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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1262 Datasheet

500mA Fixed Output CMOS LDO

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TC1262 pdf
TC1262
500mA Fixed Output CMOS LDO
Features
• Very Low Dropout Voltage
• 500mA 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
TC1262-xxVDB
TC1262-xxVAB
TC1262-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: 2.5, 2.8, 3.0, 3.3, 5.0.
Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
3-Pin TO-220
Tab is GND
3-Pin DDPAK
Front View
Tab is GND
TC1262
12 3
TC1262
12 3
3-Pin SOT-223
Front View
3 VOUT
2 GND
TC1262 1 VIN
General Description
The TC1262 is a fixed output, high accuracy (typically
±0.5%) CMOS low dropout regulator. Designed specif-
ically for battery-operated systems, the TC1262’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).
TC1262 key features include ultra low noise operation,
very low dropout voltage (typically 350mV at full load),
and fast response to step changes in load.
The TC1262 incorporates both over temperature and
over current protection. The TC1262 is stable with an
output capacitor of only 1µF and has a maximum
output current of 500mA. It is available in 3-Pin
SOT-223, 3-Pin TO-220 and 3-Pin DDPAK packages.
Typical Application
VIN VIN
VOUT +
VOUT
TC1262
C1
1µF
GND
© 2002 Microchip Technology Inc.
DS21373B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1262 Datasheet

500mA Fixed Output CMOS LDO

No Preview Available !

TC1262 pdf
TC1262
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 6)
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.
TC1262 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VIN = VOUT + 1V, 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 Input Operating Voltage
2.7 6.0 V Note 7
IOUTMAX
Maximum Output Current
500
— mA
VOUT
Output Voltage
— VR ±0.5% —
V Note 1
VR – 2.5% VR + 2.5%
VOUT/T
VOUT Temperature Coefficient
40
— ppm/°C Note 2
VOUT/VIN Line Regulation
.003
0.35
%/V (VR + 1V) VIN 6V
VOUT/VOUT Load Regulation
0.002
0.01
%/mA IL = 0.1mA to IOUTMAX (Note 3)
VIN-VOUT
Dropout Voltage
— 20 30 mV IL = 100µA
— 60 130
IL = 100mA
— 200 390
IL = 300mA
350 650
IL = 500mA (Note 4)
IDD Supply Current
— 80 130 µA IL = 0
PSRR Power Supply Rejection Ratio — 64 — dB FRE 1kHz
IOUTSC
Output Short Circuit Current
— 1200 — mA VOUT = 0V
VOUT/PD Thermal Regulation
— 0.04 — V/W Note 5
eN Output Noise
— 260 — nV/Hz IL = IOUTMAX, FRE = 10kHz
Note
1: VR is the regulator output voltage setting.
2: TC VOUT = (VOUTMAX – VOUTMIN) x 106
VOUT x T
3: 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.
4: Dropout voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at a
1V differential.
5: 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.
6: 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.
7: The minimum VIN has to justify the conditions: VIN VR + VDROPOUT and VIN 2.7V for IL = 0.1mA to IOUTMAX.
DS21373B-page 2
© 2002 Microchip Technology Inc.


Part Number TC1262
Description 500mA Fixed Output CMOS LDO
Maker Microchip Technology
Total Page 12 Pages
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