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LT1614IS8 Datasheet(PDF) 1 Page - Linear Technology |
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LT1614IS8 Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LT1614 Inverting 600kHz Switching Regulator July 1998 FEATURES DESCRIPTION The LT ®1614 is a fixed frequency, inverting mode switch- ing reglator that operates from an input voltage as low as 1V. Utilizing a low noise topology, the LT1614 can gener- ate a negative output down to – 24V from a 1V to 5V input. Fixed frequency switching ensures a clean output free from low frequency noise. The device contains a low- battery detector with a 200mV reference and shuts down to less than 10 µA.NoloadquiescentcurrentoftheLT1614 is 1mA and the internal NPN power switch handles a 500mA current with a voltage drop of just 295mV. High frequency switching enables the use of small induc- tors and capacitors. Ceramic capacitors can be used in many applications, eliminating the need for bulky tanta- lum types. The LT1614 is available in 8-lead MSOP or SO packages. s Better Regulation Than a Charge Pump s 0.1 Ω Effective Output Impedance s – 5V at 200mA from a 5V Input s 600kHz Fixed Frequency Operation s Operates with VIN as Low as 1V s 1mA Quiescent Current s Low Shutdown Current: 10 µA s Low-Battery Detector s Low VCESAT Switch: 295mV at 500mA Final Electrical Specifications Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. , LTC and LT are registered trademarks of Linear Technology Corporation. s MR Head Bias s LCD Bias s GaAs FET Bias s Positive-to-Negative Conversion APPLICATIONS TYPICAL APPLICATION 5V to – 5V Converter Efficiency 5V to – 5V Converter VIN SW LT1614 L1 22 µH VIN 5V D1 NFB SHDN 69.8k 24.9k 100k 1nF VOUT – 5V 200mA C1, C2: AVX TAJB336M010 C3: AVX 1206CY106 D1: MBR0520 L1, L2: MURATA LQH3C220 1614 TA01 C1 33 µF C2 33 µF VC GND L2 22 µH C3 1 µF + LOAD CURRENT (mA) 310 30 60 70 80 90 100 300 1614 TA02 50 40 |
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