MAX20021ATIB/V+

The MAX20021ATIB/V+ is an Automotive quad, low-voltage step-down DC to DC converter in 28 pin TQFN-EP package. This power-management IC (PMIC) integrates four low-voltage, high-efficiency, step-down DC to DC converters. It offers four factory-preset output voltages to achieve ±3% output-voltage accuracy and can deliver up to 1A of current. It features fixed-frequency PWM-mode operation with a switching frequency of 3.2MHz. The low-resistance on-chip switches ensure high efficiency at heavy loads while minimizing critical inductances, making layout a much simpler task with respect to discrete solutions. It offers a spread-spectrum option to reduce radiated emissions. Two of four buck converters operate 180° out-of-phase with the internal clock. This feature reduces the necessary input capacitance and improves EMI as well. All four buck converters operate in constant-PWM mode outside the AM band. It offers a SYNC input to synchronize to an external clock.

• Operates from 3V to 5.5V makes it ideal for automotive point-of-load and post regulation application
• Current configuration is 1A(CH1, CH4), 0.5A(CH2, CH3)
• Output voltage is 3.3V, 1.25V, 2.65/1.8V, 1.8V respectively
• Active time out period is 20,480cycles
• Individual enable inputs and power-good outputs to simplify sequencing
• I/P overvoltage protection, undervoltage monitoring, undervoltage lockout, overtemperature shutdown
• Cycle-by-cycle current limiting
• Soft-start and supply sequencing reduces inrush current
• Internal current sensing and loop compensation reduce board space and system cost
• Operating temperature range from -40°C to +125°C

Poznámky

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