Summary of ONSEMI / FAIRCHILD FAN53526 PROGRAMMABLE TINYBUCK® REGULATORS
The onsemi / Fairchild FAN53526 is a digitally programmable TinyBuck switching regulator providing 3.0A continuous output from 2.5V–5.5V input. Output voltage is set via I2C (up to 3.4MHz). It uses synchronous rectification and a proprietary architecture for >80% efficiency down to 10mA loads. Nominal switching frequency is 2.4MHz to minimize external component size; PFM Power-Save Mode yields ~50µA quiescent current, with automatic fixed-frequency mode at higher loads and shutdown current <1µA. Packaged in a 15-bump WLCSP (1.310mm x 2.015mm, 0.4mm pitch).
Parts used in the FAN53526 TinyBuck Regulators:
- FAN53526 programmable TinyBuck regulator (onsemi / Fairchild)
- External inductors sized for 2.4MHz operation
- Input capacitors compatible with 2.5V–5.5V supply
- Output capacitors (additional capacitance allowed to improve regulation)
- I2C interface connections (SDA, SCL)
- Board footprint for 15-bump WLCSP (1.310mm x 2.015mm, 0.4mm pitch)
onsemi / Fairchild FAN53526 Digitally Programmable TinyBuck® Regulators are switching voltage regulators that provide a digitally programmable output from an input voltage supply of 2.5V to 5.5V. The FAN53526 has an output voltage programmed through an I2C interface capable of operating up to 3.4MHz. The FAN53526 utilizes a proprietary architecture with synchronous rectification delivering 3.0A continuous at over 80% efficiency, maintaining that efficiency at load currents as low as 10mA.
The onsemi / Fairchild FAN53526 Digitally Programmable TinyBuck Regulators have a nominal fixed frequency of 2.4MHz, allowing a reduction of the value of the external components. To improve regulation, additional output capacitance is added without affecting stability. Pulse Frequency Modulation (PFM) operates in Power-Save Mode at moderate and light loads with a typical quiescent current of 50A at room temperature. At higher loads, the system automatically switches to fixed−frequency control, operating at 2.4MHz. In Shutdown Mode, the supply current drops below 1A, reducing power consumption. PFM Mode can be disabled if a fixed frequency is desired.
The FAN53526 is housed in a 15-bump, 1.310mm x 2.015mm, 0.4mm ball pitch WLCSP.
Read more: ONSEMI / FAIRCHILD FAN53526 PROGRAMMABLE TINYBUCK® REGULATORS
- What input voltage range does the FAN53526 support?
The FAN53526 supports an input voltage range of 2.5V to 5.5V. - How is the output voltage programmed?
The output voltage is programmed through an I2C interface capable of operating up to 3.4MHz. - What continuous output current can the FAN53526 deliver?
The device delivers 3.0A continuous output current. - What is the nominal switching frequency of the FAN53526?
The nominal fixed switching frequency is 2.4MHz. - How efficient is the FAN53526 at low loads?
It maintains over 80% efficiency down to load currents as low as 10mA. - What is the quiescent current in Power-Save Mode?
The typical quiescent current in Power-Save Mode is 50µA at room temperature. - Can PFM Power-Save Mode be disabled?
Yes, PFM Mode can be disabled if a fixed frequency is desired. - What is the shutdown supply current?
In Shutdown Mode, the supply current drops below 1µA. - What package does the FAN53526 use?
It is housed in a 15-bump WLCSP measuring 1.310mm x 2.015mm with 0.4mm ball pitch.
