LT1312 Single PCMCIA VPP Driver/Regulator OBSOLETE: FOR INFORMATION PURPOSES ONLY Contact Linear Technology for Potential Replacement FEATURES DESCRIPTION n Digital Selection of 0V, V , 12V or Hi-Z The LT 1312 is a member of Linear Technology CC n 120mA Output Current Capability Corporations family of PCMCIA drivers/regulators. The n Internal Current Limiting and Thermal Shutdown LT1312 provides 0V, 3.3V, 5V, 12V and Hi-Z regulated n Automatic Switching from 3.3V to 5V power to the VPP pin of a PCMCIA card slot from a single n Powered from Unregulated 13V to 20V Supply unregulated 13V to 20V supply. When used in conjunction n Logic Compatible with Standard PCMCIA Controllers with a PC card interface controller, the LT1312 forms a n 1mF Output Capacitor complete minimum component-count interface for palm- n 30mA Quiescent Current in Hi-Z or 0V Mode top, pen-based and notebook computers. The VPP output n VPP Valid Status Feedback Signal voltage is selected by two logic compatible digital inputs n No VPP Overshoot which interface directly with industry standard PC card n 8-Pin SO Packaging interface controllers. Automatic 3.3V to 5V switching is provided by an internal U comparator which continuously monitors the PC card V CC APPLICATIONS supply and automatically adjusts the regulated VPP out- n Notebook Computers put to match V when the VPP = V mode is selected. CC CC n Palmtop Computers An open-collector VPP VALID output is driven low when n Pen-Based Computers VPP is in regulation at 12V. n Handi-Terminals n Bar-Code Readers The LT1312 is available in an 8-pin SO package. n Flash Memory Programming , LTC and LT are registered trademarks of Linear Technology Corporation. TYPICAL APPLICATION Typical PCMCIA Single Slot VPP Driver 13V TO 20V V S Linear Technology PCMCIA Product Family VPP1 EN0 VPP VPP2 OUT PCMCIA DEVICE DESCRIPTION PACKAGE PCMCIA CARD SLOT EN1 LT1312 CARD SLOT CONTROLLER LT1312 SINGLE PCMCIA VPP DRIVER/REGULATOR 8-PIN SO V VALID SENSE CC LT1313 DUAL PCMCIA VPP DRIVER/REGULATOR 16-PIN SO* GND 3.3V OR 5V LT1312 TA1 + C LTC 1314 SINGLE PCMCIA SWITCH MATRIX 14-PIN SO OUT 1mF TANTALUM LTC1315 DUAL PCMCIA SWITCH MATRIX 24-PIN SSOP LTC1470 PROTECTED V 5V/3.3V SWITCH MATRIX 8-PIN SO CC LT1312 TRUTH TABLE LTC1472 PROTECTED V AND VPP SWITCH MATRIX 16-PIN SO* CC EN0 EN1 SENSE VPP VALID OUT 0 0 X 0V 1 *NARROW BODY 1 0 X 12V 0 0 1 3.0V TO 3.6V 3.3V 1 0 1 4.5V TO 5.5V 5V 1 1 1 X Hi-Z 1 X = DONT CARE 1 U ULT1312 ABSOLUTE MAXIMUM RATINGS PACKAGE/ORDER INFORMATION Supply Voltage ........................................................ 22V TOP VIEW ORDER PART Digital Input Voltage ........................ 7V to (GND 0.3V) NUMBER GND 1 8 VPP OUT Sense Input Voltage......................... 7V to (GND 0.3V) ENO 2 7 N.C. Valid Output Voltage ...................... 15V to (GND 0.3V) LT1312CS8 EN1 V 3 6 S Output Short-Circuit Duration .......................... Indefinite VALID SENSE 4 5 Operating Temperature ................................ 0 C to 70 C S8 PART MARKING S8 PACKAGE Junction Temperature................................ 0 C to 125 C 8-LEAD PLASTIC SO 1312 Storage Temperature Range ..................65 C to 150 C T = 125 C, q = 150 C/ W JMAX JA Lead Temperature (Soldering, 10 sec).................. 300 C Consult factory for Industrial and Military grade parts. ELECTRICAL CHARACTERISTICS V = 13V to 20V, T = 25 C, unless otherwise noted. S A SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS VPP Output Voltage Program to 12V, I 120mA (Note 1) l 11.52 12.00 12.48 V OUT OUT Program to 5V, I 30mA (Note 1) l 4.75 5.00 5.25 V OUT Program to 3.3V, I 30mA (Note 1) l 3.135 3.30 3.465 V OUT Program to 0V, I = 300m A 0.42 0.60 V OUT I Output Leakage Program to Hi-Z, 0V VPP 12V l 10 10 m A LKG OUT I Supply Current Program to 0V l 30 50 m A S Program to Hi-Z l 30 50 m A Program to 12V, No Load l 230 360 m A Program to 5V, No Load l 75 120 m A Program to 3.3V, No Load l 55 90 m A Program to 12V, I = 120mA l 126 132 mA OUT Program to 5V, I = 30mA l 31 33 mA OUT Program to 3.3V, I = 30mA l 31 33 mA OUT I Current Limit Program to 3.3V, 5V or 12V 330 500 mA LIM V Enable Input High Voltage l 2.4 V ENH V Enable Input Low Voltage l 0.4 V ENL I Enable Input High Current 2.4V V 5.5V 20 50 m A ENH IN I Enable Input Low Current 0V V 0.4V 0.01 1 m A ENL IN V V Sense Threshold VPP = 3.3V to 5V l 3.60 4.05 4.50 V SEN5 CC OUT V V Sense Threshold VPP = 5V to 3.3V l 3.60 4.00 4.50 V SEN3 CC OUT I V Sense Input Current V = 5V 38 60 m A SEN CC SENSE V = 3.3V 18 30 m A SENSE V VPP Threshold Voltage Program to 12V l 10.5 11 11.5 V VALID TH VALID I VPP Output Drive Current Program to 12V, V = 0.4V 1 3.3 mA VALID VALID VALID VPP Output Leakage Current Program to 0V, V = 12V 0.1 10 m A VALID VALID The l denotes the specifications which apply over the full operating Note 1: For junction temperatures greater than 110 C, a minimum load temperature range. of 1mA is recommended. 2 U W U W U WW