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ISL6271ACR

Description
0.8 A SWITCHING REGULATOR, PQCC20
Categorysemiconductor    Analog mixed-signal IC   
File Size930KB,17 Pages
ManufacturerIntersil ( Renesas )
Websitehttp://www.intersil.com/cda/home/
Download Datasheet Parametric Compare View All

ISL6271ACR Overview

0.8 A SWITCHING REGULATOR, PQCC20

ISL6271ACR Parametric

Parameter NameAttribute value
Number of functions1
Number of terminals20
Rated input voltage3.7 V
Maximum limit input voltage5.5 V
Minimum limit input voltage2.76 V
Maximum operating temperature85 Cel
Minimum operating temperature-25 Cel
Processing package description4 × 4 MM, plastic, MO-220-VGGD, QFN-20
Lead-freeYes
EU RoHS regulationsYes
stateACTIVE
packaging shapeSQUARE
Package SizeChip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mountYes
Terminal formNO
Terminal spacing0.5000 mm
terminal coatingMATTE Tin
Terminal locationFour
Packaging MaterialsPlastic/Epoxy
Temperature levelother
Control TechnologyPulse width MODULATION
Maximum output current0.8000 A
Analog IC other typesswitching regulator
Switch configurationBUCK
DATASHEET
ISL6271A
Integrated XScale Regulator
The ISL6271A is a versatile power management IC (PMIC)
designed for the Xscale type of processors. The device
integrates three regulators, two fault indicators and an I
2
C
bus for communication with a host microprocessor. Two of
the three regulators function as low power, low drop out
regulators, designed to power SRAM and phase-lock loop
circuitry internal to the Xscale processor. The third regulator
uses a proprietary switch-mode topology to power the
processor core and facilitate Dynamic Voltage Management
(DVM), as defined by Intel.
Since power dissipation inside a microprocessor is
proportional to the square of the core voltage, Intel XScale
processors implement DVM as a means to more efficiently
utilize battery capacity. To support this power saving
architecture, the ISL6271A integrates an I
2
C bus for
communication with the host processor. The processor, acting
as the bus master, transmits a “voltage level” and “voltage
slew rate” to the ISL6271A appropriate to the processing
requirements; higher core voltages support higher operating
frequencies and code execution. The bus is fully compliant
with the Phillips® I
2
C protocol and supports both standard
and fast data transmission modes. Alternatively, the output of
the core regulator can be programmed in 50mV increments
from 0.85V to 1.6V using the input Voltage ID (VID) pins. All
three regulators share a common enable pin and are
protected against overcurrent, over temperature and
undervoltage conditions. When disabled via the enable pin,
the ISL6271A enters a low power state that can be used to
conserve battery life while maintaining the last programmed
VID code and slew rate. An integrated soft-start circuit
transitions the ISL6271A output voltages to their default
values at a rate determined by an external soft-start capacitor.
FN9171
Rev 2.00
August 10, 2015
Features
• Three Voltage Regulators (1 Buck, 2 LDOs)
• High-Efficiency, fully-Integrated synchronous buck
regulator with DVM
• 800mA DC output current for the buck regulator
• Proprietary ‘Synthetic Ripple’ Control Topology
• Greater than 1MHz Switching Frequency
• Diode emulation for light load efficiency
• I
2
C Interface Module for DVM from 0.85V to 1.6V
• Optional fixed 4-bit VID-control in lieu of DVM
• Small Output Inductor and Capacitor
• Battery Fault signal
• Input Supply Voltage Range: 2.76V-5.5V
• 4x4 mm QFN Package:
- Compliant to JEDEC PUB95 MO-220
QFN - Quad Flat No Leads - Package Outline
- Near Chip Scale Package footprint, which improves
PCB efficiency and has a thinner profile
• Pb-free Available (RoHS Compliant)
Applications
• PDA
• Cell Phone
• Tablet Devices
• Embedded Processors
Related Literature
• Technical Brief TB379 “Thermal
Characterization of
Packaged Semiconductor Devices”
• Technical Brief TB389 “PCB
Land Pattern Design and
Surface Mount Guidelines for QFN Packages“
• Application Note AN1139
“Setup Instruction for the
ISL6271 Evaluation Kit”
Pinout
ISL6271A (4x4 QFN)
TOP VIEW
BFLT#
BBAT
17
SOFT
GND
16
15 LVCC
14 VPLL
13 VSRAM
12 FB
11 VOUT
6
VID3
7
PGND
8
PHASE
9
PVCC
10
PGOOD
EN
19
20
VCC
VIDEN
SCL/VID0
SDA/VID1
VID2
1
2
3
4
5
18
Ordering Information
PART NUMBER*
ISL6271ACRZ (Note)
TEMP.
RANGE (°C)
-25 to 85
PACKAGE
20 Ld 4x4 QFN
(Pb-free)
PKG.
DWG. #
L20.4x4
*Add “-T” suffix for tape and reel.
NOTE: Intersil Pb-free products employ special Pb-free material sets;
molding compounds/die attach materials and 100% matte tin plate
termination finish, which are 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-020C.
FN9171 Rev 2.00
August 10, 2015
Page 1 of 17

ISL6271ACR Related Products

ISL6271ACR ISL6271A ISL6271ACR-T ISL6271ACRZ-T
Description 0.8 A SWITCHING REGULATOR, PQCC20 0.8 A SWITCHING REGULATOR, PQCC20 0.8 A SWITCHING REGULATOR, PQCC20 0.8 A SWITCHING REGULATOR, PQCC20
Number of functions 1 1 1 1
Number of terminals 20 20 20 20
Rated input voltage 3.7 V 3.7 V 3.7 V 3.7 V
Maximum limit input voltage 5.5 V 5.5 V 5.5 V 5.5 V
Minimum limit input voltage 2.76 V 2.76 V 2.76 V 2.76 V
Maximum operating temperature 85 Cel 85 Cel 85 Cel 85 Cel
Minimum operating temperature -25 Cel -25 Cel -25 Cel -25 Cel
Processing package description 4 × 4 MM, plastic, MO-220-VGGD, QFN-20 4 × 4 MM, plastic, MO-220-VGGD, QFN-20 4 × 4 MM, plastic, MO-220-VGGD, QFN-20 4 × 4 MM, lead FREE, plastic, MO-220-VGGD, QFN-20
Lead-free Yes Yes Yes Yes
EU RoHS regulations Yes Yes Yes Yes
state ACTIVE ACTIVE ACTIVE ACTIVE
packaging shape SQUARE SQUARE SQUARE SQUARE
Package Size Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE Chip CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
surface mount Yes Yes Yes Yes
Terminal form NO NO NO NO
Terminal spacing 0.5000 mm 0.5000 mm 0.5000 mm 0.5000 mm
terminal coating MATTE Tin MATTE Tin MATTE Tin MATTE Tin
Terminal location Four Four Four Four
Packaging Materials Plastic/Epoxy Plastic/Epoxy Plastic/Epoxy Plastic/Epoxy
Temperature level other other other other
Control Technology Pulse width MODULATION Pulse width MODULATION Pulse width MODULATION Pulse width MODULATION
Maximum output current 0.8000 A 0.8000 A 0.8000 A 0.8000 A
Analog IC other types switching regulator switching regulator switching regulator switching regulator
Switch configuration BUCK BUCK BUCK BUCK
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