50mA 100mA CMOS LDOs with Shutdown Extremely Ground Current Longe
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TC1223/TC1224
50mA 100mA CMOS LDOs with Shutdown
Extremely Ground Current Longer Battery Life Very Dropout Voltage Choice 50mA 100mA Output (TC1223, TC1224, Respectively) High Output Voltage Accuracy Standard Custom Output Voltages Power Saving Shutdown Mode Over Current Over Temperature Protection Space-Saving 5-Pin SOT-23A Package Compatible Upgrades Bipolar Regulators
General Description
TC1223 TC1224 high accuracy (typically ±0.5%) CMOS upgrades older (bipolar) dropout regulators such LP2980. Designed specifically battery-operated systems, devices' CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current typically 50µA full load times lower than bipolar regulators). devices' features include ultra noise operation; very dropout voltage (typically 85mV, TC1223 180mV, TC1224 full load) fast response step changes load. Supply current reduced 0.5µA (max) VOUT falls zero when shutdown input low. devices incorporate both over temperature over current protection. TC1223 TC1224 stable with output capacitor only have maximum output current 50mA 100mA respectively. higher output current versions, please TC1107, TC1108 TC1173 (IOUT 300mA) data sheets.
Applications
Battery Operated Systems Portable Computers Medical Instruments Instrumentation Cellular/GSM/PHS Phones Linear Post-Regulators SMPS Pagers
Typical Application
VOUT VOUT
Device Selection Table
Part Number TC1223-xxVCT TC1224-xxVCT Package 5-Pin SOT-23A 5-Pin SOT-23A Junction Temp. Range -40°C +125°C -40°C +125°C
TC1223 TC1224
NOTE: indicates output voltages Available Output Voltages: 2.5, 2.7, 2.8, 2.85, 3.0, 3.3, 3.6, 4.0, 5.0. Other output voltages available. Please contact Microchip Technology Inc. details.
SHDN
Package Type
5-Pin SOT-23A
VOUT
Shutdown Control (from Power Control Logic)
TC1223 TC1224
SHDN
NOTE: 5-Pin SOT-23A equivalent EIAJ (SC-74A)
2002 Microchip Technology Inc.
DS21368B-page
TC1223/TC1224
ELECTRICAL SPECIFICATIONS
Absolute Maximum Ratings*
Input Voltage .6.5V Output Voltage. (-0.3V) (VIN 0.3V) Power Dissipation. Internally Limited Maximum Voltage +0.3V -0.3V Operating Temperature Range. -40°C 125°C Storage Temperature. -65°C +150°C
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.
TC1223/TC1224 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VOUT 100µA, 3.3µF, SHDN 25°C, unless otherwise noted. Boldface type specifications apply junction temperatures -40°C +125°C. Symbol IOUTMAX VOUT TCVOUT 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% ±0.5% 0.05 0.05 0.04 2.5% 0.35 Units ppm/°C Test Conditions Note TC1223 TC1224 Note Note 0.1mA IOUT (Note 100µA 20mA 50mA 100mA (Note SHDN VIH, (Note SHDN 1kHz VOUT Notes
TC1224 IINSD PSRR IOUTSC VOUT/PD SHDN Input
Note
Supply Current Shutdown Supply Current Power Supply Rejection Ratio Output Short Circuit Current Thermal Regulation Thermal Shutdown Temperature Thermal Shutdown Hysteresis Output Noise SHDN Input High Threshold SHDN Input Threshold
nV/Hz %VIN %VIN
IOUT 2.5V 6.5V 2.5V 6.5V
regulator output voltage setting. example: 2.5V, 2.7V, 2.85V, 3.0V, 3.3V, 3.6V, 4.0V, 5.0V. 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 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. Apply Junction Temperatures -40°C +85°C. minimum justify conditions: VDROPOUT 2.7V 0.1mA MAX.
DS21368B-page
2002 Microchip Technology Inc.
TC1223/TC1224
DESCRIPTIONS
descriptions pins listed Table 2-1.
