MAX17643
4.5V–60V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation
60V Synchronous Buck Converter with Internal FETs Enables High Efficiency and Low Temperature Rise
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Overview
Features and Benefits
- 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 0.9V to (0.9 × VIN) Output
- Up to 2A Peak-Load Current
- 400kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- Peak Efficiency of 91.6%
- Auxiliary Bootstrap LDO for Improved Efficiency
- 4.65μA Shutdown Current
- Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Overload Protection
- Adjustable Soft-Start
- Built-In Output-Voltage Monitoring with Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup into Prebiased Load
- Overtemperature Protection
- Wide Industrial -40°C to +125°C Ambient Operating Temperature Range/ -40°C to +150°C Junction Temperature Range
- Complies with CISPR32 (EN55032) Class B Conducted and Radiated Emissions
Product Details
The Himalaya series of voltage regulator ICs, power modules, and chargers enable cooler, smaller, and simpler power-supply solutions. The MAX17643 high-efficiency, high-voltage, Himalaya synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input. The converter can deliver up to 2A and generates output voltages from 0.9V up to (0.9 x VIN)V. The feedback (FB) voltage is accurate to within ±.4% over -40°C to +125°C. Built-in compensation across the output- voltage range eliminates the need for external components. The MAX17643 features peak-current-mode control architecture and operates in fixed frequency forced PWM mode. The current-limit settings of the MAX17643 allow the device to supply load-current peaks up to 2A. This allows the device to support pulsed load applications such as communication modules with minimal output-voltage droop. The MAX17643 offers a low minimum on-time that allows high switching frequencies and a smaller solution size.
The device is available in a 12-pin (3mm × 3mm) TDFN 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
- Pulsed-Load Applications
- Communication Modules
Product Lifecycle
Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Evaluation Kits (1)
Documentation & Resources
Tools & Simulations
EE-Sim Power® Tools
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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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.