Monolithic Power Systems Inc. MP2329GG-P

Overview

MP2329GG-P from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering 6.5A continuous output current with adaptive constant-on-time (COT) control, 105μA quiescent current, and 700kHz fixed switching frequency. It operates across 4.5V–24V input and supports 0.6V–13V adjustable output voltage, targeting power rails in security cameras, set-top boxes, and flat-panel displays.

For engineers reviewing the MP2329GG-P datasheet, MP2329GG-P pinout, MP2329GG-P application, or MP2329GG-P equivalent, key selection criteria include its QFN-11 (2mm×2mm) thermal performance, valley-current OCP architecture, remote differential sensing capability, and compatibility with POSCAP/ceramic output capacitors without external ramp compensation.

Technical Context

The MP2329GG-P implements adaptive COT control with DC auto-tune loop and remote differential sense for ±0.5% load/line regulation. Its internal high-side (36mΩ) and low-side (12mΩ) MOSFETs enable >95% peak efficiency at 3.3V/6.5A with 19V input.

Valley-current limiting uses the low-side R_DS(ON) for cycle-by-cycle protection, while dual-stage UVP (75%/50% V_REF) and hiccup-mode recovery ensure robust fault handling. Thermal shutdown activates at 150°C with 25°C hysteresis and automatic soft-start recovery.

Key Specifications

Pinout & Package

MP2329GG-P is housed in a thermally enhanced QFN-11 package (2mm × 2mm, 0.5mm pitch) with exposed thermal pad. The package supports high-density layout and efficient heat dissipation via PCB copper area and vias under the pad.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous buck converter applications.

Compared with RT6220AGQW and TPS546B24RVFT, the MP2329GG-P uniquely combines ultra-low I_Q, remote differential sensing, and adaptive COT in a minimal 2mm×2mm footprint-making it optimal for space-constrained, always-on consumer electronics where analog simplicity and precision regulation are prioritized over digital configurability or higher current headroom.

Availability

MP2329GG-P is available at Aetrix Electronics and suitable for security cameras, digital set-top boxes, flat-panel televisions and monitors, and portable XDSL devices requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2329GG-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 MP2329 belongs to MPS's high-efficiency, low-I_Q buck converter product line, engineered specifically for compact, thermally constrained consumer and industrial power supplies demanding fast transient response and minimal external components.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP2329GG-P is stable with ≥22µF total ceramic output capacitance (e.g., four 4.7µF X7R 0805 caps). Lower values may cause instability in CCM; POSCAPs down to 10µF are also supported. Layout must minimize ESL by placing caps close to SW/PGND pins and using multiple vias.

Does MP2329GG-P require an external bootstrap capacitor?

Yes - a 0.1µF X7R ceramic capacitor must be placed between BST and SW pins. This capacitor sustains the high-side gate drive voltage during each switching cycle. Use high-quality, low-ESR dielectric and route with short, direct traces to avoid bootstrap failure or erratic switching.

How does the valley-current OCP behave under short-circuit conditions?

Under short-circuit, the MP2329GG-P enters hiccup mode after UVP-2 triggers (V_FB < 50% V_REF). It disables switching, waits ~10ms, then attempts soft-start recovery. This cycle repeats until fault clears - preventing thermal runaway while limiting average power dissipation to safe levels.

Can MP2329GG-P operate with pre-biased outputs?

Yes - the IC detects pre-bias at the FB node and holds both HS/LS switches off until the internal V_REF ramp exceeds the sensed output voltage. This prevents reverse current flow and ensures monotonic startup even when V_OUT is externally held high.

What is the maximum allowable voltage on the EN pin?

The EN pin has an absolute maximum rating of 4.5V. Exceeding this risks permanent damage to the internal ESD structure. For automatic start-up from VIN, use a resistive divider that guarantees EN ≤ 4.5V across all input conditions - e.g., R_UP = 150kΩ, R_DOWN = 51kΩ yields safe EN voltage up to 24V input.

Is the thermal pad electrically connected to any internal node?

No - the exposed thermal pad is internally connected only to PGND. It must be soldered to a dedicated PGND copper pour with ≥4 thermal vias (0.3mm diameter) to achieve specified θ_JA = 80°C/W. Do not connect it to AGND, VIN, or other nets.