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

A

_

R

E

R

_

R

E

V

R

O

C
O

S

E
S

T

M
C

I

ICCMAXA

GFXPS2

C

C

5

V

C

C

P

C

L

K
O

D

I

E

R

T

A

D

Y

A

D

Y

H

O

T

V

C

S

E

T

C

S

E

N

T

I

I
N

I

E

T

V

C

P

M

A

X

C

M

A

X

R

4

2

1

R

R

7

6

0

3

3

1

1

0

C

R

1

7
k

7

2

A
T
A

I

R

2

4

1

k

0

C

R

2

9

k

1

5

R

3

7

k

3

3

6

N

T

C

1

T

1

0

k

k

3

=

ß

3

8

0

R

7

1

7

5

0

R

5

2

1

k

2

R

8

1

5

R
8

R

1

R
1

R
5

R

R

9

1

0

k

0

1

k

0

.

0

5

.

R
1

R
7

R
1

0

1

R

1

8

1

9

1

k

0

7

k

2

5

R

2

6

C

N

k

3

0

R

3

1

k

k

0

0

1

0

3

R

8

3

9
k

.

6

k

1

1

N

T

C

4

2

7

5

5

k

T

7

1

0

k

k

=

ß

3

3

2

0

3

R

5

4

5

3

6

.

9

C

1

F

µ

1

R

1

1

5

7

2

5

2

4

2

3

2

2

2

1

2

0

R

2

0

k

0

1

1

8

1

6

1

0

1

1

2

R

7

C

N

R

3

2

C

N

1

2

1

3

1

4
8

R

4

0

k

0

1

A

8

0

1

7

1

5

1

9

k

RT8166B

R

T

8

1

6

6

B

V

C

C

V

C

L

K

V

O

D

I

A

L

E

R

T

V

R

A

_

R

V

R

_

R

E

V

R

H

O

T

O

C

S

E

T

O

C

S

E

T

S

N

I

T

E

S

T

E

N

I

T

M

P

M

C

C

I

M

A

I

C

C

M

A

G

F

X

P

S

T

S

E

N

A

T

S

E

N

A

B

S

I

I

T

O

N

E

S

U

G

A

T

E

B

O

O

T

P

H

A

S

E

L

G

A

T

E

E

A

D

Y

P

V

A

D

Y

A

A

I
I

X

A

X
X

A

2

C

S

E

I

N

1

S

E

I

N

1
F

O

M

C
R

G

N

T

O

N

S

T

E

U

G

A

T

E

B

O

O

T

P

H

S

A

E

L

G

A

T

E

S

E

I

N

A

S

I

E

N

A

F

B

M

P

O

C

R

G

N

D

G

N

R

2

k

0

3

1

2

T

R

0

4

4

0

1

0

R

5

1

1

3

9

1

R

1

2

3

1

3

C

3

P

4

N

6

B

5

P

7

D

3

A

3

A

3

A

3

A

3

A

3

P

2

N

2

A

2

A

2

A

4

D

0

8

7

t

i

o

p

O

0

1

C

2

R

1

7

R

3

3

0

3

1

1

0

R

3

5

4

0

R

3

6

3

5

R

4

1

0

6

0
9

t

i

o

p

O

7

8
6

1

9

1

C

8

4

R

k

2

4

E

x

(

p

o

s

e

R

3

5

.

1

2

C

F

µ

.

1

0

Q

1

C

4

F

µ

.

1

0

Q

2

V

5

C

8

F

µ

1

l

a

n

1

k

k

l

a

n

d

P

l

a

n

i

o

t

O

p

1

1

C

2

2

R

k

0

1

R

3

4

.

1

5

2

1

C

F

µ

.

1

0

Q

3

C

1

3

F

µ

.

1

0

Q

4

l

a

n

t

O

i

o

p

0

2

C

9

4

R

k

0

1

d

)

a

C

0

1

t

n

i

o

p

a

O

R

1

3

C

7

3

2

R

0

0

1

C

0

1

a

n

t

i

p

O

o

R

4

2

C

1

5

0

5

R

0

0

1

3

F

µ

R

C

D

l

1

R

1

4

3

k

.

9

9

C

O

8

2

R

0

0

1

1

4

F

µ

R

C

D

2

l

R

4

3

k

1

1

8

1

C

1

5

R

0

0

1

V

N

I

5

o

t

V

2

5

V

7

.

m

6

=

L

1

H

µ

C

6

F

µ

0

8

6

.

0

R

R

.

2

a

i

n

o

t

p

R

O

C

V

CORE

1

1

6

4

.

7

k

4

l

E

S

V

E

C

C

CORE VSS SENSE

V

N

I

5

o

t

V

2

5

V

m

.

6

4

1

=
L

2

H

µ

C

1

6

F

µ

1

.

0

R

4
R
1

O

p

t

F

G

V

G

F

G

4

4

5

k

1

k

.

2

l

a

n

i

o

N

E

S

V

X

C

C

F

X

N

E

S

X

V

S

S

V

C

R

O

E

C

2

C

5

F

µ

0

3

3

m

/

9

N

T

C

5

k

4

.

7

k

=

3

ß

E

S

N

V

F

G

X

7

C

1

F

µ

0

3

3

m

5

/

1

N

T

C

A

k

1

5

6

3

ß

=

E

S

E

S

6

F

3

µ

0

3

m

/

9

1

0

0

5

C

2

7

F

µ

0

3

3

m

5

/

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

4

©

DS8166B-03 November 2013www.richtek.com

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

DS8166B-03 November 2013 www.richtek.com

©

5

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

6

©

DS8166B-03 November 2013www.richtek.com

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

DS8166B-03 November 2013 www.richtek.com

©

7

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

8

©

DS8166B-03 November 2013www.richtek.com

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

DS8166B-03 November 2013 www.richtek.com

©

9

RT8166B

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

10

©

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

DS8166B-03 November 2013 www.richtek.com

©

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 1F.

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

Copyright 2013 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation.

12

©

DS8166B-03 November 2013www.richtek.com