SP6655
SP6655 is High Efficiency 400mA Synchronous Buck Regulator manufactured by Exar.
DESCRIPTION
The SP6655 is a 400m A synchronous buck regulator which is ideal for portable applications that use a Li-Ion or 3 cell alkaline/Ni CD/Ni MH input. The SP6655’s proprietary control loop, 20μA light load quiescent current, and 0.3Ω power switches provide excellent efficiency across a wide range of output currents. As the input battery supply decreases towards the output voltage, the SP6655 seamlessly transitions into 100% duty ratio operation, further extending useful battery life. The SP6655 is protected against overload and short circuit conditions with a precise inductor peak current limit. Other features include programmable under voltage lockout and low battery detection, externally programmed output voltage down to 1.0V, logic level shutdown control, and 140°C over temperature shutdown.
APPLICATIONS
- Cell Phones
- PDA's
- MP3 Players
- USB Devices
Rev. 2.0.0
FEATURES
- 98% Efficiency Possible
- Small 10-Pin DFN Package
- Ultra-low 20μA Quiescent Current
- 625m A Inductor Peak Current Limit
- Guaranteed Minimum 400m A Output
- Current
- 2.7V to 5.5V Input Voltage Range
- Output Adjustable Down to 1.0V
- 100% Duty Ratio Low Dropout
Operation
- 80μA Light Load Quiescent Current in
Dropout
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP6655 Application Diagram
Exar Corporation 48720 Kato Road, Fremont CA 94538, USA
.exar. Tel. +1 510 668-7000
- Fax. +1 510 668-7001
High Efficiency 400m A Synchronous Buck Regulator
ABSOLUTE MAXIMUM RATINGS
These are stress ratings only and functional operation of the device at these ratings or any other above those indicated in the operation sections of the specifications below is not implied. Exposure to absolute maximum rating conditions for extended periods of time may affect reliability.
PVIN,VIN 6V All other pins -0.3V to VIN+0.3V PVIN, PGND, LX current 2A...
