Monolithic Power Systems Inc. MP2329GG-Z

Overview

MP2329GG-Z 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 fixed 700kHz switching frequency. It operates across 4.5V–24V input and supports 0.6V–13V adjustable output voltage, targeting power rails in security cameras and flat-panel displays.

For engineers reviewing the MP2329GG-Z datasheet, MP2329GG-Z pinout, MP2329GG-Z application, or MP2329GG-Z equivalent, this device is selected for high-efficiency, low-I_Q DC/DC conversion in space-constrained industrial and consumer systems requiring fast transient response and robust protection.

Technical Context

The MP2329GG-Z implements adaptive COT control to maintain stable regulation across wide input/output ranges while minimizing external compensation needs. Its valley-current sensing OCP uses internal low-R_DS(ON) MOSFETs (HS: 36mΩ, LS: 12mΩ) and integrates DC auto-tune loop with remote differential sense for ±0.5% load regulation.

It features non-latching thermal shutdown at 150°C (25°C hysteresis), hiccup-mode UVP/OVP response, and open-drain Power Good (PG) with 95–115% V_REF window. Internal soft-start (1.7ms typ.) and output discharge (40Ω) ensure controlled power sequencing and safe turn-off.

Key Specifications

Pinout & Package

MP2329GG-Z is housed in a thermally enhanced QFN-11 (2mm × 2mm) package with exposed thermal pad. Pin 1 is marked by dot; top marking includes "FZ" product code, year code, and lot number.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2329GG-Z, MP2339HG-A trades higher peak current and switching frequency for increased quiescent draw, while RT7297BGS reduces I_Q by 75% but sacrifices PG indication and precision load regulation-making MP2329GG-Z optimal for balanced performance in cost-sensitive, thermally constrained applications.

Availability

MP2329GG-Z is available at Aetrix Electronics and suitable for security cameras, flat-panel televisions and monitors, digital set-top boxes, and portable XDSL devices requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for MP2329GG-Z 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 expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP2329 belongs to MPS's high-efficiency, low-I_Q buck converter product line, engineered specifically for space-constrained, thermally sensitive applications in consumer electronics and industrial imaging where reliability and minimal external components are critical.

FAQ

What is the recommended input capacitor configuration for MP2329GG-Z?

Use a minimum 22µF X7R ceramic capacitor rated ≥25V placed within 3mm of VIN and PGND pins, supplemented by a 100nF high-frequency bypass capacitor. For 24V input, add a 10µF POSCAP or polymer capacitor in parallel to handle high RMS ripple current and improve hold-up time during transients.

Can MP2329GG-Z operate with only ceramic output capacitors?

Yes. Its internal ramp compensation and adaptive COT architecture stabilize operation with ≥22µF total ceramic output capacitance (e.g., four 4.7µF/6.3V X7R in parallel). No external ramp is required unless measured jitter exceeds system noise immunity requirements, per Application Note AN-107.

How does the valley-current OCP respond during short-circuit events?

The MP2329GG-Z limits inductor valley current to 6–9A (typ. 7.5A) using LS-FET R_DS(ON) sensing. During sustained short, output voltage collapses below 50% V_REF, triggering UVP-2 and entering hiccup mode-cycling on/off with ~100ms off-time until fault clears.

What is the thermal performance of MP2329GG-Z on a standard 4-layer PCB?

On a JESD51-7 compliant 4-layer board (2oz copper, 1in² thermal pad area), θ_JA is 80°C/W. At 6.5A output with 12V input and 3.3V output, junction temperature rise is ~42°C above ambient-well within the 125°C max operating limit at 85°C ambient.

Is the PG pin compatible with 1.8V logic systems?

Yes. PG is an open-drain output with 20mA sink capability and no internal pull-up. When used with a 1.8V pull-up resistor (e.g., 10kΩ), it asserts low at ≤0.4V and releases high at ≥1.4V, meeting standard 1.8V CMOS input thresholds without level-shifting.

Does MP2329GG-Z support pre-biased output startup?

Yes. The internal soft-start circuit detects pre-bias at the FB node and disables both HS- and LS-FET switching until V_REF ramps above the sensed output voltage, preventing reverse current flow and ensuring monotonic startup even when V_OUT is externally held high.

What is the minimum output voltage achievable with MP2329GG-Z?

The FB reference is 600mV ±10mV, so the theoretical minimum output is 0.6V. In practice, stable regulation down to 0.6V is confirmed with appropriate inductor DCR and output capacitor ESR; lower voltages require external reference scaling and are not guaranteed by datasheet specifications.