Microchip Technology TC1186-5.0VCT, TC1186-3.6VCT, TC1186-3.3VCT, TC1186-3.0VCT, TC1186-2.8VCT Datasheet
...
TC1054/TC1055/TC1186
50mA, 100mA and 150mA CMOS LDOs with Shutdown and ERROR Output
Features
• Extremely Low Ground Current forLonger
Battery Life
• Very Low Dropout Voltage
• Choice of 50mA (TC1054),100mA (TC1055)and
150mA (TC1186) Output
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power-Saving Shutdown Mode
• ERROR
Detector, or Processor Reset Generator
• Over Current and O ver Temperature Protection
• Space-Saving 5-Pin SOT-23A Package
• Pin Compatible Upgrades for Bipolar Regulators
Output Can Be Used as a Low Battery
Applications
• Battery Operated Systems
• PortableComputers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHSPhones
• Linear Post-Regulators for SMPS
• Pagers
Device Selection Table
Part Number Package
TC1054-xxVCT 5-Pin SOT-23A -40°C to +125°C
TC1055-xxVCT 5-Pin SOT-23A -40°C to +125°C
TC1186-xxVCT 5-Pin SOT-23A -40°C to +125°C
NOTE: xx indicates outputvoltages
Available Output Voltages: 1.8, 2.5, 2.7, 2.8, 2.85, 3.0, 3.3,
3.6, 4.0, 5.0.
Other output voltages are available. Please contact Microchip
T echnology Inc. for details.
Junction
Temp. Range
Package Type
5-Pin SOT-23A
V
OUT
5
ERROR
4
TC1054
TC1055
TC1186
13
2
V
IN
NOTE: 5-Pin SOT-23A is equivalentto the EIAJ (SC-74A)
2002 Microchip TechnologyInc. DS21350B-page 1
GND
SHDN
TC1054/TC1055/TC1186
General Description
The TC1054, TC1055 and TC1186 are high accuracy
(typically ±0.5%) CMOS upgrades for older (bipolar)
low dropout regulators. Designed specifically for
battery-operated systems, the devices’ CMOS
construction eliminates wasted ground current,
significantly extending battery life. Total supply current
is typically 50µA at full load (20 to 60 times lower than
in bipolar regulators).
The devices’ key features include ultra low noise
operation, very l ow dropout voltage – typically 85mV
(TC1054); 180mV (TC1055); and 270mV (TC1186) at
full l oad — and fast response to step changes in load.
An error output (ERROR
are out-of-regulation (due to a low input voltage or
excessive output current). ERROR
low battery war ning or as a processor RESET
(with the addition of an external RC network). Supply
current is reduced to 0.5µA (max) and both V
ERROR
are disabled when the shutdown input is low.
The devices i ncorporate both over-temperature and
over-current protection.
The TC1054, TC1055 and TC1186 are stable with an
output capacitor of only 1µF and have a maximum
output current of 50mA, 100mA and 150mA,
respectively. For higher output current regulators,
please see the TC1173 (I
) is asserted when thedevices
canbeusedasa
signal
and
OUT
= 300mA) data sheet.
OUT
Typical Application
V
IN
(from Power Control Logic)
1
V
IN
2
GND
3
SHDN
Shutdown Control
TC1054
TC1055
TC1186
V
OUT
ERROR
5
4
V
OUT
+
1µF
ERROR
DS21350B-page 2
2002 Microchip TechnologyInc.
TC1054/TC1055/TC1186
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage......................................................... 6.5V
Output Voltage...........................(-0.3V) to (V
+0.3V)
IN
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanentdamage to the device. These
are stress ratings only and functional operation of the device
at these or any other conditions above those indicated in the
operation sections of the specifications is not implied.
Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability.
Power Dissipation............... Internally Limited (Note 6)
Maximum Voltage on Any Pin ........ V
OperatingTemperature Range...... -40°C < T
+0.3V to -0.3V
IN
< 125°C
J
Storage Temperature. ........................ -65°C to +150°C
TC1054/TC1055/TC1186 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VIN=V
type specifications apply for junction temperatures of -40°C to +125°C.
