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TC1221 Scheda tecnica(PDF) 2 Page - Microchip Technology

Il numero della parte TC1221
Spiegazioni elettronici  High-Frequency Switched Capacitor Voltage Converters with Shutdown in SOT Packages
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Produttore elettronici  MICROCHIP [Microchip Technology]
Homepage  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC1221 Scheda tecnica(HTML) 2 Page - Microchip Technology

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TC1221/TC1222
DS20001367C-page 2
 2002-2014 Microchip Technology Inc.
1.0
ELECTRICAL
CHARACTERISTICS
Absolute Maximum Ratings*
Input Voltage (VIN to GND)....................... +6.0V, -0.3V
Output Voltage (OUT to GND).................. -6.0V, +0.3V
Current at OUT Pin..............................................50mA
Short-Circuit Duration – OUT to GND ............Indefinite
Power Dissipation (TA  70°C)
6-Pin SOT-23A .........................................240mW
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.
TC1221/TC1222 ELECTRICAL SPECIFICATIONS
Electrical Characteristics: TA = -40°C to +85°C, VIN = +5V, C1 = C2 = 1F, (TC1221), C1 = C2 = 0.22F (TC1222), Typical values
are at TA = +25°C.
Symbol
Parameter
Min.
Typ.
Max.
Units
Device
Test Conditions
IDD
Supply Current
290
1800
600
2800
A
TC1221
TC1222
ISHDN
Shutdown Supply Current
0.01
1.0
A
SHDN = GND, VIN = 5V (Note 2)
VMIN
Minimum Supply Voltage
1.8
V
RLOAD = 1k
VMAX
Maximum Supply Voltage
5.5
V
RLOAD = 1k
FOSC
Oscillator Frequency
81
550
125
750
169
950
kHz
TC1221
TC1222
VIH
SHDN Input Logic High
1.4
V
VIN = VMIN to VMAX
VIL
SHDN Input Logic Low
0.4
V
VIN = VMIN to VMAX
PEFF
Power Efficiency
90
70
%
TC1221
TC1222
RLOAD = 1k
VEFF
Voltage Conversion Efficiency
94
96
%
RLOAD = 
ROUT
Output Resistance
25
65
ILOAD = 0.5mA to 25mA (Note 1)
TWK
Wake-up Time From Shutdown
Mode
80
25
s
TC1221
TC1222
RLOAD = 1k
Note
1:
Capacitor contribution is approximately 20% of the output impedance [ESR = 1/ pump frequency x capacitance].
2:
VIN is guaranteed to be disconnected from OUT when the converter is in shutdown..


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