DATASHEET
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ISL62884C
Single-Phase PWM Regulator for IMVP-6™ Mobile CPUs
FN7591
Rev 0.00
Mar 16, 2010
The ISL62884C is a single-phase PWM buck regulator
for microprocessor core power supply. It uses an
integrated gate drivers to provide a complete solution.
The PWM modulator of ISL62884C is based on
Intersil's Robust Ripple Regulator (R3™) technology.
Compared with traditional modulators, the R3™
modulator commands variable switching frequency
during load transients, achieving faster transient
response. With the same modulator, the switching
frequency is reduced at light load, increasing the
regulator efficiency.
The ISL62884C is fully compliant with IMVP-6™
specifications. It responds to DPRSLPVR signals by
entering/exiting diode emulation mode. It reports the
regulator output current through the IMON pin. It
senses the current by using either discrete resistor or
inductor DCR whose variation over-temperature can be
thermally compensated by a single NTC thermistor. It
uses differential remote voltage sensing to accurately
regulate the processor die voltage. The adaptive body
diode conduction time reduction function minimizes the
body diode conduction loss in diode emulation mode.
User-selectable overshoot reduction function offers an
option to aggressively reduce the output capacitors as
well as the option to disable it for users concerned
about increased system thermal stress.
Features
• Precision Core Voltage Regulation
- 0.5% System Accuracy Over-Temperature
- Enhanced Load Line Accuracy
• Voltage Identification Input
- 7-Bit VID Input, 0V to 1.500V in 12.5mV Steps
- Supports VID Changes On-The-Fly
• Supports Multiple Current Sensing Methods
- Lossless Inductor DCR Current Sensing
- Precision Resistor Current Sensing
• Superior Noise Immunity and Transient Response
• Current Monitor
• Differential Remote Voltage Sensing
• High Efficiency Across Entire Load Range
• Integrated Gate Driver
• Adaptive Body Diode Conduction Time Reduction
• User-selectable Overshoot Reduction Function
• Small Footprint 28 Ld 4x4 TQFN Package
• Pb-Free (RoHS Compliant)
Applications*
• Notebook Core Voltage Regulator
• Notebook GPU Voltage Regulator
Related Literature*
• See AN1545 for Evaluation Board Application Note
“ISL62884CEVAL2Z Evaluation User Guide”
Load Line Regulation
0.91
0.90
0.89
0.88
0.87
0.86
0.85
0.84
0.83
0.82
0.81
0.80
0
VIN = 19V
VIN = 12V
VIN = 8V
2 4 6 8 10 12 14 16 18 20 22
IOUT (A)
FN7591 Rev 0.00
Mar 16, 2010
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