Monolithic Power Systems Inc. MP2332CGTL-Z

Overview

MP2332CGTL-Z from Monolithic Power Systems is a fully integrated 18V, 2A synchronous step-down DC/DC converter with constant-on-time (COT) control, power-good (PG) output, programmable soft-start, and forced continuous conduction mode (CCM). It features 95mΩ/45mΩ internal MOSFETs, 650kHz switching frequency, 200µA quiescent current, and operates across 4.2V–18V input range. Used in flat-panel displays for stable 3.3V/2.5V rail generation under dynamic load.

For engineers reviewing the MP2332CGTL-Z datasheet, MP2332CGTL-Z pinout, MP2332CGTL-Z application, or MP2332CGTL-Z equivalent, key selection criteria include COT-based transient response, PG timing thresholds (92%–107% VREF), SOT583 thermal resistance (θJA = 55°C/W), and pre-bias start-up capability for embedded power sequencing.

Technical Context

The MP2332CGTL-Z employs constant-on-time (COT) control with input- and output-voltage-dependent on-timer to maintain ~650kHz switching across 4.2V–18V input while delivering up to 2A continuous output. Its forced CCM operation eliminates mode transitions, ensuring consistent EMI profile and predictable inductor current ripple.

Internal high-side (95mΩ) and low-side (45mΩ) N-channel MOSFETs are driven via bootstrap circuitry requiring external 1µF BST capacitor; PG is open-drain with 0.13V sink voltage at 1mA and 50µs rising delay. Protection includes valley-current OCP with hiccup recovery, thermal shutdown at 150°C, and UVLO with 4V rising threshold.

Key Specifications

Pinout & Package

SOT583 (1.6mm × 2.1mm) package with wettable flanks for automated optical inspection and enhanced thermal performance. Exposed pad thermally connected to GND for θJC = 21°C/W on EV2332C-TL-00A evaluation board.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2332GTL-Z, the MP2332CGTL-Z adds industrial-grade temperature margin and tighter parametric guarantees; versus TPS54202DRCT, it delivers faster transient response, integrated PG, and simpler layout-justifying its use where reliability and ease of integration are prioritized over absolute lowest BOM cost.

Availability

MP2332CGTL-Z is available at Aetrix Electronics and suitable for flat-panel television, game console, and industrial HMI designs requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2332CGTL-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 over two decades of expertise in DC/DC conversion, motor drivers, and LED lighting controllers.

The MP2332C product line targets space-constrained, efficiency-critical applications in consumer electronics and industrial equipment, emphasizing minimal external component count, robust protection, and seamless integration into compact PCB layouts.

FAQ

What is the minimum recommended output capacitor value for stable operation at 2A load?

The MP2332CGTL-Z requires ≥22µF ceramic output capacitance with low ESR (≤10mΩ) for stable 2A operation. Lower values risk excessive output voltage ripple (>50mV) and degraded load transient response. Use X5R/X7R dielectrics rated for ≥6.3V; place capacitors within 3mm of FB and GND pins to minimize loop inductance.

Can the MP2332CGTL-Z operate with an input voltage below 4.2V?

No. The absolute minimum input voltage is 4.2V per datasheet specifications. Below this, UVLO prevents startup and internal bias rails cannot sustain regulation. Attempting operation at 4.0V may cause erratic behavior, failed soft-start, or thermal runaway due to insufficient gate drive voltage for internal MOSFETs.

How does the bootstrap capacitor (BST) charging work during startup?

The BST capacitor charges through an internal diode from VIN when SW is low. During normal operation, charge transfers from SW to BST during the LS-FET on phase. A 1µF X7R ceramic capacitor with ≤100mΩ ESL is mandatory; undersized BST caps cause high-side driver dropout and cycle skipping, especially at low duty cycles (<20%).

Is the MP2332CGTL-Z compatible with ceramic input capacitors only?

Yes-ceramic input capacitors (X5R/X7R, ≥10µF, 25V rating) are required. Aluminum or tantalum types introduce excessive ESR and inductance, causing VIN instability, increased ripple, and potential OCP false triggering. Place the capacitor ≤2mm from VIN and GND pins with direct copper pours and ≥2 thermal vias.

What happens during a short-circuit event on the output?

Upon short-circuit detection, the MP2332CGTL-Z enters hiccup mode: it disables switching, discharges the SS capacitor, waits ~20ms, then attempts soft-start again. This repeats until the fault clears. PG goes low immediately, and thermal shutdown activates only if junction exceeds 150°C during sustained fault-providing robust self-protection without latch-up.

Does the MP2332CGTL-Z support adjustable switching frequency?

No. The switching frequency is fixed at 650kHz (typical) by internal COT timing circuitry and cannot be adjusted externally. Frequency varies ±25% across temperature and input voltage but remains centered near 650kHz-enabling predictable EMI filtering and inductor selection without frequency programming pins or resistors.

How is pre-bias start-up implemented without causing reverse current?

During pre-bias conditions, the MP2332CGTL-Z monitors FB voltage before enabling the HS-FET. If VFB > 0.4V, the LS-FET remains off until BST voltage reaches 2.2V and VSS/2 exceeds VFB, preventing reverse current flow through the LS-FET body diode and avoiding output voltage collapse or inrush damage.