Analog Devices Inc./Maxim Integrated MAX17502HAUD+

Overview

MAX17502HAUD+ from Maxim Integrated is a 60V input, 1A synchronous step-down DC-DC converter with integrated high-side pMOS and low-side nMOS FETs, delivering adjustable output from 0.9V to 96.5% of VIN. It operates at 300kHz fixed frequency, achieves >90% peak efficiency, and maintains ±1.7% output voltage accuracy across –40°C to +125°C ambient. It powers industrial point-of-load rails in HVAC controllers and telecom base stations.

For engineers reviewing the MAX17502HAUD+ datasheet, MAX17502HAUD+ pinout, MAX17502HAUD+ application, or MAX17502HAUD+ equivalent, this page delivers verified electrical parameters, validated TDFN-10 package mapping, confirmed soft-start/RESET/EN/UVLO functionality, and real-world thermal and current-limit behavior under industrial operating conditions.

Technical Context

The MAX17502HAUD+ uses peak-current-mode control with internal transconductance error amplifier (GM = 590 µS typ), slope compensation, and fixed-frequency PWM. Its dual-MOSFET power stage features 0.85Ω high-side pMOS and 0.35Ω low-side nMOS on-resistance at +25°C, enabling high efficiency without external Schottky diodes.

It integrates EN/UVLO with resistor-programmable threshold (1.218V typ rising), open-drain RESET with 92.5%–95.5% VOUT monitoring window and 1024-cycle delay, and programmable soft-start via external capacitor on SS pin. Thermal shutdown activates at +165°C with 10°C hysteresis.

Key Specifications

Pinout & Package

MAX17502HAUD+ is housed in a 10-pin, 3mm × 2mm TDFN package with exposed pad (EP) connected to GND for thermal enhancement. Pin count and layout match JEDEC MO-229WAA standard.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QDDARQ1 and MPQ4420AGL-A, the MAX17502HAUD+ uniquely combines industrial-grade accuracy (±1.7%), integrated RESET with programmable thresholds, hiccup-mode fault recovery, and prebiased startup-all in a 3mm × 2mm TDFN package-making it optimal for space-constrained, reliability-critical industrial power nodes.

Availability

MAX17502HAUD+ is available at Aetrix Electronics and suitable for industrial process control, telecom infrastructure, and battery-powered equipment requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for MAX17502HAUD+ 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 high-performance analog and mixed-signal ICs for industrial, automotive, and communications markets.

The MAX17502HAUD+ belongs to Maxim's high-voltage synchronous buck regulator product line, engineered specifically for rugged industrial point-of-load conversion where wide input range, small footprint, and robust fault handling are essential.

FAQ

What is the maximum output voltage range supported by the MAX17502HAUD+?

The MAX17502HAUD+ supports an adjustable output voltage from 0.9V up to 96.5% of the input voltage (VIN), as confirmed in the Electrical Characteristics table for the H version. This differs from fixed-output variants (E/F/G) and enables flexible rail generation across varying input conditions without changing components. The feedback reference is 0.9V, and regulation accuracy remains ±1.7% over temperature.

Does the MAX17502HAUD+ support startup into a prebiased output?

Yes, the MAX17502HAUD+ supports prebiased output startup. During initial power-up, both high-side and low-side MOSFETs remain off until the PWM comparator commands the first pulse, preventing reverse current flow. This behavior is explicitly documented in the Detailed Description section and validated in typical operating waveforms (Figure MAX17502 toc17/toc18). It ensures safe operation when powering systems with backup capacitors or shared rails.

What is the purpose of the N.C./COMP pin on the MAX17502HAUD+?

On the MAX17502HAUD+, the N.C./COMP pin (Pin 9) serves as the compensation node for external loop stabilization. Unlike fixed-output versions (E/F), the H variant requires an RC network (RZ and CZ) connected from this pin to GND to ensure closed-loop stability across the full 0.9V–96.5%VIN range. The values are calculated using fSW = 300kHz and the selected inductor per Maxim's application guidance in the datasheet.

How does the RESET output of the MAX17502HAUD+ behave during thermal shutdown?

The RESET output of the MAX17502HAUD+ goes low during thermal shutdown, as stated in the RESET section of the datasheet. This provides a direct hardware indication of thermal fault condition to the host system. RESET remains low until the junction temperature falls below the hysteresis threshold (155°C), the device exits shutdown, soft-start completes, and FB rises above 95.5% of the regulated voltage for 1024 clock cycles.

Can the MAX17502HAUD+ operate with all-ceramic output capacitors?

Yes, the MAX17502HAUD+ is designed for all-ceramic output capacitor operation. The datasheet explicitly lists "All-Ceramic Capacitors, Ultra-Compact Layout" as a key benefit and recommends X7R dielectric for industrial temperature stability. For adjustable-output configurations, output capacitance is sized based on load-step response requirements, and the internal compensation supports stable operation with low-ESR ceramic types without added series resistance.