Very Dropout Voltage Guaranteed 500mA Output High Output Voltage Accur
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TC1263 500mA Fixed Output CMOS with Shutdown
Very Dropout Voltage Guaranteed 500mA Output High Output Voltage Accuracy Standard Custom Output Voltages Over-Current Over-Temperature Protection SHDN Input Active Power Management ERROR Output Detect Battery (SOIC Only)
TC1263 fixed output, high accuracy (typically ±0.5%) CMOS dropout regulator. Designed specifically battery-operated systems, TC1263's CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current typically full load times lower than bipolar regulators). TC1263 features include ultra noise, very dropout voltage (typically 350mV full load), fast response step changes load. TC1263 incorporates both over-temperature over-current protection. TC1263 stable with output capacitor only maximum output current 500mA. available 8-Pin SOIC, 5-Pin TO-220, 5-Pin DDPAK packages.
APPLICATIONS
Battery-Operated Systems Portable Computers Medical Instruments Instrumentation Cellular Phones Linear Post-Regulator SMPS Pagers
ORDERING INFORMATION
Part Number TC1263-xxVOA TC1263-xxVAT TC1263-xxVET Package 8-Pin SOIC 5-Pin TO-220 5-Pin DDPAK Junction Temp. Range 40°C +125°C 40°C +125°C 40°C +125°C
CONFIGURATION
5-Pin DDPAK
FRONT VIEW
5-Pin TO-220
Available Output Voltages: 2.5, 2.8, 3.0, 3.3, indicates output voltages
Other output voltages available. Please contact Microchip Technology Inc. details.
TC1263
TC1263
TYPICAL APPLICATION
SHDN VOUT SHDN VOUT
8-Pin SOIC
VOUT BYPASS SHDN ERROR
VOUT
VOUT COUT SHDN
TC1263
SHDN
TC1263
2001 Microchip Technology Inc.
DS21374A
TC1263-2 12/01/00
500mA Fixed Output CMOS with Shutdown TC1263
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:
VOUT 3.3µF, SHDN VIH, 25°C, unless otherwise specified. BOLDFACE type specifications apply junction temperatures 40°C +125°C.
Symbol
IOUTMAX VOUT VOUT/T VOUT/VIN VOUT/VOUT VOUT
Parameter
Input Operating Voltage Maximum Output Current Output Voltage VOUT Temperature Coefficient Line Regulation Load Regulation Dropout Voltage
Test Conditions
(SOIC-8 TBD) Note Note 0.1mA IOUTMAX (Note 100µA 100mA 300mA 500mA (Note SHDN VIH, SHDN 1KHz VOUT Note IOUTMAX
Units
ppm/°C %/mA
0.5% 2.5% 2.5% 0.05 0.35 0.002 0.01 0.05 1200 0.04 1400
ISHDN PSRR IOUTSC VOUT/PD SHDN Input
Supply Current Shutdown Supply Current Power Supply Rejection Ratio Output Short Circuit Current Thermal Regulation Output Noise SHDN Input High Threshold SHDN Input Threshold
nV/Hz %VIN %VIN
ERROR Output (SOIC Only) VMIN VHYS Minimum Operating Voltage Output Logic Voltage ERROR Threshold Voltage ERROR Positive Hysteresis Flows ERROR Note 0.95
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. Hysteresis voltage referenced
TC1263-2 12/01/00
2001 Microchip Technology Inc.
DS21374A
500mA Fixed Output CMOS with Shutdown TC1263
DETAILED DESCRIPTION
TC1263 precision, fixed output LDO. Unlike bipolar regulators, TC1263 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.
BATTERY VOUT VOUT
timing capacitor C3). should chosen maintain ERROR below processor RESET input least msec allow time system stabilize. Pull-up resistor tied VOUT, other voltage less than (VIN 0.3V.)
VOUT
Hysteresis (VH)
TC1263
ERROR
ERROR BATTLOW RESET
SHDN Shutdown Control CMOS Logic unused)
Required Only ERROR used Processor RESET Signal (See Text)
Figure ERROR Output Operation
0.2µF
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: (VINMAX VOUTMIN)ILOADMAX Where: worst case actual power dissipation VINMAX maximum voltage VOUTMIN minimum regulator output voltage ILOADMAX maximum output (load) current
Equation
Figure Typical Application Circuit
Output Capacitor (min) capacitor from VOUT ground required. output capacitor should have effective series resistance less, resonant frequency above MHz. 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. ERROR Output ERROR driven whenever VOUT falls regulation more than (typical). This condition caused input voltage, output current limiting, thermal limiting. ERROR threshold below rated VOUT regardless programmed output voltage value (e.g., ERROR 4.75V (typ) 5.0V regulator 2.85V (typ) 3.0V regulator). ERROR output operation shown Figure Note that ERROR active when VOUT below VTH, inactive when VOUT above shown Figure ERROR used battery flag, processor RESET signal (with addition
2001 Microchip Technology Inc. DS21374A
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.
Equation
TC1263-2 12/01/00
500mA Fixed Output CMOS with Shutdown TC1263
Table shows various values TC1263 mounted 1/16 inch, 2-layer with copper foil. Table Thermal Resistance Guidelines TC1263 8-Pin SOIC Package Copper Area (Topside)* 2500 1000 Copper Area (Backside) 2500 2500 2500 2500 Board Area 2500 2500 2500 2500 Thermal Resistance 60°C/W 60°C/W 68°C/W 74°C/W 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
NOTES: *Pin ground. Device mounted topside.
