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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1269 Datasheet

300mA CMOS LDO with Shutdown and VREF Bypass

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TC1269 pdf
TC1269
300mA CMOS LDO with Shutdown and VREF Bypass
Features
• Very Low Ground Current for Longer Battery Life
• Very Low Dropout Voltage
• 300mA Output Circuit
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Power Saving Shutdown Mode
• Bypass Input for Ultra Quiet Operation
• Over Current and Over Temperature Protection
• Space-Saving MSOP Package
Applications
• Battery Operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulator for SMPS
• Pagers
• Digital Cameras
Device Selection Table
Output*
Part Number Voltage Package
(V)
Junction
Temp. Range
TC1269-2.5VUA 2.5 8-Pin MSOP -40°C to +125°C
TC1269-2.8VUA 2.8 8-Pin MSOP -40°C to +125°C
TC1269-3.0VUA 3.0 8-Pin MSOP -40°C to +125°C
TC1269-3.3VUA 3.3 8-Pin MSOP -40°C to +125°C
TC1269-5.0VUA 5.0 8-Pin MSOP -40°C to +125°C
*Other output voltages are available. Please contact Microchip
Technology Inc. for details.
Package Type
8-Pin MSOP
VOUT 1
8 VIN
NC 2 TC1269 7 SHDN
NC 3
6 NC
GND 4
5 Bypass
General Description
The TC1269 is a fixed output, high accuracy (typically
±0.5%) CMOS upgrade for older (bipolar) low dropout
regulators. Total supply current is typically 50µA at full
load (20 to 60 times lower than in bipolar regulators).
TC1269 key features include ultra low noise operation
(plus optional Bypass input); very low dropout voltage
(typically 240mV at full load), and fast response to step
changes in load. Supply current is reduced to 0.05µA
(typical) and VOUT falls to zero when the shutdown
input is low.
The TC1269 incorporates both over temperature and
over current protection. The TC1269 is stable with an
output capacitor of only 1µF and has a maximum
output current of 300mA.
Typical Application
VOUT
1
+ C1 VOUT
8
VIN
VIN
1µF
2 NC
7
SHDN
Shutdown Control
TC1269
(from Power
Control Logic)
3 NC
6
NC
4 GND Bypass
CBYPASS
470pF
(Optional)
© 2002 Microchip Technology Inc.
DS21380B-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1269 Datasheet

300mA CMOS LDO with Shutdown and VREF Bypass

No Preview Available !

TC1269 pdf
TC1269
1.0 ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage .........................................................6.5V
Output Voltage.................... (VSS – 0.3) to (VIN + 0.3V)
Maximum Voltage on Any Pin ........ VIN +0.3V to -0.3V
Power Dissipation................Internally Limited (Note 6)
Operating Temperature ............... -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.
TC1269 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: VIN = VOUT + 1V, IL = 0.1µA, CL = 3.3µF, SHDN > VIH, 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
VOUT/T
VOUT/VIN
VOUT/VOUT
VIN-VOUT
ISS1
ISS2
PSRR
IOUTSC
VOUT/PD
eN
Input Operating Voltage
Maximum Output Current
Output Voltage
VOUT Temperature Coefficient
Line Regulation
Load Regulation
Dropout Voltage
Supply Current
Shutdown Supply Current
Power Supply Rejection Ratio
Output Short Circuit Current
Thermal Regulation
Output Noise
300
VR – 2.5%
VR ±0.5%
40
0.05
0.5
20
80
240
50
0.05
50
550
0.04
260
6.0
VR + 2.5%
0.35
2.0
30
160
480
90
0.5
650
V
mA
V Note 1
ppm/°C Note 2
% (VR + 1V) VIN 6V
% IL = 0.1mA to IOUTMAX
mV IL = 0.1mA
IL = 100mA
IL = 300mA (Note 4)
µA SHDN = VIH
µA SHDN = 0V
dB
mA
V/W
FRE 120Hz
VOUT = 0V
Note 5
nV/Hz F = 1kHz, COUT = 1µF, RLOAD = 50
SHDN Input
VIH
VIL
Note 1:
2:
3:
4:
5:
6:
SHDN Input High Threshold
45
— %VIN
SHDN Input Low Threshold
15 %VIN
VR is the regulator output voltage setting.
TC VOUT = (VOUTMAX – VOUTMIN) x 106
VOUT x T
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 specifica-
tion.
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 differen-
tial.
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.
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.
DS21380B-page 2
© 2002 Microchip Technology Inc.


Part Number TC1269
Description 300mA CMOS LDO with Shutdown and VREF Bypass
Maker Microchip Technology
Total Page 12 Pages
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