Datasheet

CLKIOPHSEL
TPS40140
MASTER
20 mA
R1
SLAVE1
CLKIO
PHSEL
TPS40140
10 kW
TPS40140
SLUS660H –SEPTEMBER 2005–REVISED JUNE 2013 www.ti.com
5.27.3.2 Two ICs Operation
To increase the total current capability, or number of outputs, a single slave controller can be added as
shown in Figure 5-15
Figure 5-15. Master Controller and One Slave Controller, Four Phases
In this configuration, the master senses that there is one slave controller, and distributes the CLKIO signal.
The slave controller senses the zero-volt level on its PHSEL pin and delays the proper number of CLKIO
pulses to be 90° out-of-phase with the master.
34 APPLICATION INFORMATION Copyright © 2005–2013, Texas Instruments Incorporated
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