Maxim Automotive Electronics Power Management Product Application Circuit

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description:

1.2A step-down converter that keeps wireless or GPS devices working when the car is cold-started

Highly Reliable Automotive Application Step-Down Controller Ultra Low IQ Meets 100μA OEM Module Design Requirements

• Operating current is only 60A (typ) in skip mode, effectively extending battery life
• Wide VIN range of 3.5V to 36V (42V, maximum rated voltage), direct battery powered
• 200kHz to 1MHz adjustable switching frequency eliminates AM band frequency interference
• 100% duty cycle maintains high efficiency and low operating current advantage under transient undervoltage conditions

Ultra-low IQ, automotive application LDO, powering the standby system to effectively extend battery life

45V, 200mA LDO consumes only 20A IQ

Operating over a wide input voltage range (3.5V to 30V), the MAX16910 can withstand up to 45V load shedding and is guaranteed to operate over the automotive temperature range of 40°C to +125°C. The device includes three select pins and the output voltage can be configured to: 5.0V or 3.3V fixed voltage, and 1.5V to 11V adjustable voltage. In addition, the MAX16910 can work with small-sized ceramic capacitors, significantly reducing component cost.

MAX16946*/MAX16947* High-Side Current Sense LDO

• Can withstand up to 45V load-dump supply voltage
• 3.3V to 12V LDO regulated output
• Adjustable current limit (400mA, maximum)

See the PDF document for more details.