Obsolete Device
TC55
1 µA Low Dropout Positive Voltage Regulator
Features
• Low Dropout Voltage: 120 mV (typ) at 100 mA,
380 mV (typ) at 200 mA
• High Output Current: 250 mA (V
OUT
= 5.0V)
• High Accuracy Output Voltage: ±2% (max)
(±1% Semi-Custom Version)
• Low Power Consumption: 1.1 µA (typ)
• Low Temperature Drift: ±100 ppm/°C (typ)
• Excellent Line Regulation: 0.2%/V (typ)
• Package Options: 3-Pin SOT-23A, 3-Pin SOT-89
and 3-Pin TO-92
• Short-Circuit Protection
• Standard Output Voltage Options: 1.2V, 1.8V,
2.5V, 3.0V, 3.3V, 5.0V
General Description
The TC55 Series is a collection of CMOS low dropout,
positive voltage regulators that can source up to
250 mA of current, with an extremely low input-output
voltage differential of 380 mV (typ) at 200 mA.
The TC55’s low dropout voltage, combined with the low
current consumption of only 1.1 µA (typ), makes it ideal
for battery operation. The low voltage differential (drop-
out voltage) extends the battery operating lifetime. It
also permits high currents in small packages when
operated with minimum V
IN
– V
OUT
differentials.
The circuit also incorporates short-circuit protection to
ensure maximum reliability.
Functional Block Diagram
V
IN
V
OUT
Applications
•
•
•
•
•
Battery-Powered Devices
Cameras and Portable Video Equipment
Pagers and Cellular Phones
Solar Powered Instruments
Consumer Products
Short-Circuit
Protection
–
+
Voltage
Reference
GND
DS21435F-page 1
Package Types
3-Pin SOT-23A
V
IN
3
TC55
1
GND
2
V
OUT
TC55
1
2
3
GND V
IN
V
OUT
3-Pin TO-92
123
3-Pin SOT-89
V
IN
Bottom
View
GND V
IN
V
OUT
Note:
3-Pin SOT-23A is equivalent to the
EIAJ SC-59.
©
2005 Microchip Technology Inc.
TC55
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 ........................................................+12V
Output Current (Continuous) ......... P
D
/(V
IN
– V
OUT
)mA
Output Current (peak) ..................................... 500 mA
Output Voltage.................. (V
SS
– 0.3V) to (V
IN
+ 0.3V)
Continuous Power Dissipation:
3-Pin SOT-23A ..........................................240 mW
3-Pin SOT-89 ............................................500 mW
3-Pin TO-92...............................................440 mW
PIN FUNCTION TABLE
Symbol
GND
V
OUT
V
IN
Description
Ground Terminal
Regulated Voltage Output
Unregulated Supply Input
TC55RP50: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 5.0V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
V
OUT
(S)•ΔT
A
Min
—
4.90
250
—
—
—
—
—
—
—
—
Typ
—
5.0
—
40
120
380
1.1
0.2
—
±100
0.5
Max
—
5.10
—
80
300
600
3.0
0.3
10
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 40 mA
V
IN
= 6.0V
V
IN
= 6.0V, V
OUT
(A)
≥
4.5V
V
IN
= 6.0V, 1 mA
≤
I
OUT
≤
100 mA
I
OUT
= 100 mA
I
OUT
= 200 mA
V
IN
= 6.0V
I
OUT
= 40 mA, 6.0V
≤
V
IN
≤
10.0V
ppm/°C I
OUT
= 40 mA, -40°C
≤
T
A
≤ +85°C
%
T
A
= +125°C, 1000 Hours
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
TC55RP40: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 4.0V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
V
OUT
(S)•ΔT
A
Min
—
3.92
200
—
—
—
—
—
—
—
—
Typ
—
4.0
—
45
170
400
1.0
0.2
—
±100
0.5
Max
—
4.08
—
90
330
630
2.9
0.3
10
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 40 mA
V
IN
= 5.0V
V
IN
= 5.0V, V
OUT
(A)
