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SP6641A Datasheet Preview

SP6641A Datasheet

500mA Alkaline DC/DC Boost Regulator in SOT-23

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® SP6641A/6641B
500mA Alkaline DC/DC Boost Regulator in SOT-23
s Ultra Low Quiescent Current: 10µA
s Wide Input Voltage Range: 0.9V to 4.5V
s 90mA IOUT at 1.3V Input (SP6641A-3.3V)
s 500mA IOUT at 2.6V Input (SP6641B-3.3V)
s 100mA IOUT at 2.0V Input (SP6641A-5.0V)
s 500mA IOUT at 3.3V Input (SP6641B-5.0V)
s Fixed 3.3V or 5.0V Output Voltage
s Up to 87% Efficiency
s 0.3NFET RDSon
s Startup Voltage Guaranteed at 0.9V
s 0.33A Inductor Current Limit (SP6641A)
s 1A Inductor Current Limit (SP6641B)
s Logic Shutdown Control
s SOT-23-5 Package
LX 1
GND 2
VOUT 3
SP6641
5 Pin SOT-23
5 VBATT
4 SHDN
APPLICATIONS
s PDA's
s DSC's
s CD/MP3 Players
s Pagers
s Digital Cameras
s Portable Handheld Medical Devices
DESCRIPTION
The SP6641 is an ultra-low quiescent current, high efficiency, DC-DC boost converter designed
for single and dual cell alkaline, or Li-ion battery applications found in PDA’s, MP3 players, and
other handheld portable devices. The SP6641 features a 10µA quiescent current, a 0.3N-
channel charging switch, 0.9V input startup, and a 0.33A or 1.0A inductor current limiting feature.
The SP6641 is offered in a 5 pin SOT-23 package and provides an extremely small power supply
footprint optimized for portable applications. The SP6641 is preset to 3.3V and can be controlled
by a 1nA active LOW shutdown pin.
D1
R1
C2
L1
1 LX
VBATT 5
®
2 GND U1
SP6641A
3 VOUT
4
SHDN
0.9V to 4.5V
VBATT
C1
SHDN
C3
VOUT
+3.3V or 5V
SP6641A 3.3V & 5V: C1 = C2 = 22µF Ceramic, L1 = 22µH CDRH5D28,
D1 = MBR0520, C3 = Open, R1 = Shorted.
SP6641B 3.3V & 5V: C1 = C2 = 100µF POSCAP, L1 = 10µH CDRH5D28,
D1 = ZHCS2000, C3 = 1µF Ceramic, R1 = 10.
Figure 1. Typical Application Schematic
700
650
600
550
500
450
400 SP6641B, 1.0A, 3.3V
350 SP6641B, 1.0A, 5V
300 SP6641A, 0.33A, 3.3V
250 SP6641A, 0.33A, 5V
200
150
100
50
0
1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5
VIN (V)
Figure 2. Maximum Load Current in Operation
Rev. 3/5/02, *Patent Pending
SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23
1
© Copyright 2002 Sipex Corporation




Sipex

SP6641A Datasheet Preview

SP6641A Datasheet

500mA Alkaline DC/DC Boost Regulator in SOT-23

No Preview Available !

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.
LX, VOUT, SHDN, VBATT to GND pin ....... -0.3 to 6.0V
LX Current .......................................................... 1.5A
Reverse VBATT Current ................................... 220mA
Storage Temperature ........................ -65°C to 150°C
Operating Temperature ..................... -40°C to +85°C
Lead Temperature (Soldering, 10 sec) .......... 300 °C
ELECTRICAL SPECIFICATIONS
VBATT = VSHDN = 1.3V, ILOAD = 0mA, -40°C <TA < +85°C, VOUT = +3.3V or +5.0V preset, typical values at 27°C
unless otherwise noted.
PARAMETER
Input Voltage Operating Range,
VBATT
Startup Voltage, VBATT
MIN
0.5
Output Voltage, VOUT
Quiescent Current into VOUT,
IQ(OUT)
Quiescent Current into VBATT,
IQB
Shutdown Current into VOUT,
ISHDN
Shutdown Current into VBATT,
ISHDN
Inductor Current Limit
(SP6641A)
Inductor Current Limit
(SP6641B)
Output Current (SP6641AEK-3.3)
3.16
4.80
280
850
Output Current (SP6641BEK-3.3)
Output Current (SP6641AEK-5.0)
Output Current (SP6641BEK-5.0)
Minimum Off-Time Constant
KOFF
NMOS Switch Resistance
SHDN Input Voltage
Vil
Vih
SHDN Input Current
80
TYP
0.85
3.30
5.00
10
250
1
20
330
1000
90
190
200
500
100
175
275
500
1.50
0.3
1
MAX UNITS CONDITIONS
4.5 V after startup
0.90 V RLOAD=3k, TA =27°C
1.00 V RLOAD=3k,-40°C <TA < +85°C
3.44 V 3.3V VOUT preset
5.20 V 5.0V VOUT preset
15 µA VOUT=3.5V, 3.3V VOUT preset
VOUT=5.5V, 5.0V VOUT preset
500 nA VOUT=3.5V, 3.3V VOUT preset
VOUT=5.5V, 5.0V VOUT preset
500 nA VSHDN =0V
100 nA VSHDN =0V
380 mA
1150 mA
0.75
20
100
mA
mA
mA
mA
mA
mA
mA
mA
V*µs
%
%
nA
VBATT =1.3V
VBATT =2.6V
VBATT =1.3V
VBATT =2.6V
VBATT =2.0V
VBATT =3.3V
VBATT =2.0V
VBATT =3.3V
TOFF KOFF / (VOUT – VIN)
Inmos=100mA
% of VBATT
% of VBATT
Rev. 3/5/02, *Patent Pending
SP6641A/6641B 500mA Alkaline DC/DC Boost Regulator in SOT-23
2
© Copyright 2002 Sipex Corporation


Part Number SP6641A
Description 500mA Alkaline DC/DC Boost Regulator in SOT-23
Maker Sipex
Total Page 13 Pages
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