TPS43335-Q1

TPS43336-Q1

www.ti.com

SLVSAV6B – JUNE 2011 – REVISED JULY 2012

Check for Samples: TPS43335-Q1, TPS43336-Q1

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FEATURES

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Qualified for Automotive Applications

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Separate Enable Inputs (ENA, ENB)

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AEC-Q100 Test Guidance With the Following

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Frequency Spread Spectrum (TPS43332)

Results:

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Selectable Forced Continuous Mode or

–

Device Temperature Grade 1: –40°C to

Automatic Low-Power Mode at Light Loads

125°C Ambient Operating Temperature

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Sense Resistor or Inductor DCR Sensing

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Device HBM ESD Classification Level H2

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Out-of-Phase Switching Between Buck

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Device CDM ESD Classification Level C2

Channels

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Two Synchronous Buck Controllers

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Peak Gate-Drive Current 0.7 A

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One Pre-Boost Controller

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Thermally Enhanced 38-Pin HTSSOP (DAP)

PowerPAD™ Package

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Input Range up to 40 V, (Transients up to 60

V), Operation Down to 2 V When Boost is

APPLICATIONS

Enabled

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Automotive Start-Stop, Infotainment,

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Navigation Instrument Cluster Systems

35 µA (Two Bucks On)

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Industrial and Automotive Multi-Rail DC Power

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Distribution Systems and Electronic Control

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Buck Output Range 0.9 V to 11 V

Units

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Boost Output Selectable: 7 V, 10 V, or 11 V

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Programmable frequency and External

Synchronization Range 150 kHz to 600 kHz

DESCRIPTION

The TPS43335-Q1 and TPS43336-Q1 include two current-mode synchronous buck controllers and a voltage-

mode boost controller. The devices are 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

devices 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 can be enabled 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. External MOSFET

protection is provided by current foldback in the buck controllers and cycle-by-cycle current limitation in the boost

controller. The switching frequency can be programmed over 150 kHz to 600 kHz or synchronized to an external

clock in the same range. Additionally, the TPS43336-Q1 offers frequency-hopping spread-spectrum operation.

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Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

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PowerPAD is a trademark of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2011–2012, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.