W83301R Datasheet, PDF (3/16 Pages) Winbond – ACPI-STR Controller

W83301R
Preliminary
1. General Description
The W83301R is an ACPI-compliant controller for microprocessor and other
computer applications. In substance, the part can mainly operate in alternative
configurations mode A and B – mode A provides a switch controller to generate a 5V_DL
voltage from ATX power supply, a linear controller – STR1 (2.5V_DUAL), and a bus
termination controller – 1.25 V_DUAL for high speed bus such as RDRAM/DDRAM
current sinking and sourcing; and mode B provides a switch controller to generate a
5V_DL voltage from ATX power supply and three linear controllers for specific voltage
regulations – that is STR1 (2.5V_DUAL), STR2 (3.3V_DUAL) and STR3 (1.8 V_DUAL), all of the
outputs can simply configured by V_SET0, V_SET1. Besides, the W83301R also can
provide extra voltage up to 0.2V in each regulator output for more performance. In
order to reduce the customer’s cost, and simplify the circuit design, the W83301R
integrates a charge-pump engine into the chip to provide higher driving voltage for
single N-channel MOSFETs, that is the W83301R, can drive only N-channel
MOSFETs for all applications. In the other hand, the W83301R also offer PWOK and
over current detection to protect each output and soft-start protects all linear
controllers from rush current attack. The W83301R is available in a 20-pin SOP
package.
2.Features
Provides alternative configurations for flexible applications
Mode A
Provide a switch controller to generate 5V_DUAL
Linear controller STR1–2.5V_DUAL (RDRAM/DDRAM application)
Bus termination controller –1.25V_DUAL for high speed bus termination
application to sinking and sourcing redundant current
Mode B
Provide a switch controller to generate 5V_DUAL
Linear controller STR1 – 2.5V_DUAL (Clock Gen. Application)
Linear controller STR2 – 3.3 V_DUAL (SDRAM Application)
Linear controller STR3 – 1.8V_DUAL (Chipset Application)
Provide a switch to enable/disable 5V_DL output in S5 state via 5V_DLEN pin for USB
application
Supports SDRAM/RDRAM/DDRAM ACPI-STR Functions
Drives all N-Channel MOSFETs
Power-Up Softstart for all controllers
Up to 0.2V incremental voltage on STR1/STR2 for over-clock application.
Under-Voltage Fault Monitor
Soft-Start function
20-Pin SOP Package
Confidential
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Revision 0.6