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TC1264 Scheda tecnica(PDF) 3 Page - Microchip Technology

Il numero della parte TC1264
Spiegazioni elettronici  800mA Fixed Output CMOS LDO
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
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© 2002 Microchip Technology Inc.
DS21375B-page 3
TC1264
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
PIN FUNCTION TABLE
3.0
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 3-1 shows a typical application circuit.
FIGURE 3-1:
TYPICAL APPLICATION
CIRCUIT
3.1
Output Capacitor
A1
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 1µF
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.
Pin No.
(3-Pin SOT-223)
(3-Pin TO-220)
(3-Pin DDPAK)
Symbol
Description
1VIN
Unregulated supply input.
2
GND
Ground terminal.
3VOUT
Regulated voltage output.
C1
1
µF
Battery
TC1264
VIN
VOUT
C2
1
µF
GND
VOUT
+
+
+


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