MPQ3428A-AEC1 3-20V, 19A, 600kHz Synchronous Boost Converter QFN-22

MPQ3428A-AEC1 3-20V, 19A, 600kHz Synchronous Boost Converter QFN-22

The MPQ3428A is an Automotive AECQ application device with 600kHz, fixed-frequency, high-efficiency, wide input range, current mode boost converter, optional input disconnect and an input average current limit function.

Key Specifications

Features

• Guaranteed Industrial/Automotive Temp
• 3V to 20V Wide Input Range
• Integrated 18mΩ Low-Side Power FET
• SDR Driver for Synchronous Solution
• 19A Internal Switch Current Limit or External Programmable Input Current Limit
• Input Disconnect and Output SCP
• External Soft Start and Compensation for Higher Flexibility
• Programmable UVLO and Hysteresis
• <1µA Shutdown Current
• Thermal Shutdown at 150°C

Typical Application Circuit

Applications

• Industrial Automotive Applications
• Smart latch
• Telematics

Design Notes

• Size the inductor for the ripple current at the actual switching frequency, typically 30% of the DC load — not for the DC rating alone.
• The hot loop from input capacitor through the switch to ground sets conducted EMI. Keep that copper area as small as the layout allows.
• Output ripple is set by the capacitor ESR and its DC-bias derating; a 10 µF ceramic often behaves like 4 µF at the rated output voltage.
• Route the feedback divider from the output capacitor terminals, away from the switch node.

Common Questions