Product details


Regulated outputs (#) 2 Vin (Min) (V) 4 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 0 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) 2.5 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 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 HBM CDM Classification Level C2
  • Two Synchronous Buck Controllers
  • Input Range up to 40 V (Transients up to 60 V)
  • 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
  • Programmable Frequency and External Synchronization Range 150 kHz to 600 kHz
  • Separate Enable Inputs (ENA, ENB)
  • Frequency Spread Spectrum (TPS43351-Q1)
  • 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
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The TPS43350-Q1 and TPS43351-Q1 include two current-mode synchronous buck controllers designed for the harsh environment in automotive applications. The devices are ideal for use in a multi-rail system with low quiescent requirements, as they automatically operate in low-power mode (consuming typically 30 µA) at light loads. The devices offer protection features such as thermal, soft-start, and overcurrent protection. During short-circuit conditions of the regulator output, activation of the current-foldback feature can limit the current through the MOSFETs for control of power dissipation. The two independent soft-start inputs allow ramp-up of the output voltage independently during start-up.

The programmable range of the switching frequency is from 150 kHz to 600 kHz, as is the frequency of an external clock to which the devices can synchronize. Additionally, the TPS43351-Q1 offers frequency-hopping spread-spectrum operation.

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Integrated pre-boost versions available

TPS43330-Q1 | TPS43330A-Q1 | TPS43332-Q1 | TPS43333-Q1 | TPS43335-Q1 | TPS43336-Q1 | TPS43337-Q1

Technical documentation

= Top documentation for this product selected by TI
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet TPS4335x-Q1 Low IQ, Dual Synchronous Buck Controller datasheet (Rev. E) Mar. 01, 2016
User guides TPS4333x-Q1 / TPS4335x-Q1 Design Checklist Oct. 28, 2013
Technical articles Don’t underestimate the power of an LDO Oct. 19, 2013
Technical articles How to optimize your DSP power budget Oct. 03, 2013
Technical articles "X" Marks the spot - 7 Treasures in a pirate engineer's treasure chest Sep. 19, 2013
Technical articles Power Tips: How to be discrete Sep. 17, 2013
User guides TPS4335xEVM User Guide Jun. 16, 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 Texas Instruments TPS43350EVM evaluation module (EVM) helps designers evaluate the operation and performance of the TPS43350 Low Iq, Dual Synchronous Buck Controller.

  • Two Synchronous Buck Controllers
  • Input Range up to 40V, (transients up to 60V)
  • Low Power Mode Iq: 30uA (one Buck on), 35uA (two Bucks on)
  • Low Shutdown Current Ish < 4uA
  • Programmable frequency and External Synchronization Range: 150kHz to 600kHz
  • Separate Enable Inputs (ENA, ENB)
  • Selectable Forced (...)

Design tools & simulation

SLVM828.ZIP (651 KB) - PSpice Model
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)
SLVC528.ZIP (16 KB)

CAD/CAE symbols

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HTSSOP (DAP) 38 View options

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