Winbond
Bus Termination Regulator
W83310DS-A/W83310DG-A
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- I - Revision 0.5
W83310DS-A/W83310DG-A
Datasheet Revision History
PAGES DATES VERSION VERSION
ON WEB MAIN CONTENTS
1 1/17/2006 0.5 N.A. First released
2
3
4
5
6
7
8
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.
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- II - Revision 0.5
Table of Contents-
1. GENERAL DESCRIPTION ......................................................................................................... 1
2. FEATURES ................................................................................................................................. 1
3. APPLICATIONS .......................................................................................................................... 1
4. PIN CONFIGURATION AND DESCRIPTION ............................................................................ 2
5. APPLICATION CIRCUIT............................................................................................................. 3
6. INTERNAL BLOCK DIAGRAM ................................................................................................... 4
7. ELECTRICAL CHARACTERISTICS........................................................................................... 5
7.1 AC CHARACTERISTICS................................................................................................ 5
8. 8. TYPICAL OPERATING WAVEFORM..................................................................................... 6
9. PACKAGE DIMENSION ........................................................................................................... 10
10. THERMAL PERFORMANCE.................................................................................................... 11
11. ORDERING INFORMATION .................................................................................................... 11
12. HOW TO READ THE TOP MARKING...................................................................................... 11
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 1 - Revision 0.5
1. GENERAL DESCRIPTION
The W83310DS-A/W83310DG-A is a linear regulator provides a power achieves continuous 2.0Amp
bi-directional sinking and driving capability for a high speed bus terminator application. The chip
simply implements a stable power supply which tracks half of input power dynamically for bus
terminator with a single chip. The W83310DS-A/W83310DG-A is promoted with small footprint 8-SOP
150mil power package. With W83310DS-A/W83310DG-A design, a high integration, high
performance, and cost-effective solution are promoted.
2. FEATURES
y Regulates a bi-directional power with driving and sinking capability
y Provides achieve continuous 2.0Amp driving and sinking current
y Power MOSFET integrated
y Low external component count
y Low output voltage offset
y VCNTL Operates with +3.3V & 2.5 V power
y 8-SOP 90mil small power package
y Low cost and easy to use
3. APPLICATIONS
y DDR/DDRII Bus Termination Regulator
y Active Termination Bus
y Intel® Springdale GMCH-VTT Support
y SSTL-2
y SSTL-3
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 2 - Revision 0.5
4. PIN CONFIGURATION AND DESCRIPTION
- W83310DS-A/W83310DG-A
SYMBOL PIN FUNCTION
VIN 1 Main power input pin.
GND 2 Power ground.
VREF 3
Internal reference voltage source.
Reference voltage on the pin will be referred with the value
of pin
VOUT 4 Voltage output pin.
NC 5
VCNTL 6 Power for internal control logic use
NC 7
NC 8
V
IN
GND
VREF
VOUT
NC
NC
VCNTL
NC
1
2
3
4
8
7
6
5
inbond
W83310DS-A/
W83310DG-A
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 3 - Revision 0.5
5. APPLICATION CIRCUIT
- W83310DS-A/W83310DG-A for DDR SDRAM Application
C2
10u
C1
1000u
R1
1K
VRAM U1
W83310DS-
A
1
2
3
4 5
6
7
8
VI N
GND
VREF
VOUT NC
VCTRL
2.5VREF
C5
0.1U
R2
1K
C4
1500u
3VDUAL
DDRVTT
C3
1u
NC
NC
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 4 - Revision 0.5
6. INTERNAL BLOCK DIAGRAM
VCTRL VIN
VREF
GND
VOUT
Control
Logic
Circuit
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 5 - Revision 0.5
7. ELECTRICAL CHARACTERISTICS
7.1 AC CHARACTERISTICS
Cout=1000uF, TA = 0
°
C to +70
°
C
PARAMETER SYMBOL MIN TYP MAX UNITS TEST
CONDITIONS
Output Offset Voltage Vos -5 0 +5 mV Iout=0A
0.8 Loading: 0AÆ2.0A
Load Regulation 0.8 % Loading: 0AÆ-
2.0A
VIN 1.62 3.63
Input Voltage Range VCNTL 3.3 3.63 V
Operating Current of
VCNTL ICNTL 0.5 1 mA No Load(Iout=0A)
Short Current Limit ILMT 4.0 A
Note: Load regulation is tested by using a 1ms current pulse and VOUT measuring.
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 6 - Revision 0.5
8. TYPICAL OPERATING WAVEFORM
Load regulation with test condition - VCTRL=3.3V; VIN=2.5V; VOUT=1.225V; 2.0Amp pulse driving
current.
Load regulation with test condition - VCTRL=3.3V; VIN=2.5V; VOUT=1.225V; 2.0Amp pulse sinking
current.
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 7 - Revision 0.5
Load regulation with test condition - VCTRL=3.3V; VIN=2.5V; VOUT=1.45V; 2.0Amp pulse driving current.
Load regulation with test condition - VCTRL=3.3V; VIN=2.5V; VOUT=1.45V; 2.0Amp pulse sinking
current.
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 8 - Revision 0.5
Load regulation with test condition - VCTRL=3.3V; VIN=2.5V; VOUT=1.25V; 2.0Amp pulse driving current.
Load regulation with test condition - VCTRL=3.3V; VIN=2.5V; VOUT=1.25V; 2.0Amp pulse sinking
current.
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 9 - Revision 0.5
Short Current Limit
- VCTRL = 3.3V
- VCTRL = 3.6V
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 10 - Revision 0.5
9. PACKAGE DIMENSION
8L Power SOP 150mil
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 11 - Revision 0.5
10. THERMAL PERFORMANCE
TEST ON FOUR-LAYER (2S2P) JEDEC TEST BOARD
COMPONENT TEMP. (OC)
PACKAGE POWER
(W) PACKAGE DIE DOWNSET LEAD AMBIENT
Θ JC
(OC /W)
PSOP-8 3.05 100 145 79 78 25 14.7
An area of 190mil*150mil on the top layer is use as a thermal pad for W83310DS and this is con-
nected to the bottom layer by vias. The Θja of the W83310DS mounted on this demo board is ab-
out 39 oC /W.Assuming the TA=25 oC and TJ=160 oC,the maximum power dissipation is calculated
as: PD(max)=(160-25)/39=3.46W
11. ORDERING INFORMATION
PART NUMBER PACKAGE TYPE PRODUCTION FLOW
W83310DS-A Power SOP-8
W83310DG-A Power SOP-8
12. HOW TO READ THE TOP MARKING
Left line: Winbond logo
1st & 2nd line: W83310DS-A/W83310DG-A – the part number
3rd line: Tracking code 318 G A
318: packages assembled in Year 03’, week 18
G: assembly house ID; O means OSE, G means GR, etc.
A: the IC version
W83
310DG-A
249GA
W83
310DS-A
249GA
W83310DS-A/W83310DG-A
Publication Date: January 17, 2006
- 12 - Revision 0.5
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.
