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  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1265 Datasheet

800 mA Fixed-Output CMOS LDO with Shutdown

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TC1265 pdf
TC1265
800 mA Fixed-Output CMOS LDO with Shutdown
Features
• Very Low Dropout Voltage
• 800 mA Output Current
• High Output Voltage Accuracy
• Standard or Custom Output Voltages
• Overcurrent and Overtemperature Protection
• SHDN Input for Active Power Management
• ERROR Output Can Be Used as a Low Battery
Detector (SOIC only)
Applications
• Battery-operated Systems
• Portable Computers
• Medical Instruments
• Instrumentation
• Cellular/GSM/PHS Phones
• Linear Post-Regulators for SMPS
• Pagers
Typical Application
VIN
VIN
VOUT
+ C1 VOUT
TC1265
1 µF
GND
SHDN
SHDN
Description
The TC1265 is a fixed-output, high-accuracy (typically
±0.5%) CMOS low dropout regulator. Designed
specifically for battery-operated systems, the TC1265’s
CMOS construction eliminates wasted ground current,
significantly extending battery life. Total supply current
is typically 80 µA at full load (20 to 60 times lower than
in bipolar regulators).
Key features of the TC1265 include ultra low noise
operation, very low dropout voltage (typically 450 mV
at full load) and fast response to step changes in load.
The TC1265 incorporates both overtemperature and
overcurrent protection. The TC1265 is stable with an
output capacitor of only 1 µF and has a maximum
output current of 800 mA. It is available in 8-Pin SOIC,
5-Pin TO-220 and 5-Pin DDPAK packages.
Package Type
5-Pin DDPAK
5-Pin TO-220
Front View
Tab Is GND
Tab Is GND
TC1265
TC1265
12 3 45
12345
VOUT
GND
NC
BYPASS
8-Pin SOIC
18
27
TC1265
36
45
VIN
NC
SHDN
ERROR
2004 Microchip Technology Inc.
DS21376C-page 1


  Microchip Technology Semiconductor Electronic Components Datasheet  

TC1265 Datasheet

800 mA Fixed-Output CMOS LDO with Shutdown

No Preview Available !

TC1265 pdf
TC1265
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 7)
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
† Notice: Stresses above those listed under "Maximum
Ratings" may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operation listings of this specification is not implied. Exposure
to maximum rating conditions for extended periods may affect
device reliability.
DC CHARACTERISTICS
Electrical Specifications: Unless otherwise indicated, VIN = VR + 1.5V, (Note 1), IL = 100 µA, CL = 3.3 µF,
SHDN > VIH, TA = +25°C. Boldface type specifications apply for junction temperatures of -40°C to +125°C.
Parameters
Sym
Min Typ Max Units
Conditions
Input Operating Voltage
Maximum Output Current
Output Voltage
VOUT Temperature Coefficient
Line Regulation
Load Regulation (Note 4)
Dropout Voltage (Note 5)
Supply Current
Shutdown Supply Current
Power Supply Rejection Ratio
VIN
IOUTMAX
VOUT
VOUT/T
VOUT/VIN
VOUT/VOUT
VIN–VOUT
IDD
ISHDN
PSRR
2.7 6.0 V Note 2
800
— mA
VR – 2.5%
VR – 2%
VR ± 0.5%
VR ± 0.5%
40
VR + 2.5%
VR + 3%
V
ppm/°C
VR 2.5V
VR = 1.8V
Note 3
-0.01
0.007
0.002
20
50
150
260
450
700
890
80
0.05
0.35
+0.01
30
160
480
800
1300
1000
1400
130
1
%
%/mA
mV
µA
µA
(VR + 1V) VIN 6V
IL = 0.1 mA to IOUTMAX
VR 2.5V, IL = 100 µA
IL = 100 mA
IL = 300 mA
IL = 500 mA
IL = 800 mA
VR = 1.8V, IL = 500 mA
IL = 800 mA
SHDN = VIH, IL = 0
SHDN = 0V
— 64 — db F 1 kHz
Output Short Circuit Current
IOUTSC
1200
1400
mA VOUT = 0V
Thermal Regulation
VOUT/PD
0.04
— V/W Note 6
Output Noise
eN — 260 — nV/Hz IL = IOUTMAX, F = 10 kHZ
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 = 0.1 mA to IOUTMAX.
3:
TCVOUT
=
(---V----O----U---T---M-----A---X----–-----V----O---U----T---M----I--N----)---–-----1---0---6-
VOUT × ∆T
4: Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested
over a load range from 0.1 mA to the maximum specified output current. Changes in output voltage due to heating effects
are covered by the thermal regulation specification.
5: 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.
6: 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 ms.
7: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temper-
ature and the thermal resistance from junction-to-air (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dissipa-
tion causes the device to initiate thermal shutdown. Please see Section 5.0 “Thermal Considerations” for more details.
8: Hysteresis voltage is referenced to VR.
DS21376C-page 2
2004 Microchip Technology Inc.


Part Number TC1265
Description 800 mA Fixed-Output CMOS LDO with Shutdown
Maker Microchip Technology
Total Page 16 Pages
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