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TC1240ECHTR 数据表(PDF) 3 Page - Microchip Technology

部件名 TC1240ECHTR
功能描述  Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package
Download  16 Pages
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制造商  MICROCHIP [Microchip Technology]
网页  http://www.microchip.com
标志 MICROCHIP - Microchip Technology

TC1240ECHTR 数据表(HTML) 3 Page - Microchip Technology

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 2003 Microchip Technology Inc.
DS21516C-page 3
TC1240/TC1240A
TC1240A ELECTRICAL SPECIFICATIONS
Electrical Specifications: Unless otherwise noted, typical values apply at TA = +25°C. Minimum and maximum
values apply for TA = -40° to +85°C, and VIN = +5.0V, C1 = C2 = 3.3 µF, SHDN = GND.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Supply Current
IDD
550
900
µA
RLOAD = ∞
Shutdown Supply Current
ISHDN
0.01
1.0
µA
SHDN = VIN
Minimum Supply Voltage
VMIN
2.5
V
Maximum Supply Voltage
VMAX
——
5.5
V
Output Current
ILOAD
20
mA
Sum of the RDS(ON) of the
internal MOSFET Switches
RSW
—4
8
ILOAD = 20 mA
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
94
%
ILOAD = 5 mA
Voltage Conversion Efficiency
VEFF
99
99.96
%
RLOAD = ∞
Output Resistance (Note 2)
ROUT
12
25
ILOAD = 20 µA
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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