ISL6219 Datasheet, PDF (1/17 Pages) Intersil Corporation – Microprocessor CORE Voltage Regulator Precision Multi-Phase BUCK PWM Controller for Mobile Applications

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Data Sheet
June 2002
ISL6219
FN9080.1
Microprocessor CORE Voltage Regulator
Precision Multi-Phase BUCK PWM
Controller for Mobile Applications
The ISL6219 provides core-voltage regulation by driving up
to three interleaved synchronous-rectified buck-converter
channels in parallel. Intersil multi-phase controllers together
with ISL6207 gate drivers form the basis for the most reliable
power-supply solutions available to power the latest
industry-leading microprocessors. Multi-phase buck-
converter architecture uses interleaved timing to multiply
ripple frequency and reduce input and output ripple currents.
Lower ripple results in lower total component cost, reduced
dissipation, and smaller implementation area. Pre-
configured for 3-phase operation, the ISL6219 also offers 2-
phase operation. Simply connect the unused PWM pin to
+5V. The channel switching frequency is adjustable in the
range of 100kHz to 1.5MHz giving the designer the ultimate
flexibility in managing the balance between high-speed
response and good thermal management.
New features on the ISL6219 include Dynamic-VID™
technology allowing seamless on-the-fly VID changes with
no need for any additional external components. When the
ISL6219 receives a new VID code, it incrementally steps the
output voltage to the new level. Dynamic VID™ changes are
fast and reliable with no output voltage overshoot or
undershoot.
Like other Intersil multiphase controllers, the ISL6219 uses
cost and space-saving r_DS(ON) sensing for channel current
balance and dynamic voltage positioning. Channel current
balancing is automatic and accurate with the integrated
current-balance control system. Over current protection can
be tailored to any application with no need of additional
parts.
An integrated DAC decodes the 5-bit logic signal present at
VID0-VID4 and provides an accurate reference for precision
voltage regulation. The high-bandwidth error amplifier and
accurate voltage reference all work together to provide
better than 0.8% total system accuracy, and to enable the
fastest transient response available. A window comparator
toggles PGOOD if the output voltage moves out of range
and acts to protect the load in case of over voltage.
Features
• Multi-Phase Power Conversion
• Active Channel Current Balancing
• Lossless current sense scheme
- Uses MOSFET’s R_DS(ON)
- Optional current sense method higher precision
• Precision CORE Voltage Regulation
- ±0.8% System Accuracy Over Temperature
• Microprocessor Voltage Identification Input
- Dynamic VID technology
- 5-Bit VID Input
- 1.100V to 1.850V in 25mV Steps
• Programmable Droop Voltage
• Fast Transient Recovery Time
• Over Voltage, Under Voltage and Overcurrent Protection
• Power-Good Output
• 2 or 3 Phase Operation
• User selectable Switching Frequency of 100K - 1.5MHz
- 200KHz - 4.5MHz Effective Ripple Frequency
Ordering Information
PART NUMBER TEMP. (^oC) PACKAGE PKG. NO.
ISL6219CA
-10 to 85 28-Ld SSOP M28.15
Pinout
ISL6219 (28 LEAD SSOP)
TOP VIEW
VID 0 1
VID 1 2
VID 2 ³
VID 3 4
VID 4 5
NC ₆
FSET/EN 7
NC 8
FB ⁹
COMP ¹⁰
NC 11
NC 12
NC 13
GND 14
28 VCC
27 NC
26 _NC
25 _PGOOD
24 _NC
23 ISEN1
22 _PWM1
21 PWM2
20 _ISEN2
19 ISEN3
18 PWM3
17 NC
16 _VSEN
15 _NC
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 321-724-7143 | Intersil (and design) is a trademark of Intersil Americas Inc.
Copyright © Intersil Americas Inc. 2002. All Rights Reserved
Dynamic VID is a trademark of Intersil Americas Inc.