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TC1264-3.0VDBTR

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20
TC1264
DS21375D-page 4 2010 Microchip Technology Inc.
2.0 TYPICAL PERFORMANCE CURVES
FIGURE 2-1: Line Regulation vs.
Temperature.
FIGURE 2-2: Output Noise vs. Frequency.
FIGURE 2-3: Load Regulation vs.
Temperature.
FIGURE 2-4: I
DD
vs. Temperature.
FIGURE 2-5: 3.0V Dropout Voltage vs.
I
LOAD
.
FIGURE 2-6: 3.0V V
OUT
vs.Temperature.
Note: The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
0.020
0.018
0.016
0.012
0.010
0.008
0.006
0.004
0.002
0.000
0.014
TEMPERATURE (°C)
LINE REGULATION (%)
-40°C 0°C 25°C 70°C 85°C 125°C
FREQUENCY (kHz)
NOISE (
μ
V/√Hz)
10.0
1.0
0.01
0.01 1
10
100 1000
0.1
0.0
R
LOAD
= 50Ω
C
OUT
= 1 μF
-40°C
0°C 25°C 70°C 85°C 125°C
0.0100
0.0090
0.0080
0.0070
0.0060
0.0050
0.0040
0.0030
0.0020
0.0010
0.0100
TEMPERATURE (°C)
LOAD REGULATION (%/mA)
1 mA to 800 mA
V
OUT
= 3V
TEMPERATURE (°C)
I
DD
(A)
150
135
120
105
90
75
60
45
30
15
0
-40°C 0°C 25°C 70°C 85°C 125°C
V
OUT
= 3V
0.600
0.550
0.500
0.450
0.400
0.350
0.300
0.250
0.200
0.150
0.100
0.050
0.000
0
100
200 300
400
500 600 700 800
I
LOAD
(mA)
DROPOUT VOLTAGE (V)
85°C
125°C
-40°C
0°C
25°C
70°C
3.030
3.020
3.010
3.000
2.990
2.980
2.970
2.960
2.950
2.940
2.930
2.920
TEMPERATURE (°C)
V
OUT
(V)
I
LOAD
= 0.1 mA
I
LOAD
= 300 mA
I
LOAD
= 500 mA
I
LOAD
= 800 mA
-40°C 0°C 25°C 70°C 85°C 125°C
2010 Microchip Technology Inc. DS21375D-page 5
TC1264
3.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 3-1.
TABLE 3-1: PIN FUNCTION TABLE
3.1 Unregulated Supply (V
IN
)
Unregulated supply input.
3.2 Ground (GND)
Ground terminal.
3.3 Regulated Output Voltage (V
OUT
)
Regulated voltage output.
Pin No.
3-Pin SOT-223
3-Pin TO-220
3-Pin DDPAK
Symbol Description
1V
IN
Unregulated supply input
2 GND Ground terminal
3V
OUT
Regulated voltage output
TC1264
DS21375D-page 6 2010 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, V
OUT
remains stable and within regulation over the entire
0mA to I
LOADMAX
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 V
OUT
to ground is required.
The output capacitor should have an effective series
resistance greater than 0.1 and less than 5. A 1 µF
capacitor should be connected from V
IN
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
V
IN
V
OUT
C
1
1µF
GND
V
OUT
V
IN
SHDN
+
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P20

TC1264-3.0VDBTR

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Buy TC1264-3.0VDBTR
Manufacturer:
Microchip Technology
Description:
LDO Voltage Regulators 800mA Fixed Output
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