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TC1264-3.0VDBTR データシート(PDF) 6 Page - Microchip Technology

部品番号 TC1264-3.0VDBTR
部品情報  800 mA Fixed-Output CMOS LDO with Shutdown
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メーカー  MICROCHIP [Microchip Technology]
ホームページ  http://www.microchip.com
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TC1264-3.0VDBTR データシート(HTML) 6 Page - Microchip Technology

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TC1264
DS21375C-page 6
© 2006 Microchip Technology Inc.
4.0
DETAILED DESCRIPTION
The TC1264 is a precision, fixed output LDO. Unlike
bipolar regulators, the TC1264’s supply current does
not increase with load current. In addition, VOUT
remains stable and within regulation over the entire
0mA to ILOADMAX load current range (an important
consideration in RTC and CMOS RAM battery back-up
applications).
Figure 4-1 shows a typical application circuit.
FIGURE 4-1:
TYPICAL APPLICATION
CIRCUIT
4.1
Output Capacitor
A 1 µF (min) capacitor from VOUT to ground is required.
The output capacitor should have an effective series
resistance greater than 0.1
Ω and less than 5Ω. A 1 µF
capacitor should be connected from VIN to GND if there
is more than 10 inches of wire between the regulator
and the AC filter capacitor, or if a battery is used as the
power source. Aluminum electrolytic or tantalum
capacitor types can be used. (Since many aluminum
electrolytic capacitors freeze at approximately -30°C,
solid tantalums are recommended for applications
operating below -25°C.) When operating from sources
other than batteries, supply-noise rejection and
transient response can be improved by increasing the
value of the input and output capacitors and employing
passive filtering techniques.
TC1264
VIN
VOUT
C1
1µF
GND
VOUT
VIN
SHDN
+


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