Very Dropout Voltage Guaranteed 800mA Output High Output Voltage Accur

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Very Dropout Voltage Guaranteed 800mA Output High Output Voltage Accur

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TC1264 800mA Fixed Output CMOS
Very Dropout Voltage Guaranteed 800mA Output High Output Voltage Accuracy Standard Custom Output Voltages Over-Current Over-Temperature Protection
TC1264 fixed output, high accuracy (typically ±0.5%) CMOS dropout regulator. Designed specifically battery-operated systems, TC1264's CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current typically full load times lower than bipolar regulators!). TC1264 features include ultra noise, very dropout voltage (typically 450mV full load), fast response step changes load. TC1264 incorporates both over-temperature over-current protection. TC1264 stable with output capacitor only maximum output current 800mA. available 3Pin SOT-223, 3-Pin TO-220, 3-Pin DDPAK packages.
APPLICATIONS
Battery-Operated Systems Portable Computers Medical Instruments Instrumentation Cellular Phones Linear Post-Regulator SMPS Pagers
TYPICAL APPLICATION
VOUT VOUT
ORDERING INFORMATION
Part Number TC1264-xxVDB TC1264-xxVAB TC1264-xxVEB Junction Temperature Range 40°C +125°C 40°C +125°C 40°C +125°C
Package 3-Pin SOT-223 3-Pin TO-220 3-Pin DDPAK
TC1264
CONFIGURATION
3-Pin TO-220
Available Output Voltages: 1.8, 2.5, 3.0, indicates ouput voltages
3-Pin DDPAK
FRONT VIEW
Other output voltages available. Please contact Microchip Technology Inc. details.
TC1264
TC1264
VOUT
FRONT VIEW
VOUT
TC1264
2001 Microchip Technology Inc.
DS21375A
VOUT
3-Pin SOT-223
TC1264-3 2/9/00
800mA Fixed Output CMOS
TC1264
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:
1.5V (Note 100µA, 3.3µF, 25°C, unless otherwise specified. BOLDFACE type specifications apply junction temperatures 40°C +125°C.
Symbol
IOUTMAX VOUT
Parameter
Input Operating Voltage Maximum Output Current Output Voltage
Test Conditions
(Note 2.5V 1.8V 0.1mA 800mA (Note Note 0.1mA IOUTMAX (Note 2.5V, 100µA 100mA 300mA 500mA 800mA 1.8V, 500mA 800mA (Note 1kHz VOUT Note IOUTMAX, 10kHz
Units
ppm/°C %/mA
VOUT/T VOUT/VIN VOUT/VOUT VOUT
VOUT Temperature Coefficient Line Regulation Load Regulation Dropout Voltage
2.5% 0.5% 2.5% 0.5% 0.007 0.35 -0.01 0.002 1300 1000 1400 1200 0.04
PSRR IOUTSC VOUT/PD
NOTES:
Supply Current Power Supply Rejection Ratio Output Short Circuit Current Thermal Regulation Output Noise
nV/Hz
regulator output voltage setting. minimum justify conditions: VIN> VDROPOUT 2.7V 0.1mA IOUTMAX. This accuracy represents worst case over entire output current temperature range. 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 1.5V differential. Thermal Regulation defined change output voltage time after change power dissipation applied, excluding load line regulation effects. Specifications current pulse equal ILMAX msec. 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.
TC1264-3
2/9/00
2001 Microchip Technology Inc.
DS21375A
800mA Fixed Output CMOS
TC1264
DETAILED DESCRIPTION
TC1264 precision, fixed output LDO. Unlike bipolar regulators, TC1264 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
TC1264
maximum allowable power dissipation (Equation function maximum ambient temperature (TAMAX), maximum allowable temperature (125°C) thermal resistance from junction-to-air JA). PDMAX (TJMAX TAMAX)
Where terms previously defined.
Figure Typical Application Circuit Equation
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.
Table shows various values TC1264 mounted 1/16 inch, 2-layer with copper foil. Table Thermal Resistance Guidelines TC1264 3-Pin SOT-223 Package 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
Thermal Considerations
