TC1263-3.3VOA Microchip Technology, TC1263-3.3VOA Datasheet - Page 4

• Manufacturer Part Number: TC1263-3.3VOA
• Description: IC REG LDO 3.3V 500MA 8SOIC
• Manufacturer: Microchip Technology

Specifications of TC1263-3.3VOA

• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 0.35V @ 500mA
• Number Of Regulators: 1
• Current - Output: 500mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 650 mV
• Output Current: 500 mA
• Line Regulation: 0.05 %
• Load Regulation: 0.002 % / mA
• Voltage Regulation Accuracy: 0.5 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: TC12633.3VOA

TC1263
DS21374B-page 4
3.0
The TC1263 is a precision, fixed output LDO. Unlike
bipolar regulators, the TC1263’s supply current does
not increase with load current. In addition, V
remains stable and within regulation over the entire
0mA to I
consideration in RTC and CMOS RAM battery back-up
applications).
Figure 3-1 shows a typical application circuit.
FIGURE 3-1:
3.1
A 1µF (min) capacitor from V
The output capacitor should have an effective series
resistance greater than 0.1Ω and less than 5Ω, and a
resonant frequency above 1MHz. A 1µF capacitor
should be connected from V
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,
response can be improved by increasing the value of
the input and output capacitors and employing passive
filtering techniques.
(to CMOS Logic or Tie
Shutdown Control
to V
IN
if unused)
+
Battery
DETAILED DESCRIPTION
Output Capacitor
LOAD
supply-noise
+
1µF
C2
MAX
Processor RESET Signal
if ERROR is used as a
load current range (an important
GND
C3 Required Only
SHDN
V
IN
(See Text)
TYPICAL APPLICATION
CIRCUIT
TC1263
rejection
ERROR
IN
OUT
V
OUT
to GND if there is more
to ground is required.
C3
V
+
+
and
+
1µF
C1
R1
1M
0.2µF
V
transient
OUT
BATTLOW
or RESET
OUT
3.2
ERROR is driven low whenever V
regulation by more than – 5% (typical). This condition
may be caused by low input voltage, output current
limiting, or thermal limiting. The ERROR threshold is
5% below rated V
output voltage value (e.g., ERROR = V
(typ.) for a 5.0V regulator and 2.85V (typ.) for a 3.0V
regulator). ERROR output operation is shown in
Figure 3-2.
Note that ERROR is active when V
V
As shown in Figure 3-1, ERROR can be used as a
battery low flag, or as a processor RESET signal (with
the addition of timing capacitor C3). R1 x C3 should be
chosen to maintain ERROR below V
RESET input for at least 200 msec to allow time for the
system to stabilize. Pull-up resistor R1 can be tied to
V
FIGURE 3-2:
OUT
TH
ERROR
V
, and inactive when V
V
OUT
V
V
OL
, V
TH
IH
IN
ERROR Output
or any other voltage less than (V
OUT
©
2002 Microchip Technology Inc.
ERROR OUTPUT
OPERATION
regardless of the programmed
OUT
is above V
OUT
IH
OUT
of the processor
HYSTERESIS (V
TH
is at or below
OL
falls out of
IN
+ V
+ 0.3V).
at 4.75V
H
.
H
)