Analog Devices Inc./Maxim Integrated MAX17760ATC+T

Overview

MAX17760ATC+T from Analog Devices is a Himalaya-series synchronous step-down DC-DC converter IC with integrated high-side pMOS and low-side nMOS FETs, operating from 4.5V to 76V input and delivering up to 300mA output current. It supports programmable output voltage from 0.8V to 88% of VIN, features peak-current-mode control, and achieves 93% peak efficiency in PWM mode. It is used in industrial control power supplies where wide-input, compact, and thermally robust regulation is required.

For engineers reviewing the MAX17760ATC+T datasheet, MAX17760ATC+T pinout, MAX17760ATC+T application, or MAX17760ATC+T equivalent, key selection criteria include its 4.5–76V input range, 300mA output capability, 200–600kHz programmable switching frequency, ±1.7% feedback regulation accuracy over –40°C to +125°C, and integrated hiccup-mode overload protection.

Technical Context

The MAX17760ATC+T implements a peak-current-mode control architecture with internal transconductance error amplifier, slope compensation, and clock-synchronized PWM comparator. Its MODE pin latches operation at power-up into either forced PWM (constant frequency, negative inductor current allowed) or PFM (pulse-skipping, enhanced light-load efficiency, no negative current).

It integrates dual LDOs - INT-LDO (powered from VIN) and EXT-LDO (powered from EXTVCC) - with automatic switchover at ~4.74V; VCC is regulated to 5.0V ±2.5% and powers all internal circuitry and gate drivers. The device includes built-in open-drain RESET with 92%/95% FB threshold hysteresis and 2.1ms delay, plus thermal shutdown at 160°C with 20°C hysteresis.

Key Specifications

Pinout & Package

MAX17760ATC+T is housed in a 12-pin, 3mm × 3mm TDFN package with exposed pad (EP) for thermal dissipation. The package has θ_JA = 41°C/W on a four-layer board and requires EP connected to SGND with ≥6 thermal vias.

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 TPS54340DDAR, the MAX17760ATC+T delivers superior integration (no external FETs or compensation), wider input range (up to 76V), and dedicated industrial features (hiccup OCP, EXTVCC, prebiased start), making it optimal for space-constrained, high-voltage, low-to-moderate current applications.

Availability

MAX17760ATC+T is available at Aetrix Electronics and suitable for industrial control power supplies, general-purpose point-of-load regulation, and distributed supply regulation requiring stable component supply across extended temperature and voltage ranges.

Supply support for MAX17760ATC+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, Inc. is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving industrial, automotive, communications, and healthcare markets.

The MAX17760ATC+T belongs to the Himalaya power management product line, designed specifically for cooler, smaller, and simpler high-voltage DC-DC solutions in harsh industrial environments.

FAQ

What is the maximum duty cycle supported by the MAX17760ATC+T?

The MAX17760ATC+T supports a maximum duty cycle of 93% (typical), with a guaranteed minimum of 88%. This enables operation at high step-down ratios - for example, generating 5V from a 48V input (10.4% duty) or 12V from 76V (15.8%) - while maintaining stable regulation and avoiding minimum on-time limitations. The actual achievable duty cycle depends on input voltage, output voltage, and switching frequency selection.

Does the MAX17760ATC+T require external compensation components?

No, the MAX17760ATC+T integrates full control loop compensation internally. This eliminates the need for external Type-II or Type-III compensation networks (e.g., resistors, capacitors, op-amps), reducing bill-of-materials cost, PCB area, and design validation effort. Stability is guaranteed across the full operating range - including all input voltages, output voltages, and load conditions - without user tuning.

Can the MAX17760ATC+T operate with a precharged output capacitor?

Yes, the MAX17760ATC+T supports prebiased soft-start. When the output is already charged at startup, the IC avoids reverse current flow by disabling the low-side FET until the internal soft-start ramp reaches the output voltage level. This behavior is enabled by default and requires no external configuration - critical for hot-swap applications and redundant power systems where output rails remain live during replacement.

How does the EXTVCC pin improve efficiency in the MAX17760ATC+T?

The EXTVCC pin allows the MAX17760ATC+T to power its internal 5V LDO (VCC) from the output rail instead of VIN when VOUT ≥ 5V. Since VCC supplies gate drivers and internal logic, drawing this current from the regulated output (rather than the high-input rail) reduces overall power dissipation - especially at high VIN (e.g., 48V or 76V). Internal switchover occurs at ~4.74V, and EXTVCC must be filtered per Figure 4 in the datasheet to avoid absolute maximum rating violations.

What protection features are built into the MAX17760ATC+T?

The MAX17760ATC+T includes hiccup-mode overcurrent protection (triggered after 16 consecutive current-limit events, with 51ms timeout), thermal shutdown at 160°C (20°C hysteresis), input undervoltage lockout (programmable via EN/UVLO), output voltage monitoring with open-drain RESET, and overvoltage protection via internal clamp. All protections are fully integrated - no external components required - and operate autonomously without host intervention.