L6711 STMicroelectronics, L6711 Datasheet - Page 46

• Manufacturer Part Number: L6711
• Description: IC CTRLR 3PHASE VID/DACS 48-TQFP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6711

• 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
• Case: QFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Layout guidelines
18.3
46/50
Current sense connections.
Remote Buffer: The input connections for this component must be routed as parallel nets
from the FBG/FBR pins to the load in order to compensate losses along the output power
traces and also to avoid the pick-up of any common mode noise. Connecting these pins in
points far from the load will cause a non-optimum load regulation, increasing output
tolerance.
Current Reading: The Rg resistors have to be placed as close as possible to the CSx- and
CSx+ pins in order to limit the noise injection into the device; this is still valid also for the
R
connecting these resistors to the reading point must use dedicated nets, routed as parallel
traces in order to avoid the pick-up of any common mode noise.
Figure 24. Device orientation (left) and sense nets routing (right: red for Lsense,
It's also important to avoid any offset in the measurement and, to get a better precision, to
connect the traces as close as possible to the sensing elements. Symmetrical layout is also
suggested.
Small filtering capacitor can be needed between VOUT and SGND on the CSx- line, placed
near the controller, allowing higher layout flexibility in the current sense connection.
g(RC)
-Cg network used when sensing current across the inductor. The PCB traces
black for LSsense)
VCCDR
R
R
R
R
R
C
R
R
C
L6711