The HIP6021 provides the power control and protection for four output voltages in high-performance, graphics intensive microprocessor and computer applications. The IC integrates a voltage-mode PWM controller and three linear controllers, as well as the monitoring and protection functions into a 28- pin SOIC package. The PWM controller regulates the microprocessor core voltage with a synchronous-rectified buck converter. The linear controllers regulate the computer system's AGP 1.5V or 3.3V bus power, the 1.5V GTL bus power, and the 1.8V power for the North/South Bridge core voltage and/or cache memory circuits. The HIP6021 includes an Intel-compatible, TTL 5-input digital-to-analog converter (DAC) that adjusts the core PWM output voltage from 1.3VDC to 2.05VDC in 0.05V steps and from 2.1VDC to 3.5VDC in 0.1V increments. The precision reference and voltage-mode control provide ±1% static regulation. The AGP bus power linear controller's output (VOUT2) is user-selectable, through a TTL-compatible signal applied at the SELECT pin, for levels of 1.5V or 3.3V with ±3% accuracy. Based on the status of the FIX pin, the other two linear regulators provide either fixed output voltages of 1.5V±3% (VOUT3) and 1.8V±3% (VOUT4), or user-adjustable by means of an external resistor divider. All linear controllers can employ either N-channel MOSFETs or bipolar NPNs for the pass transistor.
The HIP6021 monitors all the output voltages. A single Power Good signal is issued when the core is within ±10% of the DAC setting and all other outputs are above their undervoltage 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 over-current function monitors the output current by using the voltage drop across the upper MOSFET's rDS(ON).
Key Features
- Provides 4 Regulated Voltages
- Microprocessor Core, AGP Bus, Memory, and GTL Bus Power
- Drives N-Channel MOSFETs
- Linear Regulator Drives Compatible with both MOSFET and Bipolar Series Pass Transistors
- Fixed or Externally Resistor-Adjustable Linear Outputs (FIX Pin)
- Simple Single-Loop Control Design
- Fast PWM Converter Transient Response
- High-Bandwidth Error Amplifier
- Full 0% to 100% Duty Ratio
- Excellent Output Voltage Regulation
- Core PWM Output: ±1% Over Temperature
- Other Outputs: ±3% Over Temperature
- TTL-Compatible 5-Bit DAC Microprocessor Core Output Voltage Selection
- Wide Range 1.3VDC to 3.5VDC
- Power-Good Output Voltage Monitor
- Over-Voltage and Over-Current Fault Monitors
- Switching Regulator 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 Over 1MHz
- Small External Component Count
- Pb-Free Available (RoHS Compliant)
Order InformationPart Number | Package Type | Weight(g) | Pins | MSL Rating | Peak Temp (°C) | RoHS Status |
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HIP6021CB | 28 Ld SOIC | 0.75 | 28 | 2 | 240 | |
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HIP6021CB-T | 28 Ld SOIC T+R | 0.75 | 28 | 2 | 240 | |
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HIP6021CBZ | 28 Ld SOIC | 0.75 | 28 | 3 | 260 | RoHS |
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HIP6021CBZ-T | 28 Ld SOIC T+R | 0.75 | 28 | 3 | 260 | RoHS |
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HIP6021CBZA | 28 Ld SOIC | 0.75 | 28 | 3 | 260 | RoHS |
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HIP6021CBZA-T | 28 Ld SOIC T+R | 0.75 | 28 | 3 | 260 | RoHS |
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HIP6021EVAL1 | | | | N/A | | |
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