TC1072/TC1073
50mA and 100mA CMOS LDOs with Shutdown, ERROR Output and V
REF
Bypass
Features
• Zero Ground Current for Longer Battery Life
• Very Low Dropout Voltage
• Choice of 50mA (TC1072) and 100mA (TC1073)
Output
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power-Saving Shutdown Mode
• ERROR Output Can Be Used as a Low Battery
Detector or Processor Reset Generator
• Bypass Input for Ultra Quiet Operation
• Over Current and Over Temperature Protection
• Space-Saving 6-Pin SOT-23A Package
• Pin Compatible Upgrades for Bipolar Regulators
Device Selection Table
Part Number
TC1072-xxVCH
TC1073-xxVCH
Package
6-Pin SOT-23A
6-Pin SOT-23A
Junction
Temp. Range
-40°C to +125°C
-40°C to +125°C
NOTE:
xx indicates output voltages
Available Output Voltages: 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
Technology Inc. for details.
Package Type
6-Pin SOT-23A
V
OUT
Bypass ERROR
6
5
4
Applications
•
•
•
•
•
•
•
Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular/GSM/PHS Phones
Linear Post-Regulators for SMPS
Pagers
TC1072
TC1073
1
V
IN
2
GND
3
SHDN
NOTE:
6-Pin SOT-23A is equivalent to the EIAJ (SC-74A)
2002 Microchip Technology Inc.
DS21354B-page 1
©
TC1072/TC1073
General Description
The TC1072 and TC1073 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 (plus optional Bypass input); very low
dropout voltage (typically 85mV, TC1072 and 180mV,
TC1073 at full load) and fast response to step changes
in load. An error output (ERROR) is asserted when the
devices are out-of-regulation (due to a low input
voltage or excessive output current). ERROR can be
used as a low battery warning or as a processor
RESET signal (with the addition of an external RC
network). Supply current is reduced to 0.5µA (max) and
both V
OUT
and ERROR are disabled when the
shutdown input is low. The devices incorporate both
over-temperature and over-current protection.
The TC1072 and TC1073 are stable with an output
capacitor of only 1µF and have a maximum output
current of 50mA, and 100mA respectively. For higher
output current versions, please see the TC1185,
TC1186, TC1187 (I
OUT
= 150mA) and TC1107, TC1108
and TC1173 (I
OUT
= 300mA) data sheets.
Typical Application
R
P
V
IN
1
V
IN
V
OUT
6
+
1µF
5
V
OUT
TC1072
TC1073
2
GND
Bypass
C
BYPASS
470pF
3
SHDN
ERROR
4
ERROR
Shutdown Control
(from Power Control Logic)
©
DS21354B-page 2
2002 Microchip Technology Inc.
TC1072/TC1073
1.0
ELECTRICAL
CHARACTERISTICS
*Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage 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.
Absolute Maximum Ratings*
Input Voltage......................................................... 6.5V
Output Voltage ...........................(-0.3V) to (V
IN
+ 0.3V)
Power Dissipation ............... Internally Limited
(Note 6)
Maximum Voltage on Any Pin ........ V
IN
+0.3V to -0.3V
Operating Temperature Range ......-40°C < T
J
< 125°C
Storage Temperature ......................... -65°C to +150°C
TC1072/TC1073 ELECTRICAL SPECIFICATIONS
Electrical Characteristics:
V
IN
= V
OUT
+ 1V, I
L
= 0.1mA, C
L
= 3.3µF, SHDN > V
IH
, T
A
= 25°C, unless otherwise noted.
Boldface
type specifications apply for junction temperatures of -40°C to +125°C.
