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TC55 Series
1µA LOW DROPOUT POSITIVE VOLTAGE REGULATOR
FEATURES
s Extremely Low Power Consumption 1.1µA (Typ.)
s Very Low Dropout Voltage .... 120mV typ at 100mA
380mV typ at 200mA
s Wide Input Voltage Range ..................... 10V (max.)
s High Output Current .............. 250mA (VOUT = 5.0V)
s High Accuracy Output Voltage ........................ ± 2%
(± 1% Semicustom Version)
s Wide Output Voltage Range .................... 1.1V-6.0V
s Low Power Consumption ................... 1.1µA (Typ.)
s Excellent Line Regulation ..................0.2%/V (Typ.)
s Package Options .. 3-Pin SOT-23A, SOT-89, TO-92
s Short Circuit Protection
s Custom Voltages Available from 1.1V to 6.0V in
0.1V Steps for a 2%, and 2.0V to 6.0V for a 1%
Tolerance
APPLICATIONS
s Battery-Powered Devices
s Cameras and Portable Video Equipment
s Pagers and Cellular Phones
s Solar-Powered Instruments
s Consumer Products
FUNCTIONAL BLOCK DIAGRAM
VIN VOUT
Short-circuit
Protection
Voltage
Reference
GND
PIN CONFIGURATION
3-Pin SOT-23A
VIN
2
3-Pin SOT-89
TC55
1
GND
3
VOUT
TC55
1
GND
23
VIN VOUT
3-Pin TO-92
1 23
TC55
GENERAL DESCRIPTION
The TC55 Series is a family of CMOS low dropout
positive voltage regulators which can source up to 250mA of
current. The extremely low operating current (1.1µA typical)
makes this part the ideal choice for battery operated appli-
cations and eliminates the need for an additional shutdown
mode. The power consumption of the TC55 is 1000 times
lower than in bipolar regulators, significantly extending
battery life.
The maximum input voltage of 10V combined with the
wide output voltage range (1.1V to 6.0V, in 100mV incre-
ments) makes this device suitable for a large variety of
applications. Other key features include low dropout voltage
(380mV typical at 200mA) and excellent line regulation
(0.2%/V). The low voltage differential (dropout voltage) also
extends battery operating lifetime and permits high
currents in small packages when operated with minimum
VIN – VOUT differentials.
The circuit also incorporates short-circuit protection to
ensure maximum reliability. The TC55 is stable with an
output capacitor (ceramic or tantalum) of only 1µF and is
available in a tiny SOT-23A package for space critical
applications, as well as in a 3-pin SOT-89 and a 3-pin TO-
92 package.
ORDERING INFORMATION
PART CODE TC55 RP XX X X X XX XXX
Output Voltage:
Ex: 20 = 2.0V; 60 = 6.0V 1.0% Tol.
Ex: 11 = 1.1V; 60 = 6.0V 2.0% Tol.
Extra Feature Code: Fixed: 0
Tolerance:
1 = 1.0% (Custom)
2 = 2.0% (Standard)
Temperature: E: – 40°C to +85°C
Package Type and Pin Count:
CB: 3-Pin SOT-23A (equivalent to EIAJ SC-59)
MB: 3-Pin SOT-89
ZB: 3-Pin TO-92
Taping Direction:
TR or 713: Standard Taping
RT or 723: Reverse Taping
No suffix: TO-92 Bulk
*SOT-23A-3 is equivalent to EIAJ SC-59
TC55-24 9/30/99 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices.

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1µA LOW DROPOUT POSITIVE VOLTAGE REGULATOR
TC55 Series
ABSOLUTE MAXIMUM RATINGS*
Item
Code
Ratings
Units
Input Voltage
Output Current
Output Voltage
Power Dissipation:
(TA 70°C)
3-Pin SOT-23A
3-Pin SOT-89
3-Pin TO-92
VIN
IOUT
VOUT
Pd
+12
Pd/(VIN – VOUT)
(VSS – 0.3) to (VIN + 0.3)
240
400
440
V
mA
V
mW
Operating Temperature Range
Storage Temperature Range
TA
Tstg
– 40 to +85
– 65 to +150
°C
°C
TC55RP50 ELECTRICAL CHARACTERISTICS: VOUT(S) = 5.0V, TA = 25°C unless otherwise specified (see REMARKS).
