FAN5665 Datasheet, PDF (1/15 Pages) Fairchild Semiconductor – High-Efficiency, Adaptive Charge Pump 5V Boost

October 2007
FAN5665
High-Efficiency, Adaptive Charge Pump 5V Boost
Features
ƒ 5V Fixed Output Voltage
ƒ 30mA Maximum Output Current
ƒ Built-in Charge Pump with Three Modes of
Operation: 1×, 1.5×, and 2×
ƒ Minimum External Components
ƒ Flying Capacitors Only 0.22µF
ƒ Low-noise, Constant-frequency Operation (1.2MHz)
at Heavy Loads
ƒ High-efficiency, Low-frequency Operation at Light
Loads
ƒ Low Quiescent Current
ƒ Up to 92% Efficiency
ƒ 2.9V to 5.5V Input Voltage Range
ƒ Soft-start for Limiting Inrush Current
ƒ Input Under-Voltage Lockout Protection (UVLO)
ƒ Short-Circuit Protection (SCP)
ƒ Thermal Shutdown Protection (TSD)
ƒ 8-bump 1.21 x 1.21mm, 0.4mm Pitch WLCSP
Applications
ƒ USB I/O Supply Regulators
ƒ Cell Phones, Smart-Phones
ƒ Pocket PCs
ƒ PDA, DSC, PMP, and MP3 Players
Description
The FAN5665 is a 5V switched capacitor step-up
DC/DC converter with an input voltage range from 2.9V
to 5.5V. Switch reconfiguration and fractional switching
techniques are utilized to achieve high efficiency over
the entire input voltage range.
The FAN5665 includes built-in under-voltage lockout,
short circuit, and thermal protection circuitry.
The FAN5665 is available in an 8-bump 0.4mm pitch
WLCSP package.
C1
0.22µF
C1 -
GND
EN
C1 +
VIN
+5V
C_OUT
2.2µF
VOUT
C2+
C2-
C2
0.22µF
+2.9 to 5.5V
C_IN
2.2µF
Figure 1. Typical Application
Ordering Information
Part Number Operating Temperature Range
Package
FAN5665UCX
-40°C to +85°C
8-Lead Wafer-Level Chip-Scale
Package (WLCSP), 1.21x1.21mm
All packages are lead free per JEDEC: J-STD-020B standard.
Packing Method
Tape and Reel
© 2007 Fairchild Semiconductor Corporation
FAN5665 • Rev. 1.0.0
www.fairchildsemi.com