Automotive 2A Buck Regulator with Low-Iq Mode and PFM/PWM Control

• Automotive AEC-Q100 qualified
• Withstands surge input to 40 V_IN for load dump
• Operates down to 3.4 V_IN (typ), 3.6 V_IN (max) for idle stop
• Utilizes pulse-frequency modulation (PFM) for low-IQ mode
• 10 μA Sleep mode (automatic PWM / Low-IQ PFM mode selection)
• Fixed output voltage options: 3.3 or 5 V with ±1% accuracy
• Delivers up to 2 A of output current
• Integrated 110 mΩ high-side MOSFET
• Adjustable switching frequency from 300 kHz to 2.4 MHz
• EMI reduction features:
  • Frequency dithering
  • Controlled switching node
• External synchronization capability
• Maximum duty cycle for low dropout
• Active low NPOR output with 7.5 ms delay
• Pre-bias startup capable: V_OUT increases monotonically, will not cause a reset
• External compensation for maximum flexibility
• Stable with ceramic or electrolytic output capacitors
• Internally fixed soft-start time of 5 ms
• Pulse-by-pulse current limit, hiccup mode short-circuit, and thermal protections
• Pin open/short and component fault tolerant
• –40°C to 150°C operating junction temperature range
• Thermally enhanced DFN-10 surface-mount package

Typical Applications

Automotive:

• Instrument clusters
• Audio systems
• Navigation
• HVAC
• Home Audio
• Network and Telecom
• Industrial