Winbond
ACPI-STR Controller
W83305S
W83305G
W83305S/W83305G
Publication Release Date: April, 2006
- I - Revision 0.5
W83305S
Data Sheet Revision History
PAGES DATES VERSION VERSION
ON WEB MAIN CONTENTS
1 Apr./06 0.5 N.A. All version before 0.5 are for internal use only
Please note that all data and specifications are subject to change without notice. All the trademarks of
products and companies mentioned in this datasheet belong to their respective owners.
LIFE SUPPORT APPLICATIONS
These products are not designed for use in life support appliances, devices, or systems where
malfunction of these products can reasonably be expected to result in personal injury. Winbond
customers using or selling these products for use in such applications do so at their own risk and
agree to fully indemnify Winbond for any damages resulting from such improper use or sales.
W83305S/W83305G
- II -
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 1
2. FEATURES ................................................................................................................................. 1
3. PIN CONFIGURATION............................................................................................................... 1
4. PIN DESCRIPTION..................................................................................................................... 2
5. REGISTER DESCRIPTION ........................................................................................................ 3
5.1 CR01 (VAGP Over-clocking Configuration Register, Default 0x00h, Read/Write) ........ 3
5.2 CR02 (VRAM Over-clocking Configuration Register, Default 0x00h, Read/Write) ........ 3
5.3 Index 4Ch - Winbond Vendor ID (Low Byte) .................................................................. 4
5.4 Index 4Dh - Winbond Vendor ID (High Byte) ................................................................. 4
5.5 Chip ID -- Index 4Eh ....................................................................................................... 4
5.6 Reversion ID -- Index 4Fh............................................................................................... 4
6. APPLICATION CIRCUIT............................................................................................................. 5
7. INTERNAL BLOCK DIAGRAM ................................................................................................... 5
8. ELECTRICAL CHARACTERISTICS........................................................................................... 6
9. PACKAGE SPECIFICATION ...................................................................................................... 7
10. ORDERING INFORMATION ...................................................................................................... 8
11. HOW TO READ THE TOP MARKING........................................................................................ 8
W83305S/W83305G
Publication Release Date: April, 2006
- 1 - Revision 0.5
1. GENERAL DESCRIPTION
W83305S is a new power management IC which compliant ACPI specification 2.0 for desktop PC and
motherboard. The chip regulates two most voltage-relative powers for DDR SDRAM and AGP slot
applications. As the two devices on board, a stable, reliable, and programmable power should be
performed for higher reliability, stability, compatibility and better-performance for diverse combination
of devices (RAM module and AGP card). The chip is operated basing on a simple dual-wire bus
SMBus. Via SMBus control, the power for DDR SDRAM can be adjusted ranging from 2.50V to 3.00V;
and the power for AGP slot can be adjusted ranging from 1.50V to 2.00V with 50mV/step. Besides for
safety consideration, linear under voltage and soft-start are applied on the two regulated powers. With
design of W83305S, a cost-effective, sample, modular, stable, reliable, flexible and high-
performance power solution is provides for the motherboard and desktop PC design.
2. FEATURES
y Provides ACPI-Compliant Voltages
- Programmable 2.55VSTR Power for DDR SDRAM
- Programmable 1.55VCC Power for AGP Slot
y I2C Interface
y Internal Charge Pump Support Voltage Up to 9.5V
y Drive All N-Channel MOSFET
y Soft Start
y Under-Voltage Protection for VAGP, VRAM
y Small footprint package 14-SOP 150mil
3. PIN CONFIGURATION
S4# S3#
1
14
SDA VAGP_SEN
2
13
SCL VAGP_DRV
3
12
SS 5VSB
4
11
VCC5 CHARPMP
5
10
VRAM_SEN CIN
6
9
VRAM_DRV GND
7
8
inbond
W83305S
W83305S/W83305G
- 2 -
4. PIN DESCRIPTION
NO NAME I/O FUNCTION DESCRIPTION
1 S4# IST ACPI control signal.
2 SDA I/O
3 SCL I
I2C Interface Pins. The address is defined as 5EH (0101 111X), and X
is used to control read/write.
4 SS I
Soft-Start Pin. Attach an external capacitor (0.1u) on this pin to adjust
the soft-start slope-rate.
5 VCC5 IST Power VCC5 Input.
6 VRAM_SEN I
7 VRAM_DRV O
Linear Regulator for DDR SDRAM.
