TC2117 800mA Fixed Low Dropout Positive Regulator Features General Description • • • • • • • The TC2117 is a fixed, high accuracy (typically ±0.5%) CMOS low dropout regulator. Designed specifically for battery operated systems, the TC2117’s CMOS construction eliminates wasted ground current, significantly extending battery life. Total supply current is typically 80µA at full load (20 to 60 times lower than in bipolar regulators). Fixed Output Voltages: 1.8V, 2.5V, 3.0V, 3.3V Very Low Dropout Voltage Rated 800mA Output Current High Output Voltage Accuracy Standard or Custom Output Voltages Over-Current and Over-Temperature Protection Space Saving SOT-223 Package Applications • • • • • • 5V to 3.3V Linear Regulator Portable Computers Instrumentation Battery Operated Systems Linear Post-Regulator for SMPS Core Voltage Supply for FPGAs, PLDs, CPUs, DSPs TC2117 key features include ultra low noise, very low dropout voltage (typically 450mV at full load), and fast response to step changes in load. The TC2117 incorporates both over-temperature and over-current protection. The TC2117 is stable with an output capacitor of only 1µF and has a maximum output current of 800mA. This device is available in 3-Pin SOT-223, and 3-Pin DDPAK packages. Typical Application Device Selection Table VIN Part Number Junction Temperature Range Package TC2117-xxVDB 3-Pin SOT-223 -40°C to +125°C TC2117-xxVEB -40°C to +125°C 3-Pin DDPAK VIN VOUT VOUT TC2117 C1 1µF GND Note: xx indicates output voltages. Available Output Voltages: 1.8, 2.5, 3.0, 3.3. Other output voltages are available. Please contact Microchip Technology Inc. for details. Package Type 3-Pin SOT-223 3-Pin DDPAK Front View Front View 3 2 VOUT 1 Tab is VOUT Tab is VOUT VIN GND 1 2 3 GND VOUT VIN TC2117 TC2117 2002 Microchip Technology Inc. DS21665B-page 1 TC2117 1.0 ELECTRICAL CHARACTERISTICS *Stresses above those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions above those indicated in the operation sections of the specifications is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Absolute Maximum Ratings* Input Voltage .........................................................6.5V Output Voltage.................... (VSS – 0.3) to (VIN + 0.3V) Power Dissipation................Internally Limited (Note 7) Maximum Voltage on Any Pin ......... VIN +0.3V to -0.3V Operating Temperature ............... -40°C < TJ < +125°C Storage temperature .......................... -65°C to +150°C TC2117 ELECTRICAL SPECIFICATIONS Electrical Characteristics: VIN = VR + 1.5V (Note 1), IL = 100µA, CL = 3.3µF, TA = 25°C, unless otherwise specified. Boldface type specifications apply for junction temperatures of -40°C to +125°C. Symbol Parameter VIN Input Operating Voltage IOUTMAX Maximum Output Current VOUT Output Voltage ∆VOUT /∆T VOUT Temperature Coefficient Min Typ Max Units 2.7 — 6.0 V 800 — — mA VR – 2.5% VR – 0.5% VR + 2.5% VR – 2% VR – 0.5% VR + 3% — 40 — V Test Conditions (Note 2) VR > 2.5V VR = 1.8V ppm/°C (Note 3) ∆VOUT /∆VIN Line Regulation — 0.007 0.35 % ∆VOUT /VOUT Load Regulation -0.01 0.002 0 %/mA (VR + 1V) VIN 6V IL = 0.1mA to IOUTMAX (Note 4) VIN - VOUT Dropout Voltage — — — — — — — 20 60 190 340 600 700 890 30 160 480 800 1300 1000 1400 mV VR > 2.5V, IL = 100 µA IL = 100 µA IL = 300 µA IL = 500 µA IL = 800 µA VR = 1.8V, IL = 500 µA IL = 800 µA (Note 5) IDD Supply Current — 80 130 µA IL = 0 PSRR Power Supply Rejection Ratio — 55 — dB F < 120Hz IOUTSC Output Short Circuit Current — 1200 — mA VOUT = 0V ∆VOUT /∆PD Thermal Regulation — 0.04 — V/W (Note 6) eN Output Noise — 300 — nV/√Hz IL = 100mA, F = 10kHz Note 1: VR is the regulator output voltage setting. 