MAXIM MAX15005CAUE/V+

The MAX15004/MAX15005 high-performance, currentmode PWM controllers operate at an automotive input voltage range from 4.5V to 40V (load dump). The input voltage can go lower than 4.5V after startup if IN is boot­ strapped to a boosted output voltage. The controllers integrate all the building blocks necessary for implement­ ing fixed-frequency isolated/nonisolated power supplies. The general-purpose boost, flyback, forward, and SEPIC converters can be designed with ease around the MAX15004/MAX15005. The current-mode control architecture offers excellent linetransient response and cycle-by-cycle current limit while simplifying the frequency compensation. Programmable slope compensation simplifies the design further. A fast 60ns current-limit response time, low 300mV current-limit threshold makes the controllers suitable for high-efficiency, high-frequency DC-DC converters. The devices include an internal error amplifier and 1% accurate reference to facilitate the primary-side regulated, single-ended flyback converter or nonisolated converters. An external resistor and capacitor network programs the switching frequency from 15kHz to 500kHz (1MHz for the MAX15005). The MAX15004A/MAX15005 provide a SYNC input for synchronization to an external clock. The maximum FET-driver duty cycle for the MAX15004A/B/C/D is 50%. The maximum duty cycle can be set on the MAX15005A/B/C/D by selecting the right combination of RT and CT. The input undervoltage lockout (ON/OFF) programs the input-supply startup voltage and can be used to shutdown the converter to reduce the total shutdown current down to 10μA. Protection features include cycle-by-cycle and hiccup current limit, output overvoltage protection, and thermal shutdown. The MAX15004/MAX15005 are available in space-saving 16-pin TSSOP and thermally enhanced 16-pin TSSOP-EP packages. All devices operate over the -40°C to +125°C automotive temperature range.

• Wide Supply Voltage Range Meets Automotive Power-Supply Operating Requirement Including “Cold Crank” Conditions
• 4.5V to 40V Operating Input Voltage Range (Can Operate at Lower Voltage After Startup if Input is Bootstrapped to a Boosted Output)
• Control Architecture Offers Excellent Performance While Simplifying the Design
• Current-Mode Control
• 300mV, 5% Accurate Current-Limit Threshold Voltage
• Programmable Slope Compensation
• 50% (MAX15004) or Adjustable (MAX15005) Maximum Duty Cycle
• Accurate, Adjustable Switching Frequency and Synchronization Avoids Interference with Sensitive Radio Bands
• Switching Frequency Adjustable from 15kHz to 500kHz (1MHz for the MAX15005A/B/C/D) RC Programmable 4% Accurate Switching Frequency
• External Frequency Synchronization
• Built-In Protection Capability for Improved System Reliability
• Cycle-by-Cycle and Hiccup Current-Limit Protection
• Overvoltage and Thermal-Shutdown Protection
• -40°C to +125°C Automotive Temperature Range
• AEC-Q100 Qualified

• Automotive
• Vacuum Fluorescent Display (VFD) Power Supply
• Isolated Flyback, Forward, Nonisolated SEPIC, Boost Converters