tc7660h Microchip Technology Inc., tc7660h Datasheet
tc7660h
Available stocks
Related parts for tc7660h
tc7660h Summary of contents
Page 1
... TC7660), allowing the use of 1.0 F external capacitors. Oscillator frequency can be reduced (for lower supply current applications) by connecting an external capacitor from OSC to ground. The TC7660H is available in 8-pin DIP and small outline (SOIC) packages in commercial and extended temperature ranges. + ...
Page 2
... Voltage Efficiency EFF NOTES: 1. Connecting any input terminal to voltages greater than V+ or less than GND may cause destructive latch-up recommended that no inputs from sources operating from external supplies be applied prior to "power up" of the TC7660H. 2. Derate linearly above 5.5mW/ C. TC7660H-2 10/1/96 ...
Page 3
... Figure 1. TC7660H Test Circuit Detailed Description The TC7660H contains all the necessary circuitry to implement a voltage inverter, with the exception of two external capacitors, which may be inexpensive 1.0 F non-polarized capacitors. Operation is best understood by considering Figure 2, which shows an idealized voltage inverter. Capacitor C is charged to a voltage, V ...
Page 4
... NOTES OUT = – for 1.5V Cascading Devices The TC7660H may be cascaded as shown in (Figure 4) to produce larger negative multiplication of the initial supply voltage. However, due to the finite efficiency of each device, the practical limit is probably 10 devices for light loads. The output voltage is defined by – ...
Page 5
... Figure 6. External Clocking Positive Voltage Multiplication The TC7660H may be employed to achieve positive voltage multiplication using the circuit shown in Figure 7. In this application, the pump inverter switches of the TC7660H are used to charge voltage level the supply voltage and V is the forward voltage drop of ...
Page 6
... Figure 9 shows a TC7660H transforming –5V to +5V (or +5V to +10V, etc.). The only problem here is that the internal clock and switch- drive section will not operate until some positive voltage has been generated ...
Page 7
... Microchip Technology Inc. DS21466A PIN 1 .260 (6.60) .240 (6.10) .070 (1.78) .040 (1.02) .400 (10.16) .348 (8.84) .040 (1.02) .020 (0.51) .022 (0.56) .015 (0.38) .157 (3.99) .244 (6.20) .150 (3.81) .228 (5.79) .069 (1.75) .053 (1.35) 8 MAX. .010 (0.25) .050 (1.27) .004 (0.10) .016 (0.40) 7 TC7660H .310 (7.87) .290 (7.37) .015 (0.38) 3 MIN. .008 (0.20) .400 (10.16) .310 (7.87) .010 (0.25) .007 (0.18) Dimensions: inches (mm) TC7660H-2 10/1/96 ...
Page 8
... Microchip. No licenses are conveyed, implicitly or otherwise, except as maybe explicitly expressed herein, under any intellec- tual property rights. The Microchip logo and name are registered trademarks of Microchip Technology Inc. in the U.S.A. and other countries. All rights reserved. All other trademarks mentioned herein are the property of their respective companies. TC7660H-2 10/1/96 HIGH FREQUENCY 7660 DC-TO-DC S ...