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PDF ISL6261A Data sheet ( Hoja de datos )
| Número de pieza | ISL6261A | |
| Descripción | Single-Phase Core Regulator | |
| Fabricantes | Intersil | |
| Logotipo |  |
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NORTECROECMOMMEMNDENEIDDSLER6DE2PF88OL4ARCCN ®EEMWENDTEDSPIaAGtRaNTSSheet
Single-Phase Core Regulator for IMVP-6®
Mobile CPUs
The ISL6261A is a single-phase buck regulator
implementing lntel® IMVP-6® protocol, with embedded gate
drivers. lntel® Mobile Voltage Positioning (IMVP) is a smart
voltage regulation technology effectively reducing power
dissipation in lntel® Pentium processors.
The heart of the ISL6261A is the patented R3 Technology™,
Intersil’s Robust Ripple Regulator modulator. Compared with
the traditional multi-phase buck regulator, the R3
Technology™ has faster transient response. This is due to
the R3 modulator commanding variable switching frequency
during a load transient.
The ISL6261A provides three operation modes: the
Continuous Conduction Mode (CCM), the Diode Emulation
Mode (DEM) and the Enhanced Diode Emulation Mode
(EDEM). To boost battery life, the ISL6261A changes its
operation mode based on CPU mode signals DPRSLRVR
and DPRSTP#, and the FDE pin setting, to maximize the
efficiency. In CPU active mode, the ISL6261A commands
the CCM operation. When the CPU enters deeper sleep
mode, the ISL6261A enables the DEM to maximize the
efficiency at light load. Asserting the FDE pin of the
ISL6261A in CPU deeper sleep mode will enable the EDEM
to further decrease the switching frequency at light load and
increase the regulator efficiency.
A 7-bit Digital-to-Analog Converter (DAC) allows dynamic
adjustment of the core output voltage from 0.300V to 1.500V.
The ISL6261A has 0.5% system voltage accuracy over
temperature.
A unity-gain differential amplifier provides remote voltage
sensing at the CPU die. This allows the voltage on the CPU
die to be accurately measured and regulated per lntel®
IMVP-6 specification. Current sensing can be implemented
through either lossless inductor DCR sensing or precise
resistor sensing. If DCR sensing is used, an NTC thermistor
network will thermally compensates the gain and the time
constant variations caused by the inductor DCR change.
The ISL6261A provides the power monitor function through
the PMON pin. PMON output is a high-bandwidth analog
voltage signal representing the CPU instantaneous power.
The power monitor function can be used by the system to
optimize the overall power consumption, extending battery
run time.
November 5, 2009
ISL6261A
FN6354.3
Features
• Precision single-phase CORE voltage regulator
- 0.5% system accuracy over temperature
- Enhanced load line accuracy
• Internal gate driver with 2A driving capability
• Microprocessor voltage identification input
- 7-Bit VID input
- 0.300V to 1.500V in 12.5mV steps
- Support VID change on-the-fly
• Multiple current sensing schemes supported
- Lossless inductor DCR current sensing
- Precision resistive current sensing
• Thermal monitor
• Power monitor indicating CPU instantaneous power
• User programmable switching frequency
• Differential remote voltage sensing at CPU die
• Overvoltage, undervoltage, and overcurrent protection
• Pb-free (RoHS compliant)
Ordering Information
PART NUMBER
PART
(Notes 2, 3)
MARKING
TEMP.
RANGE
(°C)
PACKAGE PKG.
(Pb-Free) DWG. #
ISL6261ACRZ ISL6261 ACRZ -10 to +100 40 Ld 6x6 QFN L40.6x6
ISL6261ACRZ-T* ISL6261 ACRZ -10 to +100 40 Ld 6x6 QFN L40.6x6
(Note 1)
Tape and Reel
ISL6261AIRZ 6261A IRZ -40 to +100 40 Ld 6x6 QFN L40.6x6
ISL6261AIRZ-T* 6261A IRZ
(Note 1)
-40 to +100 40 Ld 6x6 QFN L40.6x6
Tape and Reel
NOTES:
1. 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 ISL6261A. For more information on MSL please see
techbrief TB363.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc.
Copyright Intersil Americas Inc. 2006, 2007, 2009. All Rights Reserved. R3 Technology™ is a trademark of Intersil Americas Inc.
