Richtek RT8166BZQW Schematic [ru]
®
RT8166B
Dual Single-Phase PWM Controller for CPU and GPU Core
Power Supply
General Description
The RT8166B is a dual single-pha se PWM controller with
integrated MOSFET drivers, compliant with Intel IMVP7
Pulse Width Modulation Specification to support both
CPU core and GPU core power. This part a dopts G-NA VP
(Green-Native A VP), which is a Richtek proprietary topology
derived from finite DC gain compen sator in consta nt ontime control mode. G-NAVPTM makes this part an easy
setting PWM controller to meet all Intel AVP (Active
V oltage Positioning) mobile CPU/GPU requirements. The
RT8166B uses SVID interface to control a n 8-bit DAC for
output voltage programming. The built-in high accuracy
DAC converts the received VID code into a voltage value
ranging from 0V to 1.52V with 5mV step voltage. The
system accuracy of the controller can reach 0.8%. The
RT8166B operates in continuous conduction mode or
diode emulation mode, according to the SVID command.
The maximum efficiency ca n reach up to 90% in dif ferent
operating modes according to different load conditions.
The droop function (load line) can be ea sily progra mmed
by setting the DC gain of the error amplifier. With proper
compensation, the load transient response can achieve
optimized A VP performance.
The output voltage transition slew rate is set vi a the SVID
interface. The RT8166B supports both DCR and sense
resistor current sensing. The RT8166B provides
VR_READY and thermal throttling output signals for
IMVP7 CPU and GPU core. This part also features
complete fault protection functions including over voltage,
under voltage, negative voltage, over current and thermal
shutdown.
TM
Features
Dual Single-Phase PWM Controller for CPU Core
and GPU Core Power
IMVP7 Compatible Power Management States
Serial VID Interface
G-NAV P
A V P f or CPU VR Only
0.5% DAC Accuracy
0.8% System Accuracy
Differential Remote Voltage Sensing
Built-in ADC for Platform Programming
SETINI/SETINIA for CPU/GPU Core VR Initial
TM
T opology
Startup Voltage
TMPMAX to Set Platform Maximum Temperature
ICCMAX/ICCMAXA for CPU/GPU Core VR
Maximum Current
Power Good Indicator : VR_READY/VRA_READY for
CPU/GPU Core Power
Thermal Throttling Indicator : VRHOT
Diode Emulation Mode at Light Load Condition
Fast Line/Load Transient Response
Switching Frequency up to 1MHz per Phase
OVP, UVP, NVP, OTP, UVLO, OCP
Small 40-Lead WQFN Package
RoHS Compliant and Halogen Free
Applications
IMVP7 Intel CPU/GPU Core Power Supply
Laptop Computers
A VP Step-Down Converter
The RT8166B is available in a WQFN-40L 5x5 small
footprint pack age.
Marking Information
RT8166BZQW : Product Number
RT8166B
ZQW
YMDNN
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
DS8166B-03 November 2013 www.richtek.com
©
YMDNN : Date Code
1
RT8166B
Ordering Information
RT8166B
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
Z : ECO (Ecological Element with
Halogen Free and Pb free)
Note :
Richtek products are :
RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Pin Configurations
(TOP VIEW)
UGATE1
PHASE1
LGATE1
PVCC
LGATEA
PHASEA
FB
VCC
10
1
2
3
4
5
6
7
8
9
SETINI
ICCMAX
TMPMAX
ICCMAXA
WQFN-40L 5x5
GND
TSEN
OCSET
BOOT1
TONSET
ISEN1P
ISEN1N
COMP
RGND
GFXPS2
SETINIA
UGATEA
BOOTAENTONSETA
41
TSENA
OCSETA
31323334353637383940
20191817161514131211
IBIAS
VRHOT
30
ISENAP
29
ISENAN
28
COMPA
27
FBA
26
RGNDA
25
VCLK
24
VDIO
23
ALERT
22
VRA_READY
21
VR_READY
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
©
DS8166B-03 November 2013www.richtek.com
2
Typical Application Circuit
1
R
V
C
C
2
.
