L6711TR STMicroelectronics, L6711TR Datasheet - Page 32

• 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

Soft start
13
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Soft start
During soft start, a ramp is generated increasing the loop reference from 0V to the final
value programmed by VID in 2048 clock periods as shown in
Figure
begin to switch and the output voltage starts to increase with closed loop regulation. At the
end of the digital soft start, the SS_END signal is then driven high.
The Under Voltage comparator is enabled when the reference voltage reaches 0.6V while
Over Voltage Comparator is always enabled during soft start with a threshold equal to the
115% of the programmed reference or the threshold programmed by R
section).
Figure 15. Soft start
V
CC
15. Once the soft start begins, the reference is increased: upper and lower MOS
=V
V
SS_END
LGATEx
V
CCDR
OUT
2048 Clock Cycles
(CH1=VOUT; CH2=LGATEx; CH3=SS_END)
Turn ON threshold
t
t
t
t
OVP
(see relevant
L6711