Synchronous Regulator, TINYBOOST , 3 MHz FAN4860 Description The FAN4860 is a lowpower boost regulator designed to provide a regulated 3.3 V, 5.0 V or 5.4 V output from a single cell Lithium or www.onsemi.com LiIon 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 V = 2.3 V and 300 mA at V = 3.3 V. Input current in Shutdown IN IN Mode is less than 1 A, which maximizes battery life. Lightload PFM operation is automatic and glitchfree. The regulator maintains output regulation at noload with as low as 37 A quiescent current. The combination of built in power transistors, synchronous UDFN6 2 x 2, 0.65P rectification, and low supply current make the FAN4860 ideal for CASE 517DS battery powered applications. The FAN4860 is available in 6bump 0.4 mm pitch WaferLevel Chip Scale Package (WLCSP) and a 6lead 2 x 2 mm ultrathin MLP package. Features Operates with Few External Components: WLCSP6 1.23 x 0.88 x 0.586 1 H Inductor and 0402 Case Size Input and Output Capacitors CASE 567RP 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 = 2.3 V IN ORDERING INFORMATION Maximum Load Current 300 mA at V = 3.3 V, V = 5.4 V IN OUT See detailed ordering and shipping information on page 2 of this data sheet. Maximum Load Current 300 mA at V = 3.3 V, V = 5.0 V IN OUT Maximum Load Current 300 mA at V = 2.7 V, V = 3.3 V IN OUT Up to 92% Efficient TYPICAL APPLICATION Low Operating Quiescent Current True Load Disconnect During Shutdown V IN C 2.2 F Variable Ontime Pulse Frequency Modulation (PFM) with IN LightLoad PowerSaving Mode Internal Synchronous Rectifier VIN GND A1 A2 (No External Diode Needed) L1 SW VOUT B1 B2 Thermal Shutdown and Overload Protection 1 H EN FB 6Pin 2 2 mm UMLP C C1 C2 OUT 6Bump WLCSP, 0.4 mm Pitch 4.7 F Applications USB On the Go 5 V Supply 5 V Supply HDMI, HBridge Motor Drivers Powering 3.3 V Core Rails PDAs, Portable Media Players Cell Phones, Smart Phones, Portable Instruments Semiconductor Components Industries, LLC, 2010 1 Publication Order Number: August, 2020 Rev. 4 FAN4860/DFAN4860 Table 1. ORDERING INFORMATION Part Number Operating Temperature Range Package Packing Method FAN4860UC5X 40C to 85C WLCSP, 0.4 mm Pitch Tape and Reel FAN4860UMP5X 40C to 85C UMLP6, 2 x 2 mm Tape and Reel FAN4860UC33X* 40C to 85C WLCSP, 0.4 mm Pitch Tape and Reel FAN4860UC54X* 40C to 85C WLCSP, 0.4 mm Pitch Tape and Reel *This device is End of Life. Please contact sales for additional information and assistance with replacement devices. BLOCK DIAGRAMS Q3Q3 L1L1 SWSW VOUTVOUT Q2Q2 VINVIN V Q1Q1 IN SynchronousSynchronous C IN RectifierRectifier ControlControl GNDGND ENEN FBFB Modulator LogicModulator Logic and Controland Control C OUT Figure 1. IC Block Diagram PIN CONFIGURATIONS GND 1 6 VIN A1 A2 VIN GND GND A2 A1 VIN P1 2 5 VOUT SW (GND) SW B1 B2 VOUT VOUT B2 B1 SW 3 4 EN FB FB C2 C1 EN C1 C2 FB EN Figure 2. WLCSP (Top View) Figure 3. WLCSP (Bottom View) Figure 4. 2 2 mm UMLP (Top View) www.onsemi.com 2