Symbol Parameter Min Typ Max Units Test Conditions
V
IN
I
OUTMAX
V
OUT
TCV
OUT
/∆VINLine Regulation — 0.05 0.35 %(VR+1V)≤ VIN ≤ 6V
∆V
OUT
∆V
OUT/VOUT
V
IN-VOUT
I
IN
I
INSD
Input OperatingVoltage 2.7 — 6.0 V Note 8
Maximum Output Current 50
Output Voltage VR–2.5% VR±0.5% VR+2.5% V Note 1
V
T emperature Coefficient —
OUT
Load Regulation TC1054; TC1055
Dropout Voltage
Supply Curre nt — 50 80 µA SHDN =VIH,IL=0
Shutdown Supply Current — 0.05 0.5 µA SHDN =0V
PSRR Power Supply Rejection Ratio — 64 — dB F
I
OUTSC
/∆PDThermal Regulation — 0.04 — V/W Notes 5, 6
∆V
OUT
T
SD
∆T
SD
Output Short Circuit Current — 300 450 mA V
Thermal Shutdown Die Temperature — 160 — °C
Thermal Shutdown Hysteresis — 10 — °C
eN Output Noise — 260 — nV/√Hz
Note 1: VRis the regulator output voltage setting. For example: VR= 1.8V, 2.5V, 2.7V, 2.85V, 3.0V, 3.3V,3.6V, 4.0V, 5.0V.
2:
TC V
=(V
OUT
OUTMAX–VOUTMIN
V
3: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range
from 0.1mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal
regulation specification.
4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value.
5: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or
line regulation effects. Specifications are for a current pulse equal to I
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the
thermal resistance from junction-to-air (i.e., T
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.
7: Hysteresis voltage is referenced by V
8: Them inimum V
OUT
has to justify the conditions: VIN≥ VR+V
IN
+1V,IL=100µA, CL=3.3µF, SHD N >VIH,TA= 25°C, unless otherwise noted. Boldface
OUT
mA TC1054
TC1055
TC1186
ppm/°C Note 2
%IL= 0.1mA to I
IL= 0.1mA to I
TC1186
100
150
—
—
—
—
—
—
20
40
0.5
0.5
—
—
—
—
—
2
3
(Note 3)
mV I
=100µA
L
I
=20mA
L
I
=50mA
L
I
=100mA
L
I
=150mA(Note 4)
L
≤ 1kHz
RE
=0V
OUT
IL=I
OUTMAX
.
OUTMAX
TC1055; TC1186
TC1186
6
)x 10
x ∆T
—
—
—
—
—
, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate
A,TJ
.
R
2
65
85
180
270
LMAX
andVIN≥ 2.7V for IL=0.1mAtoI
DROPOUT
—
—
120
250
400
at VIN= 6V for T = 10 msec.
OUTMAX
OUTMAX
2002 Microchip TechnologyInc. DS21350B-page 3
TC1054/TC1055/TC1186
TC1054/TC1055/TC1186 ELECTRICAL SPECI FICATIONS (CONTINUED)
Electrical Characteristics: VIN=V
type specifications apply for junctiontemperaturesof -40°C to +125°C.
+1V,IL=100µA, CL=3.3µF, SHDN >VIH,TA= 25°C, unless otherwise noted. Boldface
OUT
Symbol Parameter Min Typ Max Units Test Conditions
SHDN
Input
V
IH
V
IL
ERROR
V
INMIN
V
OL
V
TH
V
HYS
Note 1: VRis the regulator output voltage setting. For example: VR= 1.8V, 2.5V , 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 4.0V, 5.0V.
SHDN Input High Threshold 45 — — %VINVIN=2.5Vto6.5V
SHDN Input Low Threshold — — 15 %VINVIN=2.5Vto6.5V
Output
Minimum VIN Operating Voltage 1.0 — — V
Output Logic Low Voltage
ERROR ThresholdVoltage — 0.95 x V
— — 400 mV 1 mA Flows to ERROR
— V SeeFigure3-2
R
ERROR Positive Hysteresis — 50 — mV Note 7
2:
TC V
=(V
OUT
OUTMAX–VOUTMIN
V
x ∆T
3: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range
from 0.1mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal
regulation specification.
4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value.
