TPS43330-Q1_14 Datasheet, PDF (1/48 Pages) Texas Instruments – Low IQ, Single Boost, Dual Synchronous Buck Controller

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TPS43330-Q1, TPS43332-Q1
SLVSA82F – MARCH 2011 – REVISED DECEMBER 2014
TPS4333x-Q1 Low I_Q, Single Boost, Dual Synchronous Buck Controller
1 Features
2 Applications
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature
– Device HBM ESD Classification Level 2
– Device CDM ESD Classification Level C4B
• 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 (TPS43332)
• 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
• Automotive Start-Stop, Infotainment, Navigation
Instrument Cluster Systems
• Industrial and Automotive Multi-Rail DC Power
Distribution Systems and Electronic Control Units
3 Description
The TPS43330-Q1 and TPS43332-Q1 devices
(TPS4333x-Q1) include two current-mode
synchronous buck controllers and a voltage-mode
boost controller. The TPS4333x-Q1 family of devices
is ideally suited as a pre-regulator stage with low I_Q
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. Current
foldback in the buck controllers and cycle-by-cycle
current limitation in the boost controller provide
external MOSFET protection. The switching
frequency can be programed over 150 kHz to 600
kHz or synchronized to an external clock in the same
range. Additionally, the TPS43332-Q1 device offers
frequency-hopping spread-spectrum operation.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS43330-Q1
TPS43332-Q1
HTSSOP (38) 12.50 mm × 6.20 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
4 Typical Application Diagram
VBAT
VBuckA
TPS43330-Q1
or
TPS43332-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.