L6713A STMicroelectronics, L6713A Datasheet - Page 38

• Manufacturer Part Number: L6713A
• Description: IC CTRLR 2/3PH W/DRIVERS 64-TQFP
• Manufacturer: STMicroelectronics

Specifications of L6713A

• Applications: Controller, Intel VR10, VR11, AMD CPU
• Voltage - Input: 12V
• Number Of Outputs: 3
• Voltage - Output: 0.3 ~ 1.6 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 64-TQFP Exposed Pad, 64-eTQFP, 64-HTQFP, 64-VQFP
• Output Current: 2 A
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Load transient boost technologyTM
13.1
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LTB™ gain modification (Optional)
The internal gain can be modified through the SS/LTBG/AMD pin, as shown in the
Figure
The SS/LTBG/AMD pin is also used to set the soft-start time, so the current flowing from
SS/LTBG/AMD pin has to be modified only after the soft-start has been finished.
Using the D diode and R3 resistor (red square in
flowing from SS/LTBG/AMD pin versus SGND is zero, so the internal gain is not modified.As
a consequence the LTB™ gain is the default value (LTB™ gain = 2).
To decrease the LTB™ gain it is necessary to use the circuit composed by Q, R1 and R2
(blue square in
After the soft-start the current flowing from SS/LTBG/AMD pin depends only on R1 resistor,
so reducing the R1 resistor value the LTB™ gain can be reduced. The sum of R1 and R2
resistors have to be selected to have the desiderated soft-start time.
Figure 13. SS/OSC/LTB connections to modify LTB™ gain when using INTEL mode
13.
to SSEND Logic
V
Figure
Pull-Up
(1.2V)
13.)
R
Pull-Up
(1k)
SS_END
D
R
b
(10k)
Figure
R3
Q
SS/LTBG/ AMD
13), after the soft-start the current
R1
R2
LTB GAIN=2
LTB GAIN <2
L6713A