Monolithic Power Systems Inc. MP2362DF-LF-Z

Overview

MP2362DF-LF-Z from Monolithic Power Systems is a dual-channel synchronous step-down DC/DC converter with integrated 0.18Ω high-side and 10Ω low-side MOSFETs per channel, delivering 2A continuous output current per channel across 4.75V–23V input range, fixed 380kHz switching frequency, and independent frequency synchronization up to 1.2MHz - used for I/O and core voltage regulation in set-top boxes and cable modems.

For engineers reviewing the MP2362DF-LF-Z datasheet, MP2362DF-LF-Z pinout, MP2362DF-LF-Z application, or MP2362DF-LF-Z equivalent, key selection criteria include per-channel enable/UVLO thresholds (2.50V rising), thermal shutdown at 160°C, 40µA shutdown quiescent current, and TSSOP20-EP package layout requirements for dual-phase power delivery.

Technical Context

The MP2362 operates in current-mode control with internal transconductance error amplifiers (GEA = 500–1100 µA/V) and slope-compensated peak-current sensing, enabling fast transient response and stable loop behavior with ceramic output capacitors. Each channel features independent EN/UVLO (2.50V threshold, 210mV hysteresis) and SYNC inputs with 11kΩ internal pull-down.

It integrates dual high-side (R_DS(ON) = 0.18Ω) and low-side (R_DS(ON) = 10Ω) MOSFETs, supports adjustable output voltages from 1.22V to 16V via resistive feedback dividers, and provides cycle-by-cycle overcurrent protection with 2.4–3.4A current limit and short-circuit foldback at 20–54kHz.

Key Specifications

Pinout & Package

MP2362DF-LF-Z is housed in a thermally enhanced TSSOP20 with exposed pad (θ_JA = 40°C/W, θ_JC = 6°C/W), requiring soldered thermal pad connection to PCB ground plane for reliable 2A/channel operation at full load and ambient up to +85°C.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MP2362DF-LF-Z, MP2365DJ-LF-Z trades thermal margin and synchronization for higher current density in smaller footprint, while RTQ2132B-QT adds automotive reliability at the cost of integration and design simplicity.

Availability

MP2362DF-LF-Z is available at Aetrix Electronics and suitable for distributed power systems, I/O and core supplies, and broadband communication equipment requiring stable component supply across extended temperature and volume production cycles.

Supply support for MP2362DF-LF-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 automotive applications.

The MP2362 belongs to MPS's integrated DC/DC converter product line, designed specifically for space-constrained consumer and broadband equipment needing dual, efficient, and easily synchronized voltage regulation.

FAQ

What is the maximum recommended output current per channel under continuous operation?

The MP2362DF-LF-Z is rated for 2A continuous output current per channel at T_A ≤ +85°C with proper PCB thermal design - including soldered exposed pad, ≥1 sq-in 1oz copper, and minimal trace resistance. Derating is required above +85°C ambient or with inadequate copper area.

Can both channels be synchronized to the same external clock source?

Yes - SYNCA (Pin 1) and SYNCB (Pin 11) each accept an external clock signal up to 1.2MHz. Both can be driven from a single oscillator output, enabling phase-aligned or interleaved operation to reduce input capacitor RMS current and improve EMI performance.

Is an external bootstrap diode required for standard operation?

No - the MP2362DF-LF-Z operates reliably with internal bootstrap charging for typical duty cycles. An external Schottky diode (e.g., IN4148) is only recommended when V_OUT/V_IN > 65% (e.g., 5V out from 7V in) to maintain gate drive strength and efficiency.

What is the minimum output voltage achievable with the internal feedback reference?

The internal 1.222V reference sets the lower bound: with standard resistor divider topology, the minimum regulated output is 1.222V. Output voltages below this require external reference injection or alternative topology - not supported by default configuration.

How does the MP2362 handle overcurrent events on one channel?

Each channel has independent cycle-by-cycle current limiting (2.4–3.4A) and thermal shutdown. Overcurrent on Channel A disables only that channel's switching; Channel B continues normal operation unless its own fault condition occurs.

What PCB layout practices are critical for stable operation?

Three practices are essential: (1) separate SGND and PGND planes tied at single point near EXPOSED PAD; (2) keep FB and COMP traces short and away from SW nodes; (3) place input capacitors within 5mm of INA/INB pins with low-inductance connections to PGA/PGB.

Does the MP2362DF-LF-Z support output voltage sequencing between channels?

No - ENA and ENB are independent enable inputs but lack built-in sequencing control (e.g., delay timers or tracking). External RC networks or dedicated sequencer ICs are required to enforce power-up/down order between channels.