HIP6019
Advanced Dual PWM and Dual Linear Power Control
Typical Diagram
Key Features
- Provides 4 Regulated Voltages
- Microprocessor Core, I/O, Clock Chip and GTL Bus
- Drives N-Channel MOSFETs
- Operates from +5V and +12V Inputs
- Simple Single-Loop Control Designs
- Voltage-Mode PWM Control
- Fast Transient Response
- High-Bandwidth Error Amplifiers
- Full 0% to 100% Duty Ratios
- Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- I/O PWM Output: ±2% Over Temperature
- Other Outputs: ±2.5% Over Temperature
- TTL-Compatible 5-Bit Digital-to-Analog Core Output Voltage Selection
- Wide Range 1.8VDC to 3.5VDC
- 0.1V Steps 2.1VDC to 3.5VDC
- 0.05V Steps 1.8VDC to 2.05VDC
- Power-Good Output Voltage Monitor
- Microprocessor Core Voltage Protection Against Shorted MOSFET
- Over-Voltage and Over-Current Fault Monitors
- Does Not Require Extra Current Sensing Element, Uses MOSFET's rDS(ON)
- Small Converter Size
- Constant Frequency Operation
- 200kHz Free-Running Oscillator; Programmable from 50kHz to 1MHz
Description
The HIP6019 provides the power control and protection for four output voltages in high-performance microprocessor and computer applications. The IC integrates two PWM controllers, a linear regulator and a linear controller as well as the monitoring and protection functions into a single 28 lead SOIC package. One PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter, while the second PWM controller supplies the computer's 3.3V power with a standard buck converter. The linear controller regulates power for the GTL bus and the linear regulator provides power for the clock driver circuits.
The HIP6019 includes an Intel-compatible, TTL 5-input digitalto- analog converter (DAC) that adjusts the core PWM output voltage from 2.1VDC to 3.5VDC in 0.1V increments and from 1.8VDC to 2.05VDC in 0.05V steps. The precision reference and voltage-mode control provide ±1% static regulation. The second PWM controller is user-adjustable for output levels between 3.0V and 3.5V with ±2% accuracy. The adjustable linear regulator uses an internal pass device to provide 2.5V ±2.5%. The adjustable linear controller drives an external NChannel MOSFET to provide 1.5V ±2.5%.
The HIP6019 monitors all the output voltages. A single Power Good signal is issued when the core is within ±10% of the DAC setting and the other levels are above their under- voltage levels. Additional built-in over-voltage protection for the core output uses the lower MOSFET to prevent output voltages above 115% of the DAC setting. The PWM controller's overcurrent functions monitor the output current by sensing the voltage drop across the upper MOSFET's rDS(ON), eliminating the need for a current sensing resistor.
Applications
- Full Motherboard Power Regulation for Computers
- Low-Voltage Distributed Power Supplies
