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TPS43351-Q1

ACTIVE

40V Dual Synchronous Buck Controller with Frequency Spread Spectrum

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Data sheet

TPS43351-Q1

ACTIVE
Data sheet Order now

Product details

Processor supplier Generic Processor name Generic Regulated outputs (#) 2 Step-down DC/DC converter 0 Step-up DC/DC converter 0 LDO 0 Vin (min) (V) 4 Vin (max) (V) 40 Vout (min) (V) 0.9 Vout (max) (V) 11 Iout (max) (A) 6 Features Enable, Overcurrent protection, Power good, Synchronous rectification, Thermal shutdown, UVLO fixed Rating Automotive Operating temperature range (°C) -40 to 125 Step-down DC/DC controller 2 Step-up DC/DC controller 0 Iq (typ) (mA) 0.03 Switching frequency (max) (kHz) 600 Shutdown current (ISD) (typ) (µA) 2.5 Switching frequency (typ) (kHz) 440 Product type Microcontrollers
Processor supplier Generic Processor name Generic Regulated outputs (#) 2 Step-down DC/DC converter 0 Step-up DC/DC converter 0 LDO 0 Vin (min) (V) 4 Vin (max) (V) 40 Vout (min) (V) 0.9 Vout (max) (V) 11 Iout (max) (A) 6 Features Enable, Overcurrent protection, Power good, Synchronous rectification, Thermal shutdown, UVLO fixed Rating Automotive Operating temperature range (°C) -40 to 125 Step-down DC/DC controller 2 Step-up DC/DC controller 0 Iq (typ) (mA) 0.03 Switching frequency (max) (kHz) 600 Shutdown current (ISD) (typ) (µA) 2.5 Switching frequency (typ) (kHz) 440 Product type Microcontrollers
HTSSOP (DAP) 38 101.25 mm² 12.5 x 8.1
  • 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
  • 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

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.

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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Technical documentation

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Type Title Date
* Data sheet TPS4335x-Q1 Low IQ, Dual Synchronous Buck Controller datasheet (Rev. E) PDF | HTML 01 Mar 2016
Design guide TPS4333x-Q1 / TPS4335x-Q1 Design Checklist 28 Oct 2013
EVM User's guide TPS4335xEVM User Guide 16 Jun 2011

Design & development

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Simulation model

Unencrypted TPS43351-Q1 PSpice Transient Model Package (Rev. A)

SLVM829A.ZIP (611 KB) - PSpice Model
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Supported products & hardware

Supported products & hardware

Products
Multi-channel ICs (PMICs)
TPS43330A-Q1 — Automotive 2V to 40V Low Iq Single Boost & Dual Synchronous Buck Controller TPS43332-Q1 — Automotive 2V to 40V Single Boost & Dual Synchronous Buck Controller with Freq. Spread Spectrum TPS43333-Q1 — Automotive 2V to 40V Low Iq Single Boost & Dual Synchronous Buck Controller TPS43335-Q1 — Automotive 2V to 40V low Iq single boost & dual synchronous buck controller TPS43336-Q1 — Automotive 2V to 40V Single Boost & Dual Synchronous Buck Controller with Freq. Spread Spectrum TPS43337-Q1 — Automotive 2V to 40V Low Iq Single Boost & Dual Fixed Output Voltage Synchronous Buck Controller TPS43350-Q1 — 40V Dual Synchronous Buck Controller TPS43351-Q1 — 40V Dual Synchronous Buck Controller with Frequency Spread Spectrum
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Reference designs

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This reference design provides a processing foundation for a cascaded imaging radar system. Cascade radar devices can support front, long-range (LRR) beam-forming applications as well as corner- and side-cascade radar and sensor fusion systems. This reference design provides qualified developers (...)
Design guide: PDF
Schematic: PDF
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HTSSOP (DAP) 38 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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