Analog Devices Inc./Maxim Integrated MAX17783CATB+T

Overview

MAX17783CATB+T from Maxim Integrated is a high-efficiency, high-voltage synchronous step-down DC-DC converter with integrated high-side MOSFET, operating from 6V to 60V input and delivering up to 2.5A output current. It supports adjustable output voltages from 0.9V to 90% of VIN, features internal compensation, ±1.6% feedback regulation accuracy over –40°C to +125°C, and uses peak current-mode control for stable operation in industrial power distribution systems.

For engineers reviewing the MAX17783CATB+T datasheet, MAX17783CATB+T pinout, MAX17783CATB+T application, or MAX17783CATB+T equivalent, key selection considerations include its 400kHz–2.2MHz programmable switching frequency, low 3.01µA shutdown current, hiccup-mode overload protection, RESET output with 92.1%–95.4% FB threshold hysteresis, and 10-pin 3mm × 3mm TDFN package with exposed pad for thermal management.

Technical Context

The MAX17783CATB+T implements peak current-mode control with cycle-by-cycle current limiting (4A typical peak, 4.77A runaway) and programmable soft-start via external capacitor. Its internal LDO generates a regulated 5V VCC rail (±5% over load/temperature) to power internal circuitry and recharge the bootstrap capacitor.

It operates in Low Iq mode below light loads-skipping switching cycles until 64 consecutive cycles elapse, then drawing only 205µA quiescent current-while maintaining monotonic startup into prebiased outputs and supporting external clock synchronization within ±40% of programmed fSW. Thermal shutdown triggers at 154°C with 15°C hysteresis.

Key Specifications

Pinout & Package

MAX17783CATB+T is housed in a 10-pin, 3mm × 3mm thermally enhanced TDFN package with exposed pad (EP), optimized for high-power density and thermal dissipation (θJA = 34°C/W on multilayer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QDDARQ1 and TPS546D24RSAR, the MAX17783CATB+T uniquely combines 60V max input, 2.5A capability, integrated high-side FET, RESET output, and internal compensation in a 3mm × 3mm footprint-making it optimal for space-constrained, wide-input industrial buck applications without digital control requirements.

Availability

MAX17783CATB+T is available at Aetrix Electronics and suitable for industrial power distribution, base station power supplies, and LED display power systems requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant sourcing.

Supply support for MAX17783CATB+T 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

Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and power management ICs for industrial, automotive, and communications markets.

The MAX17783CATB+T belongs to the Himalaya series of high-voltage DC-DC regulators, engineered specifically to deliver cooler, smaller, and simpler power solutions for harsh-environment applications demanding wide input range and high reliability.

FAQ

What is the maximum input voltage supported by the MAX17783CATB+T?

The MAX17783CATB+T supports an absolute maximum input voltage of +65V, with guaranteed operation across 6V to 60V. This wide range allows direct regulation from common industrial and telecom bus voltages including 12V, 24V, 36V, and 48V without pre-regulation stages. Exceeding 60V may reduce lifetime reliability per Absolute Maximum Ratings.

Does the MAX17783CATB+T require external compensation components?

No, the MAX17783CATB+T features fully internal compensation, eliminating the need for external RC networks. This simplifies layout, reduces BOM count, and ensures stable loop response across its full operating range of input voltage (6V–60V), output voltage (0.9V–90% of VIN), and load current (0–2.5A), as verified in the device's characterization data.

How does the RESET function operate on the MAX17783CATB+T?

The MAX17783CATB+T's open-drain RESET output asserts low when the FB voltage drops below 92.1% of its regulation setpoint (VFB-REG), and deasserts (goes high-impedance) 1024 switching cycles after FB rises above 95.4% of VFB-REG. An external pullup resistor is required. RESET also pulls low during thermal shutdown or when EN/UVLO falls below its falling threshold (1.088V).

Can the MAX17783CATB+T start up into a prebiased output?

Yes, the MAX17783CATB+T supports monotonic, prebiased-output startup. During initial power-up, the high-side MOSFET remains off until the SS pin voltage exceeds the FB pin voltage, preventing reverse current flow into the output. Once aligned, VFB ramps smoothly to its target, ensuring safe operation in hot-swap and redundant supply configurations.

What thermal protection mechanisms are built into the MAX17783CATB+T?

The MAX17783CATB+T incorporates thermal shutdown that disables switching when junction temperature exceeds +154°C, with 15°C hysteresis (re-enable at +139°C). It also includes hiccup-mode overload protection triggered by runaway current events, limiting average power dissipation during sustained faults. The 10-pin TDFN package with exposed pad and θJA = 34°C/W enables effective heat transfer to PCB ground planes.