|Category||Power Management => Desktop|
|Description||Microprocessor Core Voltage Regulator Multi-phase Buck PWM Controller|
|Datasheet||Download HIP6311ACB datasheet
Microprocessor CORE Voltage Regulator Multi-Phase Buck PWM Controller
The HIP6311A Multi-Phase Buck PWM control IC together with or HIP6603A companion gate drivers form a precision voltage regulation system for advanced microprocessors. The HIP6311A controls microprocessor core voltage regulation by driving to 4 synchronous-rectified buck channels in parallel. The multiphase buck topology takes advantage of interleaving phases to increase ripple frequency and reduce input and output ripple currents. Resulting in fewer components, reduced component ratings, lower power dissipation, and smaller implementation area. The HIP6311A control IC features a 5 bit digital-to-analog converter (DAC) that adjusts the core output voltage from to 1.850V with an unsurpassed system accuracy of ±0.5% over temperature. The HIP6311A uses a lossless current sensing approach in which the voltage developed across the on-resistance of the lower MOSFETs during conduction is sampled. Current sensing provides the required signals for precision droop, channel-current balancing, load sharing, and over-current protection. Another feature of this control IC is the PGOOD monitor which is held low until the core voltage increases to within 8% of the programmed voltage. An over-voltage condition is detected when the output voltage exceeds 115% of the programmed VID. This results in the converter shutting down and PGOOD being pulled low. During an under-voltage condition (output voltage 10% below the programmed VID), PGOOD transitions low, but the converter continues to operate.Features
Precision CORE Voltage Regulation - ±0.5% System Accuracy Over Temperature Microprocessor Voltage Identification Input - 5-Bit VID Input in 25mV Steps - Programmable Droop Voltage RDS(on) Current Sensing - Accurate Channel Current Balancing - Loss less Current Sampling - Low-Cost Implementation Fast Transient Response Digital Soft Start Over Current Protection Selection or 4 Phase Operation to 1.5MHz Switching FrequencyApplications
Desktop Motherboards Voltage Regulator Modules Servers and Workstations
PART NUMBER HIP6311ACB-T HIP6301EVAL1 TEMP. (oC) to 70 PACKAGE 20 Ld SOIC PKG. NO. M20.3
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 321-724-7143 | Intersil and Design is a trademark of Intersil Americas Inc. Copyright © Intersil Americas Inc. 2001, All Rights ReservedPOWER-ON RESET (POR) VSEN + UV THREE STATE OV LATCH S + OVP X1.15
converter. Pulling this pin to ground disables the converter and three states the PWM outputs. See Figure 10.Bias and reference ground. All signals are referenced to this pin.
Power good monitor input. Connect to the microprocessorCORE voltage.
PWM outputs for each driven channel in use. Connect these pins to the PWM input a HIP6601/2/3 driver. For systems which use 3 channels, connect PWM4 high. Two channel systems connect PWM3 and PWM4 high.
Voltage Identification inputs from microprocessor. These pins respond to TTL and 3.3V logic signals. The HIP6311A decodes VID bits to establish the output voltage. See Table 1.
Current sense inputs from the individual converter channel's phase nodes. Unused sense lines MUST be left open.
Output of the internal error amplifier. Connect this pin to the external feedback and compensation network.
Power good. This pin provides a logic-high signal when the microprocessor CORE voltage (VSEN pin) is within specified limits and Soft-Start has timed out.
Channel frequency, FSW, select and disable. A resistor from this pin to ground sets the switching frequency of the
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