2: The minimum VIN has to justify the conditions: VIN ≥ VR + VDROPOUT and VIN ≥ 2.7V for IL = 0.1mA to IOUTMAX. 3: TC VOUT = (VOUTMAX – VOUTMIN) x 106 VOUT x ∆T 4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested over a load range from 0.1mA to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification. 5: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value, measured at a 1.5V differential. 6: Thermal Regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to ILMAX at VIN = 6V for T = 10msec. 7: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature, and the thermal resistance from junction-to-air (i.e., TA, TJ , θJA). Exceeding the maximum allowable power dissipation causes the device to initiate thermal shutdown. Please see Thermal Considerations section of this data sheet for more details. DS21665B-page 2 2002 Microchip Technology Inc. TC2117 2.0 PIN DESCRIPTIONS The descriptions for the pins are listed in Table 2-1. TABLE 2-1: Pin No. (3-Pin SOT-223) (3-Pin DDPAK) PIN FUNCTION TABLE Symbol Description 1 GND Connect this pin to the circuit ground. 2 VOUT Regulated output voltage. 3 VIN Unregulated Input voltage. 2002 Microchip Technology Inc. DS21665B-page 3 TC2117 3.0 DETAILED DESCRIPTION 3.2.2 The TC2117 is a precision, positive output LDO. Unlike bipolar regulators, the TC2117 supply current does not increase proportionally with load current. In addition, VOUT remains stable and within regulation over the entire 0mA to 800mA operating load range. FIGURE 3-1: TYPICAL APPLICATION CIRCUIT VIN C1 1µF VOUT TC2117 VOUT C2 1µF Battery POWER DISSIPATION The amount of power the regulator dissipates is primarily a function of input and output voltage, and output current. The following equation is used to calculate worst case actual power dissipation: EQUATION 3-1: PD ≈ (VINMAX – VOUTMIN)ILOADMAX Where: PD = Worst case actual power dissipation VINMAX = Maximum voltage on VIN VOUTMIN = Maximum regulator output voltage ILOADMAX = Maximum output (load) current GND The maximum allowable power dissipation (Equation 3-2) is a function of the maximum ambient temperature (TAMAX), the maximum allowable die temperature (125°C) and the thermal resistance from junction-to-air (θJA). 3.1 Output Capacitor A 1µF (min) capacitor from VOUT to ground is required. The output capacitor should have an effective series resistance of 0.2Ω to 10Ω. A 1µF capacitor should be connected from VIN to GND if there is more than 10 inches of wire between the regulator and the AC filter capacitor, or if a battery is used as the power source. Aluminum electrolytic or tantalum capacitor types can be used. (Since many aluminum electrolytic capacitors freeze at approximately -30°C, solid tantalums are recommended for applications operating below -25°C.) When operating from sources other than batteries, supply noise rejection and transient response can be improved by increasing the value of the input and output capacitors and employing passive filtering techniques. 