RT8113 RICHTEK [Richtek Technology Corporation], RT8113 Datasheet - Page 3

• Manufacturer Part Number: RT8113
• Description: Single Phase VR11.1 PWM Controller with 7-bit VID
• Manufacturer: RICHTEK [Richtek Technology Corporation]

DS8113-02 April 2011
Functional Pin Description
(Exposed Pad)
19 to 24,1
Pin No.
10
12
13
14
15
16
17
18
25
11
2
3
4
5
6
7
8
9
OCSET
FBRTN
SS
COMP
FB
ADJ
OFS
RT/EN
VCC5
ISP
ISN
LGATE
VCC12
PHASE
UGATE
BOOT
PGOOD
VID7 to VID1 DAC Voltage Identification Inputs.
GND
Pin Name
Over Current Protection Threshold Set Pin.
Return Ground. This pin is Negative Node of the differential Remote Voltage
sending.
Soft-Start Ramp Slope Set Pin. Connect this pin to FBRTN by a Capacitor to
Adjust soft-start slew rate.
Compensation Pin. Output of Error Amplifier and Input of PWM comparator.
Inverting Input of Error Amplifier.
Droop Set Pin. Connect a resistor from this pin to GND sets the load line slope.
Voltage Offset Pin. This pin sets No-Load Output Voltage Offset. Connect a
resistor from this Pin to VCC5 or GND to bidirection set the output voltage
no-load offset.
Switching Frequency Set Pin. Connect this pin to GND via a resistor to adjust
switching frequency and operate with droop function.
Connect this pin to VCC5 via a resistor to adjust switching frequency and operate
without droop function.
Internal 5V Regulator Output.
Non-Invertering Input of Current Sense Amplifier.
Invertering Input of Current Sense Amplifier.
Lower Gate Driver. This pin drives the gate of low side MOSFETs.
12V Power Supply Input Pin.
Switch Node of High side Driver. Connect this pin to high-side MOSFETs sources
together with the low side MOSFETs drains and inductor.
Upper Gate Driver. This pin drives the gate of the high-side MOSFETs.
Bootstrap Power Pin. This pin powers the high-side MOSFETs drivers. Connect
this pin to the junction of the bootstrap capacitor with the cathode of the bootstrap
diode.
Power Good Indicator.
Ground Pin. The exposed pad must be soldered to a large PCB and connected to
AGND for maximum power dissipation.
Pin Function
RT8113
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