SSPP66665500
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August 2012 Rev. 2.0.0
GENERAL DESCRIPTION APPLICATIONS
The SP6650 is ideal for portable applications PDA
that use a Li-Ion or 3 to 4 cell
CD Player
alkaline/NiCd/NiMH input. The SP6650 extends
battery life with its unique control loop ADSL Modem
scheme (patent pending), which maintains
Digital Still Camera
high efficiency levels (> than 90%) over a
wide range of output currents. Features such
as Inductor peak current control, protects the FEATURES
power supply from overload or short circuit
95% High Efficiency
conditions, controls the startup current to
prevent output overshoot and excessive Proprietary Control Loop
battery drop, and gives the user more
2.7V to 6.5V Input Voltage Range
flexibility in choosing an appropriate coil to
3.3V or Adjustable Output Voltage
optimize solution cost, size and performance.
Range
Other features include a dedicated pin for
manual shutdown, a battery low indicator, and
2% Output Voltage Accuracy
thermal protection.
600mA Output Current
The SP6650 is offered in a RoHS compliant,
100% Duty Cycle Operation
lead free 10-pin MSOP package.
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 www.exar.com
48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 Fax. +1 510 668-7001 SSPP66665500
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ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS
These are stress ratings only and functional operation of Input Voltage Range V ............................. UVLO to 6.5V
IN
the device at these ratings or any other above those
Ambient Temperature ............................. -40C to +85C
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.
PV , V ............................................................... 7.0V
IN IN
All Other Pins ..................................... -0.3V to V +0.3V
IN
PV , PGND, LX Current ............................................. 2A
IN
Storage Temperature .............................. -65C to 150C
ELECTRICAL SPECIFICATIONS
Specifications with standard type are for an Operating Junction Temperature of T = 25C only; limits applying over the full
J
Operating Junction Temperature range are denoted by a . Minimum and Maximum limits are guaranteed through test,
design, or statistical correlation. Typical values represent the most likely parametric norm at T = 25C, and are provided for
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reference purposes only. Unless otherwise indicated, V = 3.6V, V = 3.3V, I = SHDN = V , FB = GND, L = 22H, C
IN OUT LIM IN 1 IN
= C = 47F, T = 40C to 85C.
OUT A
Parameter Min. Typ. Max. Units Conditions
Input Voltage Operating Range UVLO 6.5 V
Undervoltage Lockout Threshold 2.6 2.7 2.8 V V Rising
IN
Undervoltage Lockout Hysteresis 120 mV
FB Set Voltage, V 1.25 1.27 V V tied to FB Pin
REF 1.23 OUT
ILOAD = 0 to 600mA
V Load Regulation 0.5 %
REF
V = 3.6V, V = 3.3V
IN OUT
V = 3.6V to 6.5V
IN
V Line Regulation 0.5 %
REF
V = 3.3V, I = 200mA
OUT LOAD
V = 3.6V to 6.5V
IN
V Line and Load Regulation 0.65 %
REF
I = 0 to 600mA
LOAD
V Accuracy 3.30 3.37 V I = 100mA, V = 3.6V
OUT 3.23 LOAD IN
V = 3.6V to 6.5V
IN
V Line and Load Regulation 3.30 3.43 V
OUT 3.17
I = 0 to 600mA
LOAD
On-Time Constant - K
ON
2.7 s*V
Minimum T = K / (V -V )
ON ON IN OUT
PMOS Switch Resistance 0.4 0.8 I = 200mA
PMOS
NMOS Switch Resistance 0.3 0.8 I = 200mA
NMOS
V Pin Quiescent Current 70 150 A SHDN = V = FB = 1.5V
IN IN
V Pin Shutdown Current 0.3 500 nA SHDN = 0V
IN
V Pin Quiescent Current 7 12 A SHDN = V = FB = 1.5V
OUT IN
V Pin Shutdown Current 0.1 500 nA SHDN = 0V
OUT
92 % I = 600mA
LOAD
Power Efficiency 95 % I = 100mA
LOAD
88 % I = 1mA
LOAD
Minimum Guaranteed Load I = V
600 700 mA LIM IN
Current 350 mA I = 0V
300 LIM
0.95 1.15 A I = V
0.75 LIM IN
Inductor Current Limit
0.50 0.60 A I = 0V
0.40 LIM
Inductor Current Limit -100 ppm/ C
Falling BLON Trip Voltage 2.88 3.00 3.12 V
BLON Trip Voltage Hysteresis 2.9 %
V = V = 3.0V,
IN OUT
BLON Low Output Voltage 0.4 V
I = 1mA
SINK
BLON Leakage Current 1 A V = 3.3V
BLON
2012 Exar Corporation 2/17 Rev. 2.0.0