L6718 datasheet(15/71 Pages) STMICROELECTRONICS

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L6718

Pin description and connection diagrams

TCOMP

Thermal monitor sensor gain.

Connect proper resistor divider between VCC5 and GND to define the

gain to apply to the signal sensed by TM to implement thermal

compensation for the multi-phase rail.

Short to GND to disable the single NTC thermal compensation for multi-

phase section. See Section 10 for details.

CONFIG1/

PSI1

Connect a resistor divider to GND and VCC5 to define power

management configuration. See Section 6.6 for details.

At the end of the soft-start, this pin is internally pulled up or pulled down to

indicate the power status. See Table 17 for details.

SDA /

CONFIG2

If SMBus power management is enabled through Config0 pinstrapping,

connect to data signal of SMBus communicator.

If SMBus power management is disabled through Config0 pinstrapping,

connect a resistor divider to GND and VCC5 to define power management

characteristics. See Section 6.6.5 for details.

SCL /

CONFIG3

If SMBus power management is enabled through Config0 pinstrapping,

connect to clock signal of SMBus communicator.

If SMBus power management is disabled through Config0 pinstrapping,

connect a resistor divider to GND and VCC5 to define power management

characteristics. See Section 6.6.5 for details.

VCC5

Main IC power supply.

Operative voltage is connected to 5 V filtered with 1 µF MLCC to GND.

OSC/FLT

Oscillator pin for multi-phase rail.

Allows the programming of the switching frequency FSW for multi-phase

section. The equivalent switching frequency at the load side results in

being multiplied by the number of phases active.

The pin is internally set to 1.8 V, frequency is programmed according to a

resistor connected to GND or VCC with a gain of 10 kHz/µA. Free running

is set to 200 kHz.

The pin is forced high (3.3 V) if a fault is detected on a multi-rail section.

To recover from this condition, it is necessary to cycle VCC or enable. See

Section 11 for details.

SOSC /

SFLT

Oscillator pin for single-phase.

Allows the programming of the switching frequency FSW for the single-

phase section.

The pin is internally set to 1.8 V, frequency is programmed according to

the resistor connected to GND or VCC with a gain of 10 kHz/µA. Free

running is set to 200 kHz.

The pin is forced high (3.3 V) if a fault is detected on a single-phase rail

section. To recover from this condition, it is necessary to cycle VCC or

enable. See Section 11 for details.

Table 2. Pin description (continued)

Pin#

Name

Function

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