General Description
The MAX17506ATP+ high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated high-side MOSFET operates over a 4.5V to 60V input. The converter can deliver up to 5A and generates output voltages from 0.9V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.4% over -40°C to 125°C. The MAX17506ATP+ uses peak current-mode control. The device can be operated in the pulse-width modulation (PWM), pulse-frequency modulation (PFM), and discontinuous conduction mode (DCM) control schemes. The device is available in a 20-pin (5mm x 5mm) Thin QFN (TQFN) package. Simulation models are available.
Benefits and Features
● Reduces External Components and Total Cost
• No Schottky-Synchronous Operation
• Internal Compensation for Any Output Voltage
• Built-In Soft-Start
• All-Ceramic Capacitors, Compact Layout
● Reduce Number of DC-DC Regulators to Stock
• Wide 4.5V to 60V Input
• Adjustable 0.9V to 0.9 x VIN Output
• 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
● Reduces Power Dissipation
• Peak Efficiency > 95%
• PFM/DCM Modes Enables Enhanced Light-Load Efficiency
• Auxiliary Bootstrap LDO for Improved Efficiency
• 3.5FA Shutdown Current
● Operates Reliably in Adverse Industrial Environments
• Hiccup or Latchoff Mode Overload Protection
• DL to LX Short Detection Feature
• Built-In Output Voltage Monitoring with RESET
• Programmable EN/UVLO Threshold
• Monotonic Startup into Prebiased Load
• Overtemperature Protection
• -40NC to +125NC Operation
Feature
- Reduces Design Complexity, Manufacturing Risks, and Time-to-Market
- Integrated Switching Power Supply Controller and Dual-MOSFET Power Switches
- Integrated Inductor
- Integrated Compensation Components
- Integrated Thermal-Fault Protection
- Integrated Peak Current Limit
- Saves Board Space in Space-Constrained Applications
- Complete Integrated Step-Down Power Supply in a Single Package
- Small Profile 9mm x 15mm x 2.8mm SiP Package
- Simplified PCB Design with Minimal External BOM Components
- Offers Flexibility for Power-Design Optimization
- Wide Input Voltage Range from 4.5V to 42V
- Output-Voltage Adjustable Range from 0.9V to 12V
- Adjustable Frequency with External Frequency Synchronization (100kHz to 1.8MHz)
- Soft-Start Programmable
- Autoswitch PWM, PFM, or DCM Current-Mode Control
- Optional Programmable EN/UVLO
Applications
- Base Station Point-of-Load Regulator
- Distributed Supply Regulation
- FPGA and DSP Point-of-Load Regulator
- HVAC and Building Control
- Industrial Power Supplies
