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ST5R50U Datasheet

  • ST5R50U

  • MICROPOWER VFM STEP-UP DC/DC CONVERTER

  • 681.42KB

  • 15頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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ST5R00
SERIES
MICROPOWER VFM STEP-UP DC/DC CONVERTER
I
I
I
I
I
I
I
I
I
I
VERY LOW SUPPLY CURRENT
REGULATED OUTPUT VOLTAGE
WIDE RANGE OF OUTPUT VOLTAGE
AVAILABLE (2.5V, 2.8V, 3.0V, 3.3V, 5.0V)
OUTPUT VOLTAGE ACCURACY 鹵5%
OUTPUT CURRENT UP TO 100mA
LOW RIPPLE AND LOW NOISE
VERY LOW START-UP VOLTAGE
HIGH EFFICIENCY (V
OUT
= 5V TYP. 87%)
FEW EXTERNAL COMPONENTS
VERY SMALL PACKAGE: SOT23-5L
SOT23-5L
DESCRIPTION
The ST5R00 is an high efficiency VFM Step-up
DC/DC converter for small, low input voltage or
battery powered systems with ultra low quiescent
supply current. The ST5Rxx accept a positive
input voltage from start-up voltage to V
OUT
and
convert it to a higher output voltage in the 2.5 to
5V range.
The ST5R00 combine ultra low quiescent supply
current and high efficiency to give maximum
battery life. The high switching frequency and the
internally limited peak inductor current, permits
the use of small, low cost inductors. Only three
external components are needed: an inductor a
diode and an output capacitor.
The ST5R00 is suitable to be used in a battery
powered equipment where low noise, low ripple
and ultra low supply current are required. The
ST5R00 is available in very small packages:
SOT23-5L.
Typical applications are pagers, cameras & video
camera, cellular telephones, wireless telephones,
palmtop computer, battery backup supplies,
battery powered equipment.
Figure 1: Schematic Diagram
June 2005
Rev. 6
1/15

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