RT8802AGQV RICHTEK [Richtek Technology Corporation], RT8802AGQV Datasheet - Page 3

• Manufacturer Part Number: RT8802AGQV
• Description: 2/3/4/5-Phase PWM Controller for High-Density Power Supply
• Manufacturer: RICHTEK [Richtek Technology Corporation]

Functional Pin Description
VTT/EN (Pin 1)
The pin is defined as the chip enable, and the VTT is
applied for internal VID pull high power and power sequence
monitoring.
VR_Ready (Pin 2)
Power good open-drain output.
FBRTN (Pin 3)
Feedback return pin. VID DAC and error amplifier reference
for remote sensing of the output voltage.
FB (Pin 4)
Inverting input pin of the internal error amplifier.
COMP (Pin 5)
Output pin of the error amplifier and input pin of the PWM
comparator.
SS (Pin 6)
Connect this SS pin to GND with a capacitor to set the
soft-start time interval.
QRSEL (Pin 7)
Quick response mode select pin. When QRSEL = GND
and quick response is triggered during heavy load to light
load transient, 2 channels will turn on simultaneously to
prevent V
response is triggered, all channels will turn on
simultaneously to prevent V
VR_FAN (Pin 8)
The pin is defined to signal VR thermal information for
external VR thermal dissipation scheme triggering.
VR_HOT (Pin 9)
The pin is defined to signal VR thermal information for
external VR thermal dissipation scheme triggering.
TSEN (Pin 10)
Temperature detect pin for VR_HOT and VR_FAN.
DS8802A-04 August 2007
OUT
undershoot. When QRSEL = NC and quick
OUT
All brandname or trademark belong to their owner respectively
undershoot.
IOUT (Pin 11)
Output current indication pin. The current through IOUT
pin is proportional to the total output current.
DVD (Pin 12)
Programmable power UVLO detection input. Trip threshold
is 1V at V
RT (Pin 13)
The pin is defined to set internal switching operation
frequency. Connect this pin to GND with a resistor R
set the frequency F
OFS (Pin 14)
The pin is defined for load line offset setting.
ADJ (Pin 15)
Current sense output for active droop adjusting. Connect
a resistor from this pin to GND to set the load droop.
TCOC (Pin 16)
Input pin for setting thermally compensated over current
trigger point. Voltage on the pin is compared with V
V
IMAX (Pin 17)
The pin is defined to set threshold of over current.
ISN1 (Pin 18)
Current sense negative input pin for channel 1 current
sensing.
ISN24 (Pin 19)
Current sense negative input pins for channel 2 and
channel 4 current sensing.
ISN35 (Pin 20)
Current sense negative input pins for channel 3 and
channel 5 current sensing.
ADJ
F
SW
> V
=
TCOC
R
DVD
4.463
RT
rising.
then OCP is triggered.
+
3500
e
9
SW
.
RT8802A
www.richtek.com
ADJ
RT
. If
to
3