Design it Your Way... 6A, 12A, 18A, You Choose
International Rectifier has introduced two one-percent accurate, single output, synchronous buck PWM controllers with 4.5V to 16V input voltage capability. The IR3637SPbF and IR3637ASPbF are compact and simple solutions for up to 15A DC-to-DC point-of-load applications such as dual data rate (DDR) memory, field programmable gate arrays (FPGAs) and video graphics processors. Combined with International Rectifier’s broad selection of power MOSFETs, these two controllers offer greater design flexibility and improved performance versus integrated solutions.
The two PWM controllers feature a 0.8V, one percent accurate voltage reference. In next generation systems, peripheral rails can require as little as 3% total voltage error tolerance to ensure data signal integrity. The two new PWM ICs with one percent accuracy allow designers to meet this stringent requirement. Both ICs include short circuit protection, input under voltage lockout and an externally programmable soft-start function. The devices are available in the standard SO-8 package.
The IR3637SPbF operates at 400kHz, suitable for output currents up to 15A for applications including desktop motherboard peripheral rails such as DDR memory and chip set power.
The IR3637ASPbF runs at 600kHz and provides optimum efficiency in applications requiring less than 7A such as FPGAs. The 600kHz operating frequency reduces required inductor size when compared to lower frequency solutions and increases control loop bandwidth for improved transient response. Both PWM controllers are suitable for general purpose DC-to-DC conversion in a variety of other switching power supply applications.
“For 12V input applications, designers have limited choices for integrated point of load solutions. International Rectifier has put together these two ICs with its world class power MOSFETs to create a menu of options enabling the ‘ease of use benefits’ that integrated solutions offer with the flexibility and performance of discrete topologies,” said Faisal Ahmad, Marketing Manager for DC-to-DC computing products.
| Part Number |
Package |
Switching
Frequency |
Iout |
Vin |
Max Duty
Cycle |
Reference
Voltage |
| IR3637SPbF |
SO-8 |
400kHz |
Up to 15A |
4V – 16V |
85% |
0.8 |
| IR3637ASPbF |
SO-8 |
600kHz |
Up to 7A |
4V – 16V |
85% |
0.8 |
Optimized Single-Phase Synchronous Buck Reference Designs targeting at up to 6A, 12A and 18A, with On-Line Hardware Customization and Simulation Capability
International Rectifier’s new POWIR+ Chipsets, based on IR’s IC and MOSFET products, are supported with highly dependable power management reference designs and enhanced on-line design services, enabling faster time to market and reducing risks of having to complete extra unnecessary design iterations. The first set of three POWIR+ Chipsets are based on IR’s IR3637S and IR3637AS controllers, targeted at single-phase synchronous buck converter applications in computing and high end consumer applications.
FEATURES
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- Solid power design expertise built into the reference design to provide predictable electrical and thermal performance representative of a real-life system
- Customization capability offered on all IRPP3637-xxA POWIR+ Chipset reference designs, to meet specific end system requirements
- POWIR+ Chipset reference designs can be fully simulated on-line, providing bode plots, small signal & large signal analysis
- Full Schematics, bill-of-materials and gerber files are all available
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TARGET APPLICATIONS
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- Computing and high end consumer applications
- To target applications that differ from the standard reference design specifications, all of the boards are customizable across a wide range
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Featured Products
| Part Number |
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Description |
Data
Sheet |
App.
Notes |
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| IR3637ASPBF |
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1% Accurate Synchronous PWM Controller
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| IR3637SPBF |
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1% Accurate Synchronous PWM Controller
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