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TPS43337-Q1 www.

ti.com SLVSBC2A CAUGUST 2013CREVISED SEPTEMBER

2013 LOW IQ, SINGLE-BOOST, FIXED-VOLTAGE DUAL SYNCHRONOUS BUCK CONTROLLER Check for Samples: TPS43337-Q1 1FEATURES ? Peak Gate Drive Current 1.5 A ? Thermally Enhanced 38-Pin HTSSOP (DAP) 2? Qualified for Automotive Applications PowerPAD? Package ? AEC-Q100 Qualified With the Following Results: APPLICATIONS C Device Temperature Grade 1: C40°C to ? Automotive Start-Stop, Infotainment, +125°C Ambient Operating Temperature Navigation Instrument Cluster Systems C Device HBM ESD Classification Level H2 ? Industrial and Automotive Multi-Rail DC C Device CDM ESD Classification Level C2 Power-Distribution Systems and Electronic ? Two Synchronous Buck Controllers Control Units ? BuckA: Fixed Output Voltage of 3.4 V ? BuckB: Fixed Output Voltage of 1.235 V DESCRIPTION The TPS43337-Q1 includes two current-mode ? One Pre-Boost Controller synchronous buck controllers and a voltage-mode ? Input Range up to

40 V, (Transients up to

60 boost controller. The device is ideally suited as a pre- V), Operation Down to

2 V When Boost Is regulator stage with low IQ requirements and for Enabled systems that must survive supply drops due to ? Low-Power Mode IQ:

34 ?A (One Buck On),

43 cranking events. The integrated boost controller ?A (Two Bucks On) allows the device to operate down to

2 V at the input without seeing a drop on the buck regulator output ? Low Shutdown Current Ish <

4 ?A stages. At light loads, the buck controllers enable to ? Boost Output Selectable:

7 V, 8.85 V, or

10 V operate automatically in low power-mode, consuming ? Programmable Frequency and External just

34 ?A of quiescent current. Synchronization Range:

150 to

600 kHz The buck controllers have independent soft-start ? Separate Enable Inputs (ENA, ENB, ENC) capability and power-good indicators. Current foldback in the buck controllers and cycle-by-cycle ? Selectable Forced Continuous Mode or current limitation in the boost controller provide Automatic Low-Power Mode at Light Loads external MOSFET protection. The switching ? Sense Resistor or Inductor DCR Sensing for frequency is programable over

150 to

600 kHz or is Buck Controllers synchronized to an external clock in the same range ? Out-of-Phase Switching Between Buck Channels 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. 2PowerPAD is a trademark of Texas Instruments. PRODUCTION DATA information is current as of publication date. Copyright ? 2013, 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. TPS43337-Q1 SLVSBC2A CAUGUST 2013CREVISED SEPTEMBER

2013 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. space ABSOLUTE MAXIMUM RATINGS(1) MIN MAX UNIT Voltage Input voltage: VIN, VBAT C0.3

60 V Enable inputs: ENA, ENB C0.3

60 V Bootstrap inputs: CBA, CBB C0.3

68 V Phase inputs: PHA, PHB C0.7

60 V Phase inputs: PHA, PHB (for

150 ns) C1 V Feedback inputs: FBA, FBB C0.3

13 V Error amplifier outputs: COMPA, COMPB C0.3

13 V Voltage High-side MOSFET driver: GA1CPHA, GB1CPHB C0.3 8.8 V (buck function: Low-side MOSFET drivers: GA2, GB2 C0.3 8.8 V BuckA and BuckB) Current-sense voltage: SA1, SA2, SB1, SB2 C0.3