(125 508mW
Table Thermal Resistance Guidelines TC1263 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
this example, TC1263 dissipates maximum only 260mW; below allowable limit 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.
NOTES: *Tab device attached topside copper
Equation used conjunction with Equation ensure regulator thermal operation within limits. example: GIVEN: VINMAX VOUTMIN ILOAD TAMAX
3.3V 2.7V 0.5% 275mA 95°C 59°C/W
TC1263-2 12/01/00
2001 Microchip Technology Inc.
DS21374A
500mA Fixed Output CMOS with Shutdown TC1263
TYPICAL CHARACTERISTICS
Line Regulation Temperature 0.020 0.018 0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0.000 0.01 0.01 1000 TEMPERATURE Temperature
0.25
Output Noise Frequency 10.0 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
LOAD REGULATION %/mA
LINE REGULATION
NOISE
2.5V
500mA
500mA
0.0100
FREQUENCY (KHz)
TEMPERATURE 5.0V Dropout Voltage ILOAD 0.50 0.40 0.30 0.20 0.10
2.5V Dropout Voltage ILOAD
DROPOUT VOLTAGE
2.5V
0.15
TC1315-4.85
TC1315-5.0
0.05
DROPOUT VOLTAGE
TC1315-3.3
0.00
0.05 0.15 0.25 0.35 0.45
TEMPERATURE 2.5V VOUT Temperature 2.70 2.50 2.30 0.1mA 5.20 5.10 5.00 4.90 4.80 4.70 4.60 4.50 4.40 4.30 4.20 4.10 4.00
IOUT 5.0V VOUT Temperature -30dB 0.1mA
ILOAD (mA) Power Supply Rejection Ratio VOUT -35dB LOAD -40dB VINAC 50mVp-p -45dB
VOUT
2.10 1.90 1.70
300mA 500mA
300mA 500mA
PSRR (dB)
VOUT
-50dB -55dB -60dB -65dB -70dB -75dB COUT
1.50
-80dB 100K
FREQUENCY (KHz)
TEMPERATURE
TEMPERATURE
2001 Microchip Technology Inc.
DS21374A
TC1263-2 12/01/00
500mA Fixed Output CMOS with Shutdown TC1263
TAPING FORM
Component Taping Orientation 8-Pin SOIC (Narrow) Devices
User Direction Feed
User Direction Feed
Standard Reel Component Orientation Suffix Device
Standard Reel Component Orientation Suffix Device
Carrier Tape, Number Components Reel Reel Size
Package Carrier Width Pitch Part Full Reel Reel Size
8-Pin SOIC
2500
Component Taping Orientation 5-Pin DDPAK Devices
User Direction Feed
Device Marking Device Marking
Standard Reel Component Orientation Suffix Device (Mark Right Side Package Carrier Width
User Direction Feed
Reverse Reel Component Orientation Suffix Device (Mark Upside Down)
Carrier Tape, Number Components Reel Reel Size
Pitch Part Full Reel Reel Size
5-Pin DDPAK
TC1263-2 12/01/00
2001 Microchip Technology Inc.
DS21374A
500mA Fixed Output CMOS with Shutdown TC1263
PACKAGE DIMENSIONS
8-Pin SOIC (Narrow)
.157 (3.99) .150 (3.81)
.244 (6.20) .228 (5.79)
.050 (1.27) TYP.
.197 (5.00) .189 (4.80) .069 (1.75) .053 (1.35) .020 (0.51) .010 (0.25) .013 (0.33) .004 (0.10) .010 (0.25) .007 (0.18) .050 (1.27) .016 (0.40)
MAX.
5-Pin TO-220
.185 (4.70) .165 (4.19) .117 (2.97) .103 (2.62) .415 (10.54) .390 (9.91) .156 (3.96) .140 (3.56) DIA. .055 (1.40) .045 (1.14)
.293 (7.44) .204 (5.18) .613 (15.57) .569 (14.45) 7.5° PLCS.
.590 (14.99) .482 (12.24)
.037 (0.95) .025 (0.64) .025 (0.64) .012 (0.30) .072 (1.83) .062 (1.57) .273 (6.93) .263 (6.68) .115 (2.92) .087 (2.21)
Dimensions: inches (mm)
2001 Microchip Technology Inc.
DS21374A
TC1263-2 12/01/00
500mA Fixed Output CMOS with Shutdown TC1263
PACKAGE DIMENSIONS
5-Pin DDPAK
.410 (10.41) .385 (9.78) .067 (1.70) .045 (1.14) (5x) .370 (9.40) .330 (8.38) .605 (15.37) .549 (13.95) .026 (0.66) .014 (0.36) .037 (0.94) .026 (0.66) .067 (1.70) TYP. MAX.
Dimensions: inches (mm)
.183 (4.65) .170 (4.32) .055 (1.40) .045 (1.14)
.010 (0.25) .000 (0.00)
.110 (2.79) .068 (1.72)
TC1263-2 12/01/00
2001 Microchip Technology Inc.
DS21374A
500mA Fixed Output CMOS with Shutdown TC1263
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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.
DS21374A
TC1263-2 12/01/00
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