900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




Renesas Electronics Components Datasheet

ISL62881B Datasheet

Single-Phase PWM Regulator

No Preview Available !

DATASHEET
ISL62881, ISL62881B
Single-Phase PWM Regulator for IMVP-6.5™ Mobile CPUs and GPUs
FN6924
Rev 3.00
June 16, 2011
The ISL62881 is a single-phase PWM buck regulator for
miroprocessor or graphics processor core power supply. It uses an
integrated gate driver to provide a complete solution. The PWM
modulator of ISL62881 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 ISL62881 can be configured as CPU or graphics Vcore
controller and is fully compliant with IMVP-6.5™ 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.
Maintaining all the ISL62881 functions, the ISL62881B 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
• 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
• Split LGATE Driver to Increase Light-Load Efficiency (for
ISL62881B)
• Adaptive Body Diode Conduction Time Reduction
• User-selectable Overshoot Reduction Function
• Capable of Disabling the Droop Function
• Audio-filtering for GPU Application
• Small Footprint 28 Ld 4x4 TQFN Package
• Pb-Free (RoHS Compliant)
Applications
• Notebook Computers
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
TEMP. RANGE
(°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL62881HRTZ
628 81HRTZ
-10 to +100
28 Ld 4x4 TQFN
L28.4x4
ISL62881BHRTZ
62881B 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 ISL62881, ISL62881B. For more information on MSL please see techbrief
TB363.
FN6924 Rev 3.00
June 16, 2011
Page 1 of 35


Renesas Electronics Components Datasheet

ISL62881B Datasheet

Single-Phase PWM Regulator

No Preview Available !

ISL62881, ISL62881B
Pin Configurations
ISL62881
(28 LD TQFN)
TOP VIEW
ISL62881B
(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 Descriptions
GND (Bottom Pad)
Signal common of the IC. Unless otherwise stated, signals are
referenced to the GND pin.
CLK_EN#
Open drain output to enable system PLL clock; goes active 13
switching cycles after Vcore is within 10% of Vboot.
PGOOD
Power-Good open-drain output indicating when the regulator is
able to supply regulated voltage. Pull-up externally with a 680
resistor to VCCP or 1.9kto 3.3V.
RBIAS
A resistor to GND sets internal current reference. A 147k
resistor sets the controller for CPU core application and a 47k
resistor sets the controller for GPU core application.
VR_TT#
Thermal overload output indicator.
NTC
Thermistor input to VR_TT# circuit.
VW
A resistor from this pin to COMP programs the switching
frequency (8kgives approximately 300kHz).
FN6924 Rev 3.00
June 16, 2011
COMP
This pin is the output of the error amplifier. Also, a resistor across this
pin and GND adjusts the overcurrent threshold.
FB
This pin is the inverting input of the error amplifier.
VSEN
Remote core voltage sense input. Connect to microprocessor die.
RTN
Remote voltage sensing return. Connect to ground at
microprocessor die.
ISUM- and ISUM+
Droop current sense input.
VDD
5V bias power.
VIN
Battery supply voltage, used for feed-forward.
IMON
An analog output. IMON outputs a current proportional to the
regulator output current.
BOOT
Connect an MLCC capacitor across the BOOT and the PHASE
pins. The boot capacitor is charged through an internal boot
Page 2 of 35


Part Number ISL62881B
Description Single-Phase PWM Regulator
Maker Renesas
PDF Download

ISL62881B Datasheet PDF






Similar Datasheet

1 ISL62881 Single-Phase PWM Regulator
Renesas
2 ISL62881B Single-Phase PWM Regulator
Renesas
3 ISL62881C Single-Phase PWM Regulator
Renesas
4 ISL62881D Single-Phase PWM Regulator
Renesas





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z



Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy