RT8167BGQW

® RT8167B Dual Single-Phase PWM Controller for CPU and GPU Core Power Supply General Description Features The RT8167B is a dual single-phase 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 adopts G-NAVPTM (Green-Native AVP), which is a Richtek proprietary topology derived from finite DC gain compensator in constant ontime control mode. G-NAVPTM makes this part an easy setting PWM controller to meet all Intel AVP (Active Voltage Positioning) mobile CPU/GPU requirements. The RT8167B uses SVID interface to control an 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 RT8167B operates in continuous conduction mode or diode emulation mode, according to the SVID command. The maximum efficiency can reach up to 90% in different operating modes according to different load conditions. The droop function (load line) can be easily programmed by setting the DC gain of the error amplifier. With proper compensation, the load transient response can achieve optimized AVP performance.  The output voltage transition slew rate is set via the SVID interface. The RT8167B supports both DCR and sense resistor current sensing. The RT8167B 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.                 Dual Single-Phase PWM Controller for CPU Core and GPU Core Power IMVP7 Compatible Power Management States Serial VID Interface G-NAVPTM Topology AVP for 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 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 AVP Step-Down Converter The RT8167B is available in a WQFN-40L 5x5 small footprint package. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8167B-01 November 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1 RT8167B Ordering Information Pin Configurations (TOP VIEW) UGATE1 PHASE1 LGATE1 PVCC LGATEA PHASEA UGATEA BOOTA EN TONSETA RT8167B Package Type QW : WQFN-40L 5x5 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Richtek products are :  RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in SnPb or Pb-free soldering processes. Marking Information RT8167BGQW : Product Number RT8167B GQW YMDNN YMDNN : Date Code Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 2 40 39 38 37 36 35 34 33 32 31 BOOT1 TONSET ISEN1P ISEN1N COMP FB RGND GFXPS2 VCC SETINIA 1 30 2 29 3 28 4 27 5 26 GND 25 6 24 7 8 41 23 22 9 21 10 ISENAP ISENAN COMPA FBA RGNDA VCLK VDIO ALERT VRA_READY VR_READY 11 12 13 14 15 16 17 18 19 20 SETINI TMPMAX ICCMAX ICCMAXA TSEN OCSET TSENA OCSETA IBIAS VRHOT Note : WQFN-40L 5x5 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B Typical Application Circuit R1 2.2 RT8167B VCC 5V C1 1µF 9 VCC VCCP R6 R7 R8 R9 TONSET 2 BOOT1 VCLK VDIO ALERT VRA_READY VR_READY VRHOT 130 130 150 10k 10k 75 25 VCLK 24 VDIO 23 ALERT 22 VRA_READY 21 VR_READY 20 VRHOT PHASE1 LGATE1 PVCC R18 8.7k R19 10k 18 OCSETA 16 OCSET 10 SETINIA 11 SETINI R24 10k R25 10k R26 NC 40 R4 0 1 R5 38 COMP R27 NC R37 33k R38 5.1k R39 1.6k R40 10k NTCT1 10k ß = 3380 R47 12k R71 750 R72 750 R52 1k BOOTA PHASEA C7 R14 3.9k Optional Optional C10 C9 Optional C11 R21 R22 R23 7 71k 10k 100 VCORE CORE VSS SENSE R34 5.1 R33 130k VIN 5V to 25V C12 0.1µF Q3 33 R36 0 C13 0.1µF 35 C14 10µF DCR = 14.6m L2 2µH Optional R42 Q4 R43 11k 15 TSEN 19 IBIAS C17 330µF /15m C16 0.1µF R45 1.2k C18 Optional Optional C19 C27 330µF /15m R44 1k NTCA 1k ß = 3650 Optional C20 GFX VCC SENSE 28 R48 R49 R50 RGNDA 26 42k 10k 100 COMPA R54 53.6k 41 (Exposed Pad) VGFX GFX VSS SENSE R51 100 32 EN Copyright © 2013 Richtek Technology Corporation. All rights reserved. November 2013 VGFX C15 17 TSENA Chip Enable NTC1 4.7k ß = 3500 R15 4.7k R16 2.4k C26 330µF /9m C5 330µF /9m C6 0.068µF 5V ISENAP 30 ISENAN 29 NTCTA 10k ß = 3380 GND DS8167B-01 R13 5 FBA 27 R53 1k Q2 R41 0 LGATEA 36 VCC R46 12k R12 0 R35 0 UGATEA 34 12 TMPMAX 13 ICCMAX 14 ICCMAXA 8 GFXPS2 ICCMAX ICCMAXA GFXPS2 VCORE R28 100 R31 R32 100k NC TMPMAX DCR = 7.6m L1 1µH Optional CORE VCC SENSE RGND VCC R30 150k C4 0.1µF 0 37 TONSETA 31 R29 51k C3 10µF Q1 39 3 ISEN1P ISEN1N 4 6 FB R20 10k OCSETA OCSET SETINIA SETINI VIN 5V to 25V C8 1µF VCC R17 27k R3 5.1 C2 0.1µF UGATE1 R10 R11 R2 130k is a registered trademark of Richtek Technology Corporation. www.richtek.com 3 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 4 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8167B-01 November 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 5 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 6 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8167B-01 November 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 7 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 8 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8167B-01 November 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 9 RT8167B 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 F 4 1.465 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 F 8 1.485 Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 10 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B 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 Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8167B-01 November 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 11 RT8167B Functional Pin Description Pin No. Pin Name Pin Function CPU VR Bootstrap Power Pin. This pin powers the high side MOSFET drivers. Connect this pin to the PHASE1 pin with a bootstrap capacitor. 