300mA CMOS Extremely Supply Current (50µA, Typ.) Very Dropout Vol

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300mA CMOS Extremely Supply Current (50µA, Typ.) Very Dropout Vol

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TC1108
300mA CMOS
Extremely Supply Current (50µA, Typ.) Very Dropout Voltage Guaranteed 300mA Output High Output Voltage Accuracy Standard Custom Output Voltages Over-Current Over-Temperature Protection
GENERAL DESCRIPTION
TC1108 fixed output, high accuracy (typically ±0.5%) CMOS dropout regulator. Total supply current typically 50µA full load times lower than bipolar regulators!). TC1108 features include ultra noise, very dropout voltage (typically 240mV full load), fast response step changes load. TC1108 incorporates both over-temperature over-current protection. TC1108 stable with output capacitor only maximum output current 300mA. available SOT-223 package.
APPLICATIONS
Battery-Operated Systems Portable Computers Medical Instruments Instrumentation Cellular Phones Linear Post-Regulator SMPS Pagers
ORDERING INFORMATION
Part Number Package Junction Temp. Range
TC1108-xxVDB 3-Pin SOT-223 40°C +125°C TC1015EV Evaluation CMOS Family TYPICAL APPLICATION Available Output Voltages: 2.5, 2.8, 3.0, 3.3, indicates output voltages
Other output voltages available. Please contact Microchip Technology details.
VOUT
VOUT
CONFIGURATION
TC1108
SOT-223
TC1108VDB
VOUT
2001 Microchip Technology Inc.
DS21357A
TC1108-2 1/25/00
300mA CMOS
TC1108
ABSOLUTE MAXIMUM RATINGS*
Input Voltage 6.5V Output Voltage (VSS 0.3) (VIN 0.3) Power Dissipation Internally Limited (Note Operating Temperature 40°C 125°C Storage Temperature 65°C +150°C Maximum Voltage 0.3V 0.3V Lead Temperature (Soldering, Sec.) +260°C
*Absolute Maximum Ratings indicate device operation limits beyond damage occur. Device operation beyond limits listed Electrical Characteristics recommended.
ELECTRICAL CHARACTERISTICS:
Symbol
IOUTMAX VOUT VOUT/T VOUT/VIN VOUT/VOUT VOUT
VOUT 100µA, 3.3µF, 25°C, unless otherwise specified. BOLDFACE type specifications apply junction temperatures 40°C +125°C.
Parameter
Input Operating Voltage Maximum Output Current Output Voltage VOUT Temperature Coefficient Line Regulation Load Regulation Dropout Voltage
Test Conditions
Units
ppm/°C
Note Note 0.1mA IOUTMAX (Note 0.1mA 100mA 300mA (Note 1kHz VOUT Note 10kHz, COUT 1µF, RLOAD
0.5% 2.5% 2.5% 0.05 0.35 0.04
PSRR IOUTSC VOUT/PD
Supply Current Power Supply Rejection Ratio Output Short Circuit Current Thermal Regulation Output Noise
nV/Hz
NOTES: regulator output voltage setting. VOUT (VOUTMAX VOUTMIN) VOUT Regulation measured constant junction temperature using duty cycle pulse testing. Load regulation tested over load range from 0.1mA maximum specified output current. Changes output voltage heating effects covered thermal regulation specification. Dropout voltage defined input output differential which output voltage drops below nominal value measured differential. Thermal Regulation defined change output voltage time after change power dissipation applied, excluding load line regulation effects. Specifications current pulse equal ILMAX 10msec. maximum allowable power dissipation function ambient temperature, maximum allowable junction temperature, thermal resistance from junction-to-air (i.e. JA). Exceeding maximum allowable power dissipation causes device initiate thermal shutdown. Please Thermal Considerations section this data sheet more details.
TC1108-2 1/25/00
2001 Microchip Technology Inc.
DS21357A
300mA CMOS
TC1108
DETAILED DESCRIPTION
TC1108 precision, fixed output LDO. Unlike bipolar regulators, TC1108 supply current does increase with load current. addition, VOUT remains stable within regulation very load currents important consideration CMOS battery backup applications). Figure shows typical application circuit. Where: (VINMAX VOUTMIN)ILOADMAX worst case actual power dissipation VINMAX maximum voltage VOUTMIN minimum regulator output voltage ILOADMAX maximum output (load) current
Equation
Battery
VOUT
VOUT
maximum allowable power dissipation (Equation function maximum ambient temperature (TAMAX), maximum allowable temperature (TJMAX) thermal resistance from junction-to-air JA). PDMAX (TJMAX TAMAX)
TC1108
Where terms previously defined.
Equation
Figure Typical Application Circuit
Table shows various values TC1108 mounted 1/16 inch, 2-layer with copper foil. Table Thermal Resistance Guidelines TC1108 Copper Area (Topside)* 2500 1000 1000 1000 Copper Area (Backside) 2500 2500 2500 2500 1000 Board Area 2500 2500 2500 2500 1000 1000 Thermal Resistance 45°C/W 45°C/W 53°C/W 59°C/W 52°C/W 55°C/W
