Analog Devices / Maxim Integrated MAX17682 Iso-Buck DC-DC Converters
Analog Devices MAX17682 Iso-Buck DC-DC Converters are high-voltage, high-efficiency, iso-buck DC-DC converters designed to provide isolated power up to 10W. The device operates over a wide 4.5V to 42V input voltage range and uses primary-side feedback to regulate the output voltage. These devices deliver primary peak current up to 3.7A and regulate the primary output voltage to within ±1.2% over -40°C to 125°C. The MAX17682 features peak-current-mode control with pulse-width modulation (PWM) scheme. The low-resistance, on-chip MOSFETs ensure high efficiency at full load and simplify the layout.
A programmable soft-start feature allows users to reduce input inrush current. The device also incorporates an output Enable/Under Voltage Lockout pin (EN/UVLO) that allows the user to turn on the part at the desired input voltage level. An open-drain, active-low RESETB pin provides a delayed power-good signal to the system upon achieving successful regulation of the primary output voltage.
Features
- Eliminates External Components and Reduces Total Cost
- Synchronous Primary Operation for High Efficiency and Reduced Cost
- All-Ceramic Capacitors, Ultra-Compact Layout
- Reduces Number of DC-DC Regulators to StockWide 4.5V to 42V Input Voltage Range
- 0.9V to 92% VIN Primary Output Voltage
- Delivers up to 3.7A Peak Current
- 100kHz to 500kHz Adjustable Frequency with External Synchronization
- Available in a 20-pin, 4mm x 4mm TQFN Package
- Reduces Power DissipationPeak Efficiency > 90%
- Shutdown Current = 2.8µA (typical)
- Operates Reliably in Adverse Industrial Environments
- Hiccup-Mode Current Limit, Sink Current Limit, and Auto-Retry Startup
- Programmable EN/UVLO Threshold
- Adjustable Soft-Start
- -40°C to 150°C Junction Temperature Range
Applications
- Industrial Process Control
- Communication Hub in Smart meters
- Isolated Power Supplies in Medical Equipment
- Floating Power Supply Generation
MAX17682 Functional Block Diagram
Associated Tool
Analog Devices / Maxim Integrated MAX17682EVKIT Evaluation Kit
Fully assembled and tested circuit board that demonstrates the performance of the MAX17682.
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Publicado: 2017-06-06
| Actualizado: 2023-04-11