GENERAL DESCRIPTION
The ADP3161 is a highly efficient dual output synchronous buck switching regulator controller optimized for converting a 5 V or 12 V main supply into the core supply voltage required by high-performance processors such as Pentium® III. The ADP3161 uses an internal 4-bit DAC to read a voltage identification (VID) code directly from the processor, which is used to set the output voltage between 1.3 V and 2.05 V. The ADP3161 uses a current mode PWM architecture to drive two logic-level outputs at a programmable switching frequency that can be optimized for VRM size and efficiency. The output signals are 180 degrees out of phase, allowing for the construction of two complementary buck switching stages.
FEATURES
ADOPT™ Optimal Positioning Technology for Superior
Load Transient Response and Fewest Output
Capacitors
Active Current Balancing Between Both Output Phases
VRM 8.4-Compatible Digitally Programmable 1.3 V to
2.05 V Output
Dual Logic-Level PWM Outputs for Interface to External
High-Power Drivers
Total Output Accuracy ±0.8% Over Temperature
Current-Mode Operation
Short Circuit Protection
Power-Good Output
Overvoltage Protection Crowbar Protects
Microprocessors with No Additional
External Components
APPLICATIONS
Desktop PC Power Supplies for:
Intel Pentium® III Processors
VRM Modules