Monolithic Power Systems Inc. MP2223GJ-Z

Overview

MP2223GJ-Z from Monolithic Power Systems is a dual-channel synchronous step-down DC-DC converter with integrated 70mΩ/50mΩ (Ch1) and 100mΩ/60mΩ (Ch2) power MOSFETs, delivering 3A and 2A continuous output current respectively across a 4.5V–18V input range, operating at 540kHz fixed frequency in an 8-pin TSOT23 package for notebook I/O and flat-panel display power rails.

For engineers reviewing the MP2223GJ-Z datasheet, MP2223GJ-Z pinout, MP2223GJ-Z application, or MP2223GJ-Z equivalent, key selection criteria include channel-phase interleaving (180°), independent enable controls (EN1/EN2), hiccup-mode OCP, thermal shutdown at 150°C, and adjustable 0.8V feedback reference for precise multi-rail regulation.

Technical Context

The MP2223GJ-Z implements current-mode control with internal slope compensation and dual independent error amplifiers, each comparing FB1/FB2 against a precision 0.8V reference to regulate output voltage via PWM duty cycle adjustment. Its two switching channels operate with 180° phase shift in CCM to reduce input ripple current and minimize required input capacitance.

It supports three operational modes-Advanced Asynchronous Mode (AAM) for light-load efficiency, Discontinuous Conduction Mode (DCM), and Continuous Conduction Mode (CCM)-with automatic mode transitions based on load current. Each channel features dedicated soft-start (0.8ms), over-voltage protection (123% VREF), and cycle-by-cycle over-current detection with hiccup recovery.

Key Specifications

Pinout & Package

MP2223GJ-Z is housed in a thermally enhanced 8-pin TSOT23 package (2.9mm × 1.6mm × 0.85mm), optimized for high-density PCB layouts with exposed pad for improved heat 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, MP2223GJ-Z offers lower cost and smaller footprint but lacks AEC-Q100 qualification and symmetrical 3A/3A capability; versus TPS54227DRCR, it delivers fully integrated operation with no external FETs, reducing design complexity and layout risk at the expense of frequency flexibility.

Availability

MP2223GJ-Z is available at Aetrix Electronics and suitable for notebook systems, flat-panel displays, and distributed power systems requiring stable component supply, consistent parametric performance, and long-term production continuity.

Supply support for MP2223GJ-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 analog and mixed-signal ICs for power management, motion control, and interface applications, with global manufacturing and quality certifications.

The MP2223 belongs to MPS's high-density DC-DC converter product line, designed specifically for space-constrained consumer and computing applications requiring dual-rail, low-profile, and thermally efficient power conversion.

FAQ

What is the minimum recommended input capacitance for MP2223GJ-Z?

The datasheet specifies a minimum of 22µF ceramic input capacitor per channel, rated for ≥1.5× the maximum input RMS current. For dual-channel operation at 12V input and full load, two 10µF X5R/X7R 0805 ceramics placed close to IN and GND pins meet requirements while leveraging 180° phase cancellation to reduce effective ripple.

Can MP2223GJ-Z operate with pre-biased outputs?

Yes - MP2223GJ-Z supports monotonic pre-bias start-up. During power-on, its internal soft-start circuit compares the rising SS voltage against the existing FB voltage; only when SS exceeds FB does the high-side FET turn on, preventing reverse current flow and ensuring controlled ramp-up even when output capacitors are pre-charged.

How does the 180° phase shift affect EMI performance?

The 180° interleaved switching reduces fundamental input current ripple amplitude by up to 50% compared to in-phase operation, lowering peak spectral energy at 540kHz and harmonics. This directly eases compliance with CISPR-32 Class B conducted EMI limits and reduces filtering component count.

What is the maximum achievable output voltage accuracy?

With the 0.8V ±1.5% internal reference and typical resistor divider tolerance (1%), total output voltage error is ±2.5% over temperature and line/load conditions. Using 0.5% resistors and tight layout reduces this to ±2.0%, sufficient for most logic and interface rail specifications.

Does MP2223GJ-Z require external compensation components?

No - MP2223GJ-Z features an internally compensated current-mode architecture optimized for standard 1–10µH inductors and 22µF ceramic output capacitors. The integrated compensation eliminates external Type-II/III networks, simplifying design and improving production yield.

What happens during simultaneous over-current on both channels?

Each channel triggers independent cycle-by-cycle OCP. If both enter hiccup mode, they restart asynchronously with staggered intervals due to internal timing variation, preventing synchronized re-attempts that could overload the input source or cause system-level brownout.

Is the TSOT23-8 package RoHS and halogen-free compliant?

Yes - MP2223GJ-Z is lead-free, halogen-free, and fully compliant with EU RoHS Directive 2011/65/EU. MPS confirms green status on its official Quality Assurance portal, with material declarations available upon request for IPC-1752-compliant supply chain reporting.