8 GND P Power Ground.
9 CIN I
10 CHRPMP P
Charge Pump Pins. It supports 5mA driving current and insures output
voltage 10V or above.
11 5VSB P Power Pin.
12 VAGP_DRV O
13 VAGP_SEN I
Linear Regulator for AGP slot.
14 S3# IST ACPI Control Signal.
W83305S/W83305G
Publication Release Date: April, 2006
- 3 - Revision 0.5
5. REGISTER DESCRIPTION
5.1 CR01 (VAGP Over-clocking Configuration Register, Default 0x00h,
Read/Write)
BIT0 BIT1 BIT2 VAGP OUTPUT (V)
0 0 0 1.55
0 0 1 1.50
0 1 0 1.60
0 1 1 1.65
1 0 0 1.70
1 0 1 1.80
1 1 0 1.90
1 1 1 2.00
5.2 CR02 (VRAM Over-clocking Configuration Register, Default 0x00h,
Read/Write)
BIT0 BIT1 BIT2 VRAM OUTPUT (V)
0 0 0 2.55
0 0 1 2.50
0 1 0 2.60
0 1 1 2.65
1 0 0 2.70
1 0 1 2.80
1 1 0 2.90
1 1 1 3.00
CR03 (Linear Under Voltage Enable/Disable Register, Default 0x03h, Read/Write)
Bit1: Linear under voltage protection enable/disable bit for VAGP
0: Disable 1: Enable
Bit0: Linear under voltage protection enable/disable bit for VRAM
0: disable 1: Enable
W83305S/W83305G
- 4 -
5.3 Index 4Ch - Winbond Vendor ID (Low Byte)
Power-on default [7:0] = 1010, 0011 b (A3h)
BIT NAME READ/WRITE DESCRIPTION
7:0 VIDL[7:0] Read Only Vendor ID Low Byte. Default A3h.
5.4 Index 4Dh - Winbond Vendor ID (High Byte)
Power-on default [7:0] = 0101, 1100 b (5Ch)
BIT NAME READ/WRITE DESCRIPTION
7:0 VIDH[7:0] Read Only Vendor ID High Byte. Default 5Ch
5.5 Chip ID -- Index 4Eh
Power on default [7:0] = 1010, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0 CHIPID[7:0] Read Only Winbond Chip ID number. Read this register will
return 0xa0h for W83305S.
5.6 Reversion ID -- Index 4Fh
Power on default [7:0] = 0000, 0000 b
BIT NAME READ/WRITE DESCRIPTION
7-0 CHIPID[7:0] Read Only Winbond Chip ID number. Read this register will
return 0x00h for W83305S.
W83305S/W83305G
Publication Release Date: April, 2006
- 5 - Revision 0.5
6. APPLICATION CIRCUIT
VAGP
C2
0.1U
C5
2000U
C7
0.1U
5VSB
S3#
VCC3
VCC5
C9
1U
3VDUAL/3VSTR Support S3 State
VRAM
VCC3 Only Support S0 State
C8
0.1U
SCL
3VDUAL/3VSTR/VCC3 U1
W83305R
1
2
3
4
5
6
7 8
9
10
11
12
13
14
S4#
SDA
SCL
SS
VCC5
VRAM_SEN
VRAM_DRV GND
CIN
CHARPMP
5VSB
VAGP_DRV
VAGP_SEN
S3#
C3
0.1U
SDA
C1
100U
S4#
C6
4000U
D1
BAT54S/SOT
1
3
2
Q2
NMOS
3
1
2
5VSBR1
5
Q1
NMOS
3
1
2
C4
0.1U
7. INTERNAL BLOCK DIAGRAM
5VSB CIN ChrPm
p
S3#
S4#
SS
VRAM
_
DRV
VRAM
_
SEN
Monitor
and
Control
Char
g
e Pum
p
To Power
MOS
drivers
1.2 V
GND
I2C
Interface
ACPI
Control
Signal
SCL
SD
A
VAGP
_
DRV
VAGP
_
SEN
VCC5
W83305S/W83305G
- 6 -
8. ELECTRICAL CHARACTERISTICS
AC Characteristics
VCC=5V ± 5 %, TA = 0°C TO +70°C
PARAMETER SYMBOL MIN TYP MAX UNITS TEST CONDITIONS
VAGP REGULATOR 0
Nominal Output Voltage 1.55 V CR01(bit0,bit1,bit2)=000
Nominal Output Voltage 1.50 V CR01(bit0,bit1,bit2)=001
Nominal Output Voltage 1.60 V CR01(bit0,bit1,bit2)=010
Nominal Output Voltage 1.65 V CR01(bit0,bit1,bit2)=011
Nominal Output Voltage 1.70 V CR01(bit0,bit1,bit2)=100
Nominal Output Voltage 1.80 V CR01(bit0,bit1,bit2)=101
Nominal Output Voltage 1.90 V CR01(bit0,bit1,bit2)=110
