L6722TR STMicroelectronics, L6722TR Datasheet - Page 23

• Manufacturer Part Number: L6722TR
• Description: IC BUCK ADJ 2A TRPL 36VFQFPN
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6722TR

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 3
• Voltage - Output: Adj to 0.8V
• Current - Output: 2A
• Frequency - Switching: 100kHz
• Voltage - Input: 12V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 36-VFQFN, 36-VFQFPN
• Power - Output: 3.5W
• Operating Temperature Range: - 40 C to + 125 C
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-5904-2

L6722
9.4
Figure 12. output voltage protections and typical principle connections
Feedback disconnection
Output voltage i monitored by the device in two different points:
●
●
By comparing the voltage present at these two different locations, L6722 is able to understand
if the output voltage feedback is connected. When CS- is more than 1.375V higher than VSEN,
(See
drives high the FAULT pin. The condition is latched until VCC or INH cycled.
Figure 13. Feedback disconnection
UVLO
UVLO
PHASE1
PHASE2
PHASE3
Remotely, through the remote buffer, across VSEN
Locally across the CS- pin (negligibly offset by
Figure
VCC
OVP
V cc
13) the device stops switching with the low side mosfets permanently ON and
R
D
Preliminary OVP
R
CS_DROOP+
D
FBR Monitor
R
(INH = 0)
D
Preliminary OVP Enabled
C
L1
L2
L3
D
FBR Monitored
No Protection
Provided
R
DCR1
DCR2
DCR3
G
VSEN Monitored
OVP Protection
CS_DROOP-
(INH = Free)
I
INFO
x 3
V
OUT
I
DROOP
VID
FB
+5V
R
R
+12V
D
F
R
⋅
SB
FB
I
CS
9 Output voltage monitor and protections
C
).
F
FB_DISCONNECTED
1V
COMP
VSEN
FBR
VCC
FBG
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