Monolithic Power Systems Inc. MP2333CGTL-P

Overview

MP2333CGTL-P from Monolithic Power Systems is a fully integrated, synchronous step-down DC-DC converter delivering 3A continuous output current with 4.2V–18V input range, 650kHz fixed switching frequency, and forced CCM operation in a 1.6mm × 2.1mm SOT583 package. It integrates 75mΩ/40mΩ high-side/low-side MOSFETs, supports pre-bias start-up, and provides power-good (PG) indication and programmable soft-start for reliable power sequencing in compact consumer electronics.

For engineers reviewing the MP2333CGTL-P datasheet, MP2333CGTL-P pinout, MP2333CGTL-P application, or MP2333CGTL-P equivalent, key selection considerations include its COT control architecture for fast transient response, 200µA quiescent current under light load, thermal shutdown at 150°C, and compatibility with ceramic output capacitors down to 10µF for space-constrained designs.

Technical Context

The MP2333CGTL-P employs constant-on-time (COT) control with input- and output-voltage-dependent on-timer to maintain stable 650kHz switching across 4.2V–18V input while regulating output from 0.8V to 13V via external resistor divider. Its internal bootstrap circuit sustains high-side gate drive using a 1µF BST capacitor, and valley-current sensing enables over-current protection with hiccup recovery.

It operates exclusively in forced continuous conduction mode (CCM), eliminating mode transitions that cause audible noise or regulation instability. The open-drain PG pin asserts high only after soft-start completion and when FB voltage remains within 87–120% of 805mV reference, ensuring robust system power sequencing under line/load transients and fault conditions.

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-side marking "BDF" per datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2333GTL-Z, MP2333CGTL-P offers identical performance with verified marking and packaging for prototyping; versus RT7295BGJ6F, it adds critical PG signaling and user-defined soft-start-key for reliable boot in complex embedded systems.

Availability

MP2333CGTL-P is available at Aetrix Electronics and suitable for game consoles, digital set-top boxes, flat-panel television power supplies, and general-purpose embedded systems requiring stable component supply with guaranteed long-term availability.

Supply support for MP2333CGTL-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 design centers in the US, China, and Taiwan, and global manufacturing partnerships.

The MP2333C product line targets space-constrained, high-efficiency DC-DC conversion in consumer electronics, emphasizing integration (internal MOSFETs, COT control, PG), thermal robustness, and ease of layout in ultra-small packages like SOT583.

FAQ

What is the minimum recommended output capacitance for stable operation?

The MP2333CGTL-P requires ≥10µF ceramic output capacitance for stable regulation and adequate load transient response. Lower values may cause overshoot or instability under fast load steps; typical designs use 22µF–47µF X5R/X7R ceramics with ≤5mΩ ESR to meet ripple and phase margin requirements.

Can MP2333CGTL-P operate with an input voltage below 4.2V?

No-input voltage must remain ≥4.2V for proper operation. Below this threshold, the internal UVLO disables switching; the rising UVLO threshold is 4.0V with 400mV hysteresis, so the device will not restart until VIN exceeds 4.4V after dropout.

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

Soft-start time (T_SS) in milliseconds equals (C_SS in nF × 1.61) ÷ 1000, derived from the internal 7.3µA current source and 805mV reference. For example, a 4.7nF capacitor yields ~7.6ms ramp time, ensuring monotonic rise into pre-biased loads without undershoot.

Does MP2333CGTL-P support automatic frequency adjustment under light load?

No-it operates exclusively in forced PWM mode across the entire 0–3A load range. Unlike pulse-skipping or DCM modes, forced CCM maintains fixed 650kHz switching to ensure predictable EMI spectrum and eliminate audible noise, even at no load.

What is the maximum allowable output capacitor value before soft-start failure occurs?

The maximum output capacitance is constrained by soft-start current: C_{O_MAX} ≈ (I_{LIM_AVG} – I_OUT) × T_SS / V_OUT. With typical 3A limit and 10ms soft-start, C_{O_MAX} ≈ 300µF for 1V output. Exceeding this risks incomplete ramp-up and regulation failure due to insufficient charge current.

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

Yes-a 1µF X5R or X7R ceramic capacitor is mandatory between BST and SW. It must withstand ≥12V rating (≥1.5× VIN_MAX) to survive bootstrap voltage spikes; typical selection is 16V-rated 0603 or 0805 case size with low ESL for reliable high-side gate drive.