®
ISL6560
Data Sheet
October 22, 2004
FN9011.3
Microprocessor CORE Voltage Regulator
Two-Phase Buck PWM Controller
The ISL6560 two-phase current mode, PWM control IC
together with companion gate drivers, the HIP6601A,
HIP6602A, HIP6603A or HIP6604 and MOSFETs provides a
precision voltage regulation system for advanced
microprocessors. Two-phase power conversion is a marked
departure from earlier single phase converter configurations
previously employed to satisfy the ever increasing current
demands of modern microprocessors. Multi-phase
converters, by distributing the power and load current,
results in smaller and lower cost transistors with fewer input
and output capacitors. These reductions accrue from the
higher effective conversion frequency with higher frequency
ripple current due to the phase interleaving process of this
topology. For example, a two phase converter operating at
350kHz per phase will have a ripple frequency of 700kHz.
Higher converter bandwidth is also achievable, resulting in
faster response to load transients.
An outstanding feature of this controller IC includes high-
side current sensing with a single current sampling resistor
in the input line to the output MOSFET transistors. This
single current sampling resistor monitors each channels
input current assuring excellent current sharing. Current
mode control results in rapid response to changing load
demands.
Also featured are programmable VID codes with an accuracy
of
±0.8%
that range from 1.100–1.850V, and are set by the
microprocessor. Pull up currents on these VID pins
eliminates the need for external pull-up resistors.
Another feature of this controller IC is the PWRGD monitor
circuit and load protection circuits which provide overvoltage
protection, overcurrent protection and undervoltage
indication.
Features
• Two-phase power conversion
• Precision channel current sharing
• Precision CORE voltage regulation
-
±0.8%
accuracy
• Microprocessor voltage identification input
- VRM 9.0 compliant
- 5-bit VID input
- 1.100 to 1.850V in 25mV steps
- Programmable “droop” voltage
• Fast transient recovery time
• Overcurrent protection
• High output ripple frequency. . . . . . . . . . . . . 100kHz to 2MHz
•
Pb-Free Available (RoHS Compliant)
Applications
• VRM9.X modules
• AMD Athlon™ processor voltage regulator
• Low output voltage, high current DC/DC converters
Related Literature
• Technical Brief TB363
Guidelines for Handling and
Processing Moisture Sensitive Surface Mount Devices
(SMDs)
Pinout
ISL6560 (SOIC)
TOP VIEW
VID4 1
VID3 2
VID2 3
VID1 4
16 VCC
15 REF
14 CS-
13 PWM1
12 PWM2
11 CS+
10 PWRGD
9 GND
Ordering Information
PART NUMBER
ISL6560CB
ISL6560CB-T
ISL6560CBZ
(See Note)
ISL6560CBZ-T
(See Note)
ISL6560/62EVAL1
TEMP. (°C)
0 to 70
0 to 70
PACKAGE
16 Ld SOIC
16 Ld SOIC
(Pb-free)
PKG.
DWG.#
M16.15
M16.15
VID0 5
COMP 6
FB 7
CT 8
16 Ld SOIC Tape and Reel
16 Ld SOIC Tape and Reel (Pb-free)
Evaluation Platform
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.
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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