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TPS40322 Datasheet(PDF) 23 Page - Texas Instruments

Part No. TPS40322
Description  Dual Output or Two-Phase Synchronous Buck Controller
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

TPS40322 Datasheet(HTML) 23 Page - Texas Instruments

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TPS40322
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SLUSAF8E – JULY 2011 – REVISED JANUARY 2016
7.3.13 Connection of Unused Pins
In some case, it is possible that some pins are not used. For example, if only channel 1 is used, then pins for
channel 2 need to be properly connected as well. The unused pin connections are summarized in Table 2.
Table 2. Unused Pin Connections
PIN NAME
CONNECTION
BOOTx
Floating
COMPx
Floating
CSx–
Connect to a voltage between 0 V and 5.6 V, short to CSx+
CSx+
Short to CSx-
DIFFO
Floating
EN1/SS1
Connect to ground
EN2/SS2/GSNS
Connect to ground
FBx
Connect to ground
HDRVx
Floating
ILIM1
Connect to ground through a 100-k
Ω resistor
ILIM2/VSNS
Connect to ground through a 100-k
Ω resistor
LDRVx
Floating
PGx
Connect to ground
PHSET
Connect to ground
SWx
Connect to ground
SYNCx
Floating
7.4 Device Functional Modes
At dual-output configuration, EN1/SS1 and EN2/SS2/GSNS pins are used to enable or disable switching of
channel 1 and channel 2, respectively. Floating the pin turns the channel on, pulling the pin low turns the channel
off. At two-phase configuration, EN1/SS1 pin is used to enable and disable switching of both channels.
Copyright © 2011–2016, Texas Instruments Incorporated
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