TPS43337-Q1 Series
Automotive 2V to 40V Low Iq Single Boost & Dual Fixed Output Voltage Synchronous Buck Controller
Manufacturer: Texas Instruments
Catalog
Automotive 2V to 40V Low Iq Single Boost & Dual Fixed Output Voltage Synchronous Buck Controller
Key Features
• Qualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1:–40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level H2Device CDM ESD Classification Level C2Two Synchronous Buck ControllersBuckA: Fixed Output Voltage of 3.4 VBuckB: Fixed Output Voltage of 1.235 VOne Pre-Boost ControllerInput Range up to 40 V, (Transients up to 60 V),Operation Down to 2 V When Boost Is EnabledLow-Power Mode IQ:34 µA (One Buck On), 43 µA (Two Bucks On)Low Shutdown Current Ish< 4 µABoost Output Selectable: 7 V, 8.85 V, or 10 VProgrammable Frequency and External Synchronization Range:150 to 600 kHzSeparate Enable Inputs (ENA, ENB, ENC)Selectable Forced Continuous Mode or AutomaticLow-Power Mode at Light LoadsSense Resistor or Inductor DCR Sensing for Buck ControllersOut-of-Phase Switching Between Buck ChannelsPeak Gate Drive Current 1.5 AThermally Enhanced 38-Pin HTSSOP (DAP) PowerPAD PackageQualified for Automotive ApplicationsAEC-Q100 Qualified With the Following Results:Device Temperature Grade 1:–40°C to +125°C Ambient Operating TemperatureDevice HBM ESD Classification Level H2Device CDM ESD Classification Level C2Two Synchronous Buck ControllersBuckA: Fixed Output Voltage of 3.4 VBuckB: Fixed Output Voltage of 1.235 VOne Pre-Boost ControllerInput Range up to 40 V, (Transients up to 60 V),Operation Down to 2 V When Boost Is EnabledLow-Power Mode IQ:34 µA (One Buck On), 43 µA (Two Bucks On)Low Shutdown Current Ish< 4 µABoost Output Selectable: 7 V, 8.85 V, or 10 VProgrammable Frequency and External Synchronization Range:150 to 600 kHzSeparate Enable Inputs (ENA, ENB, ENC)Selectable Forced Continuous Mode or AutomaticLow-Power Mode at Light LoadsSense Resistor or Inductor DCR Sensing for Buck ControllersOut-of-Phase Switching Between Buck ChannelsPeak Gate Drive Current 1.5 AThermally Enhanced 38-Pin HTSSOP (DAP) PowerPAD Package
Description
AI
The TPS43337-Q1 includes two current-mode synchronous buck controllers and a voltage-mode boost controller. The device is ideally suited as a pre-regulator stage with low IQrequirements and for systems that must survive supply drops due to cranking events. The integrated boost controller allows the device to operate down to 2 V at the input without seeing a drop on the buck regulator output stages. At light loads, the buck controllers enable to operate automatically in low power-mode, consuming just 34 µA of quiescent current.
The buck controllers have independent soft-start capability and power-good indicators. Current foldback in the buck controllers and cycle-by-cycle current limitation in the boost controller provide external MOSFET protection. The switching frequency is programable over 150 to 600 kHz or is synchronized to an external clock in the same range
The TPS43337-Q1 includes two current-mode synchronous buck controllers and a voltage-mode boost controller. The device is ideally suited as a pre-regulator stage with low IQrequirements and for systems that must survive supply drops due to cranking events. The integrated boost controller allows the device to operate down to 2 V at the input without seeing a drop on the buck regulator output stages. At light loads, the buck controllers enable to operate automatically in low power-mode, consuming just 34 µA of quiescent current.
The buck controllers have independent soft-start capability and power-good indicators. Current foldback in the buck controllers and cycle-by-cycle current limitation in the boost controller provide external MOSFET protection. The switching frequency is programable over 150 to 600 kHz or is synchronized to an external clock in the same range
