SS8051 Datasheet, PDF (1/9 Pages) Silicon Standard Corp. – Micro-Power Step-up DC/DC Converter

SS8051
Micro-Power Step-up DC/DC Converter
FEATURES
Configurable output voltage up to 28V
Quiescent current of 20µA
Shutdown current <1µA
Shutdown-pin current <1µA
Supply range from 2.5V to 6.5V
Low V_DS(on): 250mV (I_SW=300mA)
Tiny SOT23-5 package
APPLICATIONS
STN/TFT LCD Bias
Personal Digital Assistants (PDAs)
Handheld Computers
Digital Still Cameras
Cellular Phones
WebPad
White LED Driver
Local 3V to 5V Conversion
DESCRIPTION
The SS8051 boost converter is designed for small to
medium size LCD panels requiring high bias voltages.
With a typical quiescent current of 20µA and a supply
voltage range of 2.5V to 6.5V, it is suitable for battery
powered portable applications, such as PDAs and
handheld computers. When the SS8051 goes into
shutdown mode, it consumes less than 1µA.
Furthermore, with a 350mA current limit, 500ns fixed
minimum off-time and tiny SOT23-5 package, the
SS8051 can be used with smaller inductors and other
surface-mount components to minimize the required PCB
footprint in space-conscious applications.
To control the SS8051, no other external current is
needed for the shutdown pin, which typically consumes
less than 1µA over the full supply range.
TYPICAL APPLICATION CIRCUIT
2.5V – 4.2V
4.7µF
10uH
VCC
SW
SS8051
SHDN
FB
GND
20V
12mA
1M
1µF
62k
Rev.2.01 6/06/2003
www.SiliconStandard.com
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