3.2 3.2.1 Thermal Considerations THERMAL SHUTDOWN Integrated thermal protection circuitry shuts the regulator off when die temperature exceeds 160°C. The regulator remains off until the die temperature drops to approximately 150°C. EQUATION 3-2: – TAMAX T PDMAX = JMAX θJA Where all terms are previously defined. Table 3-1 shows various values of θJA for the TC2117 mounted on a 1/16 inch, 2-layer PCB with 1 oz. copper foil. TABLE 3-1: THERMAL RESISTANCE GUIDELINES FOR TC2117 IN 3-PIN SOT-223 PACKAGE Copper Area (Topside)* Copper Area (Backside) Board Area Thermal Resistance 2500 sq mm 2500 sq mm 2500 sq mm 45°C/W 1000 sq mm 2500 sq mm 2500 sq mm 45°C/W 225 sq mm 2500 sq mm 2500 sq mm 53°C/W 100 sq mm 2500 sq mm 2500 sq mm 59°C/W 1000 sq mm 1000 sq mm 1000 sq mm 52°C/W 1000 sq mm 0 sq mm 1000 sq mm 55°C/W *Tab of device attached to topside copper. DS21665B-page 4 2002 Microchip Technology Inc. TC2117 TABLE 3-2: THERMAL RESISTANCE GUIDELINES FOR TC2117 IN 3-PIN DDPAK PACKAGE Copper Area (Topside)* Copper Area (Backside) Board Area Thermal Resistance (θJA) 2500 sq mm 2500 sq mm 2500 sq mm 25°C/W 1000 sq mm 2500 sq mm 2500 sq mm 27°C/W 125 sq mm 2500 sq mm 2500 sq mm 35°C/W Actual power dissipation: PD ≈ (VINMAX – VOUTMIN)ILOADMAX = [(5.0 x 1.05) – (3.3 x .995)] 400 x 10-3 = 786mW Maximum allowable power dissipation: PDMAX = (TJMAX – TAMAX) θJA = (125 – 55) 59 = 1.186mW *Tab of device attached to topside copper. Equation 3-1 can be used in conjunction with Equation 3-2 to ensure regulator thermal operation is within limits. For example: Given: VINMAX = 5.0V ± 5% VOUTMIN = 3.3V ± 0.5% ILOADMAX = 400mA In this example, the TC2117 dissipates a maximum of only 786mW; below the allowable limit of 1.186mW. In a similar manner, Equation 3-1 and Equation 3-2 can be used to calculate maximum current and/or input voltage limits. TJMAX = 125°C TAMAX = 55°C θJA = 59°C/W (SOT-223) Find: 1. Actual power dissipation 2. Maximum allowable dissipation 2002 Microchip Technology Inc. DS21665B-page 5 TC2117 TYPICAL CHARACTERISTICS The graphs and tables provided following this note are a statistical summary based on a limited number of samples and are provided for informational purposes only. The performance characteristics listed herein are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified operating range (e.g., outside specified power supply range) and therefore outside the warranted range. Line Regulation vs. Temperature 10.0 LINE REGULATION (%) CIN = 1µF COUT = 1µF V IN = 6.0V VOUT = 5V I OUT = 100mA VIN = 3.5V to 6.0V VOUT = 2.5V IOUT = 0.1mA 0.018 0.016 NOISE (µV√HZ) 0.014 0.012 0.010 0.008 0.006 1.0 0.1 0.004 0.002 0.000 -40°C 0°C 25°C 70°C 85°C 0.0 0.01 125°C TEMPERATURE (°C) DROPOUT VOLTAGE (V) 120 IDD (µA) 105 VOUT = 5V 90 75 VOUT = 2.5V 60 45 30 0.000 70°C 85°C 125°C -20 100 0.0080 0.0070 0.0060 0.0050 VOUT = 3V 0.0030 0.0020 0.0010 0°C 25°C -40°C 125°C ILOAD = 0.1mA 3.010 3.000 0°C 85°C 3.0V VOUT vs. Temperature 3.030 3.020 70°C 25°C VOUT = 3V 70°C TEMPERATURE (°C) 125°C ILOAD = 300mA 2.990 2.980 ILOAD = 500mA 2.970 2.960 2.950 ILOAD = 800mA 2.940 2.930 0 100 200 300 400 500 600 700 800 Load Step Response VIN = 4.0V VOUT = 3.0V CIN = 1µF Ceramic COUT = 10µF Tantalum (0.25Ω ESR) IOUT = 6mA to 600mA VINDC = 4V IINAC = 50mVp-p VOUTDC = 3V 1mA to 800mA 0.0040 0.0100 -40°C 1000 ILOAD (mA) Power Supply Rejection Ratio -10 85°C 0.200 0.150 0.100 0.050 25°C 10 0.250 0 TEMPERATURE (°C) PSRR (dB) 0.600 0.550 