V
R
V
V
V
V
V
A
L
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ICCMAXA
GFXPS2
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k
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k
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9
k
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6
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T
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1
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k
k
3
=
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7
1
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1
k
2
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k
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5
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1
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7
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k
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k
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4
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k
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8
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k
RT8166B
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CORE
1
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CORE VSS SENSE
V
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µ
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1
0
2
Chip Enable
Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.
©
3
N
E
DS8166B-03 November 2013 www.richtek.com
3
RT8166B
Table 1. IMVP7/VR12 Compliant VID Table
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 VDAC Voltage
0 0 0 0 0 0 0 0 0 0 0.000
0 0 0 0 0 0 0 1 0 1 0.250
0 0 0 0 0 0 1 0 0 2 0.255
0 0 0 0 0 0 1 1 0 3 0.260
0 0 0 0 0 1 0 0 0 4 0.265
0 0 0 0 0 1 0 1 0 5 0.270
0 0 0 0 0 1 1 0 0 6 0.275
0 0 0 0 0 1 1 1 0 7 0.280
0 0 0 0 1 0 0 0 0 8 0.285
0 0 0 0 1 0 0 1 0 9 0.290
0 0 0 0 1 0 1 0 0 A 0.295
0 0 0 0 1 0 1 1 0 B 0.300
0 0 0 0 1 1 0 0 0 C 0.305
0 0 0 0 1 1 0 1 0 D 0.310
0 0 0 0 1 1 1 0 0 E 0.315
0 0 0 0 1 1 1 1 0 F 0.320
0 0 0 1 0 0 0 0 1 0 0.325
0 0 0 1 0 0 0 1 1 1 0.330
0 0 0 1 0 0 1 0 1 2 0.335
0 0 0 1 0 0 1 1 1 3 0.340
0 0 0 1 0 1 0 0 1 4 0.345
0 0 0 1 0 1 0 1 1 5 0.350
0 0 0 1 0 1 1 0 1 6 0.355
0 0 0 1 0 1 1 1 1 7 0.360
0 0 0 1 1 0 0 0 1 8 0.365
0 0 0 1 1 0 0 1 1 9 0.370
0 0 0 1 1 0 1 0 1 A 0.375
0 0 0 1 1 0 1 1 1 B 0.380
0 0 0 1 1 1 0 0 1 C 0.385
0 0 0 1 1 1 0 1 1 D 0.390
0 0 0 1 1 1 1 0 1 E 0.395
0 0 0 1 1 1 1 1 1 F 0.400
0 0 1 0 0 0 0 0 2 0 0.405
0 0 1 0 0 0 0 1 2 1 0.410
0 0 1 0 0 0 1 0 2 2 0.415
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RT8166B
