TPS43330-Q1 Datasheet, PDF (1/35 Pages) Texas Instruments – LOW IQ, SINGLE BOOST, DUAL SYNCHRONOUS BUCK CONTROLLER

TPS43330-Q1
TPS43332-Q1
www.ti.com
SLVSA82A – MARCH 2011 – REVISED NOVEMBER 2011
LOW I_Q, SINGLE BOOST, DUAL SYNCHRONOUS BUCK
CONTROLLER
Check for Samples: TPS43330-Q1, TPS43332-Q1
FEATURES
1
• Two Synchronous Buck Controllers
• One Pre-Boost Controller
• Input Range up to 40V, (Transients up to 60V),
Operation Down to 2V when Boost is Enabled
• Low Power Mode I_Q: 30µA (one Buck on), 35µA
(Two Bucks on)
• Low Shutdown Current I_sh < 4 µA
• Buck Output Range 0.9V to 11V
• Boost Output Selectable: 7V/10V/11V
• Programmable frequency and External
Synchronization Range 150kHz to 600kHz
• 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 Package – 38-Pin
HTSSOP (DAP) with PowerPad^TM
• Qualified for Automotive Applications
APPLICATIONS
• Automotive Start-Stop, Infotainment,
Navigation Instrument Cluster Systems
• Industrial/Automotive Multi-Rail DC Power
Distribution Systems & Electronic Control
Units
DESCRIPTION
The TPS43330-Q1/TPS43332-Q1 includes two current mode synchronous buck controllers and a voltage mode
boost controller. The part is ideally suited as pre-regulator stage with low Iq requirements and systems that need
to survive supply drops due to cranking events. The integrated boost controller allows the device to operate down
to 2V 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 30µA of quiescent current.
The buck controllers have independent soft start capability and power good indicators. External MOSFET
protection is provided by current fold back 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 TPS43332-Q offers frequency-hopping spread spectrum
operation.
VBAT
VBuckA
TPS43330/2
VBuckB
2V
Figure 1. Typical Application Diagram
1
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.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Copyright © 2011, Texas Instruments Incorporated