The HIP6521 provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as monitoring and protection functions. The PWM controller is intended to regulate the microprocessor memory core voltage with a synchronous-rectified buck converter. The linear controllers are intended to regulate the computer system’s AGP 1.5V bus power, the 2.5V clock power, and the 1.8V power for the North/South Bridge core voltage and/or cache memory circuits. Both the switching regulator and linear voltage references provide ±2% of static regulation over line, load, and temperature ranges. All outputs are user-adjustable by means of an external resistor divider. All linear controllers employ bipolar NPNs for the pass transistors. The HIP6521 monitors all the output voltages. The PWM controller’s adjustable overcurrent function monitors the output current by using the voltage drop across the upper MOSFET’s rDS(ON). The linear regulator outputs are monitored via the FB pins for undervoltage events.
The HIP6521 integrates a voltage‑mode PWM controller and three linear regulators to provide four regulated output voltages for microprocessor and computer systems. The document describes its features, ordering information, and typical applications such as motherboard power regulation.
Technical sections cover absolute maximum ratings, operating conditions, electrical specifications, functional pin descriptions, soft‑start operation, over‑current protection, layout considerations, and application circuit examples. The datasheet also includes package dimensions for the SOIC‑16 form factor.
| Ambient Temperature Range | 0 °C to 70 °C |
|---|---|
| Maximum Junction Temperature (Plastic Package) | 150 °C |
| Free‑Running Oscillator Frequency | 275 kHz to 325 kHz |
| Reference Voltage (All Regulators) | 0.800 V |
| Output Voltage Regulation | ±2 % over temperature |
The HIP6521 provides four regulated output voltages.
The device operates from 0 °C to 70 °C ambient temperature.
The oscillator runs between 275 kHz and 325 kHz.