TPS43335-Q1_15 Datasheet, PDF (1/43 Pages) Texas Instruments – Single-Boost, Dual Synchronous-Buck Controller

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TPS43335-Q1, TPS43336-Q1
SLVSAV6E – JUNE 2011 – REVISED DECEMBER 2015
TPS4333x-Q1 Low-I_Q, Single-Boost, Dual Synchronous-Buck Controller
1 Features
2 Applications
•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 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 I_Q: 30 µA (One Buck On), 35 µA
(Two Bucks On)
• Low Shutdown Current I_sh < 4 µA
• Buck Output Range 0.9 V to 11 V
• Boost Output Selectable: 7 V, 10 V, or 11 V
• Programmable Frequency and External
Synchronization Range 150 kHz to 600 kHz
• Separate Enable Inputs (ENA, ENB)
• Frequency Spread Spectrum (TPS43336-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 0.7 A
• Thermally Enhanced 38-Pin HTSSOP (DAP)
PowerPAD™ Package
• Automotive Start-Stop, Infotainment, Navigation
Instrument Cluster Systems
• Industrial and Automotive Multi-Rail DC Power
Distribution Systems and Electronic Control Units
3 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, one can
enable the buck controllers 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. One can program the
switching frequency over 150 kHz to 600 kHz or
synchronize it to an external clock in the same range.
Additionally, the TPS43336-Q1 offers frequency-
hopping spread-spectrum operation.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS43335-Q1
TPS43336-Q1
HTSSOP (38)
6.20 mm × 12.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
V_BAT
VBuckA
TPS43335-Q1
or
TPS43336-Q1
VBuckB
2V
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.