LT1963 Series 1.5A, Low Noise, Fast Transient Response LDO Regulators FEATURES DESCRIPTIO Optimized for Fast Transient Response The LT 1963 series are low dropout regulators optimized Output Current: 1.5A for fast transient response. The devices are capable of Dropout Voltage: 340mV supplying 1.5A of output current with a dropout voltage of Low Noise: 40V (10Hz to 100kHz) 340mV. Operating quiescent current is 1mA, dropping to RMS 1mA Quiescent Current <1A in shutdown. Quiescent current is well controlled it No Protection Diodes Needed does not rise in dropout as it does with many other Controlled Quiescent Current in Dropout regulators. In addition to fast transient response, the Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V LT1963 regulators have very low output noise which Adjustable Output from 1.21V to 20V makes them ideal for sensitive RF supply applications. <1A Quiescent Current in Shutdown Output voltage range is from 1.21V to 20V. The LT1963 Stable with 10F Output Capacitor regulators are stable with output capacitors as low as Reverse Battery Protection 10F. Internal protection circuitry includes reverse battery No Reverse Current protection, current limiting, thermal limiting and reverse Thermal Limiting current protection. The devices are available in fixed 5-Lead TO-220, DD, 3-Lead SOT-223, 8-Lead SO output voltages of 1.5V, 1.8V, 2.5V, 3.3V and as an and 16-Lead TSSOP Packages adjustable device with a 1.21V reference voltage. The LT1963 regulators are available in 5-lead TO-220, DD, U APPLICATIO S 3-lead SOT-223, 8-lead SO, and Exposed Pad 16-lead TSSOP packages. 3.3V to 2.5V Logic Power Supplies , LTC and LT are registered trademarks of Linear Technology Corporation. Post Regulator for Switching Supplies All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 6118263, 6144250. TYPICAL APPLICATION Dropout Voltage 400 350 3.3V to 2.5V Regulator 300 2.5V 250 IN OUT 1.5A + + V > 3V 10F 10F 200 IN LT1963-2.5 150 SHDN SENSE 100 GND 1963 TA01 50 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 OUTPUT CURRENT (A) 1963 TA02 1963fc 1 DROPOUT VOLTAGE (mV) U ULT1963 Series ABSOLUTE AXI U RATI GS (Note 1) IN Pin Voltage ........................................................ 20V SHDN Pin Voltage ................................................. 20V OUT Pin Voltage .................................................... 20V Output Short-Circuit Duration ......................... Indefinite Input to Output Differential Voltage (Note 2) ......... 20V Operating Junction Temperature Range 40C to 125C SENSE Pin Voltage ............................................... 20V Storage Temperature Range ................. 65C to 150C ADJ Pin Voltage ...................................................... 7V Lead Temperature (Soldering, 10 sec).................. 300C UUW PACKAGE/ORDER I FOR ATIO TOP VIEW FRONT VIEW FRONT VIEW GND 1 16 GND SENSE/ 5 SENSE/ADJ* 5 ADJ* NC 2 15 NC 4 OUT 4 OUT OUT 3 14 IN TAB IS 3 3 GND GND GND OUT 4 13 IN *PIN 6 = SENSE FOR LT1963-1.5/ 17 2 IN 2 IN LT1963-1.8/LT1963-2.5/ OUT 5 12 IN 1 1 SHDN SHDN LT1963-3.3 SENSE/ADJ* 6 11 NC = ADJ FOR LT1963 TAB IS T PACKAGE Q PACKAGE GND 7 10 SHDN GND 5-LEAD PLASTIC TO-220 5-LEAD PLASTIC DD GND 8 9 GND *PIN 5 = SENSE FOR LT1963-1.5/LT1963-1.8/ *PIN 5 = SENSE FOR LT1963-1.5/LT1963-1.8/ FE PACKAGE LT1963-2.5/LT1963-3.3 LT1963-2.5/LT1963-3.3 16-LEAD PLASTIC TSSOP = ADJ FOR LT1963 = ADJ FOR LT1963 EXPOSED PAD (PIN 17) IS GND. MUST BE SOLDERED TO THE PCB. T = 150C, = 50C/ W T = 150C, = 30C/ W JMAX JA JMAX JA T = 150C, = 38C/ W JMAX JA ORDER PART NUMBER ORDER PART NUMBER ORDER PART NUMBER FE PART MARKING LT1963EQ LT1963ET LT1963EFE 1963EFE LT1963EQ-1.5 LT1963ET-1.5 LT1963EFE-1.5 1963EFE15 LT1963EQ-1.8 LT1963ET-1.8 LT1963EFE-1.8 1963EFE18 LT1963EQ-2.5 LT1963ET-2.5 LT1963EFE-2.5 1963EFE25 LT1963EQ-3.3 LT1963ET-3.3 LT1963EFE-3.3 1963EFE33 TOP VIEW FRONT VIEW OUT 1 8 IN 3 OUT SENSE/ADJ* 2 7 GND TAB IS GND 3 6 GND 2 GND GND NC 4 5 SHDN 1 IN S8 PACKAGE 8-LEAD PLASTIC SO ST PACKAGE *PIN 2 = SENSE FOR LT1963-1.5/LT1963-1.8/ 3-LEAD PLASTIC SOT-223 LT1963-2.5/LT1963-3.3 = ADJ FOR LT1963 T = 150C, = 50C/ W JMAX JA T = 150C, = 70C/ W JMAX JA ORDER PART NUMBER ST PART MARKING ORDER PART NUMBER S8 PART MARKING LT1963EST-1.5 196315 LT1963ES8 1963 LT1963EST-1.8 196318 LT1963ES8-1.5 196315 LT1963EST-2.5 196325 LT1963ES8-1.8 196318 LT1963EST-3.3 196333 LT1963ES8-2.5 196325 LT1963ES8-3.3 196333 Order Options Tape and Reel: Add TR Lead Free: Add PBF Lead Free Tape and Reel: Add TRPBF Lead Free Part Marking: