SP6650
High Efficiency 600mA Synchronous Buck Regulator
August 2012
Rev. 2.0.0
GENERAL DESCRIPTION
APPLICATIONS
The SP6650 is ideal for portable applications
that use a Li-Ion or 3 to 4 cell
alkaline/NiCd/NiMH input. The SP6650 extends
battery life with it’s unique control loop
scheme (patent pending), which maintains
high efficiency levels (> than 90%) over a
wide range of output currents. Features such
as Inductor peak current control, protects the
power supply from overload or short circuit
conditions, controls the startup current to
prevent output overshoot and excessive
battery drop, and gives the user more
flexibility in choosing an appropriate coil to
optimize solution cost, size and performance.
Other features include a dedicated pin for
manual shutdown, a battery low indicator, and
thermal protection.
The SP6650 is offered in a RoHS compliant,
lead free 10-pin MSOP package.
PDA
CD Player
ADSL Modem
Digital Still Camera
FEATURES
95% High Efficiency
Proprietary Control Loop
2.7V to 6.5V Input Voltage Range
3.3V or Adjustable Output Voltage
Range
2% Output Voltage Accuracy
600mA Output Current
100% Duty Cycle Operation
Programmable Inductor Peak Current
Limit (0.95A or 0.5A)
No External FET's Required
3V Battery Low Indicator
2.7V Undervoltage Lockout
Shutdown Control
Small 10-Pin MSOP
TYPICAL APPLICATION DIAGRAM
Fig. 1: SP6650 Application Diagram
Exar Corporation
48720 Kato Road, Fremont CA 94538, USA
www.exar.com
Tel. +1 510 668-7000 – Fax. +1 510 668-7001