≥
3.6V
V
IN
= 5.0V, 1 mA
≤
I
OUT
≤
100 mA
I
OUT
= 100 mA
I
OUT
= 200 mA
V
IN
= 5.0V
I
OUT
= 40 mA, 5.0V
≤
V
IN
≤
10.0V
ppm/°C I
OUT
= 40 mA, -40°C
≤
T
A
≤ +85°C
%
T
A
= +125°C, 1000 Hours
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
DS21435F-page 2
©
2005 Microchip Technology Inc.
TC55
TC55RP33: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 3.3V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
V
OUT
(S)•ΔT
A
Min
—
3.23
150
—
—
—
—
—
—
—
—
Typ
—
3.30
—
45
180
400
1.0
0.2
—
±100
0.5
Max
—
3.37
—
90
360
700
2.9
0.3
10
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 40 mA
V
IN
= 4.3V
V
IN
= 4.3V, V
OUT
(A)
≥
3.0V
V
IN
= 4.3V,
1 mA
≤
I
OUT
≤
80 mA
I
OUT
= 80 mA
I
OUT
= 160 mA
V
IN
= 4.3V
I
OUT
= 40 mA,
4.3V
≤
I
OUT
≤
10.0V
ppm/°C I
OUT
= 40 mA, -40°C
≤
T
A
≤ +85°C
%
T
A
= +125°C, 1,000 Hours
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
TC55RP30: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 3.0V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
Min
—
2.94
150
—
—
—
—
—
—
—
—
Typ
—
3.0
—
45
180
400
0.9
0.2
—
±100
0.5
Max
—
3.06
—
90
360
700
2.8
0.3
10
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 40 mA
V
IN
= 4.0V
V
IN
= 4.0V, V
OUT
(A)
≥
2.7V
V
IN
= 4.0V, 1 mA
≤
I
OUT
≤
80 mA
I
OUT
= 80 mA
I
OUT
= 160 mA
V
IN
= 4.0V
I
OUT
= 40 mA, 4.0V
≤
V
IN
≤
10.0V
ppm/°C I
OUT
= 40 mA, -40°C
≤
T
A
≤ +85°C
%
T
A
= +125°C, 1000 Hours
V
OUT
(S)•ΔT
A
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
©
2005 Microchip Technology Inc.
DS21435F-page 3
TC55
TC55RP25: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 2.5V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
V
OUT
(S)•ΔT
A
Min
—
2.45
125
—
—
—
—
—
—
—
Typ
—
2.5
—
45
180
400
1.0
0.2
—
±100
0.5
Max
—
2.55
—
90
360
700
2.8
0.3
10
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 40 mA
V
IN
= 3.5V
V
IN
= 3.5V, V
OUT
(A)
≥
2.25V
V
IN
= 3.5V,
1 mA
≤
I
OUT
≤
60 mA
I
OUT
= 60 mA
I
OUT
= 120 mA
V
IN
= 3.5V
I
OUT
= 40 mA,
3.5V
≤
I
OUT
≤
10.0V
ppm/°C I
OUT
= 40 mA, -30°C
≤
T
A
≤ +80°C
%
T
A
= +125°C, 1,000 Hours
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
TC55RP18: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 1.8V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
Min
—
1.764
110
—
—
—
—
—
—
—
Typ
—
1.8
—
—
—
—
—
—
±100
0.5
Max
—
1.836
—
30
300
3.0
0.25
6.0
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 0.5 mA
V
IN
= 2.8V
V
IN
= 2.8V, V
OUT
(A)
≥
1.62V
V
IN
= 2.8V,
1 mA
≤
I
OUT
≤
30 mA
I
OUT
= 0.5 mA
V
IN
= 2.8V
I
OUT
= 0.5 mA,
2.8V
≤
I
OUT
≤
10.0V
ppm/°C I
OUT
= 0.5 mA, -30°C
≤
T
A
≤ +80°C
%
T
A
= +125°C, 1,000 Hours
V
OUT
(S)•ΔT
A
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
DS21435F-page 4
©
2005 Microchip Technology Inc.
TC55
TC55RP12: ELECTRICAL CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 1.2V, T
A
= +25°C (see
Note 1).
Parameters
Output Voltage
Maximum Output Current
Load Regulation
I/O Voltage Difference
Current Consumption
Voltage Regulation
Input Voltage
Temperature Coefficient of Output
Voltage
Long-Term Stability
Note 1:
Sym
V
OUT
(A)
I
OUT
MAX
ΔV
OUT
V
DIF
I
SS
V
OUT
(A)•100
ΔV
IN
•V
OUT
(S)
V
IN
ΔV
OUT
(A)•10
6
Min
—
1.176
50
—
—
—
—
—
—
—
Typ
—
1.200
—
—
—
—
—
—
±100
0.5
Max
—
1.224
—
30
300
3.0
0.25
6.0
—
—
Units
V
mA
mV
mV
µA
%/V
V
Conditions
I
OUT
= 0.5 mA
V
IN
= 2.2V
V
IN
= 2.2V, V
OUT
(A)
≥
1.08V
V
IN
= 2.2V,
1 mA
≤
I
OUT
≤
30 mA
I
OUT
= 0.5 mA
V
IN
= 2.2V
I
OUT
= 0.5 ,
2.2V
≤
I
OUT
≤
10.0V
ppm/°C I
OUT
= 0.5 mA, -30°C
≤
T
A
≤ +80°C
%
T
A
= +125°C, 1,000 Hours
V
OUT
(S)•ΔT
A
V
OUT
(S): Preset value of output voltage; V
OUT
(A): Actual value of output voltage; V
DIF
: Definition of I/O voltage
difference = {V
IN
1 – V
OUT
(A)}; V
OUT
(A): Output voltage when I
OUT
is fixed and V
IN
= V
OUT
(S) + 1.0V; V
IN
1: Input voltage
when the output voltage is 98% V
OUT
(A).
TEMPERATURE CHARACTERISTICS
Electrical Specifications:
Unless otherwise specified, V
OUT
(S) = 5.0V, T
A
= +25°C.
Parameters
Temperature Ranges
Specified Temperature Range (E)
Storage Temperature Range
Package Thermal Resistances
Thermal Resistance, 3L-SOT-23A
Thermal Resistance, 3L-SOT-89
Thermal Resistance, 3L-TO-92
θ
JA
θ
JA
θ
JA
—
—
—
359
110
131.9
—
—
—
ºC/W
ºC/W
ºC/W
When mounted on 1 square
inch of copper
T
A
T
A
-40
-65
—
—
+85
+150
ºC
ºC
Sym
Min
Typ
Max
Units
Conditions
©
2005 Microchip Technology Inc.
DS21435F-page 5
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