TPS54320 Series
4.5V to 17V Input, 3A Synchronous Step-Down SWIFT™ Converter
Manufacturer: Texas Instruments
Catalog
4.5V to 17V Input, 3A Synchronous Step-Down SWIFT™ Converter
Key Features
• Integrated 57-mΩ / 50-mΩ MOSFETsSplit Power Rail: 1.6 to 17 V on PVIN200-kHz to 1.2-MHz Switching FrequencySynchronizes to External Clock0.8-V Voltage Reference With ±1% AccuracyLow 2-µA Shutdown Quiescent CurrentHiccup Overcurrent ProtectionMonotonic Start-Up into Prebiased Outputs–40°C to 150°C Operating Junction Temperature RangePin-to-Pin Compatible With the TPS54620Adjustable Slow Start/Power SequencingPower Good Output for Undervoltage and Overvoltage MonitoringAdjustable Input Undervoltage Lockout (UVLO)Supported by SwitcherPro™ Software ToolFor SWIFT™ Documentation and SwitcherPro, Visitwww.ti.com/swiftCreate a Custom Design Using the TPS54320 With theWEBENCH®Power DesignerIntegrated 57-mΩ / 50-mΩ MOSFETsSplit Power Rail: 1.6 to 17 V on PVIN200-kHz to 1.2-MHz Switching FrequencySynchronizes to External Clock0.8-V Voltage Reference With ±1% AccuracyLow 2-µA Shutdown Quiescent CurrentHiccup Overcurrent ProtectionMonotonic Start-Up into Prebiased Outputs–40°C to 150°C Operating Junction Temperature RangePin-to-Pin Compatible With the TPS54620Adjustable Slow Start/Power SequencingPower Good Output for Undervoltage and Overvoltage MonitoringAdjustable Input Undervoltage Lockout (UVLO)Supported by SwitcherPro™ Software ToolFor SWIFT™ Documentation and SwitcherPro, Visitwww.ti.com/swiftCreate a Custom Design Using the TPS54320 With theWEBENCH®Power Designer
Description
AI
The TPS54320 is a full-featured 17-V, 3-A synchronous step-down converter which is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing footprint of the inductor.
The output voltage start-up ramp is controlled by the SS/TR pin which allows operation as either a stand-alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.
Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection is triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54320 is available in a 14-pin, 3.5-mm × 3.5-mm VQFN, thermally enhanced package.
The TPS54320 is a full-featured 17-V, 3-A synchronous step-down converter which is optimized for small designs through high efficiency and integrated high-side and low-side MOSFETs. Further space savings are achieved through current mode control, which reduces component count, and by selecting a high switching frequency, reducing footprint of the inductor.
The output voltage start-up ramp is controlled by the SS/TR pin which allows operation as either a stand-alone power supply or in tracking situations. Power sequencing is also possible by correctly configuring the enable and the open drain power good pins.
Cycle by cycle current limiting on the high-side FET protects the device in overload situations and is enhanced by a low-side sourcing current limit which prevents current runaway. Hiccup protection is triggered if the overcurrent condition has persisted for longer than the preset time. Thermal shutdown disables the part when die temperature exceeds thermal shutdown temperature. The TPS54320 is available in a 14-pin, 3.5-mm × 3.5-mm VQFN, thermally enhanced package.
