TC1054 TelCom Semiconductor, TC1054 Datasheet

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TC1054

Manufacturer Part Number
TC1054
Description
50mA CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT
Manufacturer
TelCom Semiconductor
Datasheet

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50mA CMOS LDO WITH SHUTDOWN
AND ERROR OUTPUT
50mA CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT
ORDERING INFORMATION
Part No.
TC1054-2.5VCT
TC1054-2.7VCT
TC1054-3.0VCT
TC1054-3.3VCT
TC1054-5.0VCT
NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A)
PIN CONFIGURATION
TC1054-01 6/12/97
FEATURES
APPLICATIONS
NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A)
Zero Ground Current for Longer Battery Life
Very Low Dropout Voltage
Guaranteed 50mA 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
Over-Current and Over-Temperature Protection
Space-Saving SOT-23A-5 Package
Pin Compatible Upgrades for Bipolar Regulators
Battery Operated Systems
Portable Computers
Medical Instruments
Instrumentation
Cellular/GSMS/PHS Phones
Linear Post-Regulators for SMPS
Pagers
** Other output voltages available. Please contact TelCom
Semiconductor for details
Voltage **(V) Package
TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices
Output
V
OUT
V
2.5
2.7
3.0
3.3
5.0
5
1
IN
GND
2
ERROR
SHDN
SOT-23A-5* – 40 C to +125 C
SOT-23A-5* – 40 C to +125 C
SOT-23A-5* – 40 C to +125 C
SOT-23A-5* – 40 C to +125 C
SOT-23A-5* – 40 C to +125 C
4
3
(SOT-23A-5*)
TOP VIEW
TC1054
Temp. Range
Junction
1
GENERAL DESCRIPTION
upgrade for older (bipolar) low dropout regulators. De-
signed specifically for battery-operated systems, the
TC1054’s CMOS construction eliminates wasted ground
current, significantly extending battery life. Total supply
current is typically 50 A at full load ( 20 to 60 times lower
than in bipolar regulators !).
very low dropout voltage (typically 100mV at full load) and
internal feed-forward compensation for fast response to
step changes in load. An error output (ERROR) is asserted
when the TC1054 is 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 less than 1 A, and both V
are disabled when the shutdown input is low. The TC1054
incorporates both over-temperature and over-current pro-
tection.
1 F and has a maximum output current of 50mA. For higher
output current regulators, please see the TC1055
(I
300mA) data sheets.
TYPICAL APPLICATION
(from Power Control Logic)
OUT
The TC1054 is a high accuracy (typically 0.5%) CMOS
TC1054 key features include ultra low noise operation,
The TC1054 is stable with an output capacitor of only
Shutdown Control
= 100mA) regulator and TC1107, TC1108 (I
V
IN
2
1
3
SHDN
GND
V
PRELIMINARY INFORMATION
IN
TC1054
ERROR
V
OUT
5
4
OUT
1M
and ERROR
TC1054
TC1054
1 F
V
ERROR
OUT
OUT
=

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TC1054 Summary of contents

Page 1

... An error output (ERROR) is asserted when the TC1054 is out-of-regulation (due to a low input voltage or excessive output current). ERROR can be used as a low battery warning processor RESET signal (with the addition of an external RC network) ...

Page 2

... SHDN Input High Threshold IH V SHDN Input Low Threshold IL TC1054-01 6/12/97 50mA CMOS LDO WITH SHUTDOWN *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 ...

Page 3

... Please see Thermal Considerations section of this data sheet for more details. 8. Hysteresis voltage is referenced by V PIN DESCRIPTION Pin No. (SOT-23A-5) Symbol GND 3 SHDN 4 ERROR 5 V OUT TC1054-01 6/12/ 1V 0.1mA OUT L Test Conditions 1mA Flows to ERROR See Figure 2 Note 8 = 2.5V, 2.7V, 3.0V, 3.3V, 5.0V ...

Page 4

... The TC1054 is a precision fixed output voltage regula- tor. (If an adjustable version is desired, please see the TC1070 or TC1071 data sheets.) Unlike the bipolar regula- tors, the TC1054 supply current does not increase with load current. In addition, V remains stable and within regula- ...

Page 5

... DMAX J MAX A MAX JA = (125 – 55) 220 = 318mW TC1054-01 6/12/97 In this example, the TC1054 dissipates a maximum of only 18.5mW; far below the allowable limit of 318mW LOAD MAX similar manner, Equation 1 and Equation 2 can be used to calculate maximum current and/or input voltage limits. Layout Considerations IN The primary path of heat conduction out of the package is via the package leads ...

Page 6

... REFERENCE .122 (3.10) .106 (2.70) 10 MAX. .006 (0.15) .022 (0.55) .000 (0.00) .008 (0.20) TelCom Semiconductor Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236 6 AND ERROR OUTPUT TC1054 (V) Code 2.5 C1 2.7 C2 3.0 C3 3.3 C4 5.0 C6 .010 (0.25) .004 (0.09) Dimensions: inches (mm) TelCom Semiconductor H.K. Ltd. 10 Sam Chuk Street, Ground Floor ...

Page 7

... SHDN IN NOTE: *SOT-23A-5 is equivalent to the EIAJ (SC-74A) TC1055-01 6/5/97 TelCom Semiconductor reserves the right to make changes in the circuitry and specifications of its devices GENERAL DESCRIPTION The TC1055 is a high accuracy (typically 0.5%) CMOS upgrade for older (bipolar) low dropout regulators. De- signed specifically for battery-operated systems, the TC1055’ ...

Page 8

PRELIMINARY INFORMATION TC1055 ABSOLUTE MAXIMUM RATINGS* Input Voltage .................................................................7V Output Voltage ............................. (– 0.3V Power Dissipation .................... Internally Limited (Note 7) Operating Temperature Range ........ – < T Storage Temperature ............................ – +150 ...

Page 9

CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT ELECTRICAL CHARACTERISTICS: Symbol Parameter ERROR Open Drain Output V Minimum Operating Voltage MIN V Output Logic Low Voltage OL V ERROR Threshold Voltage TH V ERROR Positive Hysteresis HYS NOTES ...

Page 10

PRELIMINARY INFORMATION TC1055 DETAILED DESCRIPTION The TC1055 is a precision fixed output voltage regula- tor. (If an adjustable version is desired, please see the TC1070 or TC1071 data sheets.) Unlike the bipolar regula- tors, the TC1055 supply current does not ...

Page 11

CMOS LDO WITH SHUTDOWN AND ERROR OUTPUT P (V – MAX OUT MIN Where Worst case actual power dissipation Maximum voltage MAX V = Minimum regulator output voltage ...

Page 12

... Austin Product Center 9101 Burnet Rd. Suite 214 Austin, TX 78758 TEL: 512-873-7100 FAX: 512-873-8236 6 AND ERROR OUTPUT TC1055 (V) Code 2.5 D1 2.7 D2 3.0 D3 3.3 D4 5.0 D6 .010 (0.25) .004 (0.09) Dimensions: inches (mm) TelCom Semiconductor H.K. Ltd. 10 Sam Chuk Street, Ground Floor San Po Kong, Kowloon Hong Kong TEL: 852-2324-0122 FAX: 852-2354-9957 Printed in the U.S.A. ...

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