LT1534/LT1534-1 WWWUABSOLUTE MAXIMUM RATINGS (Note 1) Input Voltage (VIN) .. 30V Operating Junction Temperature Range Switch Voltage (COL) .. 35V LT1534C .. 0°C to 125°C SHDN Pin Voltage .. 30V LT1534I .. – 40°C to 125°C Feedback Pin Current (FB) .. 10mA Maximum Junction Temperature .. 125°C Negative Feedback Pin Current (NFB) .. ±10mA Storage Temperature Range ... – 65°C to 150°C Lead Temperature (Soldering, 10 sec.)... 300°C UWUPACKAGE/ORDER INFORMATION ORDER PART ORDER PART TOP VIEW NUMBER NUMBER TOP VIEW GND 1 16 GND NC 1 16 PGND LT1534CS COL 2 15 VIN LT1534CS-1 COL 2 15 COL LT1534IS PGND 3 14 RVSL LT1534IS-1 *NC 3 14 V SYNC 4 13 IN RCSL SYNC 4 13 R C 5 12 VSL T SHDN C 5 12 T R R 6 11 CSL T VC R 6 11 T SHDN FB 7 10 NFB FB 7 10 V GND 8 9 C GND NFB 8 9 GND S PACKAGE 16-LEAD PLASTIC SO S PACKAGE **FOUR CORNER PINS ARE FUSED TO INTERNAL 16-LEAD PLASTIC SO DIE ATTACH PADDLE FOR HEAT SINKING. *DO NOT CONNECT CONNECT THESE FOUR PINS TO EXPANDED T PC LANDS FOR PROPER HEAT SINKING. JMAX = 125°C, θJA = 100°C/ W TJMAX = 125°C, θJA = 50°C/ W Consult factory for Military grade parts. ELECTRICAL CHARACTERISTICS The ● denotes the specifications which apply over the full operatingtemperature range, otherwise specifications are at TA = 25 ° C, VIN = 5V, VC = 0.9V, VFB = VREF. COL, SHDN, NFB, all other pins openunless otherwise noted.SYMBOLPARAMETERCONDITIONSMINTYPMAXUNITSSupply and Protection VIN Recommended Operating Range ● 2.7 23 V VIN(MIN) Minimum Input Voltage ● 2.55 2.7 V IVIN Operating Supply Current 2.7V ≤ VIN ≤ 23V, RVSL, RCSL, RT = 17k ● 12 30 mA IVIN(OFF) Shutdown Supply Current 2.7V ≤ VIN ≤ 23V, VSHDN = 0V ● 12 50 µA 2.7V ≤ VIN ≤ 23V, VSHDN = 0V 12 30 µA VSHDN Shutdown Threshold 2.7V ≤ VIN ≤ 23V ● 0.4 0.8 1.2 V ISHDN Shutdown Input Current – 2 µA Error Amplifiers VREF Reference Voltage Measured at Feedback Pin 1.235 1.250 1.265 V ● 1.215 1.250 1.275 V IFB Feedback Input Current VFB = VREF ● 250 900 nA FBREG Reference Voltage Line Regulation 2.7V ≤ VIN ≤ 23V ● 0.003 0.03 %/V 2
