500mA Fixed Output CMOS Very Dropout Voltage 500mA Output Current
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TC1262
500mA Fixed Output CMOS
Very Dropout Voltage 500mA Output Current High Output Voltage Accuracy Standard Custom Output Voltages Over Current Over Temperature Protection
Package Type
3-Pin TO-220
3-Pin DDPAK
Front View
TC1262
TC1262
Applications
Battery Operated Systems Portable Computers Medical Instruments Instrumentation Cellular/GSM/PHS Phones Linear Post-Regulators SMPS Pagers
VOUT
Front View
VOUT
Device Selection Table
Part Number TC1262-xxVDB TC1262-xxVAB TC1262-xxVEB Package 3-Pin SOT-223 3-Pin TO-220 3-Pin DDPAK Junction Temp. Range -40°C +125°C -40°C +125°C -40°C +125°C
TC1262
General Description
TC1262 fixed output, high accuracy (typically ±0.5%) CMOS dropout regulator. Designed specifically battery-operated systems, TC1262's CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current typically 80µA full load times lower than bipolar regulators). TC1262 features include ultra noise operation, very dropout voltage (typically 350mV full load), fast response step changes load. TC1262 incorporates both over temperature over current protection. TC1262 stable with output capacitor only maximum output current 500mA. available 3-Pin SOT-223, 3-Pin TO-220 3-Pin DDPAK packages.
NOTE: indicates output voltages. Available Output Voltages: 2.5, 2.8, 3.0, 3.3, 5.0. Other output voltages available. Please contact Microchip Technology Inc. details.
Typical Application
VOUT VOUT
TC1262
2002 Microchip Technology Inc.
DS21373B-page
VOUT
3-Pin SOT-223
TC1262
ELECTRICAL CHARACTERISTICS
*Stresses above those listed under "Absolute Maximum Ratings" cause permanent damage device. These stress ratings only functional operation device these other conditions above those indicated operation sections specifications implied. Exposure Absolute Maximum Rating conditions extended periods affect device reliability.
Absolute Maximum Ratings*
Input Voltage .6.5V Output Voltage. (VSS 0.3V) (VIN 0.3V) Power Dissipation.Internally Limited (Note Maximum Voltage +0.3V -0.3V Operating Temperature Range. -40°C 125°C Storage Temperature. -65°C +150°C
TC1262 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VOUT 100µA, 3.3µF, 25°C, unless otherwise noted. Boldface type specifications apply junction temperatures -40°C +125°C. Symbol IOUTMAX VOUT VOUT/T VOUT/VIN VOUT/VOUT VIN-VOUT Parameter Input Operating Voltage Maximum Output Current Output Voltage VOUT Temperature Coefficient Line Regulation Load Regulation Dropout Voltage 2.5% 0.35 0.01 Units ppm/°C %/mA Note Note 0.1mA IOUTMAX (Note 100µA 100mA 300mA 500mA (Note 1kHz VOUT Note IOUTMAX, 10kHz Note Test Conditions
±0.5% 2.5% .003 0.002 1200 0.04
PSRR IOUTSC VOUT/PD
Note
Supply Current Power Supply Rejection Ratio Output Short Circuit Current Thermal Regulation Output Noise
nV/Hz
regulator output voltage setting. VOUT (VOUT VOUT MIN) 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 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 Section Thermal Considerations more details. minimum justify conditions: VDROPOUT 2.7V 0.1mA IOUTMAX.
DS21373B-page
2002 Microchip Technology Inc.
TC1262
DESCRIPTIONS
descriptions pins listed Table 2-1.
TABLE 2-1:
(3-Pin SOT-223) (3-Pin TO-220) (3-Pin DDPAK)
FUNCTION TABLE
Symbol
Description
VOUT
Unregulated supply input. Ground terminal. Regulated voltage output.
DETAILED DESCRIPTION
Output Capacitor
TC1262 precision, fixed output LDO. Unlike bipolar regulators, TC1262's supply current does increase with load current. addition, VOUT remains stable within regulation over entire ILOADMAX load current range important consideration CMOS battery back-up applications). Figure shows typical application circuit.
FIGURE 3-1:
TYPICAL APPLICATION CIRCUIT
VOUT VOUT
Battery
TC1262
(min) capacitor from VOUT ground required. output capacitor should have effective series resistance greater than less than resonant frequency above 1MHz. 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.
2002 Microchip Technology Inc.
DS21373B-page
TC1262
THERMAL CONSIDERATIONS
Thermal Shutdown
TABLE 4-2:
Integrated thermal protection circuitry shuts regulator when temperature exceeds 160°C. regulator remains until temperature drops approximately 150°C.
THERMAL RESISTANCE GUIDELINES TC1262 3-PIN DDPAK/TO-220 PACKAGE
Copper Area (Backside) Board Area Thermal Resistance (JA) 25°C/W 27°C/W 35°C/W
Copper Area (Topside)*
Power Dissipation
2500 2500 2500 1000 2500 2500 2500 2500
amount power regulator dissipates primarily function input output voltage, output current. following equation used calculate worst case actual power dissipation:
*Tab device attached topside copper Equation used conjunction with Equation ensure regulator thermal operation within limits. example: Given: VINMAX 3.3V VOUTMIN 2.7V 0.5% ILOADMAX 275mA TJMAX TAMAX 125°C 95°C 59°C/W (SOT-223)
EQUATION 4-1:
(VINMAX VOUTMIN)ILOADMAX Where: VINMAX VOUTMIN ILOADMAX Worst case actual power dissipation Maximum voltage Minimum regulator output voltage Maximum output (load) current
maximum allowable power dissipation (Equation 4-2) function maximum ambient temperature (TAMAX), maximum allowable temperature (TJMAX) thermal resistance from junction-to-air (JA).
