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参数资料
| 型号： | TC1240ECH |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHED CAPACITOR CONVERTER, 125 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | SOT-23A, 6 PIN |
| 文件页数： | 9/16页 |
| 文件大小： | 472K |
| 代理商： | TC1240ECH |
TC1240/TC1240A
DS21516B-page 2
2002 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.............................................50mA
Short-Circuit Duration: VOUT to GND .............Indefinite
Thermal Resistance .......................................210°C/W
Power Dissipation (TA =+25°C).........................600mW
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 Characteristics: Typical values apply at TA = +25°C. Minimum and maximum values apply for TA = -40° to +85°C, and
VIN =+2.8V, C1=C2 =3.3F, SHDN = GND, unless otherwise specified.
Symbol
Parameter
Min
Typ
Max
Units
Test Conditions
IDD
Supply Current
—
180
300
AR
LOAD = ∞
ISHDN
Shutdown Supply Current
—
0.1
1.0
A
SHDN = VIN
VMIN
Minimum Supply Voltage
2.5
—
V
RLOAD =1.0K
VMAX
Maximum Supply Voltage
—
5.5
V
RLOAD =1.0K
FOSC
Oscillator Frequency
—
160
—
kHz
TA = -40°C to +85°C
FSW
Switching Frequency (Note 1)
40
80
125
kHz
TA =-40°C to +85°C
VIH
Shutdown Input Logic High
1.4
—
V
VIN =VMIN to VMAX
VIL
Shutdown Input Logic Low
—
0.4
V
VIN =VMIN to VMAX
PEFF
Power Efficiency
86
93
—
%
RLOAD =1.0K
VEFF
Voltage Conversion Efficiency
97.5
99.96
—
%
RLOAD = ∞
ROUT
Output Resistance (Note 2)
—
17
—
30
RLOAD =1.0K
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 / pump frequency x capacitance].
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