FAN5665 High-Efficiency, Adaptive Charge Pump 5V Boost February 2008 FAN5665 High-Efficiency, Adaptive Charge Pump 5V Boost Features Description The FAN5665 is a 5V switched capacitor step-up 5V Fixed Output Voltage DC/DC converter with an input voltage range from 2.9V 30mA Maximum Output Current to 5.5V. Switch reconfiguration and fractional switching techniques are utilized to achieve high efficiency over Built-in Charge Pump with Three Modes of the entire input voltage range. Operation: 1, 1.5, and 2 The FAN5665 includes built-in under-voltage lockout, Minimum External Components short circuit, and thermal protection circuitry. Flying Capacitors Only 0.22F The FAN5665 is available in an 8-bump 0.4mm pitch Low-noise, Constant-frequency Operation (1.2MHz) WLCSP package. at Heavy Loads High-efficiency, Low-frequency Operation at Light Loads Low Quiescent Current C1- GND EN Up to 92% Efficiency C1 2.9V to 5.5V Input Voltage Range +2.9 to 5.5V 0.22F VIN C1+ Soft-start for Limiting Inrush Current C IN Input Under-Voltage Lockout Protection (UVLO) 2.2F +5V C2+ C2- VOUT Short-Circuit Protection (SCP) C OUT Thermal Shutdown Protection (TSD) 2.2F 8-bump 1.21 x 1.21mm, 0.4mm Pitch WLCSP C2 0.22F Applications USB I/O Supply Regulators Figure 1. Typical Application Cell Phones, Smart-Phones Pocket PCs PDA, DSC, PMP, and MP3 Players Ordering Information Part Number Operating Temperature Range Package Packing Method 8-Lead Wafer-Level Chip-Scale FAN5665UCX -40C to +85C Tape and Reel Package (WLCSP), 1.21x1.21mm All packages are lead free per JEDEC: J-STD-020B standard. 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5665 Rev. 1.0.1 FAN5665 High-Efficiency, Adaptive Charge Pump 5V Boost Pin Configuration Figure 2. Pin Configuration Pin Definitions Pin Name Description A1 C1- Bucket capacitor 1. Connect this pin to the negative terminal of the bucket (flying) capacitor. A2 GND Ground. Enable. Enables the IC when high. Disables the IC when low and enters shutdown mode. A3 EN No internal pull-up or pull-down this pin should not be left floating. B1 C1+ Bucket capacitor 1. Connect this pin to the positive terminal of the bucket (flying) capacitor. B3 VIN Power input. C1 VOUT Regulated 5V output. C2 C2+ Bucket capacitor 2. Connect this pin to the positive terminal of the bucket (flying) capacitor. C3 C2- Bucket capacitor 2. Connect this pin to the negative terminal of the bucket (flying) capacitor. 2007 Fairchild Semiconductor Corporation www.fairchildsemi.com FAN5665 Rev. 1.0.1 2