TABLE 2-1:
(5-Pin SOT-23A)
FUNCTION TABLE
Symbol SHDN Unregulated supply input. Ground terminal. Shutdown control input. regulator fully enabled when logic high applied this input. regulator enters shutdown when logic applied this input. During shutdown, output voltage falls zero supply current reduced 0.5µA (max). connect. Regulated voltage output. Description
VOUT
2002 Microchip Technology Inc.
DS21368B-page
TC1223/TC1224
DETAILED DESCRIPTION
Output Capacitor
TC1223 TC1224 precision fixed output voltage regulators. Unlike bipolar regulators, TC1223 TC1224's supply current does increase with load current. addition, VOUT remains stable within regulation over entire IOUTMAX operating load current range, important consideration CMOS battery back-up applications). Figure shows typical application circuit. regulator enabled time shutdown input (SHDN) above VIH, shutdown (disabled) when SHDN below VIL. SHDN controlled CMOS logic gate, port microcontroller. SHDN input required, should connected directly input supply. While shutdown, supply current decreases 0.05µA (typical) VOUT falls zero volts. (min) capacitor from VOUT ground recommended. output capacitor should have effective series resistance greater than less than 5.0, 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.
FIGURE 3-1:
TYPICAL APPLICATION CIRCUIT
VOUT VOUT
Battery
TC1223 TC1224
SHDN
Shutdown Control CMOS Logic unused)
DS21368B-page
2002 Microchip Technology Inc.
TC1223/TC1224
THERMAL CONSIDERATIONS
Thermal Shutdown
Equation used conjunction with Equation ensure regulator thermal operation within limits. example: Given: VINMAX 3.0V ±10% VOUTMIN 2.7V 2.5% ILOADMAX 40mA TJMAX TAMAX 125°C 55°C
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:
Find: Actual power dissipation Maximum allowable dissipation Actual power dissipation: (VINMAX VOUTMIN)ILOADMAX [(3.0 1.1) (2.7 .975)]40 10-3 26.7mW Maximum allowable power dissipation:
EQUATION 4-1:
(VINMAX OUTMIN)ILOADMAX Where: VOUT ILOAD 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). 5-Pin SOT-23A package approximately 220°C/Watt.
PDMAX (TJMAX TAMAX) (125 318mW this example, TC1223 dissipates maximum 26.7mW; below allowable limit 318mW. similar manner, Equation Equation used calculate maximum current and/or input voltage limits.
EQUATION 4-2:
PDMAX (TJMAX TAMAX) Where terms previously defined.
Layout Considerations
primary path heat conduction package package leads. Therefore, layouts having ground plane, wide traces pads, wide power supply lines combine lower therefore increase maximum allowable power dissipation limit.
2002 Microchip Technology Inc.
DS21368B-page
TC1223/TC1224
Note:
TYPICAL CHARACTERISTICS
(Unless Otherwise Specified, Parts Measured Temperature 25°C) 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.
0.020 0.018
Dropout Voltage Temperature (VOUT 3.3V) ILOAD 10mA
0.100 0.090
DROPOUT VOLTAGE
Dropout Voltage Temperature (VOUT 3.3V) ILOAD 50mA
DROPOUT VOLTAGE
0.016 0.014 0.012 0.010 0.008 0.006 0.004 0.002 0.000 TEMPERATURE (°C)
0.080 0.070 0.060 0.050 0.040 0.030 0.020 0.010 0.000 TEMPERATURE (°C)
COUT
COUT
0.200 0.180
DROPOUT VOLTAGE
Dropout Voltage Temperature (VOUT 3.3V) ILOAD 100mA
CURRENT (µA)
Ground Current (VOUT 3.3V) ILOAD 10mA
0.160 0.140 0.120 0.100 0.080 0.060 0.040 0.020 0.000
COUT
COUT
TEMPERATURE (°C)
Ground Current (VOUT 3.3V) ILOAD 100mA
VOUT (VOUT 3.3V) ILOAD
CURRENT (µA)
