Analog Devices Inc./Maxim Integrated MAX17570CATA+T

Overview

MAX17570CATA+T from Analog Devices is a 4.5V–60V input, 300mA synchronous step-down DC-DC converter in an 8-pin 2mm × 2mm TDFN package, featuring internal MOSFETs, fixed 3.3V output (per MAX17570C variant), 95.8% peak efficiency at 15V_IN/12V_OUT, and integrated soft-start. It delivers regulated power in space-constrained industrial control and automotive asset-tracking systems.

For engineers reviewing the MAX17570CATA+T datasheet, MAX17570CATA+T pinout, MAX17570CATA+T application, or MAX17570CATA+T equivalent, key selection considerations include its 0.9V–97% V_IN adjustable/fixed-output capability, hiccup-mode overcurrent protection, open-drain RESET output with 92–95% V_OUT thresholds, and PFM operation for light-load efficiency in battery-backed or low-quiescent systems.

Technical Context

The MAX17570CATA+T implements current-mode control with internal slope compensation and a fixed 0.9V feedback reference (confirmed for MAX17570C). Its dual-MOSFET architecture integrates a 1.38Ω high-side pMOS and 0.5Ω low-side nMOS, enabling full synchronous rectification without external Schottky diodes.

It supports programmable switching frequency from 200kHz to 1MHz via RT/SYNC resistor, includes monotonic startup into prebiased outputs, and features hiccup-mode current limiting triggered by either 0.66A runaway current or V_FB dropping to 64.5% of regulation-ensuring robust fault recovery in harsh environments.

Key Specifications

Pinout & Package

Package: 8-pin, 2mm × 2mm TDFN (exposed pad), RoHS-compliant, thermal resistance θ_JA = 162°C/W (4-layer board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with LM5164QDDARQ1 and TPS54202HDDCR, the MAX17570CATA+T uniquely combines ultra-wide 4.5–60V operation, fully integrated PFM/PWM control, and 2mm × 2mm footprint - making it optimal for space-constrained, high-input-voltage industrial and aftermarket automotive applications where component count and thermal management are critical.

Availability

MAX17570CATA+T is available at Aetrix Electronics and suitable for factory automation sensors, aftermarket automotive asset trackers, and ruggedized HMI power rails requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX17570CATA+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

Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX17570 belongs to Analog Devices' high-voltage DC-DC converter product line, designed specifically for reliable, compact, and efficient power conversion in harsh industrial and automotive environments where wide input range and robust protection are essential.

FAQ

What output voltage does the MAX17570CATA+T deliver?

The MAX17570CATA+T is the MAX17570C variant and delivers a fixed 3.3V output. This is confirmed by the Electrical Characteristics table specifying V_FB-REG = 0.90V (typ) and the Functional Diagram showing 0.855V reference for MAX17570C/MAX17570F, combined with internal resistor divider configuration. No external feedback resistors are required for this output setting.

Does the MAX17570CATA+T support external clock synchronization?

No, the MAX17570CATA+T does not support external clock synchronization. As stated in the datasheet's "Detailed Description" section, SYNC functionality is explicitly disabled in PFM parts - and MAX17570C is a PFM variant (alongside D/E/F). The RT/SYNC pin functions only as a timing resistor input for frequency programming, not as a sync input.

What is the maximum junction temperature and thermal shutdown behavior of the MAX17570CATA+T?

The MAX17570CATA+T has a maximum junction temperature of +150°C and activates thermal shutdown at +166°C (rising threshold). Once triggered, the device disables both MOSFETs and remains off until the junction cools by 20°C hysteresis (i.e., to ≤146°C), after which normal operation resumes automatically - providing self-protecting operation under sustained overload or poor heatsinking.

How does the MAX17570CATA+T handle startup into a prebiased output?

The MAX17570CATA+T supports monotonic startup into a prebiased output without discharging the output capacitor. This is achieved through controlled gate drive sequencing that prevents reverse current flow during soft-start. The feature is explicitly documented in the "Startup into a Prebiased Output" section and is especially valuable in multi-rail systems where downstream ICs retain residual charge on their supplies.

What protection features are built into the MAX17570CATA+T?

The MAX17570CATA+T includes hiccup-mode overcurrent protection (triggered by 0.66A runaway current or V_FB <64.5%), open-drain RESET output with 92–95% V_OUT thresholds, programmable EN/UVLO, overtemperature shutdown (+166°C), and monotonic startup. All protections operate autonomously without external components - enhancing system reliability in unattended industrial deployments.