Monolithic Power Systems Inc. MP2329CGG-P

Overview

MP2329CGG-P from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering 6.5A continuous output current with forced CCM operation, adaptive constant-on-time (COT) control, and 105μA quiescent current. It operates across 4.5V–24V input, supports 0.6V–13V output via external resistor divider, and integrates low-R_DS(ON) MOSFETs (36mΩ HS / 12mΩ LS) in a QFN-11 (2mm×2mm) package for compact power delivery in space-constrained embedded systems.

For engineers reviewing the MP2329CGG-P datasheet, MP2329CGG-P pinout, MP2329CGG-P application, or MP2329CGG-P equivalent, key selection considerations include its fixed 700kHz switching frequency, remote differential sensing capability, DC auto-tune loop for tight load/line regulation, power-good (PG) open-drain output, and comprehensive protection suite (OCP, OVP, UVP, thermal shutdown with auto-retry).

Technical Context

The MP2329CGG-P employs adaptive COT control to achieve fast transient response without external compensation, while its DC auto-tune loop dynamically adjusts timing to maintain regulation under varying line and load conditions. The internal 3.3V VCC LDO powers control logic and drivers, decoupled by ≥1µF X7R/X5R ceramic capacitor.

It operates exclusively in forced continuous conduction mode (CCM), eliminating mode transitions that cause audible noise or regulation instability. Valley-current limiting uses the low-side MOSFET's R_DS(ON) for cycle-by-cycle overcurrent protection, with 6A–9A adjustable trip threshold and hiccup-mode recovery during sustained overload or short-circuit events.

Key Specifications

Pinout & Package

MP2329CGG-P is housed in a thermally enhanced QFN-11 (2mm × 2mm) package with exposed thermal pad. Pin numbering follows top-view orientation per MPS package drawing; all pins are surface-mount with 0.5mm pitch.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2329CGG-P, MP2338GQ-P offers higher current capacity but sacrifices compactness and ultra-low IQ, while RT7295BGJ8F achieves lower quiescent current at the cost of regulation precision and integrated features-making MP2329CGG-P optimal for balanced performance in space-constrained, medium-power embedded systems.

Availability

MP2329CGG-P is available at Aetrix Electronics and suitable for security cameras, portable XDSL devices, and digital set-top boxes requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.

Supply support for MP2329CGG-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 power management ICs, with over two decades of innovation in DC/DC converters, LED drivers, and motor controllers.

The MP2329C product line targets compact, high-efficiency point-of-load conversion in space- and thermal-constrained applications such as surveillance equipment, networking hardware, and consumer displays-emphasizing integration, reliability, and ease of design-in.

FAQ

What is the minimum recommended output capacitor for stable operation?

The MP2329CGG-P is stable with ceramic or POSCAP output capacitors; MPS recommends ≥22µF X7R/X5R ceramic with ≤5mΩ ESR for 3.3V output. For 1.2V/1.5V rails, ≥47µF is advised to maintain phase margin under heavy transient loads. Avoid high-ESR electrolytics unless paired with low-ESR ceramics.

Does MP2329CGG-P support output pre-bias startup?

Yes. When the FB node is pre-biased above the internal reference voltage during startup, the MP2329CGG-P disables both high-side and low-side switches until VREF ramps up past the sensed output voltage-preventing reverse current flow and ensuring monotonic rise without output voltage overshoot.

How is the valley-current limit threshold determined?

The valley-current limit is set by internal comparator thresholds referencing the low-side MOSFET's R_DS(ON). At TJ = 25°C, the typical trip point is 7.5A (min 6A, max 9A), with temperature coefficient tracking inductance and R_DS(ON) drift. No external programming is required-the limit scales naturally with input/output conditions.

Can MP2329CGG-P operate with only ceramic input capacitors?

Yes. Ceramic input capacitors (X5R/X7R, ≥10µF, rated ≥25V) placed close to VIN and PGND pins are sufficient. MPS specifies minimum 2× 10µF ceramics for 24V input; no bulk electrolytic is needed if layout minimizes loop inductance and thermal pad is properly soldered.

What is the purpose of the AGND pin and how should it be routed?

AGND provides a Kelvin reference for the feedback amplifier, isolating sensitive analog ground from high-current power ground returns. It must be connected directly to the FB resistor divider ground node-not to PGND-and routed away from noisy traces (especially SW) to prevent measurement error exceeding ±10mV.

Is external ramp compensation required for ceramic output capacitors?

No. The MP2329CGG-P includes internal ramp compensation optimized for ceramic and POSCAP outputs. External ramp (e.g., 1MΩ + 220pF) is only needed if jitter exceeds system noise immunity requirements-typically observed only in high-ESR ceramic variants or marginal PCB layouts with poor SW node routing.

How does the power-good (PG) signal behave during thermal shutdown?

During thermal shutdown, PG is actively pulled low within 10µs of junction temperature exceeding 150°C. It remains low until the die cools to ~125°C and soft-start completes; PG then transitions high only after output voltage stabilizes within 95–115% of VREF for >100µs-ensuring safe system resumption.