參數(shù)資料
型號(hào)： TC1240
廠商： Microchip Technology Inc.
英文描述： Positive Doubling Charge Pumps with Shutdown in a SOT-23 Package(159kHz開關(guān)頻率,帶關(guān)斷DC-DC)
中文描述： 積極加倍電荷泵與關(guān)機(jī)采用SOT - 23封裝（159kHz開關(guān)頻率，帶關(guān)斷的DC - DC）
文件頁(yè)數(shù)： 3/16頁(yè)
文件大?。?/td> 355K
代理商： TC1240
2003 Microchip Technology Inc.
DS21516C-page 3
TC1240/TC1240A
TC1240A ELECTRICAL SPECIFICATIONS
Electrical Specifications:
Unless otherwise noted, typical values apply at T
A
= +25°C. Minimum and maximum
values apply for T
A
= -40° to +85°C, and V
IN
= +5.0V, C
1
= C
2
= 3.3 μF, SHDN = GND.
Parameters
Sym
Min
Typ
Max
Units
Conditions
Supply Current
Shutdown Supply Current
Minimum Supply Voltage
Maximum Supply Voltage
Output Current
Sum of the R
DS(ON)
of the
internal MOSFET Switches
Oscillator Frequency
Switching Frequency
(Note 1)
Shutdown Input Logic High
Shutdown Input Logic Low
Power Efficiency
Voltage Conversion Efficiency
Output Resistance
(Note 2)
I
DD
I
SHDN
V
MIN
V
MAX
I
LOAD
R
SW
—
—
2.5
—
20
—
550
0.01
—
—
—
4
900
1.0
—
5.5
—
8
μA
μA
V
V
mA
R
LOAD
=
∞
SHDN = V
IN
I
LOAD
= 20 mA
F
OSC
F
SW
V
IH
V
IL
P
EFF
V
EFF
R
OUT
—
40
1.4
—
86
99
—
—
160
80
—
—
94
99.96
12
—
—
125
—
0.4
—
—
—
25
kHz
kHz
V
V
%
%
T
A
= -40°C to +85°C
T
A
= -40°C to +85°C
V
IN
= V
MIN
to V
MAX
V
IN
= V
MIN
to V
MAX
I
LOAD
= 5 mA
R
LOAD
=
∞
I
LOAD
= 20 μA
T
A
= -40°C to +85°C
Note 1:
Switching frequency is one-half internal oscillator frequency.
Capacitor contribution is approximately 26% of the output impedance [ESR = 1 / switching frequency x
capacitance].
2:
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