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
0 0 1 0 0 0 1 1 2 3 0.420
0 0 1 0 0 1 0 0 2 4 0.425
0 0 1 0 0 1 0 1 2 5 0.430
0 0 1 0 0 1 1 0 2 6 0.435
0 0 1 0 0 1 1 1 2 7 0.440
0 0 1 0 1 0 0 0 2 8 0.445
0 0 1 0 1 0 0 1 2 9 0.450
0 0 1 0 1 0 1 0 2 A 0.455
0 0 1 0 1 0 1 1 2 B 0.460
0 0 1 0 1 1 0 0 2 C 0.465
0 0 1 0 1 1 0 1 2 D 0.470
0 0 1 0 1 1 1 0 2 E 0.475
0 0 1 0 1 1 1 1 2 F 0.480
0 0 1 1 0 0 0 0 3 0 0.485
0 0 1 1 0 0 0 1 3 1 0.490
0 0 1 1 0 0 1 0 3 2 0.495
0 0 1 1 0 0 1 1 3 3 0.500
0 0 1 1 0 1 0 0 3 4 0.505
0 0 1 1 0 1 0 1 3 5 0.510
0 0 1 1 0 1 1 0 3 6 0.515
0 0 1 1 0 1 1 1 3 7 0.520
0 0 1 1 1 0 0 0 3 8 0.525
0 0 1 1 1 0 0 1 3 9 0.530
0 0 1 1 1 0 1 0 3 A 0.535
0 0 1 1 1 0 1 1 3 B 0.540
0 0 1 1 1 1 0 0 3 C 0.545
0 0 1 1 1 1 0 1 3 D 0.550
0 0 1 1 1 1 1 0 3 E 0.555
0 0 1 1 1 1 1 1 3 F 0.560
0 1 0 0 0 0 0 0 4 0 0.565
0 1 0 0 0 0 0 1 4 1 0.570
0 1 0 0 0 0 1 0 4 2 0.575
0 1 0 0 0 0 1 1 4 3 0.580
0 1 0 0 0 1 0 0 4 4 0.585
0 1 0 0 0 1 0 1 4 5 0.590
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RT8166B
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
0 1 0 0 0 1 1 0 4 6 0.595
0 1 0 0 0 1 1 1 4 7 0.600
0 1 0 0 1 0 0 0 4 8 0.605
0 1 0 0 1 0 0 1 4 9 0.610
0 1 0 0 1 0 1 0 4 A 0.615
0 1 0 0 1 0 1 1 4 B 0.620
0 1 0 0 1 1 0 0 4 C 0.625
0 1 0 0 1 1 0 1 4 D 0.630
0 1 0 0 1 1 1 0 4 E 0.635
0 1 0 0 1 1 1 1 4 F 0.640
0 1 0 1 0 0 0 0 5 0 0.645
0 1 0 1 0 0 0 1 5 1 0.650
0 1 0 1 0 0 1 0 5 2 0.655
0 1 0 1 0 0 1 1 5 3 0.660
0 1 0 1 0 1 0 0 5 4 0.665
0 1 0 1 0 1 0 1 5 5 0.670
0 1 0 1 0 1 1 0 5 6 0.675
0 1 0 1 0 1 1 1 5 7 0.680
0 1 0 1 1 0 0 0 5 8 0.685
0 1 0 1 1 0 0 1 5 9 0.690
0 1 0 1 1 0 1 0 5 A 0.695
0 1 0 1 1 0 1 1 5 B 0.700
0 1 0 1 1 1 0 0 5 C 0.705
0 1 0 1 1 1 0 1 5 D 0.710
0 1 0 1 1 1 1 0 5 E 0.715
0 1 0 1 1 1 1 1 5 F 0.720
0 1 1 0 0 0 0 0 6 0 0.725
0 1 1 0 0 0 0 1 6 1 0.730
0 1 1 0 0 0 1 0 6 2 0.735
0 1 1 0 0 0 1 1 6 3 0.740
0 1 1 0 0 1 0 0 6 4 0.745
0 1 1 0 0 1 0 1 6 5 0.750
0 1 1 0 0 1 1 0 6 6 0.755
0 1 1 0 0 1 1 1 6 7 0.760
0 1 1 0 1 0 0 0 6 8 0.765
0 1 1 0 1 0 0 1 6 9 0.770
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RT8166B
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
0 1 1 0 1 0 1 0 6 A 0.775
0 1 1 0 1 0 1 1 6 B 0.780
0 1 1 0 1 1 0 0 6 C 0.785
0 1 1 0 1 1 0 1 6 D 0.790
0 1 1 0 1 1 1 0 6 E 0.795
0 1 1 0 1 1 1 1 6 F 0.800
0 1 1 1 0 0 0 0 7 0 0.805
0 1 1 1 0 0 0 1 7 1 0.810
0 1 1 1 0 0 1 0 7 2 0.815
0 1 1 1 0 0 1 1 7 3 0.820
0 1 1 1 0 1 0 0 7 4 0.825
0 1 1 1 0 1 0 1 7 5 0.830
0 1 1 1 0 1 1 0 7 6 0.835
0 1 1 1 0 1 1 1 7 7 0.840
0 1 1 1 1 0 0 0 7 8 0.845
0 1 1 1 1 0 0 1 7 9 0.850
0 1 1 1 1 0 1 0 7 A 0.855
0 1 1 1 1 0 1 1 7 B 0.860
0 1 1 1 1 1 0 0 7 C 0.865
0 1 1 1 1 1 0 1 7 D 0.870
