TPS43330A-Q1 Datasheet, PDF (1/48 Pages) Texas Instruments – Low IQ, Single-Boost Dual Synchronous Buck Controller

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TPS43330A-Q1
SLVSC16B – AUGUST 2013 – REVISED JULY 2016
TPS43330A-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 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 to 11 V
• Boost Output Selectable: 7 V, 8.85 V, or 10 V
• Programmable Frequency and External
Synchronization Range 150 to 600 kHz
• Separate Enable Inputs (ENA, ENB, ENC)
• Selectable Forced Continuous Mode or Automatic
Low-Power Mode at Light Loads
• Sense Resistor or Inductor DCR Sensing for Buck
Controllers
• 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 TPS43330A-Q1 device includes two current-
mode synchronous-buck controllers and a voltage-
mode boost controller. The device 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 device 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 enable 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 is programable over 150 to 600 kHz or is
synchronized to an external clock in the same range.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS43330A-Q1
HTSSOP (38)
12.50 mm × 6.20 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Typical Application Diagram
V_VBAT
TPS43330A-Q1
VBuckA
VBuckB
2V
Copyright © 2016, Texas Instruments Incorporated
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.