L6711TR STMicroelectronics, L6711TR Datasheet - Page 23

• 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

L6711
9
Remote voltage sense
The device embeds a Remote Sense Buffer to sense remotely the regulated voltage without
any additional external components. In this way, the output voltage programmed is
regulated between the remote buffer inputs compensating motherboard or connector
losses. The very low-offset amplifier senses the output voltage remotely through the pins
FBR and FBG (FBR is for the regulated voltage sense while FBG is for the ground sense)
and reports this voltage internally at VSEN pin with unity gain eliminating the errors.
Keeping the FBR and FBG traces parallel and guarded by a power plane results in common
mode coupling for any picked-up noise.
If remote sense is not required, it is enough connecting the resistor R
regulated voltage: VSEN becomes not connected and still senses the output voltage
through the remote buffer. In this case the FBG and FBR pins must be connected anyway to
the regulated voltage (See
Figure 8.
Warning:
FB
RB used (up to ±0.5% Accuracy)
VID
Remote buffer connections
R
R
FB
F
COMP
C
F
The remote buffer is included in the trimming chain in order
to achieve ±0.5% accuracy (0.6% for the Hammer DAC) on the
output voltage when the RB is used: eliminating it from the
control loop causes the regulation error to be increased by
the RB offset worsening the device performances!
VSEN
Figure
64k
64k
8).
FBR
(Remote Sense)
To Vcore
FBG
FB
VID
RB Not Used (Precision worsened)
R
R
FB
F
COMP
C
F
VSEN
To Vcore
Remote voltage sense
FB
64k
64k
directly to the
FBR
FBG
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