MAXIM MAX20077ATCE/VY+T

MAX20077/MAX25277 is a compact synchronous buck converter with integrated high-side and low-side switches. The device is designed to deliver up to 2.5A (2.0A for the MAX20077ATCC/VY+ variant) from a 3.5V to 36V input voltage, with a quiescent current of only 3.5μA at no load. Over the normal 6V to 18V operating input range, the device provides ±2% accurate output voltage in FPWM mode. With a 20ns minimum on-time capability, the converter supports high step-down conversion ratios. Output voltage quality can be monitored via the PGOOD signal. The device can operate in buck mode at up to 99% duty cycle, making it well suited for automotive and industrial applications. Fixed output voltages of 5V and 3.3V are available. The device can also be configured for 1V to 10V output using an external resistor divider. The switching frequency is internally fixed at 2.1MHz, enabling the use of small external components, reducing output ripple, and guaranteeing interference-free AM band operation. A 400kHz option is also available for minimum switching losses and maximum efficiency. The device automatically enters pulse-skipping mode under light load, with an ultralow quiescent current of only 3.5μA at no load. Pin-selectable spread-spectrum frequency modulation is provided to minimize EMI emissions caused by the modulated frequency. The MAX20077/MAX25277 is available in a compact (3mm × 3mm) 12-pin solderable TDFN package with an exposed pad, requiring minimal external components.

• Synchronous DC-DC converter with integrated FETs
• MAX20077ATCA/VY+/B/D/E output current: 2.5A
• MAX20077ATCC/VY+ output current: 2.0A
• Quiescent current in standby mode: 3.5μA
• Space-saving compact solution
• Minimum on-time: 20ns
• Operating frequency: 2.1MHz or 400kHz
• Programmable output voltage: 1V to 10V, or fixed 5V/3.3V options
• Fixed 3.5ms internal soft-start
• FPWM mode (5V/3.3V) output accuracy ±2%, or external resistor-adjustable feedback accuracy ±1.5% (1V to 10V)
• Innovative current-mode control architecture minimizes total board space and BOM count
• PGOOD output and high-voltage EN input simplify power sequencing
• Protection features and operating range suited for automotive applications
• Input voltage range: 3.5V to 36V
• 40V load dump protection
• 99% duty cycle low dropout operation
• Automotive temperature range: -40°C to +125°C
• AEC-Q100 qualified

• Automotive
• Industrial
• High-Voltage DC-DC Converters