TPS54162 Series
Automotive 3.6V to 48V, 1A Buck Converter with Low Iq and Voltage Supervision
Manufacturer: Texas Instruments
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Key Features
• Asynchronous Switch Mode Regulator3.6 V to 48 V Operating Range, Withstands Transients up to 60 V1 A Maximum Load Current50 µA Typical Quiescent Current200 kHz to 2.2 MHz Switching Frequency0.8 V ± 1.5% Voltage ReferenceHigh Voltage Tolerant Enable InputSoft Start on Enable CycleSlew Rate Control on Internal Power SwitchLow-Power Mode for Light Load ConditionsProgrammable Delay for Power-On ResetExternal Compensation for Error AmplifierReset Function Filter Time for Fast Negative TransientsProgrammable Overvoltage, Undervoltage Output MonitorThermal Sensing and ShutdownSwitch Current Limit ProtectionShort Circuit and Overcurrent Protection of FETJunction Temperature Range: –40°C to 150°C20-Pin HTSSOP PowerPAD™ PackageAPPLICATIONSQualified for Automotive ApplicationsAutomotive TelematicsNavigation SystemsIn-Dash InstrumentationBattery Powered ApplicationsAsynchronous Switch Mode Regulator3.6 V to 48 V Operating Range, Withstands Transients up to 60 V1 A Maximum Load Current50 µA Typical Quiescent Current200 kHz to 2.2 MHz Switching Frequency0.8 V ± 1.5% Voltage ReferenceHigh Voltage Tolerant Enable InputSoft Start on Enable CycleSlew Rate Control on Internal Power SwitchLow-Power Mode for Light Load ConditionsProgrammable Delay for Power-On ResetExternal Compensation for Error AmplifierReset Function Filter Time for Fast Negative TransientsProgrammable Overvoltage, Undervoltage Output MonitorThermal Sensing and ShutdownSwitch Current Limit ProtectionShort Circuit and Overcurrent Protection of FETJunction Temperature Range: –40°C to 150°C20-Pin HTSSOP PowerPAD™ PackageAPPLICATIONSQualified for Automotive ApplicationsAutomotive TelematicsNavigation SystemsIn-Dash InstrumentationBattery Powered Applications
Description
AI
The TPS54162 is a step-down switch-mode power supply with a voltage supervisor and an integrated NMOS switching FET. 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. The device also features low-power mode operation under light load conditons which reduces the supply current to 50 µA (typical). By pulling the EN pin low, the supply shutdown current is reduced to 1 µA (typical).
An open drain reset signal indicates when the nominal output drops below the reset threshold set by an external resistor divider network. The output voltage start up ramp is controlled by a soft start capacitor. There is an internal undervoltage shut down which is activated when the input supply ramps down to 2.6 V. The device is protected during an overload condition on output by frequency fold back operation, and also has a thermal shutdown protection.
The TPS54162 is a step-down switch-mode power supply with a voltage supervisor and an integrated NMOS switching FET. 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. The device also features low-power mode operation under light load conditons which reduces the supply current to 50 µA (typical). By pulling the EN pin low, the supply shutdown current is reduced to 1 µA (typical).
An open drain reset signal indicates when the nominal output drops below the reset threshold set by an external resistor divider network. The output voltage start up ramp is controlled by a soft start capacitor. There is an internal undervoltage shut down which is activated when the input supply ramps down to 2.6 V. The device is protected during an overload condition on output by frequency fold back operation, and also has a thermal shutdown protection.