FAN48623: 2500 mA, Synchronous TinyBoost® Regulator with Bypass Mode

The FAN48623 allows systems to take advantage of new battery chemistries that can supply significant energy when the battery voltage is lower than the required voltage for system power ICs. By combining built-in power transistors, synchronous rectification, and low supply current, this IC provides a compact solution for systems using advanced Li-Ion battery chemistries.

The FAN48623 is a boost regulator designed to provide a minimum output voltage from a single-cell Li-Ion battery, even when the battery voltage is below system minimum. The output voltage regulation is guaranteed up to a maximum load current of 2500 mA. The regulator transitions smoothly between Bypass and normal Boost Mode. The device can be forced into Bypass Mode to reduce quiescent current.

The FAN48623 is available in a 16-bump, 0.4 mm pitch, Wafer-Level Chip-Scale Package (WLCSP).

Features

• Maximum Continuous Load Current: 2500 mA at V_IN of 2.5 V Boosting V_OUT to 3.3 V
• Maximum Pulse Load Current of 3.5 A for GSM PAs (1 Slot) and PMIC support simultaneously, V_IN=3.1 V, V_OUT=3.4 V
• Up to 97% Efficient
• 4 External Components: 2520 case 0.47 µH Inductor and 0603 Case Size Input and Output Capacitors
• Input Voltage Range: 2.5 V to 5.5 V
• Fixed Output Voltage Options: 3.0 V to 5.0 V
• True Bypass Operatin when V_IN > Target V_OUT
• Integrated Synchronous Rectifier
• True Load Disconnect
• Forced Bypass Mode
• V_SEL Control to Optimize Target V_OUT
• Short-Circuit Protection (SCP)
• Low Operating Quiescient Current
• 16-Bump, 1.81mm x 1.81mm, 0.4mm Pitch, WLCSP