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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1108 Datasheet

300mA CMOS LDO

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TC1108 pdf
TC1108
300mA CMOS LDO
Features
• Extremely Low Supply Current (50µA, Typ.)
• Very Low Dropout Voltage
• 300mA 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
Package
Junction
Temp. Range
TC1108-xxVDB 3-Pin SOT-223 -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
SOT-223
General Description
The TC1108 is a fixed output, high accuracy (typically
±0.5%) CMOS low dropout regulator. Total supply
current is typically 50µA at full load (20 to 60 times
lower than in bipolar regulators).
TC1108 key features include ultra low noise operation,
very low dropout voltage (typically 240mV at full load),
and fast response to step changes in load.
The TC1108 incorporates both over temperature and
over current protection. The TC1108 is stable with an
output capacitor of only 1µF and has a maximum
output current of 300mA. It is available in a SOT-223
package.
Typical Application
1
VIN VIN
VOUT 3
+
VOUT
C1
TC1108
1µF
2
GND
TC1108VDB
12
3
VIN GND VOUT
© 2002 Microchip Technology Inc.
DS21357B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1108 Datasheet

300mA CMOS LDO

No Preview Available !

TC1108 pdf
TC1108
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.
TC1108 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
300 — — mA
VOUT
Output Voltage
— VR ±0.5% —
VR – 2.5%
VR + 2.5%
V Note 1
VOUT/T
VOUT Temperature Coefficient
40
— ppm/°C Note 2
VOUT/VIN Line Regulation
0.05
0.35
% (VR + 1V) VIN 6V
VOUT/VOUT Load Regulation
— 0.5 2.0 % IL = 0.1mA to IOUTMAX (Note 3)
VIN-VOUT
Dropout Voltage
— 20 30 mV IL = 0.1mA
— 80 160
IL = 100mA
— 240 480
IL = 300mA (Note 4)
IDD Supply Current
— 50 90 µA
PSRR
Power Supply Rejection Ratio
60
— dB FRE 1kHz
IOUTSC
Output Short Circuit Current
— 550 650 mA VOUT = 0V
VOUT/PD Thermal Regulation
— 0.04 — V/W Note 5
eN Output Noise
— 260 — nV/Hz F = 10kHz, COUT = 1µF,
RLOAD = 50
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.
DS21357B-page 2
© 2002 Microchip Technology Inc.


Part Number TC1108
Description 300mA CMOS LDO
Maker Microchip
Total Page 12 Pages
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