L6710 STMicroelectronics, L6710 Datasheet - Page 15

• Manufacturer Part Number: L6710
• Description: IC CTRLR 6BIT 2PH PROGR 44-TQFP
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L6710

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 2
• Voltage - Output: 0.84 ~ 1.6 V
• Current - Output: 2A
• Frequency - Switching: 150kHz
• Voltage - Input: 12V
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 44-TQFP, 44-VQFP
• Power - Output: 2.5W
• Product: Half-Bridge Drivers
• Supply Current: 12.5 mA
• Mounting Style: SMD/SMT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

is used to implement the Droop Function. This current I
the FB pin. Connecting a resistor between this pin and Vout, the total current information flows only in this
resistor because the compensation network between FB and COMP has always a capacitor in series (See
fig. 7). The voltage regulated is then equal to:
Since I
rent is given by:
Where I
The feedback current is equal to 50µA at nominal full load (I
tervention threshold, so the maximum output voltage deviation is equal to:
Figure 6. Output transient response without (a) and with (b) the droop function
Figure 7. Active Droop Function Circuit
REMOTE VOLTAGE SENSE
A remote sense buffer is integrated into the device to allow output voltage remote sense implementation
without any additional external components. In this way, the output voltage programmed is regulated be-
tween the remote buffer inputs compensating motherboard trace losses or connector losses if the device
V
NOM
FB
LOAD
depends on the current information about the two phases, the output characteristic vs. load cur-
∆ V
is the output current of the system and R
FUL L P OSITIVE
ESR DROP
–
(a)
V
OUT
–
=
LOAD
VID* R
COMP
COMP
=
–
–
R
DROOP
FB
V
OUT
⋅
50 µ A
⋅
Ref
Ref
=
I
LOAD
VID* R
V
Total Current Info (I
Total Current Info (I
V
MAX
FB
FB
MIN
=
FB
–
DROOP
VID* R
FB
(equal to the sum of both I
R
R
V
V
DROOP
DROOP
FB
FB
∆ V
⋅
–
FB
I
FB
OC INTERV ENTION
is its equivalent output resistance.
F B
= I
–
⋅
INFO1
INFO1
INFO1
R
--------------------- - I
SE NSE
ESR DROP
Rg
+I
+I
INFO2
INFO2
+ I
To V
To V
(b)
)
)
⋅
INFO2
L OAD
OUT
OUT
=
) and 70µA at the OC in-
–
R
I NFOx
FB
⋅
70 µ A
) is sourced from
L6710
V
DROOP
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