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 (ISD) (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

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Pin-for-pin with same functionality to the compared device.
TPS43350-Q1 ACTIVE 40V Dual Synchronous Buck Controller This product has spread spectrum frequency.

Technical documentation

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Type Title Date
* Data sheet TPS4335x-Q1 Low IQ, Dual Synchronous Buck Controller datasheet (Rev. E) Mar. 01, 2016
Design guide TPS4333x-Q1 / TPS4335x-Q1 Design Checklist Oct. 28, 2013
User guide 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 MMWCAS-DSP evaluation module (EVM) design provides a processing foundation for a cascaded imaging radar system. Cascade radar devices can support front, long-range radar (LRR), beamforming applications, as well as corner- and side-cascade radar and sensor fusion systems. This EVM design (...)

  • High-performance TDA2x device with four radar processing SIMD accelerators (one EVE per AWRx)
  • Ethernet and PCIe connectivity for control and data, respectively
  • Reference designs provided in Cascade Imaging Radar Capture Reference Design Using Jacinto™ ADAS Processor (TIDEP-01017) and Imaging Radar (...)
document-generic User guide
The Texas Instruments TPS43351EVM evaluation module (EVM) helps designers evaluate the operation and performance of the TPS43351 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

SLVM829A.ZIP (611 KB) - PSpice Model
SLVC528.ZIP (16 KB)

Reference designs

Cascade imaging radar capture reference design using Jacinto™ ADAS processor
TIDEP-01017 The cascade development kit has two main use cases:
  1. To use the MMWCAS-DSP-EVM as a capture card to fully evaluate the AWR2243 four-chip cascade performance by using the mmWave studio tool, please read the TIDEP-01012 design guide.
  2. To use the MMWCAS-DSP-EVM to develop radar real time SW application (...)
document-generic Schematic
Low Iq Dual Synchonous Buck Converter (10.3V@10A)
PMP7856 — This is a synchronous buck converter with low Iq current. It has an input voltage range of 19V-to-32Vin and two regulated outputs: 10.3Vout @ 15A and 10.3Vout @ 10A.

CAD/CAE symbols

Package Pins Download
HTSSOP (DAP) 38 View options

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