Details, datasheet, quote on part number: TC660COA
PartTC660COA
CategoryPower Management
Description100ma Charge Pump Dc-to-dc Voltage Converter
CompanyTelCom Semiconductor
DatasheetDownload TC660COA datasheet
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Features, Applications

FEATURES

Pin Compatible with TC7660 High Output Current..................................... 100mA Converts 5.5V) Power Efficiency @100mA......................... 88% typ Low Power @ 5 VIN Low Cost and Easy to Use Only Two External Capacitors Required Selectable Oscillator Frequency....... 10kHz/90kHz ESD Protection................................................... 4kV

The TC660 DC-to-DC voltage converter generates a negative voltage supply, that can support a 100mA maximum load, from a positive voltage input to 5.5V. Only two external capacitors are required. Power supply voltage is stored on an undedicated capacitor then inverted and transferred to an output reservoir capacitor. The on-board oscillator normally runs at a frequency of 10kHz with at 5V. This frequency can be lowered by the addition of an external capacitor from OSC (pin 7) to ground, or raised 90kHz by connecting the frequency control pin (FC) to V+, in order to optimize capacitor size, quiescent current, and output voltage ripple frequency. Operation using input voltage between 1.5V and 3.0V is accommodated by grounding the LV input (pin 6). Operation at higher input voltages 5.5V) is accomplished by leaving LV open. The TC660 open circuit output voltage is within 0.1% of the input voltage with the output open-circuited. Power conversion efficiency is 98% when output load is between 2mA and 5mA.

APPLICATIONS
Laptop Computers P Based Controllers Process Instrumentation Automotive Instruments
6 5 INTERNAL VOLTAGE REGULATOR LOGIC NETWORK VOUT

Supply Voltage........................................................... +6V LV, FC, OSC Input Voltage (Note 1)....................... VOUT 0.3V to (V+ +0.3V) Current Into LV (Note 20 A for V+ >3.5V Output Short Duration (VSUPPLY 5.5V) (Note 3).. 10 Sec Power Dissipation (Note 2) (TA 70C) SOIC............................................................... 470mW Plastic DIP......................................................730mW Operating Temperature Range C Suffix.................................................. +70C E Suffix............................................. to +85C Storage Temperature Range................ to +150C Lead Temperature (Soldering, 10 sec)................. +300C

*Static-sensitive device. Unused devices must be stored in conductive material. Protect devices from static discharge and static fields. 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.

ELECTRICAL CHARACTERISTICS: Specifications Measured Over Operating Temperature Range With,

= 5V, COSC = Open, FC = Open, Test Circuit (Figure 1), unless otherwise indicated. Test Conditions Min

Output Source Resistance Output Current Oscillator Frequency Input Current Power Efficiency (Note 4)

= FC pin = OPEN or GND FC pin LV = HIGH, LV = GND, LV = OUT, 1 k (Figure 9) IOUT = 100mA VOUT 4V Pin 7 open; Pin 1 open or GND Pin = V+ Pin 1 open Pin 1 k connected between V+ & VOUT = 500 connected between VOUT & GND 100mA to GND RL =

NOTES: 1. Connecting any input terminal to voltages greater than or less than GND may cause destructive latch-up. It is recommended that no inputs from sources operating from external supplies be applied prior to "power up" of the TC660. 2. Derate linearly above by 5.5 mW/C. 3. To prevent damaging the device, do not short VOUT to V+. 4. To maximize output voltage and efficiency performance, use low ESR capacitors for C1 and C2.

All curves are generated using the test circuit of Figure 1 with LV = GND, FC = open, and = +25C, unless otherwise noted.


OUTPUT VOLTAGE DROP FROM SUPPLY VOLTAGE (V)


 

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