VOUT
COUT
COUT
DS21368B-page
2002 Microchip Technology Inc.
TC1223/TC1224
TYPICAL CHARACTERISTICS (CONTINUED)
(Unless Otherwise Specified, Parts Measured Temperature 25°C)
VOUT
VOUT (VOUT 3.3V) ILOAD 100mA
3.320 3.315 3.310 3.305
Output Voltage Temperature (VOUT 3.3V) ILOAD 10mA
VOUT
3.300 3.295 3.290 3.285
COUT
3.280 3.275
COUT 4.3V
TEMPERATURE (°C)
5.025 5.020 5.015
Output Voltage Temperature (VOUT ILOAD 10mA
Temperature Quiescent Current (VOUT ILOAD 10mA
VOUT
5.010 5.005 5.000 4.995 4.990 4.985
CURRENT (µA)
TEMPERATURE (°C)
COUT
TEMPERATURE (°C)
COUT
Output Noise Frequency 10.0 1000 RLOAD COUT COUT
Stability Region Load Current COUT 10µF Stable Region PSRR (dB)
Power Supply Rejection Ratio IOUT 10mA VINDC VINAC 100mVp-p VOUT COUT
NOISE (µV/Hz)
0.01K 0.1K
0.01 100K 1000K FREQUENCY (Hz) LOAD CURRENT (mA)
0.01K 0.1K
100K 1000K FREQUENCY (Hz)
2002 Microchip Technology Inc.
DS21368B-page
TC1223/TC1224
TYPICAL CHARACTERISTICS (CONTINUED)
Measure Rise Time 3.3V Conditions: 1µF, COUT 1µF, ILOAD 100mA, 4.3V, Temp 25°C, Fall Time 184µS Measure Fall Time 3.3V Conditions: 1µF, COUT 1µF, ILOAD 100mA, 4.3V, Temp 25°C, Fall Time 52µS
VSHDN
VSHDN
VOUT
VOUT
Measure Rise Time 5.0V Conditions: 1µF, COUT 1µF, ILOAD 100mA, Temp 25°C, Fall Time 192µS
Measure Fall Time 5.0V Conditions: 1µF, COUT 1µF, ILOAD 100mA, Temp 25°C, Fall Time 88µS
VSHDN
VSHDN
VOUT
VOUT
Thermal Shutdown Response 5.0V Conditions: 0µF, COUT
VOUT
ILOAD increased until temperature reached about 160°C, which time integrated thermal protection circuitry shuts regulator when temperature exceeds approximately 160°C. regulator remains until temperature drops approximately 150°C.
DS21368B-page
2002 Microchip Technology Inc.
TC1223/TC1224
PACKAGING INFORMATION
Package Marking Information
part number code temperature range voltage 2.85 TC1223 Code TC1224 Code
represents year quarter code represents number
Taping Form
Component Taping Orientation 5-Pin SOT-23A (EIAJ SC-74A) 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
5-Pin SOT-23A
3000
2002 Microchip Technology Inc.
DS21368B-page
TC1223/TC1224
Package Dimensions
SOT-23A-5
.075 (1.90) REF.
.122 (3.10) .098 (2.50) .020 (0.50) .012 (0.30) .122 (3.10) .106 (2.70) .057 (1.45) .035 (0.90) .006 (0.15) .000 (0.00)
.071 (1.80) .059 (1.50)
.037 (0.95) REF.
MAX. .024 (0.60) .004 (0.10)
.010 (0.25) .004 (0.09)
Dimensions: inches (mm)
DS21368B-page
2002 Microchip Technology Inc.
TC1223/TC1224
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.
DS21368B-page
TC1223/TC1224
NOTES:
DS21368B-page
2002 Microchip Technology Inc.
TC1223/TC1224
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2002 Microchip Technology Inc.
DS21368B-page
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2002 Microchip Technology Inc.
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