Output Capacitor (min) capacitor from VOUT ground required. output capacitor should have effective series resistance less. capacitor should connected from there more than inches wire between regulator filter capacitor, battery used power source. Aluminum electrolytic tantalum capacitor types used. (Since many aluminum electrolytic capacitors freeze approximately 30°C, solid tantalums recommended applications operating below 25°C.) When operating from sources other than batteries, supply-noise rejection transient response improved increasing value input output capacitors employing passive filtering techniques.
NOTES: *Tab device attached topside copper
Thermal Considerations
Thermal Shutdown Integrated thermal protection circuitry shuts regulator when temperature exceeds 150°C. regulator remains until temperature drops approximately 140°C. Power Dissipation amount power regulator dissipates primarily function input output voltage, output current. following equation used calculate worst case actual power dissipation:
2001 Microchip Technology Inc. DS21357A
Equation used conjunction with Equation ensure regulator thermal operation within limits. example: GIVEN: VINMAX 3.3V VOUTMIN 2.7V 0.5% ILOADMAX 275mA TJMAX 125°C TAMAX 95°C 59°C/W
FIND: Actual power dissipation Maximum allowable dissipation
TC1108-2 1/25/00
300mA CMOS
TC1108
TYPICAL CHARACTERISTICS
Line Regulation 0.012 0.010
LINE REGULATION Noise (µV//
Output Noise 10.0 2.00 RLOAD COUT
LOAD REGULATION
Load Regulation 1.80 1.60 1.40 1.20 1.00 0.80 0.60 0.40 0.20 100mA 50mA 300mA
0.008 0.006 0.004 0.002 0.000 -0.002 -0.004
0.01
0.01
1000
0.00
TEMPERATURE (°C) Supply Current 100.0
DROPOUT VOLTAGE SUPPLY CURRENT (µA)
FREQUENCY (KHz)
TEMPERATURE (°C) VOUT Temperature 3.075 ILOAD 100µA CLOAD 3.3µF 3.025
VOUT
Dropout Voltage Load Current 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 -40°C 125°C 85°C 70°C 25°C
90.0 80.0 70.0 60.0 50.0 40.0
2.975
2.925
TEMPERATURE (°C)
LOAD CURRENT (mA)
TEMPERATURE (°C)
Power Supply Rejection Ratio VOUT -35dB LOAD -40dB VINAC 50mV -45dB
PSRR (dB)
-30dB
-50dB -55dB -60dB -65dB -70dB -75dB -80dB 100K
FREQUENCY (Hz)
COUT
TC1108-2 1/25/00
2001 Microchip Technology Inc.
DS21357A
300mA CMOS
TC1108
Actual power dissipation: (VINMAX VOUTMIN)ILOADMAX [(3.3 1.1) (2.7 .995)]275 10-3 260mW Maximum allowable power dissipation: (TJMAX TAMAX) PDMAX
MARKINGS 3-Pin SOT-223
(125 508mW
part number code represents temperature date code Identity subcontractor identity
this example, TC1108 dissipates maximum only 260mW; below allowable limit 508mW. similar manner, Equation Equation used calculate maximum current and/or input voltage limits. example, maximum allowable found substituting maximum allowable power dissipation 508mW into Equation from which VINMAX 4.6V.
TC1108 TC1108-2.5VDB TC1108-2.8VDB TC1108-3.0VDB TC1108-3.3VDB TC1108-5.0VDB
Code 110825 110828 110830 110833 110850
TAPING FORM
Component Taping Orientation 3-Pin SOT-223 Devices
User Direction Feed
Device Marking Device Marking
User Direction Feed
Standard Reel Component Orientation Suffix Device (Mark Right Side
Reverse Reel Component Orientation Suffix Device (Mark Upside Down)
Carrier Tape, Number Components Reel Reel Size
Package Carrier Width Pitch Part Full Reel Reel Size
3-Pin SOT-223
4000
2001 Microchip Technology Inc.
TC1108-2 1/25/00 DS21357A
300mA CMOS
TC1108
PACKAGE DIMENSIONS
3-Pin SOT-223
.264 (6.70) .248 (6.30)
.122 (3.10) .114 (2.90)
.287 (7.30) .146 (3.70) .264 (6.70) .130 (3.30)
.091 (2.30) TYP. .033 (0.84) .024 (0.60) .071 (1.80) MAX. .004 (0.10) .001 (0.02) .181 (4.60) TYP.
.041 (1.04) .033 (0.84)
MAX. .036 (0.91) MIN.
.013 (0.33) .009 (0.24)
Dimensions: inches (mm)
TC1108-2 1/25/00
2001 Microchip Technology Inc.
DS21357A
300mA CMOS
TC1108
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rights reserved. 2001 Microchip Technology Incorporated. Printed USA. 1/01
Information contained this publication regarding device applications like intended through suggestion only superseded updates. your responsibility ensure that your application meets with your specifications. representation warranty given liability assumed Microchip Technology Incorporated with respect accuracy such information, infringement patents other intellectual property rights arising from such otherwise. products critical components life support systems authorized except with express written approval Microchip. licenses conveyed, implicitly otherwise, except maybe explicitly expressed herein, under intellectual property rights. Microchip logo name registered trademarks Microchip Technology Inc. U.S.A. other countries. rights reserved. other trademarks mentioned herein property their respective companies.
2001 Microchip Technology Inc.
TC1108-2 1/25/00 DS21357A

300mA CMOS Extremely Supply Current (50µA, Typ.) Very Dropout Vol

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