MPQ2918-AEC1 4-40V Step-Down Controller AEC-Q100 Qualified TSSOP-20

MPQ2918-AEC1 4-40V Step-Down Controller AEC-Q100 Qualified TSSOP-20

The MPQ2918 is a high-voltage, synchronous, step-down controller that steps down voltages directly from up to 40V.

Key Specifications

Features

• Wide 4V to 40V Operating Input Range
• Dual N-Channel MOSFET Driver
• 0.8V Voltage Reference with ±1.5% Accuracy Over Temperature
• Low Dropout Operation: Maximum Duty Cycle at 99.5%
• Programmable Frequency Range: 100kHz - 1000kHz
• External Sync Clock Range: 100kHz - 1000kHz
• 180° Out-of-Phase SYNCO Pin
• Programmable Soft Start (SS)
• Power Good (PG) Output Voltage Monitor
• Selectable Cycle-by-Cycle Current Limit

Typical Application Circuit

Applications

• Automotive

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