Analog Devices / Maxim Integrated MAX17245 Synchronous Step-Down DC-DC Converter
Analog Devices MAX17245 Synchronous Step-Down DC-DC Converter comes with integrated MOSFETs and operates over a 3.5V to 36V input voltage range with 42V input transient protection. The Analog Devices MAX17245 can operate in dropout condition by running at 98% duty cycle. The converters deliver up to 3.5A and generate fixed output voltages of 3.3V/5V, along with the ability to program the output voltage between 1V to 10V. The MAX17245 uses a current-mode control architecture.
The devices can operate in Pulse-Width Modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency.
The Analog Devices MAX17245 Synchronous Step-Down DC-DC Converter is available in TQFN-16 and TSSOP-16 packages.
Features
- Eliminates External Components and Reduces Total Cost
- Integrated High-Side and Low-Side Switch Enables Synchronous Operation for High Efficiency and Reduced Cost
- All-Ceramic Capacitor Solution Allows Ultra-Compact Solution Size
- 220kHz to 2.2MHz Adjustable Frequency with External Synchronization
- PGOOD Output and High-Voltage EN Input Simplify Power Sequencing
- Increases Design Flexibility
- 180° Out-of-Phase Clock Output at SYNCOUT Enables Cascaded Power Supplies for Increased Power Output
- Fixed Output Voltage with ±2% Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V)
- Reduces Power Dissipation
- >90% Peak Efficiency
- PWM and PFM Operation Optimizes Conversion Efficiency From Heavy to Light Loads
- Automatic LX Slew-Rate Adjustment for Optimum Efficiency Across Operating Frequency Range
- Low 5μA (typ.) Shutdown Current
- Low 28μA (typ.) Quiescent Current
- Operates Reliably
- 42V Input Voltage Transient Protection
- Fixed 8ms Internal Software Start Reduces Input Inrush Current
- Cycle-by-Cycle Current Limit, Thermal Shutdown with Automatic Recovery
- Reduced EMI Emission with Spread-Spectrum Control
Applications
- Distributed Supply Regulation
- Wall Transformer Regulation
- General-Purpose Point-of-Load
Development Tools
Analog Devices / Maxim Integrated MAX17245EVKIT Evaluation Kit
Demonstrates the operation the MAX17245 high-voltage, current-mode step-down converter.
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Typical Application Circuit
Published: 2016-09-16
| Updated: 2023-04-12