TPS43335 Series
Automotive 2V to 40V low Iq single boost & dual synchronous buck controller
Manufacturer: Texas Instruments
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Key Features
• Qualified for Automotive ApplicationsAEC-Q100 Test Guidance With the FollowingResults:Device Temperature Grade 1: –40°C to 125°CAmbient Operating TemperatureDevice HBM ESD Classification Level H2Device CDM ESD Classification Level C2Two Synchronous Buck ControllersOne 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: 30 µA (One Buck On), 35 µA(Two Bucks On)Low Shutdown Current Ish< 4 µABuck Output Range 0.9 V to 11 VBoost Output Selectable: 7 V, 10 V, or 11 VProgrammable Frequency and ExternalSynchronization Range 150 kHz to 600 kHzSeparate Enable Inputs (ENA, ENB)Frequency Spread Spectrum (TPS43336-Q1)Selectable Forced Continuous Mode or AutomaticLow-Power Mode at Light LoadsSense Resistor or Inductor DCR SensingOut-of-Phase Switching Between Buck ChannelsPeak Gate-Drive Current 0.7 AThermally Enhanced 38-Pin HTSSOP (DAP)PowerPAD™ PackageQualified for Automotive ApplicationsAEC-Q100 Test Guidance With the FollowingResults:Device Temperature Grade 1: –40°C to 125°CAmbient Operating TemperatureDevice HBM ESD Classification Level H2Device CDM ESD Classification Level C2Two Synchronous Buck ControllersOne 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: 30 µA (One Buck On), 35 µA(Two Bucks On)Low Shutdown Current Ish< 4 µABuck Output Range 0.9 V to 11 VBoost Output Selectable: 7 V, 10 V, or 11 VProgrammable Frequency and ExternalSynchronization Range 150 kHz to 600 kHzSeparate Enable Inputs (ENA, ENB)Frequency Spread Spectrum (TPS43336-Q1)Selectable Forced Continuous Mode or AutomaticLow-Power Mode at Light LoadsSense Resistor or Inductor DCR SensingOut-of-Phase Switching Between Buck ChannelsPeak Gate-Drive Current 0.7 AThermally Enhanced 38-Pin HTSSOP (DAP)PowerPAD™ Package
Description
AI
The TPS43335-Q1 and TPS43336-Q1 include two current-mode synchronous buck controllers and a voltage-mode boost controller. The devices are ideally suited as a pre-regulator stage with low Iq requirements and for applications that must survive supply drops due to cranking events. The integrated boost controller allows the devices to operate down to 2 V at the input without seeing a drop on the buck regulator output stages. At light loads, one can enable the buck controllers to operate automatically in low-power mode, consuming just 30 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. One can program the switching frequency over 150 kHz to 600 kHz or synchronize it to an external clock in the same range. Additionally, the TPS43336-Q1 offers frequency-hopping spread-spectrum operation.
The TPS43335-Q1 and TPS43336-Q1 include two current-mode synchronous buck controllers and a voltage-mode boost controller. The devices are ideally suited as a pre-regulator stage with low Iq requirements and for applications that must survive supply drops due to cranking events. The integrated boost controller allows the devices to operate down to 2 V at the input without seeing a drop on the buck regulator output stages. At light loads, one can enable the buck controllers to operate automatically in low-power mode, consuming just 30 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. One can program the switching frequency over 150 kHz to 600 kHz or synchronize it to an external clock in the same range. Additionally, the TPS43336-Q1 offers frequency-hopping spread-spectrum operation.