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Details, datasheet, quote on part number:TC1264-3.3VEBTR
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Datasheet text preview:
TC1264
800mA Fixed Output CMOS LDO
Features
· · · · · Very Low Dropout Voltage 800mA Output Current High Output Voltage Accuracy Standard or Custom Output Voltages Over Current and O ver Temperature Protection
Package Type
3-Pin TO-220
TAB IS GND
3-Pin DDPAK
FRONT VIEW TAB IS GND
TC1264
TC1264
Applications
· · · · · · · Battery Operated Systems Portable Computers Medical Instruments Instrum entation Cellular/GSM/PHS Phones Linear Post-Regulators for SMPS Pagers
1
2
3
1
2
3
V O UT
VIN
GND
3-Pin SOT-223
FRONT VIEW
3 TAB IS GND
VO U T
2
GND
Device Selection Table
Part Number TC1264-xxVDB TC1264-xxVAB TC1264-xxVEB Package 3-Pin SO T-223 3-Pin TO -220 3-Pin DDPAK Junction Temp. Range -40°C to +125°C -40°C to +125°C -40°C to +125°C
1
VIN
TC1264
General Description
The TC1264 is a fixed output, high accuracy (typically ±0.5%) CMOS low dropout regulator. Designed specifically for battery-operated systems, the TC1264's CM OS 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). TC1264 key features include ultra low noise operation, very low dropout voltage (typically 450mV at full load), and fast response to step changes in load. The TC1264 incorporates both over temperature and over current protection. The TC1264 is stable with an output capacitor of only 1µF and has a maximum output current of 800mA. It is available in 3-Pin SOT-223, 3-Pin TO-220 and 3-Pin DDPAK packages.
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.
Typical Application
VIN VIN VOUT C1 1µF VOUT
TC1264
GND
2002 Microchip Technology Inc.
D S21375B-page 1
V O UT
VIN
GND
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TC1264
1 .0 ELECTRICAL CHARACTERISTICS
*Stresses above those listed under "A bsolute 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. E xposur e to Absolute Maximum Rating conditions for extended periods may affect device reliability.
Absolute Maximum Ratings*
Input Voltage ......... 6.5V Output Voltage......... (VSS 0.3V) to (VIN + 0.3V) Power Dissipation....... Internally Limited (Note 8) Maxim um Voltage on Any Pin ........ VIN +0.3V to -0.3V Operating Temperature Range ...... -40°C < TJ < 125°C Storage Temperature .. -65°C to +150°C
TC1264 ELECTR ICAL SPECIFICATIONS
Electrical Characterist ics: VIN = VR + 1.5V, (Note 1), IL = 100µ A , CL = 3.3µ F, TA = 25°C, unless otherwise noted. Boldface type specifications apply for junction temperatures of -40°C to +125°C. Symbol VIN IOUTMAX VOUT Parameter Input Operating Voltage Maximum Output Current Output Voltage Min 2.7 800 Typ -- -- Max 6.0 -- Units V mA V V ppm/°C % %/mA mV VR 2.5V VR = 1.8V IL = 0.1mA to 800mA (Note 3) No te 4 (VR + 1V) VIN 6V IL = 0.1mA to IOU TMAX (Note 5) VR 2.5V, IL = 100µA IL = 100mA IL = 300mA IL = 500mA IL = 800mA VR = 1.8V, IL = 500mA IL = 800mA (Note 6) IL = 0 F 1kHz VOUT = 0V No te 7 IL = IOUTMAX, F = 10kH z Test Conditions No te 2
VR 2.5% VR ± 0.5% VR + 2.5% VR 2% VR ± 0.5% VR + 3% VR 7% -- 40 0.007 0.002 20 50 150 260 450 700 890 80 64 1200 0.04 260 VR + 3% -- 0.35 0 30 160 480 800 1300 1000 1400 130 -- -- -- -- -- -- -0.01 -- -- -- -- -- -- -- -- -- -- -- --
VOUT/T VOUT/VIN VOUT/VOUT VIN-VOUT
VOUT Temperature Coefficient Line Regulation Load Regulation Dropout Voltage
IDD PSRR IOUTSC VOUT/PD eN
Note 1: 2: 3: 4: 5:
Supply Cur rent Pow er S upply Rejection Ratio Output Short Circuit Current Thermal Regulation Output Noise
µA dB mA V/W nV/Hz
6: 7: 8:
VR is th e regulator outp ut voltage setting. The minimum VIN has to ju stify the condition s: VIN VR + VDROPOUT a nd VIN 2.7V for IL = 0.1mA to IOUTMA X. This accuracy rep resents the wo rst case ove r th e entire outpu t cu rrent and te mperature rang e. TC VO UT = (VOUT MA X VOUT MI N) x 10 6 VOUT x T Regulation is mea sured at a con stant junction temperatu re u sing lo w duty cycle pulse te sting. Lo ad regulatio n is tested over a loa d ra nge from 0.1 mA to the maximum spe cified output current. Ch anges in outpu t vo ltage d ue to h eating effects are covere d by the th ermal re gulation spe cification. Dro pout volta ge is de fined as the input to outpu t different ial at which the ou tput voltag e drops 2 % belo w its n ominal value me asu red at a 1.5V differential. Thermal Reg ulat ion is defined as the change in o utput voltage at a time T after a change in p ower d issipa tion is applied , e xclud ing lo ad or line regulation effects. Spe cificatio ns are for a curren t pulse e qual to ILM AX at VIN = 6 V for T = 10 msec. The maximum a llo wable power dissipation is a functio n of ambie nt temp erature, the maximu m allowa ble junctio n temp erature and the thermal resistance from ju nction-to-air (i.e., TA, TJ, JA). Exce edin g th e maximum allowab le power dissipatio n causes the device to initiate thermal shutdown. Plea se see Section 4.0 Therma l Con sideratio ns f or more details.
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DS 21375B-page 2
2002 Microchip Technology Inc.
TC1264
2.0 PIN DESCRIPTIONS
The descriptions of the pins are listed in Table 2-1.
TABLE 2-1:
Pin No. ( 3-Pin SOT-223) (3-Pin TO- 220) (3-Pin DDPAK) 1 2 3
PIN FUNCTION TABLE
Symbol
Description
VIN G ND VOU T
Unregulated supply input. Ground terminal. Regulated voltage output.
3.0
DETAILED DESCRIPTION
3.1
Output Capacitor
The TC1264 is a precision, fixed output LDO. Unlike bipolar regulators, the TC1264's supply current does not increase with load current. In addition, VOUT remains stable and within regulation over the entire 0m A to ILOADMAX load current range (an im portant consideration in RTC and CMOS RAM battery back-up applications). Figure 3-1 shows a typical application circuit.
FIGURE 3-1:
TYPICAL APPLICATION CIRCU IT
+ VIN C1 1µF VOUT + VOUT C2 1µF
+ Battery
TC1264
GND
A 1µF (min) capacitor from VOUT to ground is required. The output capacitor should have an effective series resistance greater than 0.1 and less than 5. A 1µF capacitor should be connected from VIN to GND if there is m ore 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 alum inum electrolytic capacitors freeze at approximately -30°C, solid tantalum s 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.
2002 Microchip Technology Inc.
D S21375B-page 3
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