EVALUATION KIT AVAILABLE TC7662B CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER FEATURES GENERAL DESCRIPTION Wide Operating Voltage Range: 1.5V to 15V The TC7662B is a pin-compatible upgrade to the Indus- Boost Pin (Pin 1) for Higher Switching Frequency try standard TC7660 charge pump voltage converter. It High Power Efficiency is 96% converts a +1.5V to +15V input to a corresponding 1.5 to Easy to Use Requires Only 2 External Non-Critical 15V output using only two low-cost capacitors, eliminating Passive Components inductors and their associated cost, size and EMI. Improved Direct Replacement for Industry Stan- The on-board oscillator operates at a nominal fre- dard ICL7660 and Other Second Source Devices quency of 10kHz. Frequency is increased to 35kHz when + pin 1 is connected to V , allowing the use of smaller external capacitors. Operation below 10kHz (for lower supply current APPLICATIONS applications) is also possible by connecting an external capacitor from OSC to ground (with pin 1 open). Simple Conversion of +5V to 5V Supplies The TC7662B is available in both 8-pin DIP and 8-pin Voltage Multiplication V = nV OUT IN small outline (SO) packages in commercial and extended Negative Supplies for Data Acquisition Systems temperature ranges. and Instrumentation RS232 Power Supplies ORDERING INFORMATION Supply Splitter, V = V /2 OUT S Temperature Part No. Package Range PIN CONFIGURATION (DIP AND SOIC) TC7662BCOA 8-Pin SOIC 0C to +70C TC7662BCPA 8-Pin Plastic DIP 0C to +70C + + BOOST 1 8 BOOST 1 8 V V + + TC7662BEOA 8-Pin SOIC 40C to +85C CAP 2 7 OSC CAP 2 7 OSC LOW LOW TC7662BCPA TC7662BCOA TC7662BEPA 8-Pin Plastic DIP 40C to +85C GND 3 6 GND 3 6 VOLTAGE (LV) VOLTAGE (LV) TC7662BEPA TC7662BEOA CAP 4 5 V CAP 4 5 V TC7660EV Evaluation Kit for OUT OUT Charge Pump Family FUNCTIONAL BLOCK DIAGRAM + + V CAP 82 1 BOOST VOLTAGE 7 RC 4 2 OSC LEVEL CAP OSCILLATOR TRANSLATOR 6 LV 5 V OUT INTERNAL VOLTAGE REGULATOR LOGIC NETWORK TC7662B 3 GND 2001 Microchip Technology Inc. DS21469A TC7662B-8 9/11/96CHARGE PUMP DC-TO-DC VOLTAGE CONVERTER TC7662B Operating Temperature Range ABSOLUTE MAXIMUM RATINGS* C Suffix .................................................. 0C to +70C Supply Voltage ...................................................... +16.5V E Suffix ............................................. 40C to +85C LV, Boost and OSC Inputs Voltage (Note 1) Storage Temperature Range ................ 65C to +150C + V+<5.5V ..................................... 0.3V to (V + 0.3V) Lead Temperature (Soldering, 10 sec) ................. +300C + + >5.5V .................................. (V 5.5V) to (V + 0.3V) * Static-sensitive device. Unused devices must be stored in conductive Current Into LV (Note 1) material. Protect devices from static discharge and static fields. Stresses + V >3.5V ............................................................ 20 A above those listed underAbsolute Maximum Rating may cause perma- Output Short Duration nent damage to the device. These are stress ratings only and functional (V 5.5V) ....................................... Continuous operation of the device at these or any other conditions above those SUPPLY indicated in the operation sections of the specifications is not implied. Power Dissipation (T 70C) (Note 2) A Exposure to absolute maximum rating conditions for extended periods Plastic DIP ......................................................730mW may affect device reliability. SO ..................................................................470mW + ELECTRICAL CHARACTERISTICS: V = 5V, T = +25C, OSC = Free running, Test Circuit Figure 2, Unless A Otherwise Specified. Symbol Parameter Test Conditions Min Typ Max Unit + I Supply Current (Note 3) R = , +25C 80 160 A L (Boost pin OPEN OR GND) 0C T +70C 180 A A 40C T +85C 180 A A 55C T +125C 200 A A + I Supply Current 0C T +70C 300 A A (Boost pin = V+) 40C T +85C 350 A 55C T +125C 400 A + V Supply Voltage Range, High R = 10 k , LV Open, T T T 3.0 15 V L MIN A MAX H (Note 4) + V Supply Voltage Range, Low R = 10 k , LV to GND, T T T 1.5 3.5 V L MIN A MAX L R Output Source Resistance I = 20mA, 0C T +70C 65 100 OUT OUT A I = 20mA, 40C T +85C 120 OUT A I = 20mA, 55C T +125C 150 OUT A + I = 3mA, V = 2V, LV to GND , 250 OUT 0C T +70C A + I = 3mA, V = 2V, LV to GND , 300 OUT 40C T +85C A + I = 3mA, V = 2V, LV to GND , 400 OUT 55C T +125C A f Oscillator Frequency C = 0,Pin 1 Open or GND 5 10 kHz OSC OSC + Pin 1 = V 35 P Power Efficiency R = 5k 96 96 % Eff L T T T 95 97 MIN A MAX V Eff Voltage Conversion Efficiency R = 99 99.9 % OUT L + Z Oscillator Impedance V = 2V 1 M OSC + V = 5V 100 k NOTES: 1. Connecting any terminal to voltages greater than V+ 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 TC7662B. 2. Derate linearly above 50C by 5.5 mW/C. 3. In the test circuit, there is no external capacitor applied to pin 7. However, when the device is plugged into a test socket, there is usually a very small but finite stray capacitance present, of the order of 5pF. 4. The TC7662B can operate without an external diode over the full temperature and voltage range. This device will function in existing designs which incorporate an external diode with no degradation in overall circuit performance. TC7662B-8 9/11/96 2 2001 Microchip Technology Inc. DS21469A