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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1264 Datasheet

800mA Fixed Output CMOS LDO

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TC1264 pdf
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 Over Temperature Protection
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Device Selection Table
Part Number
TC1264-xxVDB
TC1264-xxVAB
TC1264-xxVEB
Package
3-Pin SOT-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
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 TO-220
TAB IS GND
TC1264
3-Pin DDPAK
FRONT VIEW
TAB IS GND
TC1264
12 3
12 3
3-Pin SOT-223
FRONT VIEW
3 VOUT
2 GND
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
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).
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.
Typical Application
VIN VIN
VOUT
TC1264
GND
VOUT
C1
1µF
© 2002 Microchip Technology Inc.
DS21375B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1264 Datasheet

800mA Fixed Output CMOS LDO

No Preview Available !

TC1264 pdf
TC1264
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage .........................................................6.5V
Output Voltage.................. (VSS – 0.3V) to (VIN + 0.3V)
Power Dissipation................Internally Limited (Note 8)
Maximum 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
*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.
TC1264 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VIN = VR + 1.5V, (Note 1), IL = 100µA, CL = 3.3µF, TA = 25°C, unless otherwise noted. Boldface type
specifications apply for junction temperatures of -40°C to +125°C.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
VIN
IOUTMAX
VOUT
Input Operating Voltage
Maximum Output Current
Output Voltage
VOUT/T
VOUT/VIN
VOUT/VOUT
VIN-VOUT
VOUT Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage
2.7 6.0
800
VR – 2.5%
VR – 2%
VR – 7%
VR ± 0.5%
VR ± 0.5%
40
VR + 2.5%
VR + 3%
VR + 3%
0.007
0.35
-0.01
0.002
0
— 20 30
— 50 160
— 150 480
— 260 800
— 450 1300
— 700 1000
— 890 1400
V
mA
V
V
ppm/°C
%
%/mA
mV
Note 2
VR 2.5V
VR = 1.8V
IL = 0.1mA to 800mA (Note 3)
Note 4
(VR + 1V) VIN 6V
IL = 0.1mA to IOUTMAX (Note 5)
VR 2.5V, IL = 100µA
IL = 100mA
IL = 300mA
IL = 500mA
IL = 800mA
VR = 1.8V, IL = 500mA
IL = 800mA
(Note 6)
IDD
PSRR
Supply Current
Power Supply Rejection Ratio
— 80 130 µA IL = 0
— 64 — dB F 1kHz
IOUTSC
Output Short Circuit Current
— 1200 — mA VOUT = 0V
VOUT/PD Thermal Regulation
— 0.04 — V/W Note 7
eN Output Noise
— 260 — nV/Hz IL = IOUTMAX, 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: This accuracy represents the worst case over the entire output current and temperature range.
4: TC VOUT = (VOUTMAX – VOUTMIN) x 106
VOUT x T
5: 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.
6: 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.
7: 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 = 10 msec.
8: 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 Section 4.0 Thermal Considerations for more details.
DS21375B-page 2
© 2002 Microchip Technology Inc.


Part Number TC1264
Description 800mA Fixed Output CMOS LDO
Maker Microchip Technology
Total Page 12 Pages
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