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AUTOMOTIVE ELECTRONIC SOLUTIONS
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Automotive Electronics High Performance Analog ICs

L i n e a r A u t o m o t i v e S O L UTION S Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 Power Supply Supervisors/Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . 24 Surge Stoppers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Power Monitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 Ideal Diode Controllers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Temperature Sensors . . . . . . . . . . . . . . ....

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Linear Automotive Solutions Introduction Today’s automotive environment demands high input voltage capability, wide operating temperature ranges and efficient thermal management. Consumer expectations and extended warranties demand years of trouble-free operation, so rugged dependable power conversion and management, signal conditioning and data conversion solutions are essential. Linear Technology’s high performance analog ICs provide efficient, compact and dependable solutions for use in all kinds of automotive systems. This selection guide features recommended Linear Technology solutions...

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2 LINEAR AUTOMOTIVE SOLUTIONS 4A, 12V Overvoltage Output Regulator with 150V Surge Protection Surge Stoppers • Stops High Voltage Surges (>100V) • Replaces Bulky TVS, LC Filter, Fuses • Adjustable Output Clamp Voltage • Overcurrent, Reverse Battery Protection • Adjustable Ride-Through Fault Timer • Undervoltage, Overvoltage Monitoring • Latchoff, Auto-Retry Options • Automotive Surge Protection • Engine Control Unit Overvoltage Protector Regulates Output at 27V During Transient Ideal Diode Controllers • Replaces Power Schottky Diode • Supply ORing or Holdup • Saves Power, Voltage, Board...

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LINEAR AUTOMOTIVE SOLUTIONS 3 60V, High Efficiency Monolithic Step-Down DC/DC Converters LT®3990: 62V Step-Down DC/DC Converter with Ultralow Quiescent Current • Low Ripple (< 5mVp_P) Burst Mode® Operation: 2.5uA • Wide Input Voltage Range: 4.2V to 62V Operating • Adjustable Switching Frequency: 200kHz to 2.2MHz • Integrated Boost and Catch Diodes Actual Size Supply Current Load Cump 60V, Ultralow Quiescent Current Synchronous Monolithic Step-Down DC/DC Converters Device Architecture 60V, Ultralow Quiescent Current Monolithic Step-Down DC/DC Converters Device Architecture 60V, Low Quiescent...

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4 LINEAR AUTOMOTIVE SOLUTIONS 60V/100V Input DC/DC Controllers LTC®3864: 60V Synchronous Step-Down Controller with Low IQ and 100% Duty Cycle Operation • Wide Operating V!N Range: 3.5V to 60V • Wide VOUT Range: 0.8V to V!N • Very Low Dropout Operation: 100% Duty Cycle • Strong High Voltage MOSFET Gate Driver • Constant Frequency Current Mode Architecture • Verified FMEA for Adjacent Pin Open/Short 60V Input, Low Quiescent Current DC/DC Controllers Device Architecture 60V/100V Input DC/DC Controllers Device Architecture

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LINEAR AUTOMOTIVE SOLUTIONS 5 40V, Low Quiescent Current Monolithic Switching Regulators Converter with Ultralow IQ • Wide Input Voltage Range: 3.4V to 42V • Ultralow Burst Mode® Operation: 2.5uA lQ • Burst Mode Output Ripple < 10mVP_p • High Efficiency Synchronous Operation: • Low Dropout Under All Conditions: 200mV at 1A • Fast Minimum Switch-On Time: 50ns Automotive Input to 5V, 2.5A Synchronous Step-Down Converter SYNC BIAS Load Dump and 3.5VMIN Cold Crank 42V, Ultralow Quiescent Current (<4uA) Synchronous Monolithic Switching Regulators Device Architecture Synchronous Step-Down...

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6 LINEAR AUTOMOTIVE SOLUTIONS 40V, Low Quiescent Current Monolithic Switching Regulators (continued) 40V, Low Quiescent Current (<100uA) Monolithic Switching Regulators Device Architecture 40V Monolithic Switching Regulators Device Architecture LT3663 Step-Down with Current Limiting 7.5 to 36,60 Max 1.20 3.30 1.5MHz n/a 2.4 LT3514 Triple Step-Down + LDO Controller 3.2 to 40 +10mA 0,80 250kHz to 2.2MHz 250kHz to 2.2MHz TBD

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LINEAR AUTOMOTIVE SOLUTIONS 7 40V, Step-Down DC/DC Converters with Cable Drop Compensation for USB Applications LT8697: 42V, 2.5A Synchronous Buck Regulator with Cable Drop Compenstation for USB Applications • Accurate 5V Output: ±1.4% Over Full Operating Junction Temperature Range • Programmable Cable Drop Compensation • Programmable Output Current Limit • Output Current Monitor • Dual Input Feedback Permits Regulation on Output • Forced Continuous Mode for Fast Load Step • Ultralow Quiescent Current Burst Mode® Operation: 2MHz 5V Step-Down Converter with Cable Drop Compensation and Output...

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8 LINEAR AUTOMOTIVE SOLUTIONS 36V to 60V Multioutput Step-Down DC/DC Converters LT3504: Quad 1A, 2.2MHz Step-Down DC/DC Converter with 100% Duty Cycle Opeartion • Wide Input Range: 3.2V to 40V • 100% Duty Cycle Operation • Resistor-Programmed Constant Frequency • Short-Circuit Robust Automotive Input to VQUT = 1-8V, 2.5V, 3.3V, & 5V Shutdown Waveform VIN (Top Trace) is ramped from down to 0V The other four traces are the output voltages 36V to 60V Multioutput Step-Down DC/DC Converters Step-Down with Dual LDOs 4.3 to 40 0.40 Dual Step-Down Dual Step-Downw/POR, Watchdog Timer Dual Step-Down...

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LINEAR AUTOMOTIVE SOLUTIONS 9 36V Input Low Quiescent Current Synchronous DC/DC Controllers Controller with Burst Mode Operation • Dual Buck Plus Single Boost Synchronous Controllers • Outputs Remain in Regulation Through Cold Crank • Wide Bias Input Voltage Range: 4.5V to 38V • Buck Output Voltage Range: 0.8V < V0UT ^ 24V • Boost Output Voltage Up to 60V Input Voltage PGND SGND 36V Input Low Quiescent Current Synchronous DC/DC Controllers Synchronous Step-Down Synchronous Step-Down Dual Synchronous Step-Down Dual Synchronous Step-Down Dual Synchronous Step-Down Synchronous Step-Up...

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