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TC1240A Dataheets PDF



Part Number TC1240A
Manufacturers Microchip
Logo Microchip
Description Positive Doubling Charge Pumps
Datasheet TC1240A DatasheetTC1240A Datasheet (PDF)

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) Shutdow.

  TC1240A   TC1240A



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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 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 current is 180 µA for the TC1240 and 550 µA for the TC1240A. Both devices are available in a 6-Pin SOT23A surface mount package. Applications • • • • • Cellular Phones Pagers PDAs, Portable Data Loggers Battery Powered Devices Handheld Instruments Typical Application Circuit Positive Voltage Doubler + C+ VIN INPUT Package Type 6-Pin SOT-23A C+ 6 VOUT SHDN 5 4 C1 TC1240 TC1240A CSHDN OFF ON VOUT GND + C2 2 x INPUT TC1240ECH TC1240AECH 1 VIN 2 GND 3 C- NOTE: 6-Pin SOT-23A is equivalent to the EIAJ (SC-74A)  2001-2012 Microchip Technology Inc. DS21516D-page 1 Free Datasheet http://www.datasheet4u.com/ TC1240/TC1240A 1.0 ELECTRICAL CHARACTERISTICS † 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. 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............................................50 mA Short-Circuit Duration: VOUT to GND .............Indefinite Thermal Resistance .......................................210°C/W Power Dissipation (TA = +25°C)........................600 mW Operating Temperature Range.............-40°C to +85°C Storage Temperature (Unbiased) .......-65.


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