All other trademarks mentioned are the property of their respective owners.
1 page  
ISL6261A
Electrical Specifications VDD = 5V, TA = -40°C to +100°C, unless otherwise specified. (Continued) Boldface limits apply over the
operating temperature range, -40°C to +100°C. (Continued)
PARAMETER
SYMBOL
TEST CONDITIONS
MIN
(Note 7)
MAX
TYP (Note 7) UNITS
Leakage
POWER GOOD and PROTECTION MONITOR
VR = 16V
- - 1 μA
PGOOD Low Voltage
PGOOD Leakage Current
PGOOD Delay
VOL
IOH
tpgd
IPGOOD = 4mA
PGOOD = 3.3V
CLK_EN# low to PGOOD high
- 0.11 0.4 V
-1 - 1 µA
5.5 6.8 8.1 ms
Overvoltage Threshold
Severe Overvoltage Threshold
OCSET Reference Current
OC Threshold Offset
OVH
OVHS
VO rising above setpoint > 1ms
VO rising above setpoint > 0.5µs
I(RBIAS) = 10µA
DROOP rising above OCSET > 120µs
155
1.675
9.8
-3.5
195 235 mV
1.7
1.725
V
10 10.2 µA
- 3.5 mV
Undervoltage Threshold
(VDIFF-SOFT)
UVf VO below set point for > 1ms
-360
-300
-240 mV
LOGIC THRESHOLDS
VR_ON and DPRSLPVR Input Low
VR_ON and DPRSLPVR Input High
Leakage Current on VR_ON
Leakage Current on DPRSLPVR
DAC(VID0-VID6), PSI# and
DPRSTP# Input Low
VIL(3.3V)
VIH(3.3V)
IIL
IIH
IIL_DPRSLP
IIH_DPRSLP
VIL(1.0V)
Logic input is low
Logic input is high
DPRSLPVR logic input is low
DPRSLPVR logic input is high
- - 1V
2.3 - - V
-1 0 - μA
- 0 1 μA
-1 0 - μA
- 0.45 1 μA
- - 0.3 V
DAC(VID0-VID6), PSI# and
DPRSTP# Input High
VIH(1.0V)
0.7 - - V
Leakage Current of DAC(VID0-VID6) IIL DPRSLPVR logic input is low
and DPRSTP#
IIH DPRSLPVR logic input is high
THERMAL MONITOR
-1 0 - μA
- 0.45 1 μA
NTC Source Current
NTC = 1.3 V
53 60 67 µA
Over-temperature Threshold
V(NTC) falling
1.17 1.2 1.25 V
VR_TT# Low Output Resistance
CLK_EN# OUTPUT LEVELS
RTT I = 20mA
- 5 9Ω
CLK_EN# High Output Voltage
VOH 3V3 = 3.3V, I = -4mA
2.9 3.1 - V
CLK_EN# Low Output Voltage
VOL
ICLK_EN# = 4mA
- 0.18 0.4 V
NOTES:
6. Limits established by characterization and are not production tested.
7. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
5 FN6354.3
November 5, 2009
5 Page 
ISL6261A
Simplified Application Circuit for Resistive Current Sensing
V
+3.3
V
+5
R4
V
in
C4
R5
R6
C5
VR_TT#
VID<0:6>
DPRSTP#
DPRSLPVR
PMON
CLK_ENABLE#
VR_ON
IMVP6_PWRGD
VCC-SENSE
VSS-SENSE
C3
R2
R7
C7
C2
R3 C1
R1
3V3
RBIAS
VDD
VCCP
VIN
NTC
SOFT
UGATE
BOOT
VR_TT#
VIDs
PHASE
DPRSTP#
DPRSLPVR
FDE
LGATE
PMON
VSSP
CLK_EN#
VR_ON
PGOOD
VSUM
VSEN
RTN
ISL6261A
VO
VW
OCSET
C6
C9
R10
COMP
DFB
FB
VDIFF
DROOP
VSS
C8
L
o
R8
R11
C10
R12
R
sen
Vo
Co
FIGURE 3. ISL6261A-BASED IMVP-6® SOLUTION WITH RESISTIVE CURRENT SENSING
11 FN6354.3
November 5, 2009
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet ISL6261A.PDF ] | |
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