LT1965 Series 1.1A, Low Noise, Low Dropout Linear Regulator Features Description n Output Current: 1.1A The LT 1965 series are low noise, low dropout linear regu- n Dropout Voltage: 310mV lators. The devices supply 1.1A of output current with a n Low Noise: 40V (10Hz to 100kHz) 310mV typical dropout voltage. Operating quiescent current RMS n 500A Quiescent Current (Adjustable Version) is 500A for the adjustable version, reducing to <1A in n Wide Input Voltage Range: 1.8V to 20V shutdown. Quiescent current is well controlled it does not n No Protection Diodes Needed rise in dropout as with many other regulators. The LT1965 n Controlled Quiescent Current in Dropout regulators have very low output noise which makes them n Adjustable Output from 1.20V to 19.5V ideal for sensitive RF and DSP supply applications. n Fixed Output Voltages: 1.5V, 1.8V, 2.5V, 3.3V Output voltage ranges from 1.20V to 19.5V. The LT1965 n < 1A Quiescent Current in Shutdown regulators are stable with output capacitors as low as n Stable with 10F Output Capacitor 10F. Internal protection circuitry includes reverse-battery n Stable with Ceramic or Tantalum Capacitors protection, current limiting with foldback, thermal limit- n Reverse-Battery Protection ing and reverse-current protection. The LT1965 series n No Reverse Current are available in fixed output voltages of 1.5V, 1.8V, 2.5V, n Current Limit with Foldback Protection 3.3V, and as an adjustable device with a 1.20V reference n Thermal Limiting voltage. The package offerings include the 5-lead TO-220, n 5-Lead TO-220, DD-Pak, Thermally Enhanced 8-Lead 5-lead DD-Pak as well as the thermally enhanced 8-lead MSOP and 8-Lead 3mm 3mm DFN Packages MSOP and low profile (0.75mm) 8-lead 3mm 3mm DFN. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and a ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Logic Power Supplies n Post Regulator for Switching Supplies n Low Noise Instrumentation t a Dropout Voltage 400 3.3V to 2.5V Regulator T = 25C J 350 300 2.5V IN OUT 1.1A + + V > 3V 250 IN 10F* 10F* TO 20V LT1965-2.5 200 SHDN SENSE 150 GND *CERAMIC OR TANTALUM 100 1965 TA01 50 0 0 0.2 0.4 0.6 0.8 1 1.2 OUTPUT CURRENT (A) 1965 TA01b 1965fb 1 For more information www.linear.com/LT1965 DROPOUT VOLTAGE (mV) pplication ypical pplicationsLT1965 Series a MaxiMMu r (Note 1) Output Short-Circuit Duration .......................... Indefinite IN Pin Voltage .........................................................22V Operating Junction Temperature Range (Notes 3, 5, 13) OUT Pin Voltage ......................................................22V E-, I-Grades ....................................... 40C to 125C Input to Output Differential Voltage (Note 2) ......... 22V H-Grade ............................................. 40C to 150C SENSE Pin Voltage ..................................................22V Storage Temperature Range ..................65C to 150C ADJ Pin Voltage ........................................................9V Lead Temperature (Soldering, 10 sec) SHDN Pin Voltage ...................................................22V (Only for MSOP, TO-220, DD-Pak Packages) ....300C p Fc TOP VIEW TOP VIEW OUT 1 8 IN OUT 1 8 IN OUT 2 7 IN OUT 2 7 IN 9 9 SENSE/ADJ* 3 6 SHDN SENSE/ADJ* 3 6 SHDN GND 4 5 GND GND 4 5 GND MS8E PACKAGE 8-LEAD PLASTIC MSOP DD PACKAGE T = 125C, = 60C/W, = 10C/W JMAX JA JC 8-LEAD (3mm 3mm) PLASTIC DFN EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB T = 150C, = 65C/W, = 3C/W JMAX JA JC *PIN 3 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3 EXPOSED PAD (PIN 9) IS GND, MUST BE SOLDERED TO PCB *PIN 3 = ADJ FOR LT1965 *PIN 3 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3 *PIN 3 = ADJ FOR LT1965 FRONT VIEW FRONT VIEW 5 SENSE/ADJ* 5 SENSE/ADJ* 4 OUT 4 OUT TAB IS TAB IS 3 GND 3 GND GND GND 2 IN 2 IN 1 SHDN 1 SHDN Q PACKAGE T PACKAGE 5-LEAD PLASTIC DD-PAK 5-LEAD PLASTIC TO-220 T = 150C, = 50C/W, = 3C/W T = 150C, = 30C/W, = 3C/W JMAX JA JC JMAX JA JC *PIN 5 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3 *PIN 5 = SENSE FOR LT1965-1.5/LT1965-1.8/LT1965-2.5/LT1965-3.3 *PIN 5 = ADJ FOR LT1965 *PIN 5 = ADJ FOR LT1965 Dro Fni M LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT1965EDD PBF LT1965EDD TRPBF LCXW 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1965IDD PBF LT1965IDD TRPBF LCXW 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1965EDD-1.5 PBF LT1965EDD-1.5 TRPBF LDKW 40C to 125C 8-Lead (3mm 3mm) Plastic DFN LT1965IDD-1.5 PBF LT1965IDD-1.5 TRPBF LDKW 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1965EDD-1.8 PBF LT1965EDD-1.8 TRPBF LDKY 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1965IDD-1.8 PBF LT1965IDD-1.8 TRPBF LDKY 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1965EDD-2.5 PBF LT1965EDD-2.5 TRPBF LDMB 8-Lead (3mm 3mm) Plastic DFN 40C to 125C LT1965IDD-2.5 PBF LT1965IDD-2.5 TRPBF LDMB 40C to 125C 8-Lead (3mm 3mm) Plastic DFN LT1965EDD-3.3 PBF LT1965EDD-3.3 TRPBF LDMD 8-Lead (3mm 3mm) Plastic DFN 40C to 125C 1965fb 2 For more information www.linear.com/LT1965 ation or er iguration on in atings bsolute