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iP1201 and iP1202: Single/Dual Output Full Function 2-Phase DC-DC Converter Synchronous Buck Power Blocks
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International Rectifier’s new iPOWIR™ iP1201 and iP1202 are the first dual output, two phase DC-DC synchronous power blocks available in one easy to use package. These new power blocks allow the systems designer to use a single device to supply two independent voltage rails, simplifying power supply design and shrinking space significantly versus equivalent circuits using discrete components.
The iP1201 and iP1202 are fully optimized solutions for medium current synchronous buck applications requiring up to 15A dual or 30A single outputs with interleaved input. The new iPOWIR devices feature built-in, full function PWM control and protection circuits with optimized power semiconductors and associated passives, achieving high power density. Only an output inductor, input and output capacitors per channel and a few external components are required to build a complete synchronous buck power supply.
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FEATURES AT A GLANCE
 | Reduces board space:
- up to 59% for the iP1201/iP1202 component equivalent discrete solution
- up to 30% for the complete converter solution versus discrete solutions
- up to 16% versus power supply module solutions |
| Reduced design complexity versus discrete solutions |
| Improved solution flexibility versus power supply module solutions |
| Improved time-to-market (up to 3 months design iteration time) |
| No de-rating up to 90°C PCB and case temperature – many module solutions de-rate up to 50% in similar environments |
| 2-Phase Synchronous Power Block – minimizing input capacitors |
| Single or Dual output capability |
| Dual 15A maximum load capability |
| Single 2-Phase 30A maximum load capability |
| 200-400kHz per channel nominal switching frequency |
| Over Current Hiccup or Over Current Latch – Hiccup mode allows for much
improved system up-time, allowing auto-start upon removal of a temporary short-circuit |
| External Synchronization Capable – reducing system filtering complexity |
| Over voltage protection |
| Independent soft start per output – good for power sequencing options |
| Over Temperature Protection |
| Very small outline (15.5mm x 9.25mm x 2.6mm) w Guaranteed power loss – for known performance on board |
| Guaranteed power loss – for known performance on board |
| No external bias supply required – both the iP1201 and iP1202 will
operate directly from the input voltage provided |
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APPLICATIONS
| Non-isolated point-of-load buck converter |
| Netcom processor units & ASICs with dual logic (core & I/O) |
| Netcom peripheral rails in close proximity (low power (15A) |
| Netcom single POL (mid power <30A) |
| Other dual output DC-DC converter applications |
| Simple building block architecture provides high current density for dual/single output buck converters:
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| One iP1201/iP1202 for dual or single output |
| No external bias circuitry needed |
| Interleaved input current minimizes input caps |
| Single output 2 phase reduces output caps |
| Only input and output capacitors plus output inductors per channel are required to complete the circuit |
| Significant flexibility for external component layout & selection |
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Eliminates the need to specify, qualify, procure and assemble up to 20 or more critical discrete components.
iPOWIR technology creates a power “building block” in which all layout and performance-critical items are integrated into one high-density, pre-designed and pre-tested sub system. The circuit designer gets highly predictable, highly efficient and completely guaranteed performance not previously possible with embedded discrete designs. Both the iP1201 and iP1202 are extremely flexible allowing a wide input and output voltage range. The iP1201 covers input bus voltages from 3V to 5.5V and the iP1202 covers from 5.5V to 13.2V, with outputs going down as low as 0.8V and as high as 5V at full current.
iP1201/iP1202 Simplified Internal Schematics
Replaces up to 20 or more discrete components at 1/2 the size
The new devices provide over-voltage and over-temperature protection, while independent soft start for each output enables various power sequencing and tracking options. In addition, a single control pin on the
new iP1201 and iP1202 enable an over-current hiccup or over current latch function. The hiccup function is good for high reliability systems that require a high percentage of up-time. As soon as the short-circuit is
removed, the output voltage is recovered thus eliminating the need for the overall power to the system to be recycled. The new iP1201 and iP1202 reduces the number of discrete components needed, simplifying the design, reducing time to market, and taking up less board space. It is a standard building block for multiple voltage rails, which can be used in multiple applications, eliminating the need to continuously specify new designs. It allows the designer to use a single device to supply two voltage rails. The device has many features and functions and a large amount of flexibility giving the designer many design choices. Simulation support and reference design kits are available for iP1201/iP1202.
Specifications
| Part Number |
Package |
VIN (min/max) |
VOUT |
IOUT - Double-sided heatsinking* |
IOUT - Single-sided heatsinking** |
Frequency |
| iP1201 |
BGA 9.25mm x 15.5mm x 2.6mm |
3.14V-5.5V |
0.8V-2.5V for 3.3VIN
0.8V-3.3V for 5VIN |
15A dual
30A single |
11.5A dual
23A single |
200kHz - 400kHz |
| iP1202 |
BGA 9.25mm x 15.5mm x 2.6mm |
5.5V-13.2V |
0.8V-5V for 12VIN
0.8V-3.3V for <6VIN |
15A dual
30A single |
11A dual
22A single |
200kHz - 400kHz |
Conditions
* Case and PCB temperature regulated to 90°C
** PCB temperature regulated to 90°C, no airflow
MyPower™ Simulation support and reference design kits are available for the iP1201 and iP1202.
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