TC2055-2.85VCTTR Microchip Technology, TC2055-2.85VCTTR Datasheet - Page 4

• Manufacturer Part Number: TC2055-2.85VCTTR
• Description: IC CMOS LDO 2.85V 100MA SOT23A-5
• Manufacturer: Microchip Technology

Specifications of TC2055-2.85VCTTR

• Regulator Topology: Positive Fixed
• Voltage - Output: 2.85V
• Voltage - Input: Up to 6V
• Voltage - Dropout (typical): 0.09V @ 100mA
• Number Of Regulators: 1
• Current - Output: 100mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: SOT-23-5, SC-74A, SOT-25
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 6 V
• Output Voltage: 2.85 V
• Output Type: Fixed
• Dropout Voltage (max): 140 mV
• Output Current: 100 mA
• Line Regulation: 0.05 %
• Load Regulation: 0.5 %
• Voltage Regulation Accuracy: 0.4 %
• 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: TC20552.85VCTTR

TC2054/2055/2186
3.0
The TC2054, TC2055 and TC2186 are precision fixed
output voltage regulators. (If an adjustable version is
desired, please see the TC1070, TC1071 or TC1187
data sheets.) Unlike bipolar regulators, the TC2054,
TC2055 and TC2186 supply current does not increase
with load current. In addition, V
within regulation over the entire 0mA to maximum out-
put current operating load range.
Figure 3-1 shows a typical application circuit. The reg-
ulator is enabled any time the shutdown input (SHDN)
is at or above V
SHDN is at or below V
CMOS logic gate, or I/O port of a microcontroller. If the
SHDN input is not required, it should be connected
directly to the input supply. While in shutdown, supply
current decreases to 0.05µA (typical), V
zero volts, and ERROR is open-circuited.
FIGURE 3-1:
3.1
ERROR is driven low whenever V
lation 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
age value (e.g. ERROR = V
regulator and 2.85V (typ.) for a 3.0V regulator).
ERROR output operation is shown in Figure 4-2.
Note that ERROR is active when V
inactive when V
As shown in Figure 3-1, ERROR can be used as a bat-
tery low flag or as a processor RESET signal (with the
addition of timing capacitor C2). R1 x C2 should be
chosen to maintain ERROR below V
RESET input for at least 200msec to allow time for the
system to stabilize. Pull-up resistor R1 can be tied to
V
The ERROR pin sink current is self-limiting to approxi-
mately 18mA.
DS21663B-page 4
(to CMOS Logic or Tie
OUT
Shutdown Control
to V
, V
IN
if unused)
OUT
IN
BATTERY
DETAILED DESCRIPTION
ERROR Open Drain Output
or any other voltage less than (V
regardless of the programmed output volt-
1µF
TYPICAL APPLICATION CIRCUIT
OUT
IH
Processor RESET Signal
GND
if ERROR is used as a
SHDN
V
, and shutdown (disabled) when
rises above V
IN
C2 Required Only
IL
(See Text)
. SHDN may be controlled by a
TC2054
TC2055
TC2186
OL
ERROR
V
at 4.75V (typ.) for a 5.0V
OUT
OUT
OUT
TH
OUT
remains stable and
IH
by V
V
falls out of regu-
of the processor
falls to V
+
1µF
C1
R1
1M
0.2µF
C2
HYS
OUT
IN
.
V
+ 0.3V).
OUT
BATTLOW
or RESET
TH
falls to
, and
FIGURE 3-2:
3.2
A 1µF (min) capacitor from V
The output capacitor should have an effective series
resistance of 0.01Ω. to 5Ω for V
to 5Ω for V
nected from V
of wire between the regulator and the AC filter capaci-
tor, or if a battery is used as the power source. Ceramic,
tantalum and aluminum electrolytic capacitors can be
used. (Since many aluminum electrolytic capacitors
freeze at approximately -30°C, solid tantalums are rec-
ommended for applications operating below -25°C).
When operating from sources other than batteries, sup-
ply-noise rejection and transient response can be
improved by increasing the value of the input and out-
put capacitors and employing passive filtering tech-
niques.
ERROR
V
OUT
V
V
V
TH
OL
IH
Output Capacitor
OUT
IN
< 2.5V. A 1µF capacitor should be con-
ERROR OUTPUT OPERATION
to GND if there is more than 10 inches
©
2002 Microchip Technology Inc.
OUT
OUT
to ground is required.
= 2.5V, and 0.05Ω.
HYSTERESIS (V
HYS
)