TPS54362-Q1

• Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
  • Device Temperature Grade 1: –40°C to 125°C
    Ambient Operating Temperature
  • Device HBM ESD Classification Level 2
  • Device CDM ESD Classification Level C5
• Withstands Transients up to 60 V With an Operating
  Range of 3.6 V to 48 V
• Asynchronous Switch-Mode Regulator With External
  Components (L and C), Load Current up to 3 A (max.)
• 0.8 V ± 1.5% Voltage Reference
• 200-kHz to 2.2-MHz Switching Frequency
• High-Voltage-Tolerant Enable Input for ON/OFF State
• Soft Start on Enable Cycle
• Slew-Rate Control on Internal Power Switch
• External Clock Input for Synchronization
• Pulse-Skip Mode (PFM) During Light Output Loads
  With Quiescent Current = 65 µA Typical
  (LPM Operation)
• External Compensation for Wide-Bandwidth Error
  Amplifier
• Internal Undervoltage Lockout, UVLO
• Programmable Reset Power-On Delay
• Reset-Function Filter Time for Fast Negative
  Transients
• Programmable Overvoltage Output Monitoring
• Programmable Undervoltage Output Monitoring,
  Issuance of Reset if Output Falls Below Threshold
• Thermal Shutdown During Excessive Power Dissipation
• Switch Current-Limit Protection
• Short-Circuit and Overcurrent Protection of FET
• Junction Temperature Range: –40°C to 150°C
• 20-Pin HTSSOP PowerPAD Package
• Qualified for Automotive Applications

The TPS54362-Q1 device is a step-down switch-mode power supply with a low-power mode and a programmable voltage supervisor. Integrated input voltage-line feed-forward topology improves line transient regulation of the voltage-mode buck regulator. The regulator has a cycle-by-cycle current limit. Pulse-skip mode operation under no load reduces the supply current to 65 µA. Using the enable pin reduces the supply shutdown current to 1 µA.

An open-drain reset signal indicates when the nominal output drops below the threshold set by an external resistor-divider network. A soft-start capacitor controls the output voltage start-up ramp. The device activates an internal undervoltage shutdown when the input supply ramps down to 2.6 V.

Frequency foldback operation protects the device during an overload conditions on the output. The device also has thermal shutdown protection due to excessive power dissipation.

The B-revision has an improved leakage current parameter, and improved discharged function while in disable mode.