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Automotive 2V to 40V Low Iq Single Boost & Dual Synchronous Buck Controller


Package | PIN: DAP | 38
Temp: Q (-40 to 125)
Carrier: Cut Tape
Qty Price
1-9 $4.83
10-24 $4.34
25-99 $4.06
100-249 $3.64
250-499 $3.39
500-749 $2.95
750-999 $2.56
1000+ $2.50


  • Qualified for Automotive Applications
  • AEC-Q100 Test Guidance 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
  • 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: 30 µA (One Buck On), 35 µA
    (Two Bucks On)
  • Low-Shutdown Current Ish < 4 µA
  • Buck Output Range 0.9 V to 11 V
  • Boost Output Selectable: 7 V, 10 V, or 11 V
  • Programmable Frequency and External
    Synchronization Range: 150 kHz to 600 kHz
  • Separate Enable Inputs (ENA, ENB)
  • Selectable Forced-Continuous Mode or Automatic
    Low-Power Mode at Light Loads
  • Sense Resistor or Inductor DCR Sensing
  • Out-of-Phase Switching Between Buck Channels
  • Peak Gate-Drive Current: 1.5 A
  • Thermally Enhanced 38-Pin HTSSOP (DAP)
    PowerPAD™ Package

Texas Instruments  TPS43333QDAPRQ1

The TPS43333-Q1 includes two current-mode synchronous buck controllers and a voltage-mode boost controller. The device is ideal for use 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 device 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. The switching frequency is programmable over 150 kHz to 600 kHz or can synchronize to an external clock in the same range.