0 1 1 1 1 1 1 0 7 E 0.875
0 1 1 1 1 1 1 1 7 F 0.880
1 0 0 0 0 0 0 0 8 0 0.885
1 0 0 0 0 0 0 1 8 1 0.890
1 0 0 0 0 0 1 0 8 2 0.895
1 0 0 0 0 0 1 1 8 3 0.900
1 0 0 0 0 1 0 0 8 4 0.905
1 0 0 0 0 1 0 1 8 5 0.910
1 0 0 0 0 1 1 0 8 6 0.915
1 0 0 0 0 1 1 1 8 7 0.920
1 0 0 0 1 0 0 0 8 8 0.925
1 0 0 0 1 0 0 1 8 9 0.930
1 0 0 0 1 0 1 0 8 A 0.935
1 0 0 0 1 0 1 1 8 B 0.940
1 0 0 0 1 1 0 0 8 C 0.945
1 0 0 0 1 1 0 1 8 D 0.950
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RT8166B
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
1 0 0 0 1 1 1 0 8 E 0.955
1 0 0 0 1 1 1 1 8 F 0.960
1 0 0 1 0 0 0 0 9 0 0.965
1 0 0 1 0 0 0 1 9 1 0.970
1 0 0 1 0 0 1 0 9 2 0.975
1 0 0 1 0 0 1 1 9 3 0.980
1 0 0 1 0 1 0 0 9 4 0.985
1 0 0 1 0 1 0 1 9 5 0.990
1 0 0 1 0 1 1 0 9 6 0.995
1 0 0 1 0 1 1 1 9 7 1.000
1 0 0 1 1 0 0 0 9 8 1.005
1 0 0 1 1 0 0 1 9 9 1.010
1 0 0 1 1 0 1 0 9 A 1.015
1 0 0 1 1 0 1 1 9 B 1.020
1 0 0 1 1 1 0 0 9 C 1.025
1 0 0 1 1 1 0 1 9 D 1.030
1 0 0 1 1 1 1 0 9 E 1.035
1 0 0 1 1 1 1 1 9 F 1.040
1 0 1 0 0 0 0 0 A 0 1.045
1 0 1 0 0 0 0 1 A 1 1.050
1 0 1 0 0 0 1 0 A 2 1.055
1 0 1 0 0 0 1 1 A 3 1.060
1 0 1 0 0 1 0 0 A 4 1.065
1 0 1 0 0 1 0 1 A 5 1.070
1 0 1 0 0 1 1 0 A 6 1.075
1 0 1 0 0 1 1 1 A 7 1.080
1 0 1 0 1 0 0 0 A 8 1.085
1 0 1 0 1 0 0 1 A 9 1.090
1 0 1 0 1 0 1 0 A A 1.095
1 0 1 0 1 0 1 1 A B 1.100
1 0 1 0 1 1 0 0 A C 1.105
1 0 1 0 1 1 0 1 A D 1.110
1 0 1 0 1 1 1 0 A E 1.115
1 0 1 0 1 1 1 1 A F 1.120
1 0 1 1 0 0 0 0 B 0 1.125
1 0 1 1 0 0 0 1 B 1 1.130
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RT8166B
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
1 0 1 1 0 0 1 0 B 2 1.135
1 0 1 1 0 0 1 1 B 3 1.140
1 0 1 1 0 1 0 0 B 4 1.145
1 0 1 1 0 1 0 1 B 5 1.150
1 0 1 1 0 1 1 0 B 6 1.155
1 0 1 1 0 1 1 1 B 7 1.160
1 0 1 1 1 0 0 0 B 8 1.165
1 0 1 1 1 0 0 1 B 9 1.170
1 0 1 1 1 0 1 0 B A 1.175
1 0 1 1 1 0 1 1 B B 1.180
1 0 1 1 1 1 0 0 B C 1.185
1 0 1 1 1 1 0 1 B D 1.190
1 0 1 1 1 1 1 0 B E 1.195
1 0 1 1 1 1 1 1 B F 1.200
1 1 0 0 0 0 0 0 C 0 1.205
1 1 0 0 0 0 0 1 C 1 1.210
1 1 0 0 0 0 1 0 C 2 1.215
1 1 0 0 0 0 1 1 C 3 1.220
1 1 0 0 0 1 0 0 C 4 1.225
1 1 0 0 0 1 0 1 C 5 1.230
1 1 0 0 0 1 1 0 C 6 1.235
1 1 0 0 0 1 1 1 C 7 1.240
1 1 0 0 1 0 0 0 C 8 1.245
1 1 0 0 1 0 0 1 C 9 1.250
1 1 0 0 1 0 1 0 C A 1.255
1 1 0 0 1 0 1 1 C B 1.260
1 1 0 0 1 1 0 0 C C 1.265
1 1 0 0 1 1 0 1 C D 1.270
1 1 0 0 1 1 1 0 C E 1.275
1 1 0 0 1 1 1 1 C F 1.280
1 1 0 1 0 0 0 0 D 0 1.285
1 1 0 1 0 0 0 1 D 1 1.290
1 1 0 1 0 0 1 0 D 2 1.295
1 1 0 1 0 0 1 1 D 3 1.300
1 1 0 1 0 1 0 0 D 4 1.305
1 1 0 1 0 1 0 1 D 5 1.310
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VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
