ST1638 Datasheet, PDF (1/7 Pages) Stanson Technology – Step-Up DC/DC Converter High Efficiency PFM

Step-Up DC/DC Converter
High Efficiency PFM
ST1638
DESCRIPTION
The ST1638 is a high efficiency PFM step-up DC/DC converter for application using
battery powered devices. Only three external components are required to construct a low ripple,
high efficiency converter. ST1638 can start up from 0.9V input voltage with 1mA load.
The space saving SOT-89 and SOT-23 packages make ST1638 an ideal choice for spce
conscious applications.
PIN CONFIGURATION
SOT-23-3L
SOT-89
VOUT
GND SW
GND VOUT SW
APPLICATIONS
Battery Powered Devices
Camera
PDA
Hand Held Communication Equipment
Camcoder
Power Source for Applications which
Require Higher Voltage than Batteries
can Provide
PART MARKING
SOT-23-3L
SOP-89
638YA
Y Year
A Day Code
S1638
YW
Y Year
A Day Code
FEATURES
Larger than 85% Efficiency
Low Startup Voltage, 0.9V at 1mA
Low Ripple and Low Noise
Low Quiescent Current
Minimum Number of External
Components
SOT-89 and SOT-23 Small Package
STANSON TECHNOLOGY
120 Bentley Square, Mountain View, Ca 94040 USA
TEL: [phone] FAX: [phone]
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