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L6759D Fiches technique(PDF) 11 Page - STMicroelectronics

No de pièce L6759D
Description  Fully configurable through PMBus
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L6759D Fiches technique(HTML) 11 Page - STMicroelectronics

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L6759D
Pin description and connection diagrams
Doc ID 023240 Rev 1
11/51
19
ILIM
Multi-phase section current limit.
A current proportional to the multi-phase load current is sourced from
this pin. Connect through a resistor RLIM to GND. When the pin voltage
reaches 2.5 V, the overcurrent protection is set and the IC latches. Filter
through CLIM to GND to delay OC intervention.
20
SRGND
Remote buffer ground sense.
Connect to the negative side of the single-phase load to perform remote
sense.
21
SFBR
Remote buffer positive sense.
Connect to the positive side of the single-phase load to perform remote
sense.
22
SVSEN
Remote buffer output.
Output voltage monitor, manages OV and UV protection.
Connect with a resistor RSFB // (RSI - CSI) to SFB.
23
SFB
Error amplifier inverting input.
Connect with a resistor RSFB // (RSI - CSI) to SVSEN and with an
(RSF - CSF)// CSH to SCOMP.
24
SCOMP
Error amplifier output.
Connect with an (RSF - CSF)// CSH to SFB. The device cannot be dis-
abled by pulling low this pin.
25
IMAX
Connect a resistor divider to GND/VCC5 in order to define the IMAX
register. JMode and BOOT voltage can be controlled through this pin.
See Table 6 and Section 6 for details.
26
SMDATA
PMBus data.
27
SMAL#
PMBus alert.
28
SMCLOCK
PMBus clock.
29
ADDR
Connect a resistor divider to GND/VCC5 in order to define the IC
address, to define the GDC and DPM thresholds and to control the
droop function on multi-phase. See Table 6 and Section 6 for details.
30
OSC
Oscillator pin.
It allows the programming of the switching frequency FSW for the multi-
phase section. The pin is internally set to 1.02 V, the frequency for multi-
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 per phase. The effective frequency
observable on the load results being multiplied by the number of active
phases N. See Section 10 for details.
31
VIN
Input voltage monitor.
Connect to input voltage monitor point through a divider RUP / RDOWN to
perform VIN sense through PMBus (RUP. = 118.5 kΩ; RDOWN = 10 kΩ
typ.). See Section 12.3 for details.
Table 2.
Pin description (continued)
Pin#
Name
Function


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