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LT1106 Datasheet(PDF) 1 Page - Linear Technology |
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LT1106 Datasheet(HTML) 1 Page - Linear Technology |
1 / 8 page 1 LT1106 Micropower Step-Up DC/DC Converter for PCMCIA Card Flash Memory S FEATURE DESCRIPTIO The LT®1106 is the industry’s first DC/DC converter designed for use on Type I and Type II PCMCIA cards. The device senses the VPP1 and VPP2 lines at the PCMCIA socket and generates a regulated 12V, 60mA program- ming supply if the socket does not provide it. Internal logic simplifies the interface to PCMCIA card microcontrollers. One input selects a 12V or 5V regulated output, while another input controls micropower shutdown. Two logic outputs indicate when the selected programming voltage is valid and whether the input supply is 3.3V or 5V. TheregulatorfeaturesBurstModeTM operationwitha0.5A, 300mV switch for efficiency up to 85%. High frequency 500kHz switching permits the use of small value, flat inductors that fit neatly on PCMCIA cards. The device requires just 1 µF of output capacitance. Quiescent current is 750 µA which drops to 350µA when the card runs off the socket supply. The shutdown pin reduces supply current to only 10 µA. The device includes a soft start feature which limits supply current transients when the card is inserted into a hot socket. S APPLICATI I PCMCIA Card Flash Memory VPP Generator I Portable Computers I Portable Instruments I DC/DC Converter Module Replacements I 60mA Output Current at 12V from 3V Supply I Shutdown to 10 µA I Programmable 12V or 5V Output I Up to 85% Efficiency I Quiescent Current: 750 µA I Low VCESAT Switch: 300mV at 0.5A Typical I Uses Low Value, Thin, Surface Mount Inductors I Ultra-Thin 20-Lead TSSOP Package , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a trademark of Linear Technology Corporation. LOAD CURRENT (mA) 1 70 72 74 76 78 86 10 100 LT1106 • TA02 80 82 84 VIN = 5V VIN = 5V VIN = 3.3V VIN = 3.3V D1 = MBR0530 D1 = 4 BAT54Cs IN PARALLEL 12V Output Efficiency 12V, 60mA Flash Memory Programming Supply APPLICATI TYPICAL VCC VPP1 G1 VPP2 G2 ON/OFF GND PGND SW D S BSS84 D S BSS84 POWER ON DALE ILS-3825-01 OR COILTRONICS CTX02-11238-3 MOTOROLA MBR0530 * ** LT1106 • TA01 12/5 SOFT START AVPP 1M 0.1 µF 3/5 DETECT VPP VALID 1 µF D1** L1* 10 µH 0.1 µF 4.7 µF TANT ALUM VPP1 VPP2 VCC 3.3V/5V LT1106 VPP VALID 3/5 12V/60mA 0.1 µF 0.1 µF 470pF + FOR INFORMATION PURPOSES ONLY OBSOLETE: Contact Linear Technology for Potential Replacement |
Similar Part No. - LT1106_02 |
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Similar Description - LT1106_02 |
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