Thermal Shutdown Integrated thermal protection circuitry shuts regulator when temperature exceeds 160°C. regulator remains until temperature drops approximately 150°C. Power Dissipation amount power regulator dissipates primarily function input output voltage, output current. following equation used calculate worst case actual power dissipation:
NOTES: *Tab device attached topside copper
Table Thermal Resistance Guidelines TC1264 3-Pin DDPAK/TO-220 Package Copper Area (Topside)* 2500 1000 Copper Area (Backside) 2500 2500 2500 Board Area 2500 2500 2500 Thermal Resistance 25°C/W 27°C/W 35°C/W
NOTES: *Tab device attached topside copper
2001 Microchip Technology Inc.
DS21375A
TC1264-3 2/9/00
800mA Fixed Output CMOS
TC1264
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 (SOT-223)
FIND: Actual power dissipation Maximum allowable dissipation Actual power dissipation: (VINMAX VOUTMIN)ILOADMAX [(3.3 1.1) (2.7 .995)]275 10-3 260mW Maximum allowable power dissipation: (TJMAX TAMAX) PDMAX
(125 508mW
this example, TC1264 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.
TC1264-3
2/9/00
2001 Microchip Technology Inc.
DS21375A
800mA Fixed Output CMOS
TC1264
TYPICAL CHARACTERISTICS
Line Regulation Temperature 0.020 0.018 0.016 10.0
Output Noise Frequency 0.0100 RLOAD COUT 0.0090 0.0080 0.0070 0.0060 0.0050 0.0040 0.0030 0.0020 0.0010
Load Regulation Temperature
0.014 0.012 0.010 0.008 0.006 0.004 0.002 0.000 -40°C 25°C 70°C 85°C 125°C
LOAD REGULATION %/mA
LINE REGULATION
NOISE (µV//
VOUT
800mA
0.01
0.01
1000
0.0100 -40°C
25°C
70°C
85°C
125°C
TEMPERATURE (°C) Temperature 0.600 0.550 0.500 0.450 0.400 0.350 0.300 0.250 0.200 0.150 0.100 0.050 0.000 25°C 70°C 85°C 125°C TEMPERATURE (°C) Power Supply Rejection Ratio -30dB -35dB VOUT RLOAD -40dB VINAC 50mVp-p -45dB -50dB -55dB -60dB -65dB -70dB -75dB -80dB 100K FREQUENCY (Hz) COUT
FREQUENCY (KHz)
TEMPERATURE (°C) 3.0V VOUT Temperature 3.030 3.020 3.010 3.000 ILOAD 0.1mA
LOAD
125°C
DROPOUT VOLTAGE
-40°C
VOUT
2.990 2.980 2.970 2.960 2.950 2.940 2.930 2.920 -40°C
ILOAD 300mA ILOAD 500mA
(µA)
VOUT
ILOAD 800mA
ILOAD (mA)
25°C
70°C
85°C 125°C
TEMPERATURE (°C)
PSRR (dB)
2001 Microchip Technology Inc.
DS21375A
TC1264-3 2/9/00
800mA Fixed Output CMOS
TC1264
TAPING FORMS
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
Component Taping Orientation 3-Pin DDPAK Devices
User Direction Feed
Device Marking
Standard Reel Component Orientation Suffix Device (Mark Right Side Package Carrier Width
User Direction Feed
Device Marking
Reverse Reel Component Orientation Suffix Device (Mark Upside Down)
Carrier Tape, Number Components Reel Reel Size
Pitch Part Full Reel Reel Size
3-Pin DDPAK
TC1264-3
2/9/00
2001 Microchip Technology Inc.
DS21375A
800mA Fixed Output CMOS
TC1264
PACKAGE DIMENSIONS
3-Pin DDPAK
.410 (10.41) .385 (9.78) .067 (1.70) .045 (1.14) (5x) .010 (0.25) .000 (0.00) .051 (1.30) .049 (1.24) .037 (0.94) .026 (0.66) .100 (2.54) TYP. 0.26 (0.66) 0.14 (0.36) .110 (2.79) .068 (1.72) .183 (4.65) .170 (4.32)
.055 (1.40) .045 (1.14)
.370 (9.40) .329 (8.38) .605 (15.37) .549 (13.95)
3-Pin TO-220
.185 (4.70) .165 (4.19) .113 (2.87) .103 (2.62) .410 (10.41) .357 (9.06) .156 (3.96) .146 (3.71) DIA.
.055 (1.40) .045 (1.14)
.258 (6.55) .230 (5.84) .594 (15.09) .569 (14.45) 7.5° PLCS.
.244 (6.20) .234 (5.94) .560 (14.22) .518 (13.16) .055 (1.40) .045 (1.14) .037 (0.94) .027 (0.69) .105 (2.67) .095 (2.41) .205 (5.21) .195 (4.95)
.020 (0.51) .012 (0.30)
.115 (2.92) .095 (2.41)
Dimensions: inches (mm)
2001 Microchip Technology Inc.
DS21375A
TC1264-3 2/9/00
800mA Fixed Output CMOS
TC1264
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)
TC1264-3
2/9/00
2001 Microchip Technology Inc.
DS21375A
800mA Fixed Output CMOS
TC1264
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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.
DS21375A
TC1264-3 2/9/00

Very Dropout Voltage Guaranteed 800mA Output High Output Voltage Accur

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