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FAN53555: 5 A, 2.4 MHz, Digitally Programmable TinyBuck™ Regulator
The FAN53555 is a step-down switching voltage regulator that delivers a digitally programmable output from an input voltage supply of 2.5 V to 5.5 V. The output voltage is programmed through an I2C interface capable of operating up to 3.4 MHz.
Using a proprietary architecture with synchronous rectification, the FAN53555 is capable of delivering 5 A continuous at over 80% efficiency, while maintaining over 80% efficiency at load currents as low as 10 mA. Pulse currents as high as 6.5 A can be supported by the 05 option. The regulator operates at a nominal fixed frequency of 2.4 MHz, which reduces the value of the external components to 330 nH for the output induction and as low as 20 µF for the output capacitor. Additional output capacitance can be added to improve regulation during load transients without affecting stability. Inductance up to 1.2 µH may be used with additional output capacitance.
At moderate and light loads, Pulse Frequency Modulation (PFM) is used to operate in Power-Save Mode with a typical quiescent current of 60 µA. Even with such a low quiescent current, the part exhibits excellent transient response during large load swings. At higher loads, the system automatically switches to fixed-frequency control, operating at 2.4 MHz. In Shutdown Mode, the supply current drops below 1 µA, reducing power consumption. PFM Mode can be disabled if constant frequency is desired. The FAN53555 is available in a 20-bump, 1.6 x 2 mm, WLCSP.
| FAN53555 Datasheet |
Features
- Fixed-Frequency Operation: 2.4 MHz
- Best-in-Class Load Transient
- Continuous Output Current Capability: 5 A
- Pulse Current Capability: 6.5 A (05 Option)
- 2.5 V to 5.5 V Input Voltage Range
- Digitally Programmable Output Voltage:
- 00/01/03/05/08 Options: 0.60-1.23 V in 10 mV Steps
- 04/042 Option: 0.603-1.411 V in 12.826 mV Steps
- 00/01/03/05/08 Options: 0.60-1.23 V in 10 mV Steps
- 04/042 Option: 0.603-1.411 V in 12.826 mV Steps
- Programmable Slew Rate for Voltage Transitions
- I2C-Compatible Interface Up to 3.4 Mbps
- PFM Mode for High Efficiency in Light Load
- Quiescent Current in PFM Mode: 60 µA (Typical)
- Internal Soft-Start
- Input Under-Voltage Lockout (UVLO)
- Thermal Shutdown and Overload Protection
- 20-Bump Wafer-Level Chip Scale Package (WLCSP)
| Product | Product & Eco Status | Unit Price/1K Order | Packing Method Convention | Package Marking Convention* |
|---|---|---|---|---|
| FAN53555BUC18X | Full Production Green as of Dec 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CU&K
Line 2&. (Pin One) |
| FAN53555BUC08X | Full Production Green as of Nov 2012 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BJ&K
Line 2&. (Pin One) |
| FAN53555BUC05X | Full Production Green as of Nov 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BU&K
Line 2&. (Pin One) |
| FAN53555UC08X | Full Production Green as of May 2012 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BW&K
Line 2&. (Pin One) |
| FAN53555UC18X | Full Production Green as of Dec 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CU&K
Line 2&. (Pin One) |
| FAN53555BUC09X | Full Production Green as of Jan 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CP&K
Line 2&. (Pin One) |
| FAN53555UC09X | Full Production Green as of Jan 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CP&K
Line 2&. (Pin One) |
| FAN53555BUC23X | Full Production ROHS Compliant as of 27-Feb-2006 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CW&K
Line 2&. (Pin One) |
| FAN53555BUC13X | Full Production Green as of Mar 2017 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CT&K
Line 2&. (Pin One) |
| FAN53555BUC24X | Full Production Green as of Jul 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CR&K
Line 2&. (Pin One) |
| FAN53555UC042X | Full Production Green as of May 2012 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BX&K
Line 2&. (Pin One) |
| FAN53555UC04X | Full Production Green as of Feb 2012 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BP&K
Line 2&. (Pin One) |
| FAN53555UC03X | Full Production Green as of May 2011 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BN&K
Line 2&. (Pin One) |
| FAN53555UC05X | Full Production Green as of Nov 2011 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BU&K
Line 2&. (Pin One) |
| FAN53555UC00X | Full Production Green as of Apr 2011 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BK&K
Line 2&. (Pin One) |
| FAN53555UC13X | Full Production ROHS Compliant as of 27-Feb-2006 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CT&K
Line 2&. (Pin One) |
| FAN53555UC24X | Full Production Green as of Jul 2013 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1CR&K
Line 2&. (Pin One) |
| FAN53555UC01X | Full Production Green as of Apr 2011 China RoHS | $0.8477 | WL-CSP 20L
-
0.625 x 0 x 0mm,
TAPE REEL
| Line 1BL&K
Line 2&. (Pin One) |
- WL-CSP 20L Drawing Last Update: Nov 2015
- WLCSP UC020AA, Packing Drawing Last Update: Jan 2016