Nominal Output Voltage 2.00 V CR01(bit0,bit1,bit2)=111
Regulation 5 %
Under-Voltage Falling
Threshold
73.3
%
%
VAGP_DRV Output
Voltage
8 V CR0F=80h
I(VAGP_DRV) < 0.1mA
VRAM2.5 REGULATOR
Nominal Output Voltage 2.55 V CR02(bit0,bit1,bit2)=000
Nominal Output Voltage 2.50 V CR02(bit0,bit1,bit2)=001
Nominal Output Voltage 2.60 V CR02(bit0,bit1,bit2)=010
Nominal Output Voltage 2.65 V CR02(bit0,bit1,bit2)=011
Nominal Output Voltage 2.70 V CR02(bit0,bit1,bit2)=100
Nominal Output Voltage 2.80 V CR02(bit0,bit1,bit2)=101
Nominal Output Voltage 2.90 V CR02(bit0,bit1,bit2)=110
Nominal Output Voltage 3.00 V CR02(bit0,bit1,bit2)=111
Regulation 5 %
Under-Voltage Falling
Threshold
76% %
MAX VRAM_2.5_DRV
Output Voltage
8 V I(VRAM_2.5_DRV) <
0.1mA
CHARGE PUMP
Charge Pump Frequency 160 200 240 KHz
Charge Pump Voltage 9.2 9.5
LOGIC LEVEL HIGH LOW
S3 2.55±0.3V 2.55±0.3V
S4 2.55±0.3V 2.55±0.3V
W83305S/W83305G
Publication Release Date: April, 2006
- 7 - Revision 0.5
9. PACKAGE SPECIFICATION
SEATING PLANE
L
O
c
0.25
GAUGE PLANE
Control demensions are in milmeters .
4.00
0.25
0.51
0.25
E
c
b
A1
3.80
0.19
0.33
0.10
0.157
0.010
0.020
0.010
0.150
0.008
0.013
0.004
MAX.
DIMENSION IN MM
1.75
A
SYMBOL MIN.
1.35
DIMENSION IN INCH
0.069
MIN.
0.053
MAX.
1.27
0.10
6.20
L
θ
Y
H
08
0.40
5.80
e1.27 BSC
0.050
0.004
0.244
0
0.016
0.228
8
0.050 BSC
E
D8.55 8.75 0.337 0.344
EH
E
1
14 8
7
A1
A
e
b
D
Y
W83305S/W83305G
- 8 -
10. ORDERING INFORMATION
PART NO. PACKAGE REMARKS
W83305S 14-SSOP Operation - Commercial 0~70℃
W83305G 14 SSOP Operation - Commercial 0~70℃
PB-free package
11. HOW TO READ THE TOP MARKING
W83305S
1135968D-M
539G
W83305G
1135968D-M
539G
Left Line: Winbond Logo
1st Line: IC Part No - W83305S,W83305G(Pb-free package)
2nd Line: IC Lot No – XXXXXXXX
3rd Line: Assembly Date (X: Assembly Year + XX: Assembly Week) + Assembly House Code
(G- GR; O- OSE; A- ASE, etc…) + IC Version (X)
W83305S/W83305G
Publication Release Date: April, 2006
- 9 - Revision 0.5
Please note that all data and specifications are subject to change without notice. All the trade
marks of products and companies mentioned in this data sheet belong to their respective
owners.
Important Notice
Winbond products are not designed, intended, authorized or warranted for use as components
in systems or equipment intended for surgical implantation, atomic energy control
instruments, airplane or spaceship instruments, transportation instruments, traffic signal
instruments, combustion control instruments, or for other applications intended to support or
sustain life. Further more, Winbond products are not intended for applications wherein failure
of Winbond products could result or lead to a situation wherein personal injury, death or
severe property or environmental damage could occur.
Winbond customers using or selling these products for use in such applications do so at their
own risk and agree to fully indemnify Winbond for any damages resulting from such improper
use or sales.