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TC1240ECHTR Folha de dados(PDF) 2 Page - Microchip Technology

Nome de Peças TC1240ECHTR
Descrição Electrónicos  Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package
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Fabricante Electrônico  MICROCHIP [Microchip Technology]
Página de início  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1240ECHTR Folha de dados(HTML) 2 Page - Microchip Technology

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TC1240/TC1240A
DS21516C-page 2
 2003 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings †
Input Voltage (VIN to GND)
TC1240 ............................................. +4.5V, -0.3V
TC1240A ........................................... +5.8V, -0.3V
Output Voltage (VOUT to GND)
TC1240 ....................................... +9.0V, VIN -0.3V
TC1240A ................................... +11.6V, VIN -0.3V
Current at VOUT Pin............................................50 mA
Short-Circuit Duration: VOUT to GND .............Indefinite
Thermal Resistance .......................................210°C/W
Power Dissipation (TA = +25°C)........................600 mW
Operating Temperature Range.............-40°C to +85°C
Storage Temperature (Unbiased) .......-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.
TC1240 ELECTRICAL SPECIFICATIONS
Electrical Specifications: Unless otherwise noted, typical values apply at TA = +25°C. Minimum and maximum val-
ues apply for TA = -40° to +85°C, and VIN = +2.8V, C1 = C2 = 3.3 µF, SHDN = GND.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Supply Current
IDD
180
300
µA
RLOAD = ∞
Shutdown Supply Current
ISHDN
0.1
1.0
µA
SHDN = VIN
Minimum Supply Voltage
VMIN
2.5
V
RLOAD = 1.0 kΩ
Maximum Supply Voltage
VMAX
——
4.0
V
RLOAD = 1.0 kΩ
Oscillator Frequency
FOSC
160
kHz
TA = -40°C to +85°C
Switching Frequency (Note 1)
FSW
40
80
125
kHz
TA = -40°C to +85°C
Shutdown Input Logic High
VIH
1.4
V
VIN = VMIN to VMAX
Shutdown Input Logic Low
VIL
——
0.4
V
VIN = VMIN to VMAX
Power Efficiency
PEFF
86
93
%
RLOAD = 1.0 kΩ
Voltage Conversion Efficiency
VEFF
97.5
99.96
%
RLOAD = ∞
Output Resistance (Note 2)
ROUT
17
30
RLOAD = 1.0 kΩ
TA = -40°C to +85°C
Note 1:
Switching frequency is one-half internal oscillator frequency.
2:
Capacitor contribution is approximately 26% of the output impedance [ESR = 1 / switching frequency x
capacitance].


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