Monolithic Power Systems Inc. MP2330CGTL-Z

Overview

MP2330CGTL-Z from Monolithic Power Systems is a fully integrated synchronous step-down DC/DC converter delivering 3A continuous output current with 4.2V–24V input range, 650kHz fixed switching frequency, and forced CCM operation in a 1.6mm×2.1mm SOT583 package. It integrates 75mΩ/40mΩ high- and low-side MOSFETs, supports pre-bias start-up, and provides power-good (PG), soft-start (SS), and thermal shutdown for embedded power rails in compact consumer electronics.

For engineers reviewing the MP2330CGTL-Z datasheet, MP2330CGTL-Z pinout, MP2330CGTL-Z application, or MP2330CGTL-Z equivalent, key selection considerations include its COT control architecture for fast transient response, 200µA quiescent current at light load, 0.805V feedback reference with ±1.5% accuracy, and open-drain PG output with 87–97% UV and 115–125% OV thresholds.

Technical Context

The MP2330CGTL-Z employs constant-on-time (COT) control to achieve rapid load transient response and simplified loop compensation without external compensation components. Its internal timing circuit adjusts on-time based on both VIN and VOUT to maintain stable ~650kHz operation across input voltage variations.

It operates exclusively in forced continuous conduction mode (CCM) with valley-current sensing for over-current protection, hiccup-mode recovery, and integrated bootstrap charging for the high-side gate driver. The device includes dedicated SS pin for programmable soft-start via external capacitor and open-drain PG output referenced to internal 0.805V bandgap.

Key Specifications

Pinout & Package

SOT583 (1.6mm × 2.1mm) thermally enhanced 8-pin package with exposed pad for improved heat dissipation; pin 1 marked by dot, top-view orientation per MPS datasheet Rev. 1.0.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2330DGTL-Z, the MP2330CGTL-Z offers lower thermal derating in standard environments but identical performance below 125°C; versus RT6220GSP, it delivers superior system integration via PG/SS functionality and reduced BOM count despite slightly higher unit cost.

Availability

MP2330CGTL-Z is available at Aetrix Electronics and suitable for game consoles, digital set-top boxes, flat-panel television power supplies, and industrial HMI designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2330CGTL-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 MP2330C product line targets space-constrained, high-efficiency point-of-load (POL) conversion in consumer electronics, delivering integrated synchronous buck functionality with minimal external components and robust protection features.

FAQ

What is the minimum recommended input capacitance for MP2330CGTL-Z?

A minimum 22µF X5R/X7R ceramic capacitor is required at VIN, placed directly adjacent to pin 2 with low-ESR layout. For 24V input and 3A load, a 47µF parallel combination is recommended to limit input ripple to <100mVpp and ensure stable COT operation under transient conditions.

Can MP2330CGTL-Z operate with an output voltage lower than 0.8V?

No. The internal feedback reference is fixed at 0.805V ±1.5%, and the FB pin is designed for resistive divider configurations only. Output voltages below 0.8V violate the guaranteed operating condition and may result in regulation failure or undefined behavior per datasheet Section 4.

How is the soft-start time calculated for a given capacitor value?

Soft-start time (T_SS) in milliseconds equals (C_SS in nF × 0.805V) ÷ (7.3µA). For example, a 1nF capacitor yields ~110ms ramp time. This calculation assumes ideal conditions; actual ramp time may vary ±15% due to process tolerance and temperature drift.

Does MP2330CGTL-Z support automatic power sequencing with other regulators?

Yes - the open-drain PG output can drive the EN pin of downstream regulators. When MP2330CGTL-Z's output reaches regulation, PG pulls high (via external pull-up), enabling the next stage. This enables simple two-stage sequencing without external timers or supervisors.

What is the maximum allowable output capacitance before soft-start fails?

Maximum output capacitance is limited by soft-start current and time: C_{O_MAX} ≈ (I_{LIM_AVG} − I_OUT) × T_SS ÷ V_OUT. With 7.3µA SS current and 2ms T_SS, C_{O_MAX} is ~220µF for 3.3V/0A startup. Exceeding this risks incomplete ramp-up and failure to exit soft-start mode.

Is the BST capacitor required to be ceramic, and what voltage rating is needed?

Yes - a 1µF X5R or X7R ceramic capacitor rated for ≥10V is mandatory between BST and SW. Tantalum or electrolytic types introduce excessive ESR and leakage, degrading high-side gate drive strength and causing erratic switching or thermal runaway.

How does the MP2330CGTL-Z handle input voltage dropout during operation?

When VIN drops below 4.0V (UVLO rising threshold), the device disables switching and discharges the soft-start capacitor. PG goes low immediately. Recovery requires VIN to rise above 4.4V (4.0V + 400mV hysteresis) and EN to remain asserted; no latch-up occurs, enabling automatic restart.