Monolithic Power Systems Inc. MP2393GTL-P

Overview

MP2393GTL-P from Monolithic Power Systems is a fully integrated, synchronous step-down DC/DC converter with internal 75mΩ/40mΩ MOSFETs, delivering 3A continuous output current across a 4.2V–24V input range. It employs constant-on-time (COT) control for fast transient response and tight regulation, features power-good (PG) and programmable soft-start (SS), and operates at 650kHz in a 1.6×2.1mm SOT583 package-targeted for compact, high-efficiency point-of-load conversion in digital consumer electronics.

For engineers reviewing the MP2393GTL-P datasheet, MP2393GTL-P pinout, MP2393GTL-P application, or MP2393GTL-P equivalent, key selection considerations include its COT architecture for dynamic load handling, integrated bootstrap circuitry for high-side gate drive, PG open-drain signaling with 87–125% VREF thresholds, and thermal shutdown at 150°C with 20°C hysteresis.

Technical Context

The MP2393GTL-P implements a constant-on-time (COT) control loop that dynamically adjusts off-time to maintain stable switching frequency (~650kHz) across wide VIN and VOUT ranges, enabling rapid load transient recovery without external compensation. Its internal high-side and low-side N-channel MOSFETs operate in synchronous rectification mode, eliminating external diode losses and supporting >90% efficiency at 3A under 12V_IN/3.3V_OUT.

Power sequencing is managed via dedicated EN, SS, and PG pins: EN enables/disables operation with 1.23V rising threshold and 100mV hysteresis; SS accepts an external capacitor to set soft-start time (e.g., 1µF → ~280ms); PG provides open-drain status indication with UV/OV detection referenced to 805mV internal VREF and 50µs rising/falling delays.

Key Specifications

Pinout & Package

SOT583 (1.6mm × 2.1mm) thermally enhanced 8-pin package with exposed pad for improved heat dissipation; compatible with standard reflow profiles and space-constrained layouts.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar synchronous step-down converter applications.

Compared with RT6220AGQW and TPS54332DDA, the MP2393GTL-P offers superior transient response via COT architecture, integrated PG for reliable sequencing, and smaller SOT583 footprint-making it optimal for next-generation compact consumer electronics where size, speed, and system-level coordination are critical.

Availability

MP2393GTL-P is available at Aetrix Electronics and suitable for game console power management, digital set-top box SoC supplies, flat-panel display logic boards, and industrial HMI subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2393GTL-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 MP2393 belongs to MPS's high-density synchronous buck converter product line, engineered specifically for space-constrained consumer electronics demanding high efficiency, fast transient response, and seamless power sequencing in 1–3A PoL applications.

FAQ

What is the minimum recommended input capacitance for MP2393GTL-P?

The datasheet specifies a minimum 22µF X5R/X7R ceramic capacitor at the IN pin, placed as close as possible to pins 2 (IN) and 4 (GND). This value ensures adequate high-frequency decoupling for 650kHz switching and limits input voltage ripple to <100mV under 3A load steps. Larger values (e.g., 44µF) further reduce ripple but require careful layout to avoid resonance with parasitic inductance.

Can MP2393GTL-P operate with a 3.3V input supply?

No. The absolute minimum input voltage is 4.2V per the Recommended Operating Conditions table. At 3.3V, the device remains in under-voltage lockout (UVLO) due to its 4V rising threshold, and will not initiate switching. For sub-4.2V applications, consider the MP2315 or MP2330 series, which support down to 2.5V or 3V input respectively.

How does the MP2393GTL-P handle pre-biased outputs during startup?

It supports monotonic pre-bias start-up: when the FB node is pre-charged, the internal soft-start voltage (VSS/2) is compared against the sensed output. If VSS/2 exceeds FB, the controller begins switching without reverse current flow. The BST capacitor is actively refreshed during this phase, ensuring high-side gate drive integrity even with initial VOUT > VIN×D.

What is the purpose of the resistor between SW and BST pins?

No external resistor is required between SW and BST. The BST pin connects directly to a 1µF ceramic capacitor whose other terminal ties to SW. An internal charge pump and regulator (U2 in Figure 3) automatically maintains ~3.3V across the BST capacitor relative to SW-enabling high-side N-MOSFET gate drive without external components.

Does MP2393GTL-P support forced PWM mode to eliminate frequency variation at light loads?

No. The device defaults to Power-Save Mode (PSM) under light loads (<300mA), reducing switching frequency to maintain efficiency. There is no pin or register to force continuous PWM operation. For applications requiring fixed-frequency operation across all loads, consider the MP2338 or MPQ4436, which offer selectable PFM/PWM modes via external configuration.

What thermal resistance values apply to the SOT583 package in real-world PCB layouts?

The datasheet lists θJA = 55°C/W on a 2-layer EV2330 evaluation board (64mm×48mm). In typical 4-layer production PCBs with 2oz copper and 6+ thermal vias under the exposed pad, measured θJA improves to 35–42°C/W. For thermal design, assume 45°C/W worst-case to ensure TJ stays ≤125°C at 3A full load and 60°C ambient.

How is output voltage accuracy affected by feedback resistor tolerance?

With 805mV ±16mV reference and typical 1% R1/R2 resistors, total output error is dominated by resistor ratio mismatch. Using matched 0.5% thin-film resistors reduces total error to ±1.2% at room temperature. At –40°C to +125°C, ±100ppm/°C drift adds up to ±0.8% additional error, resulting in ±2.0% worst-case VOUT deviation across temperature and tolerance.