Monolithic Power Systems Inc. MP2329CGG-Z

Overview

MP2329CGG-Z from Monolithic Power Systems is a fully integrated, synchronous buck converter delivering 6.5A continuous output current with forced CCM operation, 4.5V–24V input range, and 700kHz fixed switching frequency. It integrates low-R_DS(ON) MOSFETs (36mΩ HS / 12mΩ LS), adaptive constant-on-time (COT) control for fast transient response, and full protection including OCP, OVP, UVP, and thermal shutdown. Used in security cameras and flat-panel displays for stable 3.3V/5V rail generation.

For engineers reviewing the MP2329CGG-Z datasheet, MP2329CGG-Z pinout, MP2329CGG-Z application, or MP2329CGG-Z equivalent, key selection criteria include its 105μA quiescent current, remote differential sensing for load regulation, power-good (PG) open-drain output, internal soft-start, and QFN-11 (2mm×2mm) package with validated thermal performance up to +125°C junction temperature.

Technical Context

The MP2329CGG-Z employs adaptive constant-on-time (COT) control with DC auto-tune loop and remote differential sense feedback, enabling tight line/load regulation (<±0.4%) across 4.5V–24V input and 0.6V–13V output ranges. Its forced CCM mode ensures consistent EMI profile and eliminates subharmonic oscillation in light-load conditions.

Internal integration includes matched high-side and low-side MOSFETs (36mΩ/12mΩ), a 3.3V VCC LDO, bootstrap gate driver, and valley-current-limit protection with 6A–9A adjustable threshold. The IC supports ceramic and POSCAP output capacitors without external ramp compensation under typical conditions.

Key Specifications

Pinout & Package

MP2329CGG-Z is housed in a thermally enhanced QFN-11 (2mm × 2mm, 0.5mm pitch) package with exposed thermal pad. Pin 1 is marked by dot; top marking "HB" indicates MP2329CGG variant. Package meets MSL Level 1 and supports reflow per JEDEC J-STD-020.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2329CGG-Z, MP2338GQ-Z trades PG functionality and wider input for higher current, while TPS546B24RVFT adds digital configurability at the expense of analog simplicity and smaller footprint-making MP2329CGG-Z optimal for cost-sensitive, space-constrained analog-regulated systems requiring guaranteed PG signaling.

Availability

MP2329CGG-Z is available at Aetrix Electronics and suitable for security cameras, flat-panel displays, and digital set-top boxes requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2329CGG-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 power management ICs, with design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2329C belongs to MPS's high-density, low-I_Q synchronous buck converter product line, engineered specifically for space- and efficiency-critical applications in surveillance, consumer displays, and broadband communications equipment.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP2329CGG-Z is stable with ≥22μF ceramic output capacitance (X5R/X7R) or POSCAPs. For 3.3V/5V outputs, 47μF–100μF is typical; lower values (≥10μF) may be used with careful layout and external ramp compensation if jitter exceeds design limits.

Does MP2329CGG-Z support pre-biased output startup?

Yes. When the FB node senses a pre-biased output voltage exceeding the internal reference ramp target, the IC disables both HS and LS switches until VREF ramps above the sensed voltage, preventing reverse current and ensuring monotonic startup.

How is the valley current limit adjusted, and what is its tolerance?

The valley current limit is fixed at 6A (min) to 9A (max) and is set by internal sensing of the LS-FET R_DS(ON). It has ±15% variation over temperature (–40°C to +125°C) and does not require external components; typical value is 7.5A at +25°C.

Can MP2329CGG-Z operate with only ceramic input capacitors?

Yes. Ceramic input capacitors (X5R/X7R, ≥10μF, rated ≥25V) placed within 2mm of VIN and PGND pins are sufficient. Multiple parallel capacitors (e.g., 10μF + 2.2μF) improve high-frequency ripple suppression and reduce effective ESL.

What is the maximum allowable thermal pad copper area on the PCB?

No maximum limit exists-the thermal pad must be connected to a solid internal or bottom-layer copper pour (≥100mm² recommended) with ≥6 thermal vias (0.3mm diameter, filled or capped) to inner/ground planes for optimal θ_JA performance (34°C/W on 4-layer EV board).

Is external ramp compensation required for all ceramic-capacitor designs?

No. External ramp (e.g., 1MΩ + 220pF to FB) is only needed if instability or excessive jitter occurs-typically in high-ESR ceramic configurations or when output capacitance falls below 22μF. Most designs with ≥47μF X7R ceramics operate stably without it.

How does the PG pin behave during thermal shutdown?

During thermal shutdown, the PG pin is actively pulled low within 10μs, signaling loss of regulation. It remains low until junction temperature drops to ~125°C, soft-start completes, and VOUT stabilizes within 95–115% of VREF-ensuring downstream logic remains held in reset until full recovery.