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Home » NEWEST Products » New by Manufacturer » Fairchild Semiconductor » FAN53555 Digitally Programmable TinyBuck Regulators - Fairchild
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Fairchild FAN53555 Digitally Programmable TinyBuck® Regulators

Fairchild FAN53555 Digitally Programmable
TinyBuck® Regulators

Fairchild's FAN53555 Digitally Programmable TinyBuck® Regulators are a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5V to 5.5V. The output voltage is programmed through an I2C interface capable of operating up to 3.4MHz. Using a proprietary architecture with synchronous rectification, the FAN53555 is capable of delivering 5A continuous at over 80% efficiency, while maintaining over 80% efficiency at load currents as low as 10mA. Pulse currents as high as 6.5A can be supported by the 05 option. The regulator operates at a nominal fixed frequency of 2.4MHz, which reduces the value of the external components to 330nH for the output induction and as low as 20µF for the output capacitor. Additional output capacitance can be added to improve regulation during load transients without affecting stability. Inductance of up to 1.2µH may be used with additional output capacitance.

Features
  • Fixed-Frequency Operation: 2.4MHz
  • Best-in-Class Load Transient
  • Continuous Output Current Capability: 5A
  • Pulse Current Capability: 6.5A (05 Option)
  • 2.5V to 5.5V Input Voltage Range
  • Digitally Programmable Output Voltage
    • 00/01/03/05/08/18 Options: 0.6-1.23V in 10mV Steps
    • 04/042/09 Options: 0.603-1.411V in 12.826mV Steps
    • 23 Option: 0.60-1.3875V in 12.5mV Steps
    • 24 Option: 0.603-1.420V in 12.967mV Steps
    • 13 Option: 0.8-1.43V in 10mV Steps
  • Programmable Slew Rate for Voltage Transitions
  • I2C-Compatible Interface Up to 3.4Mbps
  • PFM Mode for High Efficiency in Light Load
  • Quiescent Current in PFM Mode: 60µA (Typical)

  • Internal Soft-Start
  • Input Under-Voltage Lockout (ULVO)
  • Thermal Shutdown and Overload Protection
  • 20-Bump Wafer-Level Chip Scale Package (WLCSP)

Applications
  • Application, Graphic, and DSP Processors
    • ARM™, Krait™, OMAP™, NovaThor™, ARMADA™
  • Hard Disk Drives
  • Tablets, Netbooks, Ultra-Mobile PCs
  • Smart Phones
  • Gaming Devices
Typical Application
Typical Application
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