Analog Devices / Maxim Integrated MAX42402/MAX42403 Synchronous Buck Converters
Analog Devices Inc. MAX42402/MAX42403 Synchronous Buck Converters are tiny synchronous buck converters with integrated high-side and low-side switches. The MAX42402/MAX42403 are designed to deliver up to 2.5A/3.5A with a wide, 4.5V to 36V input voltage range. Voltage quality can be monitored by observing the PGOOD signal. The IC can operate in dropout by running at a 99% duty cycle, making it ideal for industrial applications. The MAX42402/MAX42403 offer externally programmable output voltage. Fixed internal frequency options of 1.5MHz/400kHz are available, allowing small external components and reduced output ripple.
When SYNC is low, the MAX42402/MAX42403 automatically enters skip mode at light loads with an ultra-low quiescent current of 27uA at no load. A pin-selectable forced-PWM mode is also available, which helps to improve EMI performance. The devices have a spread-spectrum frequency modulation option designed to minimize EMI-radiated emissions due to the modulation frequency. The Analog Devices Inc. MAX42402/MAX42403 are available in a small, 3mm x 3mm FC2QFN package and use very few external components.
Features
- Multiple functions for small-size
- 4.5V to 36V operating input voltage range
- Synchronous DC-DC converter with integrated FETs up to 2.5A/3.5A
- 27μA quiescent current in skip mode
- 1.5MHz/400kHz switching frequency
- Spread-spectrum option
- 3.5ms (1.5MHz)/2.5ms (400kHz) internal soft-start
- Programmable 0.8V to 12V output voltage range
- 99% duty cycle operation with low dropout
- High precision for safety-critical applications
- Precision enable thresholds for fully programmable UVLO thresholds
- Accurate windowed PGOOD
- Forced-PWM and skip operation
- Overtemperature, overvoltage, and short-circuit protection
- 3mm x 3mm FC2QFN package
- -40°C to +125°C operating temperature range
Applications
- Industrial automation
- Point-of-Load
- Distributed DC power systems
Simplified Block Diagram
Publicerad: 2023-09-29
| Uppdaterad: 2024-08-05