1 1 0 1 0 1 1 0 D 6 1.315
1 1 0 1 0 1 1 1 D 7 1.320
1 1 0 1 1 0 0 0 D 8 1.325
1 1 0 1 1 0 0 1 D 9 1.330
1 1 0 1 1 0 1 0 D A 1.335
1 1 0 1 1 0 1 1 D B 1.340
1 1 0 1 1 1 0 0 D C 1.345
1 1 0 1 1 1 0 1 D D 1.350
1 1 0 1 1 1 1 0 D E 1.355
1 1 0 1 1 1 1 1 D F 1.360
1 1 1 0 0 0 0 0 E 0 1.365
1 1 1 0 0 0 0 1 E 1 1.370
1 1 1 0 0 0 1 0 E 2 1.375
1 1 1 0 0 0 1 1 E 3 1.380
1 1 1 0 0 1 0 0 E 4 1.385
1 1 1 0 0 1 0 1 E 5 1.390
1 1 1 0 0 1 1 0 E 6 1.395
1 1 1 0 0 1 1 1 E 7 1.400
1 1 1 0 1 0 0 0 E 8 1.405
1 1 1 0 1 0 0 1 E 9 1.410
1 1 1 0 1 0 1 0 E A 1.415
1 1 1 0 1 0 1 1 E B 1.420
1 1 1 0 1 1 0 0 E C 1.425
1 1 1 0 1 1 0 1 E D 1.430
1 1 1 0 1 1 1 0 E E 1.435
1 1 1 0 1 1 1 1 E F 1.440
1 1 1 1 0 0 0 0 F 0 1.445
1 1 1 1 0 0 0 1 F 1 1.450
1 1 1 1 0 0 1 0 F 2 1.455
1 1 1 1 0 0 1 1 F 3 1.460
1 1 1 1 0 1 0 0
1 1 1 1 0 1 0 1 F 5 1.470
1 1 1 1 0 1 1 0 F 6 1.475
1 1 1 1 0 1 1 1 F 7 1.480
1 1 1 1 1 0 0 0
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F 4
F 8
DS8166B-03 November 2013www.richtek.com
1.465
1.485
RT8166B
VID7 VID6 VID5 VID4 VID3 VID2 VID1 VID0 H1 H0 DAC Voltage
1 1 1 1 1 0 0 1 F 9 1.490
1 1 1 1 1 0 1 0 F A 1.495
1 1 1 1 1 0 1 1 F B 1.500
1 1 1 1 1 1 0 0 F C 1.505
1 1 1 1 1 1 0 1 F D 1.510
1 1 1 1 1 1 1 0 F E 1.515
1 1 1 1 1 1 1 1 F F 1.520
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11
RT8166B
Functional Pin Description
Pin No. Pin Name Pin Function
1 BOOT1
2 TONSET
3 ISEN1P Positive Current Sense Input Pin of CPU VR.
4 ISEN1N Negative Current Sense Input Pin of CPU VR.
5 COMP CPU VR Compensation Pin. This pin is the output of the error amplifier.
6 FB CPU VR Feedback Pin. This pin is the inverting input node of the error amplifier.
7 RGND
8 GFXPS2
9 VCC
10 SETINIA ADC Input for Single-Phase GPU VR VBOOT Voltage Setting.
11 SETINI ADC Input for Single-Phase CPU VR VBOOT Voltage Setting.
12 TMPMAX ADC Input for Single-Phase CPU VR Maximum Temperature Setting.
13 ICCMAX ADC Input for Single-Phase CPU VR Maximum Current Setting.
14 ICCMAXA ADC Input for Single-Phase GPU VR Max imum Current Setting.
15 TSEN Thermal Monitor Sense Input Pin for CPU VR.
16 OCSET
17 TSENA Thermal Monitor Sense Input for GPU VR.
18 OCSETA
19 IBIAS
20
VRHOT
