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This literature is subject to all applicable copyright laws and is not for resale in any manner.FAN5400 Family USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator July 2015 FAN5400 / FAN5401 / FAN5402 / FAN5403 / FAN5404 / FAN5405 USB-Compliant Single-Cell Li-Ion Switching Charger with USB-OTG Boost Regulator Features Description The FAN5400 family (FAN540x) combines a highly integrated Fully Integrated, High-Efficiency Charger for Single-Cell switch-mode charger, to minimize single-cell Lithium-ion Li-Ion and Li-Polymer Battery Packs (Li-ion) charging time from a USB power source, and a boost Faster Charging than Linear regulator to power a USB peripheral from the battery. Charge Voltage Accuracy: 0.5% at 25C The charging parameters and operating modes are 2 1% from 0 to 125C programmable through an I C Interface that operates up to 3.4 Mbps. The charger and boost regulator circuits switch at 5% Input Current Regulation Accuracy 3 MHz to minimize the size of external passive components. 5% Charge Current Regulation Accuracy The FAN540X provides battery charging in three phases: 20 V Absolute Maximum Input Voltage conditioning, constant current, and constant voltage. 6 V Maximum Input Operating Voltage To ensure USB compliance and minimize charging time, the 2 input current is limited to the value set through the I C host. 1.25 A Maximum Charge Rate Charge termination is determined by a programmable 2 Programmable through High-Speed I C Interface minimum current level. A safety timer with reset control 2 (3.4 Mb/s) with Fast Mode Plus Compatibility provides a safety backup for the I C host. Input Current The integrated circuit (IC) automatically restarts the charge cycle when the battery falls below an internal threshold. If the Fast-Charge / Termination Current input source is removed, the IC enters a high-impedance Charger Voltage mode with leakage from the battery to the input prevented. 2 Charge status is reported back to the host through the I C Termination Enable port. Charge current is reduced when the die temperature 3 MHz Synchronous Buck PWM Controller with Wide reaches 120C. Duty Cycle Range The FAN540X can operate as a boost regulator on Small Footprint 1 H External Inductor command from the system. The boost regulator includes a soft-start that limits inrush current from the battery. Safety Timer with Reset Control The FAN540X is available in a 1.96 x 1.87 mm, 20-bump, 1.8 V Regulated Output from VBUS for Auxiliary Circuits 0.4 mm pitch, WLCSP package. Weak Input Sources Accommodated by Reducing Charging Current to Maintain Minimum VBUS Voltage L1 1H VBUS SW Low Reverse Leakage to Prevent Battery Drain to VBUS R 1F C 0.1 F SENSE C BUS OUT 5 V, 300 mA Boost Mode for USB OTG for 2.5 to 4.5 V PGND 68m PMID Battery Input Battery + CSIN 4.7 F C MID FAN540X VBAT Applications SDA C SCL BAT SYSTEM Cell Phones, Smart Phones, PDAs 10 F LOAD DISABLE VREG OTG/USB Tablet, Portable Media Players 1F C REG STAT Gaming Device, Digital Cameras Figure 1. Typical Application (FAN5403-05 Pin Out) All trademarks are the property of their respective owners. 2009 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5400 Family Rev. 1.10