MAX17531
4V to 42V, 50mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter with 22µA No-Load Supply Current
42V, Low IQ Synchronous Buck Regulator Enables High Efficiency
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Overview
Features and Benefits
- Reduces External Components and Total Cost
- No Schottky–Synchronous
- Internal Compensation for Any Output Voltage
- Built-In Soft-Start
- All-Ceramic Capacitors, Compact Layout
- Reduces Number of DC-DC Regulators to Stock
- Wide 4V to 42V Input
- Adjustable 0.8V up to 0.9 x VIN Output
- 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization
- Reduces Power Dissipation
- 22µA Quiescent Current
- Peak Efficiency > 90%
- PFM Enables Enhanced Light-Load Efficiency
- 1.2µA Shutdown Current
- Operates Reliably in Adverse Environments
- Peak Current Limit Protection
- Built-In Output Voltage Monitoring Active-Low RESET
- Programmable EN/UVLO Threshold
- Monotonic Startup in to Prebiased Load
- Overtemperature Protection
- High Industrial -40℃ to +125℃ Ambient Operating Temperature Range / -40℃ to +150℃ Junction Temperature Range
Product Details
The MAX17531 high-efficiency, high-voltage, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 4V to 42V input. The converter can deliver up to 50mA and generates output voltages from 0.8V up to 0.9 x VIN. The feedback (FB) voltage is accurate to within ±1.75% over -40°C to +125°C.
The MAX17531 uses peak-current-mode control and can be operated in pulse-width modulation (PWM) or pulse-frequency modulation (PFM) modes.
The device is available in a 10-pin (3mm x 2mm) TDFN and 10-pin (3mm x 3mm) µMAX® packages. Simulation models are available.
Applications
- Battery-Powered Equipment
- High-Voltage LDO Replacement
- HVAC and Building Control
- Industrial Sensors and Process Control
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 (2)
Documentation & Resources
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UG-5861: EE-SIM Design and Simulation Environment User Guide5/5/2014PDF3M
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.
SIMPLIS Models
Design Resources
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PCN-PDN Information
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