4.5V to 60V, 4A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation

The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power supply solutions. The MAX17576, high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operates over an input voltage range of 4.5V to 60V. The converter can deliver up to 4A current. Output voltage is programmable from 0.9V up to 90% of VIN. The feedback voltage regulation accuracy over -40°C to +125°C is ±0.9%. Built-in compensation across the output-voltage range eliminates the need for external compensation components.

The MAX17576 features a peak-current-mode control architecture. The device can operate either in constantfrequency based pulse-width modulation (PWM) or pulsefrequency modulation (PFM), or discontinuous-conduction mode (DCM) control schemes. A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an enable/input undervoltage lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. The MAX17576 offers a low minimum on time that allows high switching frequencies and a small solution size.

The MAX17576 is available in a 24-pin (4mm x 5mm) TQFN-EP package. Simulation models are available.

Applications

* Industrial Control Power Supplies * General Purpose Point-of-Load * Distributed Supply Regulation * Base Station Power Supplies * Wall Transformer Regulation * High-Voltage, Single-Board Systems

* Reduces External Components and Total Cost

* No Schottky-Synchronous Operation * Internal Compensation for Any Output Voltage * All-Ceramic Capacitors, Compact Layout

* Reduces Number of DC-DC Regulators to Stock

* Wide 4.5V to 60V Input * Adjustable Output Voltage Range from 0.9V up to 90% of VIN * 100kHz to 2.2MHz Adjustable Switching Frequency with External Clock Synchronization

* Reduces Power Dissipation

* Peak Efficiency of 94.8% * PFM and DCM Modes Enable Enhanced Light-Load Efficiency * Auxiliary Bootstrap Supply (EXTVCC) for Improved Efficiency * 2.8µA Shutdown Current

* Operates Reliably in Adverse Industrial Environments

* Hiccup Mode Overload Protection and Auto-Retry Startup * Adjustable Soft-Start * Built-In Output-Voltage Monitoring with Active-Low RESET * Programmable EN/UVLO Threshold * Monotonic Startup Into Prebiased Output Load * Overtemperature Protection * Wide -40°C to +125°C Ambient Operating Temperature Range/-40°C to +150°C Junction Temperature Range