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Renesas Electronics Components Datasheet

ISL62881C Datasheet

Single-Phase PWM Regulator

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DATASHEET
ISL62881C, ISL62881D
Single-Phase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs
FN7596
Rev 0.00
March 8, 2010
The ISL62881C provides a complete solution for
microprocessor and graphic processor core power
supply with it’s integrated gate drive. Based on
Intersil’s Robust Ripple regulator (R3™) technology,
the PWM modulator compared to traditional
modulators, has faster transient settling time, variable
switching frequency during load transients and has
improved light load efficiency with its ability to
automatically change switching frequency.
Fully compliant with IMVP6.5™, the ISL62881C is
easily configurable as a CPU or graphics VCORE
controllers by offering: responds to DPRSLPVR signals
by entering/exiting diode emulations mode; reports
regulator output current via the IMON pin; senses
current by using a discrete resistor or the inductor;
over-temperature thermal compensation of DCR, using
a single NTC thermistor; differential sensing to
accurately monitor and adjust processor die voltage;
minimizes body diode conduction loss in diode
emulation mode with it’s adaptive body diode
conduction time.
Need to aggressively reduce the output capacitor? The
overshoot reduction function is user-selectable and can
be disabled for those concerned about increased
system thermal stress.
Maintaining all the ISL62881C functions, the
ISL62881D offers VR_TT# function for thermal
throttling control. It also offers the split LGATE function
to further improve light load efficiency.
Features
• Precision Core Voltage Regulation
- 0.5% System Accuracy Over-Temperature
- Enhanced Load Line Accuracy
• Supports Multiple Current Sensing Methods
- Lossless Inductor DCR Current Sensing
- Precision Resistor Current Sensing
• Current Monitor
• Differential Remote Voltage Sensing
• Integrated Gate Driver
• Split LGATE Driver to Increase Light-Load
Efficiency (For ISL62881D)
• Adaptive Body Diode Conduction Time Reduction
• User-selectable Overshoot Reduction Function
• Small Footprint 28 Ld 4x4 or 32 Ld 5x5 TQFN
Package
Applications
• Notebook Core Voltage Regulator
• Notebook GPU Voltage Regulator
Related Literature
• See AN1552 for Evaluation Board Application Note
“ISL62881CCPUEVAL2Z User Guide”
• See AN1553 for Evaluation Board Application Note
“ISL62881CGPUEVAL2Z 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)
FN7596 Rev 0.00
March 8, 2010
Page 1 of 37


Renesas Electronics Components Datasheet

ISL62881C Datasheet

Single-Phase PWM Regulator

No Preview Available !

ISL62881C, ISL62881D
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL62881CHRTZ
62881C HRTZ
-10 to +100
28 Ld 4x4 TQFN
L28.4x4
ISL62881CIRTZ
62881C IRTZ
-40 to +100
28 Ld 4x4 TQFN
L28.4x4
ISL62881DHRTZ
62881D HRTZ
-10 to +100
32 Ld 5x5 TQFN
L32.5x5E
NOTES:
1. Add “-T” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. These Intersil Pb-free plastic packaged products employ special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish, which is RoHS compliant and compatible with both
SnPb and Pb-free soldering operations). Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that
meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL62881C, ISL62881D. For more information on
MSL please see techbrief TB363.
Pin Configurations
ISL62881C
(28 LD TQFN)
TOP VIEW
ISL62881D
(32 LD TQFN)
TOP VIEW
28 27 26 25 24 23 22
CLK_EN# 1
PGOOD 2
RBIAS 3
VW 4
COMP 5
FB 6
VSEN 7
GND PAD
(BOTTOM)
21 VID1
20 VID0
19 VCCP
18 LGATE
17 VSSP
16 PHASE
15 UGATE
8 9 10 11 12 13 14
32 31 30 29 28 27 26 25
PGOOD 1
RBIAS 2
VR_TT# 3
NTC 4
GND 5
VW 6
COMP 7
FB 8
GND PAD
(BOTTOM)
24 VID1
23 VID0
22 VCCP
21 LGATEb
20 LGATEa
19 VSSP
18 PHASE
17 UGATE
9 10 11 12 13 14 15 16
Pin Function Description
ISL62881C ISL62881D
1 32
21
32
-3
-4
-5
SYMBOL
CLK_EN#
PGOOD
RBIAS
VR_TT#
NTC
GND
DESCRIPTION
Open drain output to enable system PLL clock. It goes low 13 switching cycles after
VCORE is within 10% of VBOOT.
Power-Good open-drain output indicating when the regulator is able to supply
regulated voltage. Pull up externally with a 680resistor to VCCP or 1.9kto 3.3V.
A resistor to GND sets internal current reference. A 147kresistor sets the controller
for CPU core application and a 47kresistor sets the controller for GPU core
application.
Thermal overload output indicator.
Thermistor input to VR_TT# circuit.
Signal common of the IC. Unless otherwise stated, signals are referenced to the GND
pin.
FN7596 Rev 0.00
March 8, 2010
Page 2 of 37


Part Number ISL62881C
Description Single-Phase PWM Regulator
Maker Renesas
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ISL62881C Datasheet PDF






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