L6758A datasheet(8/42 Pages) STMICROELECTRONICS

8 / 42 page

Pin description and connection diagrams

L6758A

8/42

DocID023298 Rev 2

SCOMP /

TMAX

Error amplifier output.

Connect with an (R

- C

)// C

to SFB. The device cannot be disabled

by pulling low this pin. Connect proper resistor R

TMAX

to GND to define

TMAX register.

SREF

The reference used for the regulation of the single-phase section is

available on this pin with -100 mV offset. Connect through an R

SREF

to SRGND to optimize DVID transitions. Connect through an R

SOS

resistor to the SFB pin to implement small positive offset to the regulation.

VCC5

Main IC power supply.

Operative voltage is 5 V ±5%. Filter with 1

μF MLCC to GND (typ.).

SOSC

Oscillator pin.

It allows the programming of the switching frequency F

SSW

for the single-

phase section. The pin is internally set to 1.0 V, frequency for single-phase

is programmed according to the resistor connected to GND or VCC with a

gain of 10 kHz/μA. Leaving the pin floating programs a switching

frequency of 200 kHz. See

Section 10 for details.

IMAX /

SIMAX

Connect a resistor divider to GND/VCC5 in order to define the IMAX

Table 8,

Table 10 and Section 6 for details.

BOOT /

ADDR

Connect a resistor divider to GND/VCC5 in order to define BOOT register

and SVI address. See

Table 8 and Section 6 for details.

STM

Thermal monitor sensor.

Connect with proper network embedding NTC to the single-phase power

section. The IC senses the power section temperature and uses the

information to define the VR_HOT signal and temperature zone register.

By programming proper STCOMP gain, the IC also implements load-line

thermal compensation for the single-phase section. Short to GND if not

used. See

Section 8 for details.

STCOMP

Thermal monitor sensor gain.

Connect proper resistor divider between VCC5 and GND to define the

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

compensation for the single-phase section. Short to GND to disable

thermal compensation for single-phase. See

Section 8 for details.

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 section. Short to GND to disable

thermal compensation for multi-phase. See

Section 8 for details.

Thermal monitor sensor.

Connect with proper network embedding NTC to the multi-phase power

section. The IC senses the power section temperature and uses the

information to define the VR_HOT signal and temperature zone register.

By programming proper TCOMP gain, the IC also implements load-line

thermal compensation for the multi-phase section. Short to GND if not

used. See

Section 8 for details.

Table 2. Pin description (continued)

Pin#

Name

Function

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