L6713A STMicroelectronics, L6713A Datasheet - Page 37

• 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

L6713A
13
Load transient boost technology
Load transient boost LTB Technology™ (patent pending) is a L6713A feature to minimize
the count of output filter capacitors (MLCC and bulk capacitors) to respect the load transient
specifications.
The device turns on simultaneously all the phases as soon as a load transient is detected
and keep them on for the necessary time to supply the extra energy to the load. This time
depends on the COMP pin voltage and on a internal gain, in order to keep under control the
output voltage ring back.
Load transition is detected through LTB™ pin connecting a R
measures the derivate dV/dt of the output voltage and so it is able to turns on all the phases
immediately after a load transition detection, minimizing the delay intervention.
Modifying the R
design flexibility
where dV
Moreover, load transient boost LTB Technology™ gain can be easily modified in order to
keep under control the output voltage ring back.
Figure 12. LTB connections (left) and waveform (right)
Short LTB pin to SGND to disable the LTB Technology™: in this condition the device works
as a dual-edge asynchronous PWM controller.
LTB
OUT
is the output voltage drop due to load transition.
R
LTB
LTB
-C
LTB
C
LTB
values the dV/dt can be easily programmed, extending the system
C
To VCC_Core
LTB
=
R
LTB
----------------------------------------------------- -
2 π R
⋅
=
⋅
dV
----------------- -
50μA
LTB
1
OUT
⋅
N F
Load transient boost technologyTM
⋅
TM
SW
LTB
-C
LTB
vs. VOUT: the device
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