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LTC1983-3 Datasheet(PDF) 1 Page - Linear Technology |
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LTC1983-3 Datasheet(HTML) 1 Page - Linear Technology |
1 / 12 page LTC1983-3/LTC1983-5 1 1983fa The LTC ®1983-3 and LTC1983-5 are inverting charge pump DC/DC converters that produce negative regulated outputs. The parts require only three tiny external capaci- tors and can provide up to 100mA of output current. The devices can operate in open loop mode (creating a –VIN supply) or regulated output mode depending on the input supply voltage and the output current. The LTC1983-3/LTC1983-5 have many useful features for portable applications including very low quiescent current (25 µA typical) and a zero current shutdown mode pro- grammed through the SHDN pin. The LTC1983-3/LTC1983-5 are over-temperature and short-circuit protected. The parts are available in a 6-pin low profile (1mm) ThinSOT package. ■ –3V Generation in Single-Supply Systems ■ Portable Equipment ■ LCD Bias Supplies ■ GaAs FET Bias Supplies ■ Fixed Output Voltages: –3V, –5V or Low Noise VIN to –VIN Inverted Output ■ ±4% Output Voltage Accuracy ■ Low Quiesient Current: 25 µA ■ 100mA Output Current Capability ■ 2.3V to 5.5V Operating Voltage Range ■ Internal 900kHz Oscillator ■ “Zero Current” Shutdown ■ Short-Circuit and Over-Temperature Protected ■ Low Profile (1mm) ThinSOT TM Package 100mA Regulated Charge-Pump Inverters in ThinSOT VIN SHDN C + VOUT GND C – LTC1983-3 VIN 3V TO 5.5V VOUT = –3V IOUT = UP TO 100mA COUT 10 µF CIN 10 µF CFLY 1 µF OFF ON CFLY: TAIYO YUDEN LMK212BJ105 CIN, COUT: TAIYO YUDEN JMK316BJ106ML 1983-3 TA01 VOUT vs IOUT IOUT (mA) 0 –3.3 –3.2 –3.1 –3.0 –2.9 –2.8 –2.7 20 40 60 80 1983 TA02 100 VIN = 5V VIN = 3.3V DESCRIPTIO FEATURES APPLICATIO S TYPICAL APPLICATIO –3V at 100mA DC/DC Converter , LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. |
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