1 BOOT1 2 TONSET 3 ISEN1P Single-Phase CPU VR On-Time Setting Pin. Connect this pin to VIN with a resistor to set ripple size in PWM mode. 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 7 RGND 8 GFXPS2 9 VCC 10 11 12 13 14 15 SETINIA SETINI TMPMAX ICCMAX ICCMAXA TSEN 16 OCSET 17 TSENA 18 OCSETA 19 IBIAS 20 VRHOT CPU VR Feedback Pin. This pin is the inverting input node of the error amplifier. Return Ground for CPU VR. This pin is the inverting input node for differential remote voltage sensing. Set Pin for GPU VR Operation Mode. Logic-high on this pin will force the GPU VR to enter DCM. Controller Power Supply Pin. Connect this pin to GND via a ceramic capacitor larger than 1F. ADC Input for Single-Phase GPU VR VBOOT Voltage Setting. ADC Input for Single-Phase CPU VR VBOOT Voltage Setting. ADC Input for Single-Phase CPU VR Maximum Temperature Setting. ADC Input for Single-Phase CPU VR Maximum Current Setting. ADC Input for Single-Phase GPU VR Maximum Current Setting. Thermal Monitor Sense Input Pin for CPU VR. 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, VOCSET , at this pin sets the over current threshold, ILIMIT, for CPU VR. Thermal Monitor Sense Input for GPU VR. 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, VOCSETA, at this pin sets the over current threshold, ILIMIT, for GPU VR. Internal Bias Current Setting. Connect a 53.6k resistor from this pin to GND to set the internal bias current. Thermal Monitor Output Pin (active low). 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 24 25 ALERT VDIO VCLK 26 RGNDA 27 FBA 28 COMPA 29 30 ISENAN ISENAP 31 TONSETA Alert Line of SVID Interface (active low). This pin has an open drain output. Data Transmission Line of SVID Interface. Clock Signal Line of SVID Interface. Return Ground for Single-Phase GPU VR. This pin is the inverting input node for differential remote voltage sensing. GPU VR Feedback Pin. This pin is the inverting input node of the error amplifier. Single-Phase GPU VR Compensation Pin. This pin is the output of the error amplifier. Negative Current Sense Input Pin of Single-Phase GPU VR. Positive Current Sense Input Pin of Single-Phase GPU VR. Single-Phase GPU VR On-Time Setting Pin. Connect this pin to VIN with a resistor to set ripple size in PWM mode. Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 12 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B Pin No. 32 33 34 35 36 37 38 39 40 41 (Exposed Pad) Pin Name Pin Function EN Voltage Regulator Enable Signal Input Pin. GPU VR Bootstrap Power Pin. This pin powers the high side MOSFET drivers. BOOTA Connect this pin to the PHASEA pin with a bootstrap capacitor. Upper Gate Driver of GPU VR. This pin drives the high side MOSFET of GPU UGATEA VR. Switch Node of GPU VR. This pin is the return node of the high side MOSFET PHASEA driver for GPU VR. Connect this pin to the joint of the source of high side MOSFET, drain of the low side MOSFET, and the output inductor. Lower Gate Driver of GPU VR. This pin drives the low side MOSFET of GPU LGATEA VR. MOSFET Driver Power Supply Pin. Connect this pin to GND via a ceramic PVCC capacitor larger than 1F. Lower Gate Driver of CPU VR. This pin drives the low side MOSFET of CPU LGATE1 VR. Switch Node of CPU VR. This pin is the return node of the high side driver for PHASE1 CPU VR. Connect this pin to the joint of the source of high side MOSFET, drain of the low side MOSFET, and the output inductor. Upper Gate Driver of CPU VR. This pin drives the high side MOSFET of CPU UGATE1 VR. Ground of Low Side MOSFET Driver. The exposed pad must be soldered to a GND large PCB and connected to GND for maximum power dissipation. Copyright © 2013 Richtek Technology Corporation. All rights reserved. DS8167B-01 November 2013 is a registered trademark of Richtek Technology Corporation. www.richtek.com 13 RT8167B VR_READY VRA_READY VRHOT VCC EN ICCMAXA ICCMAX TSEN TSENA SETINI SETINIA TMPMAX ALERT VDIO VCLK Function Block Diagram UVLO MUX From Control Logic ADC SVID XCVR Control & Protection Logic GFXPS2 DAC RGNDA Soft-Start & Slew Rate Control VREFA FBA ERROR AMP + - PWM CMP Offset Cancellation TON Time Generator TONSETA + - BOOTA COMPA UGATEA Driver Logic Control IBIAS From Control Logic LGATEA To Protection Logic DAC RGND OVP/UVP/NVP OCP PHASEA PVCC 10 + ISENAP - ISENAN OCSETA Soft-Start & Slew Rate Control FB VREF ERROR AMP + Offset Cancellation - PWM CMP + TON Time Generator TONSET - COMP BOOT1 UGATE1 To Protection Logic ISEN1P ISEN1N + 10 - OCP Driver Logic Control PHASE1 LGATE1 OVP/UVP/NVP OCSET Copyright © 2013 Richtek Technology Corporation. All rights reserved. www.richtek.com 14 is a registered trademark of Richtek Technology Corporation. DS8167B-01 November 2013 RT8167B Absolute Maximum Ratings               (Note 1) PVCC, VCC to GND ------------------------------------------------------------------------------------RGNDx to GND ------------------------------------------------------------------------------------------TONSETx to GND ---------------------------------------------------------------------------------------Others ------------------------------------------------------------------------------------------------------BOOTx to PHASEx -------------------------------------------------------------------------------------PHASEx to GND DC -----------------------------------------------------------------------------------------------------------