AMS682_05 ADMOS | Alldatasheet

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Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 Advanced AMS682 Monolithic INVERTING VOLTAGE DOUBLER Systems RoHS compliant FEATURES APPLICATIONS

  • 99.9% Voltage Conversion Efficiency • Portable Handheld Instrumentation
  • 92% Power Conversion Efficiency • Cellular Phones
  • Wide Input Voltage Range +2.4V to 5.5V • Panel Meters
  • 185µA Supply Current • -10V from +5V logic Supply
  • Available in SO-8 and PDIP Packages • -6V from a Single 3V Lithium Cell
  • Only 3 external Capacitors Required • LCD Display Bias Generator
  • Operational Amplifiers Power Supplies GENERAL DESCRIPTION The AMS682 is a CMOS charge pump conve rter that provides an inverted doubled output from a single positive supply. Requiring only three external capacitors fo r full circuit implementation the device ha s an on -board 12kHz (typical) oscillator which provides the clock. Low output source impedance (typically 140 Ω), provides output current up to 10mA. The AMS682 features low quiescent current and high efficiency, making it the ideal choice for a wide variety of applications that require a negative voltage derived from a single positive supply. The compact size and minimum exte rnal parts count of the AMS 682 makes it useful in many medium current, dual voltage analog power supplies. The AMS682E is operational in the full industrial temperature range of -40 °C to 85 °C while AMS682C is operating over a 0°C to 70°C temperature range. The AMS682E/AMS682C are available in surface mount 8-Pin SOIC (SO-8) and 8-Pin Plastic DIP (PDIP) packages. ORDERING INFORMATION: PACKAGE TYPE OPERATING

8 LEAD SOIC 8 LEAD PDIP TEMPERATURE RANGE

AMS682ES AMS682EP -40 to 85° C AMS682CS AMS682CP 0 to 70° C TYPICAL OPERATING CIRCUIT PIN CONFIGURATIONS VIN VOUT GND All Caps = 3.3µF VOUT = -(2 X VIN) +2.4V < VIN < +5.5V COUT VIN VOUT GND ON/OFF 8-LEAD DIP/ 8-LEAD SOIC AMS682 ON/OFF VIN GNDVOUT

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS682 ABSOLUTE MAXIMUM RATINGS VIN +5.8V Operating Temperature Range VIN ∆V/∆T 1V/ µsec AMS682E -40°C to 85°C VOUT -11.6V AMS682C 0°C to 70°C VOUT Short Circuit Duration Continuous Storage temperature -85°C to +150°C Power Dissipation (TA ≤ 70°C) Soldering information Plastic DIP 730mW Lead Temperature (Soldering 25sec) 265°C SOIC 470mW

ELECTRICAL CHARACTERISTICS

Electrical Characteristics at VIN =+5V and TA = +25°C test circuit figure 1, unless otherwise specified. Parameter Conditions AMS682 Min Typ Max Units Supply Voltage Range VIN RL=2kΩ 2.4 ⎯ 5.5 V Supply Current IIN RL = ∞ RL = ∞ 185 300 400 µA VOUT Source Resistance Source Resistance ROUT I - L = 10mA L =10mA L = 5mA , VIN = 2.8V 140 170 180 230 320 Ω Oscillator Frequency F OSC ⎯ 12 ⎯ kHz Power Efficiency P EFF RL = 2kΩ 90 92 ⎯ % Voltage Conversion Efficiency V OUTEFF VOUT RL= ∞ 99 99.9 ⎯ % PIN DESCRIPTION P I N N O 8-PIN DIP/SOIC SYMBOL DESCRIPTION 1 C - Input. Capacitor C1 negative t e r m i n a l . 2 C + Input. Capacitor C2 positive terminal.

3 C 2

  • Input. Capacitor C2 negative terminal 4 V OUT Output. Negative output voltage (-2VIN) 5 GND Input. Device ground. 6 V IN Input. Power supply voltage.

7 C 1

+ Input. Capacitor C1 positive terminal. 8 ON/OFF ON/OFF Oscilator. VIN (+5V) OUT GND All Caps = 3.3µF 1 C1 - V-OUT VIN ON/OFF GND COUT RL Figure 1. AMS682 Test Circuit

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS682 TYPICAL PERFORMANCE CHARACTERISTICS (FOSC = 12kHz) VIN = 5V VIN = 5V IOUT = 10mA NO LOAD VIN = 5V C3 = 10 µF -7.5 -8.0 -8.5 -9.0 -9.5 -10.0 -10.5 05 10 15 240 220 180 160 140 120 1 234 5 6 VOUT vs. Load Current Output Resistance vs. V IN 200 OUTPUT RESISTANCE (Ω) VOUT (V) VIN (V)LOAD CURRENT 200 180 160 140 120 100 -50 0 50 100 12 3 46 5 300 250 200 150 100 SUPPLY CURRENT ( µA) VIN (V) OUTPUT SOURCE RESISTANCE ( Ω) Output Source Resistance vs. Temperature TEMPERATURE (°C) 200 150 100 0 51 0 15 20 OUTPUT CURRENT (mA) Output Ripple vs. Output Current OUTPUT RIPPLE (mV PK-PK) Supply Current vs. VIN C1-C3 = 3.3µF C3 = 100µF

Advanced Monolithic Systems, Inc. www.advanced-monolithic.com Phone (925) 443-0722 Fax (925) 443-0723 AMS682 PACKAGE DIMENSIONS inches (millimeters) unless otherwise noted.

8 LEAD SOIC PLASTIC PACKAGE (S)

8 LEAD PLASTIC DIP PACKAGE (P)

0°-8° TYP 0.010-0.020 (0.254-0.508) S (SO-8 ) AMS DRW# 042293 x 45° 0.016-0.050 (0.406-1.270) 0.008-0.010 (0.203-0.254) 0.004-0.010 (0.101-0.254) 0.014-0.019 (0.355-0.483) 0.053-0.069 (1.346-1.752) 0.050 (1.270) TYP 0.150-0.157** (3.810-3.988) 0.228-0.244 (5.791-6.197) 0.189-0.197* (4.801-5.004) *DIMENSION DOES NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.006" (0.152mm) PER SIDE **DIMENSION DOES NOT INCLUDE INTERLEAD FLASH. INTERLEAD FLASH SHALL NOT EXCEED 0.010" (0.254mm) PER SIDE 12 34 87 65 0.045-0.065 (1.143-1.651) 0.255±0.015* (6.477±0.381) 0.400* (10.160) MAX 12 3 4 87 65 0.130±0.005 (3.302±0.127) 0.018±0.003 (0.457±0.076) 0.100±0.010 -0.381 0.325 +0.025 -0.015 0.009-0.015 (0.229-0.381) 0.300-0.325 (7.620-8.255) 0.065 (1.651) TYP 0.005 (0.127) MIN 0.125 (3.175) MIN 0.015 (0.380) MIN *DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTUSIONS. MOLD FLASH OR PROTUSIONS SHALL NOT EXCEED 0.010" (0.254mm) P (8L PDIP ) AMS DRW# 042294