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TC1264-1.8VDB Arkusz danych(PDF) 2 Page - Microchip Technology

Numer części TC1264-1.8VDB
Szczegółowy opis  800 mA Fixed-Output CMOS LDO with Shutdown
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TC1264-1.8VDB Arkusz danych(HTML) 2 Page - Microchip Technology

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TC1264
DS21375C-page 2
© 2006 Microchip Technology Inc.
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
† 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
VIN
2.7
6.0
V
Note 2
Maximum Output Current
IOUTMAX
800
——
mA
Output Voltage
VOUT
VR – 2.5% VR ± 0.5% VR + 2.5%
VVR ≥ 2.5V
VR – 2%
VR ± 0.5% VR + 3%
VR = 1.8V
VR – 7%
VR + 3%
IL = 0.1 mA to 800 mA
(Note 3)
VOUT Temperature Coefficient
ΔVOUT/ΔT
40
ppm/°C Note 4
Line Regulation
ΔVOUT/ΔVIN
—0.007
0.35
%(VR + 1V) ≤ VIN ≤ 6V
Load Regulation (Note 5)
ΔVOUT/VOUT
-0.01
0.002
0
%/mA
IL = 0.1 mA to IOUTMAX
Dropout Voltage (Note 6)
VIN–VOUT
—20
30
mV
VR ≥ 2.5V, IL = 100 µA
—50
160
VR ≥ 2.5V, IL = 100 mA
150
480
VR ≥ 2.5V, IL = 300 mA
260
800
VR ≥ 2.5V, IL = 500 mA
450
1300
VR ≥ 2.5V, IL = 800 mA
1000
1200
VR = 1.8V, IL = 500 mA
1200
1400
IL = 800 mA
Supply Current
IDD
—80
130
µA
SHDN = VIH, IL = 0
Power Supply Rejection Ratio
PSRR
64
db
F
≤ 1kHz
Output Short Circuit Current
IOUTSC
1200
mA
VOUT = 0V
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:
This accuracy represents the worst-case over the entire output current and temperature range.
4:
5:
Regulation is measured at a constant junction temperature using low duty cycle pulse testing. Load regulation is tested
over a load range from 0.1 mA 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 ms.
8:
The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction tem-
perature and the thermal resistance from junction-to-air (i.e., TA, TJ, θJA). Exceeding the maximum allowable power dis-
sipation causes the device to initiate thermal shutdown. Please see Section 5.0 “Thermal Considerations” for more
details..
TCVOUT
VOUTMAX VOUTMIN
() 10
6
VOUT
T
Δ
×
-------------------------------------------------------------------------
=


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