FAN4860: 3MHz Synchronous TinyBoost™

The FAN4860 is a low-power boost regulator designed to provide a regulated 3.3 V, 5.0 V or 5.4 V output from a single cell Lithium or Li-Ion battery. Output voltage options are fixed at 3.3 V, 5.0 V, or 5.4 V with a guaranteed maximum load current of 200 mA at VIN=2.3 V and 300 mA at VIN=3.3 V. Input current in Shutdown Mode is less than 1 µA, which maximizes battery life.

Light-load PFM operation is automatic and “glitch-free”. The regulator maintains output regulation at no-load with as low as 37 µA quiescent current.

The combination of built-in power transistors, synchronous rectification, and low supply current make the FAN4860 ideal for battery powered applications.

The FAN4860 is available in 6-bump 0.4 mm pitch Wafer-Level Chip Scale Package (WLCSP) and a 6-lead 2x2 mm ultra-thin MLP package.

Features

• Operates with Few External Components: 1 µH Inductor and 0402 Case Size Input and Output Capacitors
• Input Voltage Range from 2.3 V to 5.4 V
• Fixed 3.3 V, 5.0 V, or 5.4 V Output Voltage Options
• Maximum Load Current >150 mA at V_IN=2.3 V
• Maximum Load Current 300 mA at V_IN=3.3 V, V_OUT=5.4 V
• Maximum Load Current 300 mA at V_IN=3.3 V, V_OUT=5.0 V
• Maximum Load Current 300 mA at V_IN=2.7 V, V_OUT=3.3 V
• Up to 92% Efficient
• Low Operating Quiescent Current
• True Load Disconnect During Shutdown
• Variable On-time Pulse Frequency Modulation (PFM) with Light-Load Power-Saving Mode
• Internal Synchronous Rectifier (No External Diode Needed)
• Thermal Shutdown and Overload Protection
• 6-Pin 2 x 2 mm UMLP
• 6-Bump WLCSP, 0.4 mm Pitch