Datasheet

TPS40140

SLUS660H –SEPTEMBER 2005–REVISED JUNE 2013

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5.27 CONFIGURING SINGLE AND MULTIPLE ICS

The controller may be configured for a single output, 2-phase mode or a dual output voltage mode. In the

dual output mode the input voltages and the output voltages are independent of each other. In 2-phase

mode the input voltages and output voltages are tied together, respectively and certain other pins must be

configured. The two phases of a single controller are always 180° out-of-phase. The entry inTable 5-3 that

refer to "TO NETWORK" means the normal resistor-capacitor network used for control loop compensation.

The other entries refer to components that are typically connected to the device pin.

Table 5-2. Configuring Clock Mode

TIMING RESISTANCE VOLTAGE (V) CLOCK MODE

< 0.7 V (resistor to GND) Master (or single device)

> 1 V (tied to VREG or VDD) Slave

5.27.1 Single Device Operation

A single controller may be configured as a 2-phase or dual output. A summary of the modes and device

pin connections for a single controller is given in Table 5-3. The basic schematic of a single controller

operating in a 2-phase mode is shown in Figure 5-11 . The dual output schematic is shown in Figure 5-14.

Table 5-3. TPS40140 Single Device Mode Selection and Pin Configuration

DEVICE PIN FOR 2 PHASE MODE FOR DUAL OUTPUT MODE

COMP1 TO NETWORK TO NETWORK

COMP2 COMP1 TO NETWORK

TRK1 TO SS CAPACITOR TO SS CAPACITOR

TRK2 TO BP5 TO SS CAPACITOR

ILIM1 TO SET RESISTORS TO SET RESISTORS

ILIM2 GND TO SET RESISTORS

FB1 TO NETWORK TO NETWORK

FB2 GND TO NETWORK

PHSEL GND GND

PGOOD1 TO PULL-UP RESISTOR TO PULL-UP RESISTOR

CLKIO OPEN OPEN

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