W83301DR Winbond Electronics Corp America, W83301DR Datasheet - Page 5

• Manufacturer Part Number: W83301DR
• Description: Description = Acpi-str Controller With DDR Bus Termination Regulator ;; Package = Tssop 24
• Manufacturer: Winbond Electronics Corp America

4. Pin Description
3V
Reserved
Reserved
Reserved
STR1
STR1
SYMBOL
5V
3V
ChrPmp
DRV
PWOK
3V
5V
BT
BT
BT
V
V
5V
S5#
S3#
Vss
C1
C2
SS
DLEN
SET3
SET2
SBSEN
DLSB
DLSB
SINK
/5V
DRV
SEN
SB
SEN
DRV
#
DRV
PIN
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
Pin Reserved
BT Current Source. Connect this pin to the gate of a suitable N-channel
MOSFET for driving bus termination regulator output.
BT Sense. Connect this pin to the bus termination regulator output.
BT Current Sink. This pin is used to drive a N-channel MOSFET to sink the
redundant current in the high-speed bus.
Function Reserved. Pull up this pin to +5VSB through a 1.5 Kohm resistor.
Power Ground. Connect this pin to ground.
Power 5V
Charge Pump Cap. Attach flying capacitor between this pin and C2 to
generate internally used high voltage from 5V power supply.
Charge Pump Cap. Attach flying capacitor between this pin and C1 to
generate internally used high voltage from 5V power supply.
Charge Pump output. This pin produces voltage doubled 5V supply by
charge pumping. Bypass with a 0.1uF capacitor.
5VDL Enable. Control 5V
Voltage Selection. Combine with VSET2 to select output voltages of STR
regulators.
Voltage Selection. Combine with VSET3 to select output voltages of STR
regulators.
S5 Signal. Control signal governing the soft off state S5. Pull-up internally.
S3 Signal. Control signal governing the soft off state S3. Pull-up internally.
3V
3V
driving STR1 output.
5VSB Output Control. Connect this pin to the gate of a N-MOSFET to output
5VSB power to 5V
3.3V/5V Output Control. Connect this pin to the gate of a N-MOSFET to
output 3.3V/5V power to 3.3V
Power OK. Open collector input/output. Used to indicate the ready of 5Vin
supply. If any STR supply occurs over current and induce under-voltage,
PWOK will be pull down.
Soft-Start. Attach a capacitor (0.033u) to this pin to determine the softstart
rate. A ramp generated by charging this capacitor with internal soft-start
current (18uA) is used to clamp the voltage rising slew rate of STR regulators
and 5V
STR1 Sense. Connect this pin to the STR1 output.
STR1 Drive. Connect this pin to the gate of a suitable N-channel MOSFET for
driving STR1 output.
Pin Reserved
DL
DL
Sense. Connect this pin to the STR1 output.
Drive. Connect this pin to the gate of a suitable N-channel MOSFET for
DL
. Soft starting avoids too much rush current during voltage setup.
SB
. Input 5V
DL
.
SB
supply.
DL
3
voltage output. Pull-up internally.
DL
/5V
FUNCTION
DL
.
Publication Release Date: Jul., 2002
W83301DR-O
Revision 1.0