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SS6638-45GUTR датащи(PDF) 1 Page - Silicon Standard Corp.

номер детали SS6638-45GUTR
подробное описание детали  Simple 3-Pin Step-Up DC/DC Converter
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производитель  SSC [Silicon Standard Corp.]
домашняя страница  http://www.siliconstandard.com
Logo SSC - Silicon Standard Corp.

SS6638-45GUTR датащи(HTML) 1 Page - Silicon Standard Corp.

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SS6638G
8/21/2005 Rev.2.3
Simple 3-Pin Step-Up DC/DC Converter
FEATURES
DESCRIPTION
Guaranteed start-up from less than 0.9 V.
High efficiency.
Low quiescent current.
Fewer external components needed.
Low ripple and low noise.
Fixed output voltage: 2.7V, 3.0V, 3.3V, 4.5V
and 5V.
Space saving packages: SOT-23, SOT-89
and TO-92.
APPLICATIONS
Pagers.
Cameras.
Wireless Microphones.
Pocket Organizers.
Battery Backup Supplies.
Portable Instruments.
The SS6638G is a high-efficiency step-up DC/DC
converter for applications using 1 to 4 NiMH
battery cells. Only three external components are
required to deliver a fixed output voltage of 2.7V,
3.0V, 3.3V, 4.5V or 5V. The SS6638G starts up
from less than 0.9V input with 1mA load. A Pulse
Frequency Modulation scheme brings optimized
performance for applications with light output
loading and low input voltages. The output ripple
and noise are lower compared with circuits
operating in PSM mode.
The PFM control circuit operating at a maximum
100kHz switching rate results in smaller passive
components. The space saving SOT-23, SOT-89
and TO-92 packages make the SS6638G an ideal
choice of DC/DC converter for space-conscious
applications, like pagers, electronic cameras, and
wireless microphones.
TYPICAL APPLICATION CIRCUIT
D1
SS12
VOUT
SW
GND
SS6638-27G
SS6638-30G
SS6638-33G
SS6638-45G
SS6638-50G
C2
47
µF
+
VOUT
L1
100
µH
VIN
+
C1
22
µF
Simple Step-Up DC/DC Converter
Pb-free, RoHS compliant.


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