L6711TR STMicroelectronics, L6711TR Datasheet - Page 28

• Manufacturer Part Number: L6711TR
• Description: IC CTRLR 3PHASE VID/DACS 48-TQFP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6711TR

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 0.8 ~ 1.55 V
• Current - Output: 2A
• Frequency - Switching: 150kHz
• Voltage - Input: 12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 48-TQFP Exposed Pad, 48-eTQFP, 48-HTQFP, 48-VQFP
• Power - Output: 2.5W
• Output Voltage: 0.8 V to 1.581 V
• Output Current: 95 A
• Input Voltage: 13.8 V
• Mounting Style: SMD/SMT
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5363-2; L6711TR

Dynamic VID transitions
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Dynamic VID transitions
The device is able to manage Dynamic VID Code changes that allow Output Voltage
modification during normal device operation.
OVP and UVP signals are masked during every VID transition and they are re-activated
after the transition finishes.
When changing dynamically the regulated voltage (D-VID), the system needs to charge or
discharge the output capacitor accordingly. This means that an extra-current I
be delivered, especially when increasing the output regulated voltage and it must be
considered when setting the over current threshold. This current result:
where dV
and T
Overcoming the OC threshold during the dynamic VID causes the device to enter the
constant current limitation slowing down the output voltage dV/dt also causing the failure in
the D-VID test.
The way in which the device modifies the reference depends on the VID_SEL status and
then on the kind of DAC selected.
Figure 13. Dynamic VID transition, VRD10.x DAC
I
D VID
–
VID
Int. Reference
=
VID Clock
is the time interval between each LSB transition.
OUT
C
------------------------------------- -
VID [0,5]
OUT
V out
dT
is the selected DAC LSB (12.5mV for VRD10.x or 25mV for Hammer DAC)
VID
dV
OUT
T sw /3
T sw
x 4 Step VID Transition
VRD10.x DAC
T
4 x 1 Step VID Transition - VRD10.x DAC
VID
D-VID
needs to
t
t
t
t
L6711