Richtek RT8168BGQW Schematic [ru]
RT8168B
Dual Single-Phase PWM Controller for CPU and GPU Core
Power Supply
General Description
The RT8168B 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
RT8168B 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
RT8168B 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 RT8168B supports both DCR and sense
resistor current sensing. The RT8168B 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
zz
z Dual Single-Phase PWM Controller for CPU Core
zz
and GPU Core Power
zz
z IMVP7 Compatible Power Management States
zz
zz
z Serial VID Interface
zz
zz
z G-NAV P
zz
zz
z A V P f or CPU VR Only
zz
zz
z 0.5% DAC Accuracy
zz
zz
z 0.8% System Accuracy
zz
zz
z Differential Remote Voltage Sensing
zz
zz
z Built-in ADC for Platform Programming
zz
` 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
zz
z Power Good Indicator : VR_READY/VRA_READY for
zz
CPU/GPU Core Power
zz
z Thermal Throttling Indicator : VRHOT
zz
zz
z Diode Emulation Mode at Light Load Condition
zz
zz
z Fast Line/Load Transient Response
zz
zz
z Switching Frequency up to 1MHz per Phase
zz
zz
z OVP, UVP, NVP, OTP, UVLO, OCP
zz
zz
z Small 40-Lead WQFN Package
zz
zz
z RoHS Compliant and Halogen Free
zz
Applications
z IMVP7 Intel CPU/GPU Core Power Supply
z Laptop Computers
z A VP Step-Down Converter
The RT8168B is available in a WQFN-40L 5x5 small
footprint pack age.
DS8168B-00 November 2011 www.richtek.com
1
RT8168B
Ordering Information
RT8168B
Package Type
QW : WQFN-40L 5x5 (W-Type)
Lead Plating System
G : Green (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.
Marking Information
RT8168BGQW : Product Number
RT8168B
GQW
YMDNN
YMDNN : Date Code
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
DS8168B-00 November 2011www.richtek.com
2
Typical Application Circuit
1
R
V
C
C
.
2
2
C
1
F
µ
1
8
R
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1
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6
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2
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k
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1
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3
0
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k
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C
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3
1
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GFXPS2
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k
RT8168B
9
RT8168B
V
C
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5
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C
L
K
4
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3
A
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CORE VSS SENSE
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µ
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m
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Chip Enable
2
N
E
DS8168B-00 November 2011 www.richtek.com
3
RT8168B
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
To be continued
DS8168B-00 November 2011www.richtek.com
4
RT8168B
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
To be continued
DS8168B-00 November 2011 www.richtek.com
5
RT8168B
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
DS8168B-00 November 2011www.richtek.com
6
To be continued
RT8168B
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
DS8168B-00 November 2011 www.richtek.com
To be continued
7
RT8168B
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
To be continued
DS8168B-00 November 2011www.richtek.com
8
RT8168B
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
DS8168B-00 November 2011 www.richtek.com
To be continued
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RT8168B
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
To be continued
DS8168B-00 November 2011www.richtek.com
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RT8168B
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
DS8168B-00 November 2011 www.richtek.com
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RT8168B
Functional Pin Description
Pin No. Pin Name Pin Function
1 BOOT1
2 TONSET
3 ISEN1P Positive Current Sense Input Pin of CPU VR.
4 ISEN 1N Negati ve C urr en t 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 Maximum 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
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 VDIO Data Transmission Line of SVID Interface.
2 5 VCLK Cl ock Signal L i ne 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 ISEN AN Neg ati ve C urr en t Sense Input Pin of Si ng le-P h as e GPU VR.
30 ISENAP Positive Current Sense Input Pin of Single-Phase GPU VR.
31 TONSETA
VRHOT
ALERT
CPU VR Boots trap P ower Pin . Thi s pin po we rs the hig h side M OSF ET driver s.
Connect this pin to the PHASE1 pin with a bootstrap capacitor.
Single-Phase CPU VR On-Time Setting Pin. Connect this pin to V
re sis tor to set ripp le si ze in PWM mode.
Retu rn Gr ound for CPU V R. Th is pin is th e inve rtin g inpu t node for differ entia l
remote voltage sensing.
Set Pin for GPU VR Operation Mode. Logic-high on this pin will force the GPU VR
to enter DCM.
Con trol ler Pow er Su pply Pin. C onnec t this pin to G ND v ia a c eramic capa citor
larger tha n 1μF.
Set Pin for Single-Phase CPU VR Over Current Protection Threshold.
Con nec t a r e sis ti ve vol tag e di vi der from VC C to g round, and c on nec t th e jo int o f
th e voltag e divid er to the O CSET pin. The v oltag e, V
over current threshold, I
Set Pin for Single-Phase GPU VR Over Current Protection Threshold.
Con nec t a r e sis ti ve vol tag e di vi der from VC C to g round, and c on nec t th e jo int o f
the voltage divider to the OCSETA pin. The voltage, V
over current threshold, I
In terna l B i as Cu rrent S et tin g. Con nec t a 53. 6k Ω re si sto r from t h is pin t o G N D t o
set the internal bias current.
Thermal 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
re sis tor to set ripp le si ze in PWM mode.
, for CPU VR.
LIMIT
, for GPU VR.
LIMIT
, at this pin sets the
OCSET
OCSETA
, at this pin sets th e
with a
IN
To be continued
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DS8168B-00 November 2011www.richtek.com
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