21 VR_READY CPU VR Voltage Ready Indicator. This pin has an open drain output.
22 VRA_READY GPU VR Voltage Ready Indicator. This pin has an open drain output.
23
ALERT
24 VDIO Data Transmission Line of SVID Interface.
25 VCLK Clock Signal Line of SVID Interface.
26 RGNDA
27 FBA GPU VR Feedback Pin. This pin is the inverting input node of the error amplifier.
28 COMPA
29 ISENAN Negative Current Sense Input Pin of Single- Phase GPU VR.
30 ISENAP Positive Current Sense Input Pin of Single-Phase GPU VR.
31 TONSETA
CPU VR Bootstrap Power Pin. Thi s pin powers the high side MOSFET drivers.
Connect this pin to the PHASE1 pin with a bootstrap capacitor.
Single-Phase CPU VR On-Time Setting Pin. Connect this pin to V
resistor to set ripple size in PWM mode.
Return Ground for CPU VR. This pin is the inverti ng input node for dif ferential
remote voltage sens ing.
Set Pin for GPU VR Operation Mode. Logic-high on this pin will force the GPU V R
to enter DCM.
Controller Power Supply Pin. Connect this pi n to GND via a ceramic capacitor
larger than 1F.
Set Pin for Single-Phase CPU VR Over Current Protection Threshold.
Connect a resistive voltage divider from VCC to ground, and connect the joint of
the voltage divider to the OCSET pin. The voltage, V
over current threshold, I
, for CPU VR.
LIMIT
, at this pin sets the
OCSET
Set Pin for Single-Phase GPU VR Over Current Protection Threshold.
Connect a resistive voltage divider from VCC to ground, and connect the joint of
the voltage divider to the OCSETA pin. The voltage, V
over current threshold, I
, for GPU VR.
LIMIT
OCSETA
, at this pin sets the
Internal Bias Current Setting. Connect a 53.6k resistor from t his pin to GND to
set the internal bias current.
Therm al Monitor Output Pin (active low).
Alert Line of SVID Interface (active low). This pin has an open drain output.
Return Ground for Single-Phase GPU VR.
This pin is the inverting input node for differential remote voltage sensing.
Single-Phase GPU VR Compensation Pin. This pin is the output of the error
amplifier.
Single-Phase GPU VR On-Time Setting Pin. Connect this pin to VIN with a
resistor to set ripple size in PWM mode.
with a
IN
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