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



Product details


Regulated outputs (#) 3 Vin (Min) (V) 2 Vin (Max) (V) 40 Iout (Max) (A) 6 Step-down DC/DC controller 2 Step-down DC/DC converter 0 Step-up DC/DC controller 1 Step-up DC/DC converter 0 LDO 0 Iq (Typ) (mA) 0.03 Features Enable, Over Current Protection, Power Good, Synchronous Rectification, Thermal Shutdown, UVLO Fixed Operating temperature range (C) -40 to 125 Rating Automotive Processor name Generic Processor supplier Generic Shutdown current (Typ) (uA) 3 Configurability Factory programmable, Hardware configurable open-in-new Find other Multi-channel ICs (PMIC)

Package | Pins | Size

HTSSOP (DAP) 38 101 mm² 12.5 x 8.1 open-in-new Find other Multi-channel ICs (PMIC)


  • 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
  • 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 to 11 V
  • 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
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The TPS43330A-Q1 device 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 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, the buck controllers enable 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 programable over 150 to 600 kHz or is synchronized to an external clock in the same range.

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NEW LM5127-Q1 ACTIVE 42V wide-Vin triple buck and boost controller for automotive applications Updated improved version of TPS43330A-Q1

Technical documentation

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Type Title Date
* Datasheet TPS43330A-Q1 Low IQ, Single-Boost Dual Synchronous Buck Controller datasheet (Rev. B) Jul. 28, 2016
User guide TPS4333x-Q1 / TPS4335x-Q1 Design Checklist Oct. 28, 2013
User guide TPS4333xEVM Apr. 01, 2011

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

document-generic User guide

The Cranking simulator generates preprogrammed cranking pulses, resembling typical pulse as seen on Car-Battery during cranking (e.g. during start-stop operation). Other pulses can be configured via source-code change, which makes it applicable for any supply-voltage profile in the range of 2.18V.


  • 3 pre-programmed typical cranking pulses
  • Other pulses individually programmable via firmware-change
  • up to 50W output power
  • Adjustable repetition rate
  • Continuous or single-shot operation
document-generic User guide

The Texas Instruments TPS43330EVM evaluation module (EVM) helps designers evaluate the operation and performance of the TPS43330 Low Iq, Single Boost, Dual Synchronous Buck Controller.

  • Two Synchronous Buck Controllers
  • One Pre-Boost Controller
  • Input Range up to 40V, (transients up to 60V), Operation Down to 2V when Boost is enabled
  • Low Power Mode Iq: 30uA (one Buck on), 35uA (two Bucks on)
  • Low Shutdown Current Ish < 4uA
  • Boost Output Selectable: 7V/10V/11V
  • Programmable frequency and (...)

Design tools & simulation

SLVM935.ZIP (7 KB) - IBIS Model
SLVM938A.ZIP (679 KB) - PSpice Model
SLVC528.ZIP (16 KB)

Reference designs

Automotive Off-Battery Infotainment Processor Power Reference Design
TIDA-00801 The TIDA-00801 reference design is a full off-battery to point of load power solution supporting input voltages as low as 2V.  It uses the Boost plus Buck DC/DC regulator TPS43330A-Q1 supporting an  input voltage range of  2V to 40V and allowing the design to support not only (...)
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
HTSSOP (DAP) 38 View options

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