5: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or
line regulation effects. Specifications are for a current pulse equal to I
6: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the
thermal resistance from junction-to-air (i.e., T
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.
7: Hysteresis voltage is referenced by V
8: Theminimum V
OUT
has to justify the conditions: VIN≥ VR+V
IN
)x 10
6
at VIN= 6V for T = 10 msec.
LMAX
, θJA). Exceeding the maximum allowable power dissipation causes the device to initiate
A,TJ
.
R
and VIN≥ 2.7V for IL= 0.1mA to I
DROPOUT
OUTMAX
.
DS21350B-page 4
2002 Microchip TechnologyInc.
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1: PIN FUNCTION TABLE
TC1054/TC1055/TC1186
Pin No.
(5-Pin SOT-23A)
1V
2 GND Ground terminal.
3 SHDN
4 ERROR
5V
Symbol Description
IN
OUT
Unregulated supply input.
Shutdown control input. The regulator is fully enabled when a logic high is applied to this
input. The regulator entersshutdown when a logic low is applied to this input.During
shutdown, outputvoltage falls to zero, ERROR
reducedto0.5µA(max).
Out-of-Regulation Flag.(Open drain output).This output goes low when V
tolerance by approximately – 5%.
Regulated voltage output.
is open circuited and supply current is
is out-of-
OUT
2002 Microchip TechnologyInc. DS21350B-page 5
TC1054/TC1055/TC1186
3.0 DETAILED DESCRIPTION
The TC1054, TC1055 and TC1186 are precision fixed
output voltage regulators. (If an adjustable version is
desired, please see the TC1070/TC1071/TC1187 data
sheet.) Unlike bipolar regulators, the TC1054, TC1055
and TC1186supplycurrentdoesnot increasewith load
current. In addition, V
regulation over the entire 0mA to I
load current range, (an important consideration in RTC
and CMOS RAM battery back-up applications).
Figure 3-1 shows a typical application circuit. The
regulator is enabled any time the shutdown input
(SHDN
)isatoraboveVIH, and shutdown (disabled)
when SHDN
is at or below VIL. SHDN may be
controlled by a CMOS logic gate, or I/O port of a
microcontroller. If the SHDN
should be connected directly to the input supply. While
in shutdown, supply current decreases to 0.05µA
(typical), V
fallsto zero volts, and ERROR is open-
OUT
circuited.
FIGURE 3-1: TYPICAL APPLICATION
+
1µF
+
Battery
Shutdown Control
(to CMOS Logic or Tie
to V
if unused)
IN
if ERROR is used as a
Processor RESET Signal
remains stable and within
OUT
OUTMAX
input is not required, it
CIRCUIT
TC1054
TC1055
TC1186
(See Text)
V
OUT
ERROR
V+
V
IN
GND
SHDN
C2 Required Only
+
R1
1M
1µF
C1
0.2µF
C2
operating
V
OUT
BATTLOW
or RESET
3.1 ERROR Open Drain Output
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 ERRO R
5% below rated V
outputvoltagevalue(e.g.ERROR
regardless of t he programmed
OUT
=VOLat 4.75V (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
inactive when V
isactivewhen V
rises above VTHby V
OUT
OUT
As shown in Figure 3-1, ERROR
battery low flag, or as a processor RESET
the addition of timing capacitor C2). R1 x C2 should be
chosen to maintain ERROR
RESET
inputfor at least 200 msec to allow time for the
below VIHof the processor
system to stabilize. Pull-up resistor R1 can be tied to
V
OUT,VIN
or any other voltageless than (VIN+0.3V).
FIGURE 3-2: ERROR OUTPUT
OPERATION
V
OUT
V
TH
ERROR
V
IH
V
OL
falls out of
OUT
threshold is
fallsto VTH, and
.
HYS
canbeusedasa
signal (with
HYSTERESIS (VH)
3.2 Output Capacitor
A1µF(min)capacitorfromV
recommended. The output capacitor should have an
effective s eries resistance greater than 0.1Ω and less
than 5.0Ω, and a resonant frequency above 1MHz. A
1µF capacitor should be connected from V
there i s 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.
to ground is
OUT
to GND if
IN
DS21350B-page 6
2002 Microchip TechnologyInc.
Loading...