Symbol
V
IN
I
OUT
MAX
V
OUT
TCV
OUT
∆V
OUT
/∆V
IN
∆V
OUT
/V
OUT
V
IN
-V
OUT
Parameter
Input Operating Voltage
Maximum Output Current
Output Voltage
V
OUT
Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage
Min
2.7
50
100
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
Typ
—
—
—
20
40
0.05
0.5
2
65
85
180
50
0.05
64
300
0.04
160
10
260
Max
6.0
—
—
—
—
0.35
2.0
—
—
120
250
80
0.5
—
450
—
—
—
—
Units
V
mA
mA
V
ppm/°C
%
%
mV
Test Conditions
Note 9
TC1072
TC1073
Note 1
Note 2
(V
R
+ 1V)
≤
V
IN
≤
6V
I
L
= 0.1mA to I
OUT
MAX
(Note 3)
I
L
= 0.1mA
I
L
= 20mA
I
L
= 50mA
I
L
= 100mA
(Note 4),
TC1073
SHDN = V
IH
, I
L
= 0
(Note 8)
SHDN = 0V
F
RE
≤
1kHz
V
OUT
= 0V
Notes 5, 6
V
R
– 2.5%
V
R
±0.5%
V
R
+ 2.5%
I
IN
I
INSD
PSRR
I
OUT
SC
∆V
OUT
/∆P
D
T
SD
∆T
SD
eN
SHDN Input
V
IH
V
IL
Note
1:
2:
3:
Supply Current
Shutdown Supply Current
Power Supply Rejection Ratio
Output Short Circuit Current
Thermal Regulation
Thermal Shutdown Die Temperature
Thermal Shutdown Hysteresis
Output Noise
µA
µA
dB
mA
V/W
°C
°C
nV/√Hz
I
L
= I
OUT
MAX
470pF from Bypass to GND
V
IN
= 2.5V to 6.5V
V
IN
= 2.5V to 6.5V
SHDN Input High Threshold
SHDN Input Low Threshold
45
—
—
—
—
15
%V
IN
%V
IN
4:
5:
6:
7:
8:
9:
V
R
is the regulator output voltage setting. For example: V
R
= 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 4.0V, 5.0V.
TC V
OUT
= (V
OUT
MAX
– V
OUT
MIN
) x 10
6
V
OUT
x
∆T
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.
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value.
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
L
MAX
at V
IN
= 6V for T = 10 msec.
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
A
, T
J
,
θ
JA
). Exceeding the maximum allowable power dissipation causes the device to initiate
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.
Hysteresis voltage is referenced by V
R
.
Apply for Junction Temperatures of -40°C to +85°C.
The minimum V
IN
has to justify the conditions = V
IN
≥
V
R
+ V
DROPOUT
and V
IN
≥
2.7V for I
L
= 0.1mA to I
OUT
MAX
.
2002 Microchip Technology Inc.
DS21354B-page 3
©
TC1072/TC1073
TC1072/TC1073 ELECTRICAL SPECIFICATIONS (CONTINUED)
Electrical Characteristics:
V
IN
= V
OUT
+ 1V, I
L
= 0.1mA, C
L
= 3.3µF, SHDN > V
IH
, T
A
= 25°C, unless otherwise noted.
Boldface
type specifications apply for junction temperatures of -40°C to +125°C.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
ERROR Open Drain Output
V
IN
MIN
V
OL
V
TH
V
HYS
Note
1:
2:
3:
Minimum V
IN
Operating Voltage
Output Logic Low Voltage
ERROR Threshold Voltage
ERROR Positive Hysteresis
1.0
—
—
—
—
—
0.95 x V
R
50
—
400
—
—
V
mV
V
mV
1 mA Flows to ERROR
See Figure 3-2
Note 7
4:
5:
6:
7:
8:
9:
V
R
is the regulator output voltage setting. For example: V
R
= 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 4.0V, 5.0V.
TC V
OUT
= (V
OUT
MAX
– V
OUT
MIN
) x 10
6
V
OUT
x
∆T
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.
Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value.
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
L
MAX
at V
IN
= 6V for T = 10 msec.
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
A
, T
J
,
θ
JA
). Exceeding the maximum allowable power dissipation causes the device to initiate
thermal shutdown. Please see Section 4.0 Thermal Considerations for more details.
Hysteresis voltage is referenced by V
R
.
Apply for Junction Temperatures of -40°C to +85°C.
The minimum V
IN
has to justify the conditions = V
IN
≥
V
R
+ V
DROPOUT
and V
IN
≥
2.7V for I
L
= 0.1mA to I
OUT
MAX
.
©
DS21354B-page 4
2002 Microchip Technology Inc.
TC1072/TC1073
2.0
PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No.
(6-Pin SOT-23A)
1
2
3
PIN FUNCTION TABLE
Symbol
V
IN
GND
SHDN
Unregulated supply input.
Ground terminal.
Shutdown control input. The regulator is fully enabled when a logic high is applied to this
input. The regulator enters shutdown when a logic low is applied to this input. During
shutdown, output voltage falls to zero and supply current is reduced to 0.05µA (typical).
Out-of-Regulation Flag. (Open drain output). This output goes low when V
OUT
is out-of-
tolerance by approximately – 5%.
Reference bypass input. Connecting a 470pF to this input further reduces output noise.
Regulated voltage output.
Description
4
5
6
ERROR
Bypass
V
OUT
2002 Microchip Technology Inc.
DS21354B-page 5
©
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