0.500 0.450 0.400 0.350 0.300 15 -40°C 0°C 1 0.0090 Dropout Voltage vs. ILOAD VIN = VOUT +1V IOUT = 0.1mA 135 0.01 0.0100 FREQUENCY (kHz) IDD vs. Temperature 150 Load Regulation vs. Temperature Output Noise vs. Frequency 0.020 LOAD REGULATION %/mA Note: VOUT (V) 4.0 -30 2.920 -40°C 0°C 25°C 70°C 85°C 125°C TEMPERATURE (°C) Line Step Response IOUT = 300mA VIN = 4.0V to 5.0V COUT = 10µF Tantalum (0.25Ω ESR) CIN = NA 50mV/DIV -40 IOUT = 60mA COUT = 10µF Tantalum -50 VOUT 600mA/DIV -60 -70 10 100 1k 10k 100k 50mV/DIV 1M FREQUENCY (Hz) DS21665B-page 6 2002 Microchip Technology Inc. TC2117 5.0 PACKAGING INFORMATION 5.1 Package Marking Information Package marking information not available at this time. 5.2 Taping Information Component Taping Orientation for 3-Pin SOT-223 Devices User Direction of Feed Device Marking W PIN 1 P Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size Package Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 12 mm 8 mm 4000 13 in 3-Pin SOT-223 Component Taping Orientation for 3-Pin DDPAK Devices PIN 1 User Direction of Feed Device Marking W P Standard Reel Component Orientation for TR Suffix Device (Mark Right Side Up) Carrier Tape, Number of Components Per Reel and Reel Size Package 3-Pin DDPAK 2002 Microchip Technology Inc. Carrier Width (W) Pitch (P) Part Per Full Reel Reel Size 24 mm 16 mm 750 13 in DS21665B-page 7 TC2117 5.3 Packaging 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) .041 (1.04) .033 (0.84) PIN 1 .091 (2.30) TYP. .031 (0.80) .024 (0.60) .071 (1.80) MAX. .013 (0.33) .009 (0.24) 10° MAX. .004 (0.10) .001 (0.02) .181 (4.60) TYP. .036 (0.91) MIN. Dimensions: inches (mm) 3-Pin DDPAK .183 (4.65) .170 (4.32) .410 (10.41) .385 (9.78) .067 (1.70) .045 (1.14) .055 (1.40) .045 (1.14) 3° - 7° (5x) .370 (9.40) .330 (8.38) .605 (15.37) .549 (13.95) .010 (0.25) .000 (0.00) .051 (1.30) .049 (1.24) .026 (0.66) .014 (0.36) .110 (2.79) .068 (1.72) .037 (0.94) .026 (0.66) PIN 1 .100 (2.54) TYP. 8° MAX. Dimensions: inches (mm) DS21665B-page 8 2002 Microchip Technology Inc. TC2117 NOTES: 2002 Microchip Technology Inc. DS21665B-page 9 TC2117 SALES AND SUPPORT Data Sheets Products supported by a preliminary Data Sheet may have an errata sheet describing minor operational differences and recommended workarounds. To determine if an errata sheet exists for a particular device, please contact one of the following: 1. 2. 3. Your local Microchip sales office The Microchip Corporate Literature Center U.S. FAX: (480) 792-7277 The Microchip Worldwide Site (www.microchip.com) Please specify which device, revision of silicon and Data Sheet (include Literature #) you are using. New Customer Notification System Register on our web site (www.microchip.com/cn) to receive the most current information on our products. DS21665B-page 10 2002 Microchip Technology Inc. TC2117 Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchip’s products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, under any intellectual property rights. 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Le Colleoni 1 20041 Agrate Brianza Milan, Italy Tel: 39-039-65791-1 Fax: 39-039-6899883 United Kingdom Arizona Microchip Technology Ltd. 505 Eskdale Road Winnersh Triangle Wokingham Berkshire, England RG41 5TU Tel: 44 118 921 5869 Fax: 44-118 921-5820 03/01/02 *DS21665B* DS21665B-page 12 2002 Microchip Technology Inc.