MAX17548

PRODUCTION

42V, Dual-Output, Synchronous Step-Down Controller

Wide Input Voltage, Dual-Output Controller Enables Design Flexibility for Industrial Applications

Data Sheet (Rev. 0) Product Selection Table

Part Models: 2
1ku List Price: Starting From $3.45

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Overview

Wide Range of Operation
- Wide 4.5V to 42V Input Voltage Range
- Wide 0.8V to 24V Output Voltage Range
- R_SENSE or Inductor DCR Current Sensing
- Selectable In-Phase or 180° Out-of-Phase Operation
- Adjustable 100kHz to 2.2MHz Switching Frequency
- Independent Enable and PGOOD
- Available in a Lead(Pb)-Free 32-Pin, 5mm x 5mm TQFN-EP Package
Enhances Power Efficiency
- Low-Impedance Gate Drives for High Efficiency
- DCM Operation at Light Loads
- Auxiliary Bootstrap LDO
Operates Reliably in Adverse Industrial Environments
- Independent Adjustable Soft-Start or Tracking
- Current Foldback Limits MOSFET Heat Dissipation During a Short-Circuit Condition
- Operates Over the -40°C to +125°C Temperature Range
- Output Overvoltage and Overtemperature Protections

The MAX17548 is a dual-output, synchronous step-down controller that drives nMOSFETs.

The device features a peak-current-mode, constant frequency architecture, allowing it to operate up to 2.2MHz. The device can be configured as two single-phase, independent 10A power supplies or as a dualphase, single-output 20A power supply. The device also provides the ability to run two controllers 180° out-of-phase to reduce the power loss and noise due to the input-capacitor ESR.

The IC supports current sensing using either an external current-sense resistor for accuracy or an inductor DCR for improved system efficiency. Current foldback limits MOSFET power dissipation under short-circuit conditions.

The IC provides independent adjustable soft-start for each output and can start up monotonically into a prebiased output. The IC can be configured in either PWM or DCM modes of operation, depending on whether constant-frequency operation or light-load efficiency is desired.

The IC operates over the -40°C to +125°C temperature range and is available in a lead(Pb)-free, 32-pin TQFN, 5mm x 5mm package with an exposed pad.

Applications

Computerized Numerical Control
Distributed DC Power Systems
Industrial Power Supplies
Motion Control
Programmable Logic Controllers

Part Models: 2
1ku List Price: Starting From $3.45

Documentation

Data Sheet 1

MAX17548: 42V, Dual-Output, Synchronous Step-Down Controller Data Sheet (Rev.0) 09/25/2017

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX17548ATJ+	32-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX17548ATJ+T	32-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 1
MAX17558	PRODUCTION	60V, Dual-Output, Synchronous Step-Down Controller

Tools & Simulations

EE-Sim Power® Tools 1

The EE-Sim DC-DC Converter Tool uses your requirements to quickly create a complete power design including a schematic, BOM with commercially available parts, and time and frequency domain simulations. Your customized schematic can be downloaded for further analysis in the standalone EE-Sim OASIS Simulator, featuring SIMPLIS and SIMetrix SPICE engines.

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SIMPLIS Models 1

MAX17548 SIMPLIS Schematic

Evaluation Kits

Evaluation Kit for the MAX17548

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Features and Benefits

6V to 42V Input Range
Output Rails: V_OUT1: 5V/5A, V_OUT2: 3.3V/10A
350kHz Switching Frequency
Independent Enable Inputs
Independent Adjustable Soft-Start Time
Configurable Tracking Operation
Selectable PWM/DCM Modes of Operation
Selectable 180° Out-of-Phase/0° In-Phase Operation
Selectable Current-Limit Threshold
Independent PGOOD Outputs
Overcurrent, Overvoltage, and Overtemperature Protection
Proven PCB Layout
Fully Assembled and Tested

Product Details

The MAX17548 EV kit provides a proven design to evaluate the MAX17548 wide 4.5V to 42V input, dual-output, synchronous step-down DC-DC controller. The EV kit provides 5V/5A and 3.3V/10A at the outputs from a 6V to 42V input supply. The switching frequency of the EV kit is preset to 350kHz for optimal efficiency and component size. The EV kit features adjustable input undervoltage-lockout and soft-start time, selectable PWM/DCM modes, 180° out-of-phase/0° in-phase operation, current-limit threshold, and independent open-drain PGOOD signals.