deasserted throughout fault recovery cycles. This provides unambiguous system-level power-health indication without false positives during protection events.

How does FREQ/MODE resistor selection affect light-load efficiency?

Connecting FREQ/MODE to AGND selects forced CCM, maintaining constant switching frequency and predictable ripple but reducing light-load efficiency. Connecting to VCC or higher-value resistors enables pulse-skip mode, where switching pauses between pulses-reducing switching losses and improving efficiency below ~1A, at the cost of increased low-frequency output ripple.

What thermal derating applies at 8A continuous output?

With θ_JA = 40°C/W (4-layer PCB), ambient temperature of 25°C, and maximum junction temperature of 150°C, the MP2276GD-P supports ≤2.7W dissipation-corresponding to ~0.34V dropout at 8A. Real-world derating requires thermal pad soldering, 2oz copper, and ≥4 thermal vias; full 8A is achievable only with adequate airflow or heatsinking per the EV2276-D-00A evaluation board layout.