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: PDMAX (TJMAX TAMAX) (125 508mW this example, TC1262 dissipates maximum 260mW; below allowable limit 508mW. similar manner, Equation Equation used calculate maximum current and/or input voltage limits. example, maximum allowable VIN, found sustituting maximum allowable power dissipation 508mW into Equation 4-1, from which VINMAX 4.6V.
EQUATION 4-2:
PDMAX (TJMAX TAMAX) Where terms previously defined. Table Table show various values TC1262 packages.
TABLE 4-1:
THERMAL RESISTANCE GUIDELINES TC1262 SOT-223 PACKAGE
Copper Area (Backside) Board Area Thermal Resistance (JA) 45°C/W 45°C/W 53°C/W 59°C/W 52°C/W 55°C/W
Copper Area (Topside)*
2500 2500 2500 1000 2500 2500 1000 2500 2500 2500 2500 1000
1000 1000 1000
*Tab device attached topside copper
DS21373B-page
2002 Microchip Technology Inc.
TC1262
Note:
TYPICAL CHARACTERISTICS
graphs tables provided following this note statistical summary based limited number samples provided informational purposes only. performance characteristics listed herein tested guaranteed. some graphs tables, data presented outside specified operating range (e.g., outside specified power supply range) therefore outside warranted range.
Line Regulation Temperature
0.020 0.018 LINE REGULATION 0.016 NOISE (µV/Hz) 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 10.0
Output Noise Frequency
RLOAD COUT
Load Regulation Temperature
0.0100 0.0090 LOAD REGULATION (%/mA) 0.0080 0.0070 0.0060 0.0050 0.0040 0.0030 0.0020 0.0010 0.0100 -40°C 25°C 70°C 85°C 125°C 2.5V 500mA
500mA
0.01
0.01
1000
TEMPERATURE (°C)
FREQUENCY (kHz)
TEMPERATURE (°C)
Temperature
2.5V Dropout Voltage ILOAD
0.50 125°C 0.50 85°C 70°C 0.30 25°C 0.40 85°C 0.30 70°C 25°C 0.20 125°C
LOAD
DROPOUT VOLTAGE
-40°C
2.5V
0.20 -40°C 0.10
DROPOUT VOLTAGE
0.40
(µA)
0.10 -40°C
0.00 25°C 70°C 85°C 125°C TEMPERATURE (°C) ILOAD (mA)
0.00 ILOAD (mA)
2.5V VOUT Temperature
2.70 2.50 2.30 VOUT VOUT 2.10 1.90 1.70 1.50 -40°C 300mA 500mA 0.1mA 5.20 5.10 5.00 4.90 4.80 4.70 4.60 4.50 4.40 4.30
5.0V VOUT Temperature
0.1mA
25°C
70°C
85°C
125°C
4.20 4.10 4.00 -40°C
25°C
70°C
85°C
125°C
TEMPERATURE (°C)
TEMPERATURE (°C)
2002 Microchip Technology Inc.
DS21373B-page
TC1262
PACKAGING INFORMATION
Package Marking Information
Package marking data available this time.
Taping Form
Component Taping Orientation 3-Pin SOT-223 Devices
User Direction Feed
Device Marking
Standard Reel Component Orientation Suffix Device (Mark Right Side
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
Carrier Tape, Number Components Reel Reel Size
Package Carrier Width Pitch Part Full Reel Reel Size
3-Pin DDPAK
DS21373B-page
2002 Microchip Technology Inc.
TC1262
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. .031 (0.80) .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)
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) Dimensions: inches (mm)
.020 (0.51) .012 (0.30)
.115 (2.92) .095 (2.41)
2002 Microchip Technology Inc.
DS21373B-page
TC1262
Package Dimensions (Continued)
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. MAX. Dimensions: inches (mm) .026 (0.66) .014 (0.36) .110 (2.79) .068 (1.72) .183 (4.65) .170 (4.32)
.055 (1.40) .045 (1.14)
.370 (9.40) .330 (8.38) .605 (15.37) .549 (13.95)
DS21373B-page
2002 Microchip Technology Inc.
TC1262
SALES SUPPORT
Data Sheets Products supported preliminary Data Sheet have errata sheet describing minor operational differences recommended workarounds. determine errata sheet exists particular device, please contact following: Your local Microchip sales office Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 Microchip Worldwide Site (www.microchip.com)
Please specify which device, revision silicon Data Sheet (include Literature using. Customer Notification System Register site (www.microchip.com/cn) receive most current information products.
2002 Microchip Technology Inc.
DS21373B-page
TC1262
NOTES:
DS21373B-page
2002 Microchip Technology Inc.
TC1262
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. Microchip's products critical components life support systems authorized except with express written approval Microchip. licenses conveyed, implicitly otherwise, under intellectual property rights.
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2002 Microchip Technology Inc.
DS21373B-page
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DS21373B-page
2002 Microchip Technology Inc.
*B37312SD*
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