Analog Devices Inc./Maxim Integrated MAX17504SATP+T

Overview

MAX17504SATP+T from Maxim Integrated is a high-efficiency, 4.5V–60V input, synchronous step-down DC-DC converter with dual integrated MOSFETs, delivering up to 3.5A output current at 0.9V–90% VIN. It features internal compensation, ±1.1% FB regulation accuracy over –40°C to +125°C, and operates in PWM/DCM/PFM modes. Used in industrial power supplies and high-voltage single-board systems.

For engineers reviewing the MAX17504SATP+T datasheet, MAX17504SATP+T pinout, MAX17504SATP+T application, or MAX17504SATP+T equivalent, this page provides verified technical context, real-world operating parameters, package-specific layout guidance, and validated alternative options for industrial point-of-load designs requiring wide-input, thermally robust, and mode-flexible regulation.

Technical Context

The MAX17504SATP+T implements peak-current-mode control with user-selectable operation modes via the MODE pin: PWM (constant frequency, all loads), PFM (pulse-skipping, high light-load efficiency), or DCM (no pulse-skipping but disables negative inductor current). Its internal compensation eliminates external loop components across the full 0.9V–90% VIN output range.

It integrates a 5V LDO (VCC) with 4.75V–5.25V output, hiccup-mode overcurrent protection with 4.4A–5.85A peak current limit, and an open-drain RESET output asserting when FB falls below 92% of regulation and deasserting after 1024 cycles once FB rises above 95%. Thermal shutdown activates at +165°C with 10°C hysteresis.

Key Specifications

Pinout & Package

MAX17504SATP+T is housed in a 20-pin, 5mm × 5mm TQFN package with exposed pad (EP), RoHS-compliant and lead (Pb)-free. The exposed pad must be soldered to SGND for thermal performance and electrical stability.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QPWPRQ1 and TPS54560BQPWPRQ1, the MAX17504SATP+T delivers identical 4.5V–60V input range and 3.5A output in a fully integrated, mode-flexible package - reducing BOM count by 7 components and eliminating gate-drive design effort while maintaining industrial temperature compliance.

Availability

MAX17504SATP+T is available at Aetrix Electronics and suitable for industrial power supplies, distributed supply regulation, and base station power supplies requiring stable component supply, long-term lifecycle support, and guaranteed RoHS-compliant sourcing.

Supply support for MAX17504SATP+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, communications, and computing applications.

The MAX17504SATP+T belongs to Maxim's high-voltage synchronous buck converter family, engineered for rugged industrial environments where wide input range, thermal resilience, and minimal external components are critical.

FAQ

What is the minimum on-time specification for MAX17504SATP+T, and why does it matter?

The MAX17504SATP+T has a minimum on-time of 135ns. This parameter determines the lowest achievable output voltage at a given input voltage and switching frequency - for example, enabling reliable 3.3V output from a 48V input at 500kHz without pulse skipping. It directly impacts design flexibility in high-step-down-ratio applications like telecom or industrial power distribution.

Can MAX17504SATP+T operate with a pre-biased output, and how is it configured?

Yes, MAX17504SATP+T supports pre-biased soft-start. When the output voltage is already present before startup, the device avoids reverse current by controlling high-side MOSFET turn-on timing. No additional configuration is required - the feature is inherent to its control architecture and activated automatically during EN/UVLO assertion.

How does the RESET pin on MAX17504SATP+T behave during output undervoltage conditions?

The RESET pin on MAX17504SATP+T is an open-drain output that pulls low when the FB voltage falls below 92% of its regulated value (e.g., <0.828V for a 5V output). It remains low until FB rises above 95% (e.g., >0.855V) and then waits 1024 switching cycles before releasing high - providing clean, glitch-free power-good signaling to processors or supervisors.

What is the role of the CF pin on MAX17504SATP+T, and when is it used?

The CF pin on MAX17504SATP+T is a compensation filter terminal used only when the switching frequency is set below 500kHz via the RT resistor. In those cases, a capacitor from CF to FB adjusts loop phase margin. At 500kHz or higher, CF is left open - the internal compensation is fully optimized and no external component is needed.

Does MAX17504SATP+T require external MOSFETs, or are they integrated?

MAX17504SATP+T integrates both high-side and low-side n-channel MOSFETs - with typical RDS(ON) values of 165mΩ (high-side) and 80mΩ (low-side) at ILX = 0.3A. This eliminates the need for external power switches, gate drivers, or bootstrap diodes, reducing total solution size and design complexity compared to controller-only alternatives.