IPM6210A
Precision Dual PWM Controller And Linear Regulator for Notebook CPUs
Typical Diagram
Key Features
- Provides 3 Regulated Voltages
- 0.9V to 2.0V Microprocessor Core (SpeedStepTM Enabled)
- 1.5V Microprocessor I/O
- 2.5V Microprocessor Clock Generator
- High Efficiency Over Wide Load Range
- Not Dissipative Current-Sense Scheme
- Uses MOSFET's rDS(ON)
- Optional Current-Sense Resistor for Precision Overcurrent
- Adaptive Dead-Time Drivers for N-Channel MOSFETs
- Operates from +5V, +3.3V and Battery (5.6-24V) Inputs
- Precision Core Voltage Control:
- Remote "Kelvin" Sensing
- Summing Current-Mode Control
- On-Chip Mode-Compensated "Droop" for Optimum Transient Response and Lower Processor Power Dissipation
- TTL-Compatible 5-Bit Digital Output Voltage Selection
- Wide Range - 0.925VDC to 1.3VDC in 25mV Steps, and from 1.3VDC to 2.0VDC in 50mV Steps
- Programmable "On-the-Fly" VID Code Change with Customer Programmable Slew Rate and 100µs Settling Time
- Power-Good Output Voltage Monitor
- No Negative Voltage on Outputs at Turn-Off
- Overvoltage, Undervoltage and Overcurrent Fault Monitors
- 300kHz Fixed Switching Frequency
- Thermal Shutdown
Description
The IPM6210A is a highly integrated power controller which provides a complete power management solution for mobile CPUs. The IC integrates two PWM controllers and a linear regulator as well as monitoring and protection circuitry into a single 28-lead plastic SSOP package. The two PWM controllers regulate the microprocessor core and I/O voltages with synchronous-rectified buck converters, while the linear regulator powers the CPU clock.
The IPM6210A includes 5-bit digital-to-analog converter (DAC) that adjusts the core PWM output voltage from 0.925VDC to 2.0VDC and conforms to the Intel Mobile VID specification. The DAC setting may be changed during operation to accommodate Dual-Mode processors. Special measures are taken to provide such a transition with controlled rate in a specified 100µs. A precision reference, remote sensing, and a proprietary architecture with integrated processor mode-compensated "droop" provide excellent static and dynamic core voltage regulation. The second PWM controller has a fixed 1.5V output voltage and powers the I/O circuitry. Both PWM controllers have integrated feedback loop compensation that dramatically reduces number of the external components. At nominal loads PWM controllers operate at a fixed frequency of 300kHz. At light loads when the filter inductor current becomes discontinuous, controllers operate in a hysteretic mode. Out-of-phase operation of two PWM controllers to reduce input current ripple is provide in both modes of operation. The linear regulator uses an internal pass device to provide 2.5V for the CPU clock generator.
The IPM6210A monitors all the output voltages. A single Power-Good signal is issued when soft start is completed and all outputs are within ±10% of their respective set points. A built-in overvoltage protection for the core and I/O outputs forces the lower MOSFETs on to prevent output voltages from going above 115% of their settings. Undervoltage protection latches the chip off when any of three outputs drops below 75% of the set value. The PWM controller's overcurrent circuitry monitors the output current by sensing the voltage drop across the lower MOSFETs. If precision overcurrent protection is required, an external current-sense resistor may optionally be used.
Applications
- Mobile PCs
- Web Tablets
- Internet Appliances
