Monolithic Power Systems Inc. MP2223GJ-P

Overview

MP2223GJ-P from Monolithic Power Systems is a dual-channel synchronous step-down DC/DC converter with integrated 70mΩ/50mΩ (Ch1) and 100mΩ/60mΩ (Ch2) MOSFETs, delivering 3A and 2A continuous output current respectively across a 4.5V–18V input range. It operates at a fixed 540kHz switching frequency with 180° out-of-phase channel timing to reduce input ripple, and features independent enable pins (EN1/EN2), power-save mode, and hiccup-mode over-current protection - deployed in notebook I/O power and flat-panel display bias rails.

For engineers reviewing the MP2223GJ-P datasheet, MP2223GJ-P pinout, MP2223GJ-P application, or MP2223GJ-P equivalent, key selection considerations include channel-specific R_DS(ON), phase-shifted operation for EMI reduction, dual soft-start timing (0.8ms), thermal shutdown (150°C), and feedback reference accuracy (±1.5% at 800mV).

Technical Context

The MP2223GJ-P implements current-mode control with internal slope compensation and dual independent error amplifiers referenced to a precision 0.8V bandgap. Each channel uses cycle-by-cycle peak current limiting with programmable thresholds (3.5–5.4A for Ch1; 2.5–4.4A for Ch2) and zero-crossing detection (–50mA) to prevent reverse inductor current.

Its 180° phase shift is enforced only when both channels operate in CCM; under light load, AAM mode reduces switching frequency dynamically. The device integrates bootstrap regulators for high-side gate drive, UVLO (4.1V rising / 3.9V falling), OVP (123% V_REF with 15% hysteresis), and thermal shutdown with 20°C hysteresis.

Key Specifications

Pinout & Package

MP2223GJ-P is housed in an 8-pin TSOT23 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density PCB layouts with exposed thermal pad (GND-connected) for enhanced thermal dissipation (θ_JA = 100°C/W on 4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with RTQ2132B-QT and TPS54290RGTR, MP2223GJ-P delivers superior light-load efficiency via AAM, smallest PCB footprint (TSOT23-8), and lowest component count - making it optimal for space-constrained consumer electronics where 3A/2A dual-rail delivery and EMI control are primary requirements.

Availability

MP2223GJ-P is available at Aetrix Electronics and suitable for notebook I/O power, digital set-top box SoC bias, and flat-panel display logic board applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for MP2223GJ-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 analog and mixed-signal ICs for power management, motion control, and automotive applications.

The MP2223 belongs to MPS's high-density DC/DC converter product line, designed specifically for space-constrained consumer and computing systems requiring dual-rail, low-noise, and thermally robust power delivery.

FAQ

What is the maximum allowable input voltage for MP2223GJ-P?

The absolute maximum input voltage is 20V, but the recommended operating range is 4.5V to 18V. Exceeding 18V risks violating the 24V transient limit on SW pins (for <10ns), potentially damaging internal MOSFETs or gate drivers.

Can MP2223GJ-P operate with pre-biased outputs?

Yes - MP2223GJ-P supports monotonic pre-bias start-up. Its soft-start circuitry senses the FB voltage during ramp-up and sequences high-side/low-side switches to avoid reverse current flow, ensuring safe startup into existing output voltages.

How does the 180° phase shift affect input capacitor selection?

When both channels operate in CCM, 180° phase shift reduces input ripple current amplitude by ~50% compared to in-phase operation. This allows use of smaller 10–22µF X5R/X7R ceramic capacitors instead of larger 47–100µF bulk types, lowering cost and board area.

What is the purpose of the 400mV FB clamp during short-circuit?

The 400mV clamp on FB1/FB2 triggers oscillator frequency reduction during output shorts, preventing current-limit runaway by limiting duty cycle. This maintains controlled hiccup-mode recovery rather than unregulated high-current latching.

Is thermal derating required for continuous 3A/2A operation?

Yes - at ambient temperatures above 60°C, output current must be derated per the θ_JA = 100°C/W curve. At 85°C ambient, max continuous current drops to ~2.4A/1.6A to keep junction temperature below 125°C under typical PCB layout conditions.

Does MP2223GJ-P require external compensation components?

No - the MP2223GJ-P integrates full Type-II compensation with optimized internal network. Only external feedback resistors and output LC components are needed, simplifying design and improving stability across varied capacitor ESR ranges.

What is the minimum recommended output capacitance for stable regulation?

For ceramic output capacitors, ≥22µF per channel is recommended (e.g., 2×22µF for Ch1, 1×22µF for Ch2). Lower values risk instability due to insufficient phase margin; tantalum or polymer alternatives require ≥47µF to compensate for higher ESR.