TC7660EV

TC1044S MICROCHIP | Alldatasheet

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Technical content

© 2001 Microchip Technology Inc. DS21348A Charge Pump DC-TO-DC Voltage Converter

FEATURES

I Converts +5V Logic Supply to ±5V System I Low Cost and Easy to Use — Only Two External Capacitors Required I RS-232 Negative Power Supply I Available in 8-Pin Small Outline (SOIC) and 8-Pin Plastic DIP Packages I No External Diode Required for High Voltage Operation I Frequency Boost Raises FOSC to 45kHz GENERAL DESCRIPTION The TC1044S is a pin-compatible upgrade to the Indus- try standard TC7660 charge pump voltage converter. It converts a +1.5V to +12V input to a corresponding –1.5V to –12V output using only two low cost capacitors, eliminat- ing inductors and their associated cost, size and EMI. Added features include an extended supply range to 12V, and a frequency boost pin for higher operating frequency, allowing the use of smaller external capacitors. The on-board oscillator operates at a nominal frequency of 10kHz. Frequency is increased to 45kHz when pin 1 is connected to V +. Operation below 10kHz (for lower supply current applications) is possible by connecting an external capacitor from OSC to ground (with pin 1 open). The TC1044S is available in both 8-pin DIP and 8-pin small outline (SOIC) packages in commercial and extended temperature ranges. FUNCTIONAL BLOCK DIAGRAM TC1044S GND INTERNAL VOLTAGE REGULATOR RC OSCILLATOR VOLTAGE – LEVEL TRANSLATOR V + CAP + OSC LV LOGIC NETWORK VOUT CAP –4 1BOOST

ORDERING INFORMATION

Part No. Package Temp. Range TC1044SCOA 8-Pin SOIC 0 °C to +70°C TC1044SCPA 8-Pin Plastic DIP 0 °C to +70°C TC1044SEOA 8-Pin SOIC – 40 °C to +85°C TC1044SEPA 8-Pin Plastic DIP – 40 °C to +85°C TC1044SIJA 8-Pin CerDIP – 25 °C to +85°C TC1044SMJA 8-Pin CerDIP – 55 °C to +125°C TC7660EV Charge Pump Family Evaluation Kit PIN CONFIGURATION (DIP AND SOIC) TC1044SCPA TC1044SEPA TC1044SIJA TC1044SMJA BOOST CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC +V 1 TC1044SCOA TC1044SEOA BOOST CAP + GND CAP – VOUT LOW VOLTAGE (LV) OSC

Charge Pump DC-TO-DC Voltage Converter 2 © 2001 Microchip Technology Inc. DS21348A Package Power Dissipation (TA ≤ 70°C) (Note 2) Operating Temperature Range ELECTRICAL CHARACTERISTICS: TA = +25°C, V+ = 5V, COSC = 0, Test Circuit (Figure 1), unless otherwise indicated. Symbol Parameter Test Conditions Min Typ Max Unit I+ Supply Current R L = ∞ — 80 160 µA I+ Supply Current 0 °C < TA < +70°C — — 300 µA (Boost Pin = V+)– 4 0 °C < TA < +85°C — — 350 V+H2 Supply Voltage Range, High Min ≤ TA ≤ Max, 3 — 12 V R L = 10 kΩ , LV Open V+L2 Supply Voltage Range, Low Min ≤ TA ≤ Max, 1.5 — 3.5 V R L = 10 kΩ , LV to GND R OUT Output Source Resistance I OUT = 20mA — 60 100 Ω IOUT = 20mA, 0°C ≤ TA ≤ +70°C — 70 120 IOUT = 20mA, –40°C ≤ TA ≤ +85°C — 70 120 IOUT = 20mA, –55°C ≤ TA ≤ +125°C — 105 150 V+ = 2V, IOUT = 3 mA, LV to GND FOSC Oscillator Frequency Pin 7 open; Pin 1 open or GND — 10 — kHz Boost Pin = V+ —4 5— PEFF Power Efficiency R L = 5 kΩ ; Boost Pin Open 96 98 — % TMIN < TA < TMAX ; Boost Pin Open 95 97 — Boost Pin = V+ —8 8— VOUT EFF Voltage Conversion Efficiency RL = ∞ 99 99.9 — % ZOSC Oscillator Impedance V + = 2V — 1 — M Ω V+ = 5V — 100 — k Ω 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 TC1044S. 2. Derate linearly above 50°C by 5.5mW/°C. ABSOLUTE MAXIMUM RATINGS* LV, Boost and OSC Inputs for V+ < 5.5V for V+ > 5.5V *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.

Charge Pump DC-TO-DC Voltage Converter 8 © 2001 Microchip Technology Inc. DS21348A TYPICAL CHARACTERISTICS (Cont.) Output Voltage vs. Output Current -10 -12 OUTPUT VOLTAGE V OUT (V) OUTPUT CURRENT (mA) 0 100 9080706040 503010 20 Output Source Resistance vs. Supply Voltage 100 OUTPUT SOURCE RESISTANCE ( Ω ) SUPPLY VOLTAGE (V) Output Source Resistance vs. Temperature 100 -40 -20 0 20 40 100 60 80 OUTPUT SOURCE RESISTANCE ( Ω ) TEMPERATURE ( °C) VIN = 2.5V VIN = 5.5V Power Conversion Efficiency vs. Load POWER EFFICIENCY (%) LOAD CURRENT (mA) Boost Pin = Open Boost Pin = V+ 100 60.0 55.0 50.0 40.0 35.0 30.0 25.0 20.0 15.0 10.0 9.0 7.5 6.0 4.5 3.0 2.0 1.5 1.0 IOUT = 20mA TA = 25°C Supply Current vs. Temperature 200 150 125 175 100 SUPPLY CURRENT I DD (µA) TEMPERATURE ( °C) -40 -20 0 20 40 100 60 80 VIN = 12.5V VIN = 5.5V

Charge Pump DC-TO-DC Voltage Converter TC1044S-12 9/16/96© 2001 Microchip Technology Inc. DS21348A PACKAGE DIMENSIONS Dimensions: inches (mm) 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) .400 (10.16) .370 (9.40) .300 (7.62) .230 (5.84) .065 (1.65) .045 (1.14) PIN 1 .200 (5.08) .160 (4.06) .200 (5.08) .125 (3.18) .110 (2.79) .090 (2.29) .020 (0.51) .016 (0.41) .040 (1.02) .020 (0.51) .320 (8.13) .290 (7.37) .150 (3.81) MIN. 3° MIN..015 (0.38) .008 (0.20) .400 (10.16) .320 (8.13) 8-Pin CerDIP

Charge Pump DC-TO-DC Voltage Converter 10 © 2001 Microchip Technology Inc. DS21348A 8-Pin SOIC .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) PACKAGE DIMENSIONS (CONT.) Dimensions: inches (mm)

Charge Pump DC-TO-DC Voltage Converter TC1044S-12 9/16/96© 2001 Microchip Technology Inc. DS21348A 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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