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PDF TC1240A Data sheet ( Hoja de datos )
| Número de pieza | TC1240A | |
| Descripción | Positive Doubling Charge Pumps | |
| Fabricantes | Microchip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de TC1240A (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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TC1240/TC1240A
Positive Doubling Charge Pumps with Shutdown
in a SOT-23 Package
Features
• Charge Pumps in 6-Pin SOT-23A Package
• >99% Typical Voltage Conversion Efficiency
• Voltage Doubling
• Input Voltage Range, TC1240: +2.5V to +4.0V,
TC1240A: +2.5V to +5.5V
• Low Output Resistance, TC1240: 17 (Typical)
TC1240A: 12 (Typical)
• Only Two External Capacitors Required
• Low Supply Current, TC1240: 180 µA (Typical)
TC1240A: 550 µA (Typical)
• Power-Saving Shutdown Mode (1 µA Maximum)
• Shutdown Input Fully Compatible with 1.8V Logic
Systems
Applications
• Cellular Phones
• Pagers
• PDAs, Portable Data Loggers
• Battery Powered Devices
• Handheld Instruments
Package Type
6-Pin SOT-23A
C+ VOUT SHDN
6 54
TC1240ECH
TC1240AECH
123
VIN GND C-
NOTE: 6-Pin SOT-23A is equivalent to the
EIAJ (SC-74A)
General Description
The TC1240/TC1240A is a doubling CMOS charge
pump voltage converter in a small 6-Pin SOT-23A
package. The TC1240 doubles an input voltage that
can range from +2.5V to +4.0V, while the TC1240A
doubles an input voltage that can range from +2.5V to
+5.5V. Conversion efficiency is typically >99%. Internal
oscillator frequency is 160 kHz for both devices. The
TC1240 and TC1240A have an active-high shutdown
that limits the current consumption of the devices to
less than 1 µA.
External component requirement is only two capacitors
for standard voltage doubler applications. All other
circuitry (including control, oscillator and power
MOSFETs) are integrated on-chip. Typical supply cur-
rent is 180 µA for the TC1240 and 550 µA for the
TC1240A. Both devices are available in a 6-Pin SOT-
23A surface mount package.
Typical Application Circuit
Positive Voltage Doubler
+
C1
C+ VIN
TC1240
TC1240A
INPUT
C-
SHDN
OFF
ON
GND
VOUT
+ 2 x INPUT
C2
2001-2012 Microchip Technology Inc.
DS21516D-page 1
Free Datasheet http://www.datasheet4u.com/
1 page  
TC1240/TC1240A
Note: Unless otherwise indicated, typical values apply at TA = +25°C.
100
VIN = 4.0V
80
VIN = 2.8V
60
40
20
0
-50 -25
FIGURE 2-7:
Temperature.
0 25 50 75
TEMPERATURE (°C)
100 125
Switching Frequency vs.
2001-2012 Microchip Technology Inc.
DS21516D-page 5
5 Page 
6.0 PACKAGING INFORMATION
6.1 Package Marking Information
6-Pin SOT-23A
6 54
1 2 34
1 23
1 & 2 = part number code + temperature range
(two-digit code)
Device
TC1240
TC1240A
ex: 1240AECH = E N
Code
DN
EN
3 represents year and 2-month code
4 represents production lot ID code
TC1240/TC1240A
2001-2012 Microchip Technology Inc.
DS21516D-page 11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet TC1240A.PDF ] | |
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