RT8170A Datasheet, PDF (3/45 Pages) Richtek Technology Corporation – Single-Phase Controller with Integrated Driver

RT8170A
Pin No.
20
21
Pin Name
VSEN
RGND
22
VCC
23
SET1
24
SET2
25
SET3
26
IBIAS
27
TSEN
28
VR_HOT
29
VDIO
30
ALERT
31
VCLK
32
TONSET
33
(Exposed Pad)
GND
Pin Function
VR Voltage Sense Input. This pin is connected to the terminal of VR output
voltage.
Return Ground for VR. This pin is the negative node of the differential remote
voltage sensing.
Supply Voltage Input. Connect this pin to 5V and place a decoupling capacitor
2.2F at least. The decoupling capacitor should be placed as close to the PWM
controller as possible.
1^st Platform Setting. Platform can use this pin to set DVID compensation time,
RSET, DVID compensation width and OCS.
2^nd Platform Setting. Platform can use this pin to set ICCMAX, QRTH and
QRWIDTH.
3^rd Platform Setting. Platform can use this to set Anti-ov ershoot function, zero
load-line, DVID slew rate, RSET selection at PS0 and PS1, Anti-Overshoot
enhancement and ZCD threshold.
Internal Bias Current Setting. Connect a 100k resistor from this pin tied to
GND to set the internal current. Don’t connect a bypass pass capacitor from this
pin to GND.
Thermal Sense Input for CORE VR.
Thermal Monitor Output. (Active Low)
VR and CPU Data Transmission Interface.
SVID Alert. (Active low)
Synchronous Clock from the CPU.
On-time Setting. An on-time setting resistor is connected from this pin to input
voltage.
Ground. The exposed pad must be soldered to a large PCB and connected to
GND for maximum power dissipation.
Copyright ©2013 Richtek Technology Corporation. All rights reserved.
DS8170A-00 November 2013
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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