Symbol
Parameter
Test Conditions
Min Typ Max Unit
VOUT(A)
IOUTmax
VOUT
Vdif
ISS
VOUT(A)·100
VIN·VOUT(S)
VIN
VOUT(A)·106
VOUT(S)·TA
REMARKS:
Output Voltage
IOUT = 40mA
VIN = 6.0V
Maximum Output Current
Load Regulation
VIN = 6.0V, VOUT(A) 4.5V
VIN = 6.0 V, 1mA IOUT 100mA
I/O Voltage Difference
IOUT = 100mA
IOUT = 200mA
Current Consumption
VIN = 6.0V
Voltage Regulation
IOUT = 40mA
6.0V VIN 10.0V
Input Voltage
Temperature Coefficient
of Output Voltage
Long Term Stability
IOUT = 40mA
– 40°C TA 85°C
TA = 125°C, 1000 Hours
VOUT(S): Preset value of Output voltage
VOUT(A): Actual value of Output voltage
Vdif: Definition of I/O voltage difference = {VIN1 – VOUT(A)}
VOUT(A): Output Voltage when IOUT is fixed and VIN = VOUT(S) + 1.0V
VIN1: Input Voltage when the output voltage is 98% VOUT(A)
— — —V
4.90 5.0 5.10
250 — — mA
— 40 80 mV
— 120 300 mV
— 380 600
— 1.1 3.0 µA
— 0.2 0.3 %/V
— — 10.0 V
±100
— ppm/°C
— 0.5 — %
TC55RP40 ELECTRICAL CHARACTERISTICS: VOUT(S) = 4.0V, TA = 25°C unless otherwise specified (see REMARKS).
Symbol
Parameter
Test Conditions
Min Typ Max Unit
VOUT(A)
IOUTmax
VOUT
Vdif
ISS
VOUT(A)·100
VIN·VOUT(S)
VIN
VOUT(A)
VOUT(S)·TA
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
IOUT = 40mA
VIN = 5.0V
VIN = 5.0V, VOUT(A) 3.6V
VIN = 5.0V, 1mA IOUT 100mA
IOUT = 100mA
IOUT = 200mA
VIN = 5.0V
IOUT = 40mA
5.0V VIN 10.0V
IOUT = 40mA
– 40°C TA 85°C
TA = 125°C, 1000 Hours
— ——V
3.92 4.0 4.08
200 — — mA
— 45 90 mV
— 170 330 mV
— 400 630
— 1.0 2.9 µA
— 0.2 0.3 %/V
— — 10.0 V
±100
— ppm/°C
— 0.5 — %
TC55-24 9/30/99
2

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1µA LOW DROPOUT POSITIVE VOLTAGE REGULATOR
TC55 Series
TC55RP30 ELECTRICAL CHARACTERISTICS: VOUT(S) = 3.0V, TA = 25°C unless otherwise specified (see REMARKS).
Symbol
Parameter
Test Conditions
Min Typ Max Unit
VOUT(A)
Output Voltage
IOUT = 40mA
VIN = 4.0V
— — —V
2.94 3.0 3.06
IOUTmax
Maximum Output Current
VIN = 4.0V, VOUT(A) 2.7V
150 — — mA
VOUT
Load Regulation
VIN = 4.0V, 1mA IOUT 80mA
45 90 mV
Vdif
I/O Voltage Difference
IOUT = 80mA
IOUT = 160mA
— 180 360 mV
— 400 700
ISS
Current Consumption
VIN = 4.0V
— 0.9 2.8 µA
VOUT(A)·100
VIN·VOUT(S)
Voltage Regulation
IOUT = 40mA
4.0V VIN 10.0V
— 0.2 0.3 %/V
VIN Input Voltage
— — 10.0 V
VOUT(A)·106
TA·VOUT(S)
Temperature Coefficient
of Output Voltage
IOUT = 40mA
– 40°C TA 85°C
±100
— ppm/°C
Long Term Stability
TA = 125°C, 1000 Hours
— 0.5 — %
*Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. 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 operational sections of the specifications is not implied. Exposure to Absolute Maximum Rating
Conditions for extended periods may affect device reliability.
