●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 IQ requirements 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
● 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 H2
● Device CDM ESD Classification Level C2
● Two Synchronous Buck Controllers
● BuckA: Fixed Output Voltage of 3.4 V
● BuckB: Fixed Output Voltage of 1.235 V
● One Pre-Boost Controller
● Input Range up to 40 V, (Transients up to 60 V),
●Operation Down to 2 V When Boost Is Enabled
● Low-Power Mode IQ:
●34 µA (One Buck On), 43 µA (Two Bucks On)
● Low Shutdown Current Ish < 4 µA
● Boost Output Selectable: 7 V, 8.85 V, or 10 V
● Programmable Frequency and External Synchronization Range:
●150 to 600 kHz
● Separate Enable Inputs (ENA, ENB, ENC)
● Selectable Forced Continuous Mode or Automatic
●Low-Power Mode at Light Loads
● Sense Resistor or Inductor DCR Sensing for Buck Controllers
● Out-of-Phase Switching Between Buck Channels
● Peak Gate Drive Current 1.5 A
● Thermally Enhanced 38-Pin HTSSOP (DAP) PowerPAD Package
