TCA7660 MICROCHIP | Alldatasheet
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© 2001 Microchip Technology Inc. DS21466A HIGH FREQUENCY 7660 DC-TO-DC VOLTAGE CONVERTER
FEATURES
I Pin Compatible with 7660, High Frequency Performance DC-to-DC Converter I Low Cost, Two Low Value External Capacitors I Converts +5V Logic Supply to ±5V System I Available in 8-Pin SOIC and 8-Pin PDIP Packages GENERAL DESCRIPTION The TC7660H is a pin-compatible, high frequency up- grade to the Industry standard TC7660 charge pump volt- age converter. It converts a +1.5V to +10V input to a corresponding – 1.5V to – 10V output using only two low- cost capacitors, eliminating inductors and their associated cost, size and EMI. The TC7660H operates at a frequency of 120kHz (versus 10kHz for the TC7660), allowing the use of 1.0µF 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. FUNCTIONAL BLOCK DIAGRAM
ORDERING INFORMATION
Part No. Package Range TC7660HCOA 8-Pin SOIC 0 °C to +70°C TC7660HCPA 8-Pin Plastic DIP 0 °C to +70°C TC7660HEOA 8-Pin SOIC – 40 °C to +85°C TC7660HEPA 8-Pin Plastic DIP – 40 °C to +85°C TC7660EV Evaluation Kit for Charge Pump Family TC7660H GND INTERNAL VOLTAGE REGULATOR RC OSCILLATOR VOLTAGE– LEVEL TRANSLATOR ÷ 2 V + CAP + OSC LV LOGIC NETWORK VOUT CAP –4 NC CAP + G ND CAP – VOUT LOW VOLTAGE (LV) OSC NC CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC NC = NO INTERNAL CONNECTION 1 8 2 7 3 6 4 5 TC7660HCPA TC7660HEPA TC7660HCOA TC7660HEOA PIN CONFIGURATION (DIP and SOIC)
HIGH FREQUENCY 7660 DC-TO-DC VOLTAGE CONVERTER TC7660H-2 10/1/96 © 2001 Microchip Technology Inc. DS21466A ABSOLUTE MAXIMUM RATINGS* LV and OSC Inputs for V+ < 5.5V for V+ > 5.5V Power Dissipation (TA ≤ 70°C) (Note 2) Operating Temperature Range *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 perma- nent 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: Over Operating Temperature Range with V+= 5V, CI = C2 = 1µF, COSC = 0, Test Circuit (Figure 1), unless otherwise indicated. Symbol Parameter Test Conditions Min Typ Max Unit I+ Supply Current R L = ∞ — 0.46 1.0 mA H Supply Voltage Range, High Min ≤ TA ≤ Max, 3 — 10 V R L = 5kΩ , LV Open L Supply Voltage Range, Low Min ≤ TA ≤ Max, 1.5 — 3.5 V R L = 5kΩ , LV to GND R OUT Output Source Resistance I OUT = 20mA, TA = 25°C — 55 80 Ω IOUT = 20mA, 0°C ≤ TA ≤ +70°C— — 9 5 Ω (C Device) IOUT = 20mA, – 40°C ≤ TA ≤ +85°C — — 110 Ω (E Device) V+ = 2V, IOUT = 3mA, LV to GND — 150 250 Ω 0°C ≤ TA ≤ +70°C FOSC Oscillator Frequency — 120 — kHz PEFF Power Efficiency I OUT = 10mA, Min ≤ TA ≤ Max 81 85 — % VEFF Voltage Efficiency R L = ∞ 99 99.7 — % NOTES: 1. Connecting any input 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 TC7660H. 2. Derate linearly above 50°C by 5.5mW/°C.
HIGH FREQUENCY 7660 DC-TO-DC VOLTAGE CONVERTER TC7660H TC7660H-2 10/1/96© 2001 Microchip Technology Inc. DS21466A Dimensions: inches (mm) 8-Pin SOIC PACKAGE DIMENSIONS .050 (1.27) TYP. 8° MAX. .244 (6.20) .228 (5.79) .157 (3.99) .150 (3.81) .197 (5.00) .189 (4.80) .020 (0.51) .013 (0.33) .010 (0.25) .004 (0.10) .069 (1.75) .007 (0.18) .050 (1.27) .016 (0.40) 8-Pin Plastic DIP 3° MIN. PIN 1 .260 (6.60) .240 (6.10) .045 (1.14) .030 (0.76) .070 (1.78) .040 (1.02) .400 (10.16) .348 (8.84) .200 (5.08) .140 (3.56) .150 (3.81) .115 (2.92) .110 (2.79) .090 (2.29) .022 (0.56) .015 (0.38) .040 (1.02) .008 (0.20) .310 (7.87) .290 (7.37) .400 (10.16) .310 (7.87)
HIGH FREQUENCY 7660 DC-TO-DC VOLTAGE CONVERTER TC7660H-2 10/1/96 © 2001 Microchip Technology Inc. DS21466A Information contained in this publication regarding device applications and the like is intended through suggestion only and may be superseded by updates. It is your responsibility to ensure that your application meets with your specifications. No representation or warranty is given and no liability is assumed by Microchip Technology Incorporated with respect to the accuracy or use of such information, or infringement of patents or other intellectual property rights arising from such use or otherwise. Use of Microchipís products as critical components in life support systems is not authorized except with express written approval by Microchip. No licenses are conveyed, implicitly or otherwise, except as maybe explicitly expressed herein, under any intellec- reserved. All other trademarks mentioned herein are the property of their respective companies. All rights reserved. © 2001 Microchip Technology Incorporated. Printed in the USA. 1/01 Printed on recycled paper. AMERICAS Corporate Office 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7200 Fax: 480-792-7277 Technical Support: 480-792-7627 Web Address: http://www.microchip.com Rocky Mountain 2355 West Chandler Blvd. Chandler, AZ 85224-6199 Tel: 480-792-7966 Fax: 480-792-7456 Atlanta
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