MARKING
3-Pin SOT-23A
3-Pin SOT-89
3-Pin TO-92
➁➃
x➁➂➃
x➂
1234
5678
9 10 11 12
represents first voltage digit
23 4 5 6
ex: 3.xv = k3 kkk
represents first decimal place voltage (x.0 - x.9)
A = x.0
E = x.4
L = x.8
B = x.1
F = x.5
M = x.9
C = x.2
H = x.6
D = x.3
K = x.7
ex: 3.4V = k3 kE kk
represents Polarity
0 = Positive (fixed)
represents assembly lot number
, , & = 55RP (fixed)
= first voltage digit (2-6)
= first voltage decimal (0-9)
= extra feature code : fixed : 0
= regulation accuracy
1 = ±1.0% (custom), 2 = ±2.0% (standard)
, , & = assembly lot number
TC55-24 9/30/99
3

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1µA LOW DROPOUT POSITIVE VOLTAGE REGULATOR
TC55 Series
TYPICAL CHARACTERISTICS
1. OUTPUT VOLTAGE vs. OUTPUT CURRENT
TC55RP3002 (VIN = 4.0V)
3.1
3.0
80°C
2.9
- 30°C
25°C
2.8
2.7
0 20 40 60 80 100 120 140 160
OUTPUT CURRENT IOUT (mA)
2. OUTPUT VOLTAGE vs. INPUT VOLTAGE
TC55RP3002
3.2 TOPR = 25°C
3.0
IOUT = 1mA
2.8
40mA
2.6
10mA
2.4
2.2
2.5
5.2
3.0
INPUT VOLTAGE VIN (V)
3.5
TC55RP5002
TOPR = 25°C
5.0
IOUT = 1mA
4.8
40mA
4.6
10mA
4.4
TC55-24 9/30/99
4.2
4.5
5.0
INPUT VOLTAGE VIN (V)
5.5
4
TC55RP5002 (VIN = 6.0V)
5.1
5.0
80°C
4.9
- 30°C
25°C
4.8
4.7
0
40 80 120 160 200
OUTPUT CURRENT IOUT (mA)
3.05
3.04
3.03
3.02
3.01
3.00
2.99
2.98
2.97
2.96
2.95
3
TC55RP3002
TOPR = 25°C
IOUT = 1mA
45 6 7 8 9
INPUT VOLTAGE VIN (V)
10
5.05
5.04
5.03
5.02
5.01
5.00
4.99
4.98
4.97
4.98
4.95
5
TC55RP5002
TOPR = 25°C
IOUT = 1mA
6789
INPUT VOLTAGE VIN (V)
10

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1µA LOW DROPOUT POSITIVE VOLTAGE REGULATOR
TYPICAL CHARACTERISTICS
3. DROPOUT VOLTAGE vs. OUTPUT CURRENT
TC55RP3002
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.2
0
80°C
20 40
25°C
30°C
60 80 100 120 140 160
OUTPUT CURRENT IOUT (mA)
4. OUTPUT VOLTAGE vs. OPERATING TEMPERATURE
TC55RP3002 (VIN = 4.0V)
3.10
3.08
3.06
3.04
3.02
3.00
2.98
2.96
IOUT = 10mA
40mA
2.94
2.92
2.90
40 20 0 20 40 60 80 100
OPERATING TEMPERATURE (°C)
5. SUPPLY CURRENT vs. INPUT VOLTAGE
TC55RP3002 TOPR = 25°C
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0.8
0.7
0.6
0.5
3
4 56 7 8 9
INPUT VOLTAGE VIN (V)
10
TC55-24 9/30/99
TC55 Series
2.0
1.8
1.6
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0.2
0
TC55RP5002
80°C
25°C
30°C
40 80 120 160 200
OUTPUT CURRENT IOUT (mA)
TC55RP5002 (VIN = 6.0V)
5.10
5.08
5.06
5.04
5.02
5.00
IOUT = 10mA
4.98
40mA
4.96
4.94
4.92
4.90
40 20 0 20 40 60 80 100
OPERATING TEMPERATURE (°C)
2.0
1.9
1.8
1.7
1.6
1.4
1.3
1.2
1.1
1.0
0.5
5
5
TC55RP5002
TOPR = 25°C
6789
INPUT VOLTAGE VIN (V)
10