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iPOWIR™ Building Blocks for Multiphase Buck Converters
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The iP200x family of functional “building blocks” for multi-phase buck converters are used to power GHz class
CPUs in high-end desktops, workstations and servers. Based on International Rectifier’s iPOWIR™ technology,
the iP200x family integrates the power semiconductors, a driver IC and layout-critical passives required for each
phase of a multiphase synchronous buck converter into a single ball grid array (BGA) or land grid array (LGA) package.
GHz class CPUs require lower voltages, higher currents and faster transient response, all this
in reduced solution footprints. Higher power density and transient response requirements
can only be achieved by reducing the size of passives and increasing operating frequencies.
However, increased emphasis on power density and higher operating frequencies can lead to
greater layout challenges and higher parasitic losses.
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THE IR ADVANTAGE
 | Replaces up to 10 discretes per phase |
| Switching frequency up to 1MHz per phase |
| Up to 44% footprint reduction over discrete solutions |
| No current derating up to 100°C PCB temperature |
| Saves up to 3 months in design time |
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APPLICATIONS
| High-current multiphase synchronous buck converters to power:
- CPUs in high-end desk tops, servers, and work stations
- Network processing units (NPUs) and application-specific ICs (ASICs) used in net-working, telecom switchers and routers
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The iPOWIR technology platform at International Rectifier capitalizes on proprietary multi-chip
packaging, opening the doors to new levels in power density and enabling
the performance required by future converters. The iPOWIR technology is an example of IR’s power
management expertise in all areas and is much more than simply integrating functions. Benchmark power
semiconductors are matched with control ICs, optimized packaging and advanced system design. Only when
all of these aspects are combined can complete functionality be bundled into a tiny, easy to design
solution.
Integration reduces parasitic losses enabling the devices to achieve high efficiency, while reducing
solution footprint by up to 44%. Design time and effort are reduced because one device replaces
up to 10 discrete components per phase, significantly reducing part count. The iP200x family of devices
requires only a multiphase PWM IC, input and output capacitors and output inductors to enable the design
of a fully functional mutiphase buck converter.
Specifications
| Part Number |
VIN |
VDD |
VOUT |
IOUT (max) |
Frequency |
Package |
| iP2001 |
5-12V |
5V |
0.9-3.3V |
20A |
250-1000kHz |
11mm x 11mm x 3mm BGA |
| iP2002 |
2.5-12V |
5V |
0.9-3.3V |
30A |
250-1000kHz |
11mm x 11mm x 2.6mm BGA |
| iP2003A |
3-13.2V |
5V |
0.8-3.3V |
40A |
300-1000kHz |
11mm x 9mm x 2.2mm LGA |
| iP2005A |
6.5-13.2V |
5V |
0.89-5.5V |
40A |
250-1500kHz |
7.7mm x 7.7mm x 1.7mm LGA |
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iP200x Functional Block Diagram
Simple Recipe to Design High-Current, Single Phase Converters:
| 1 iP200x per phase |
| 1 multiphase controller IC |
| Input and output capacitors |
| Output inductors |
| Lay out above components to meet space requirements |
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Reference designs demonstrate this innovative
technology for the high-current and fast transient response times required
in today’s power-hungry CPUs, NPUs and ASICs. The IRDCiP2001-C, four-phase reference
design offers up to 88.5% efficiency at 80A full load, 1.6VOUT and 500kHz
in still air.
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Reference Design Kit Specifications: VIN - 5-12V, VOUT - 1-2V
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