LT3050 Series 100mA, Linear Regulator with Precision Current Limit and Diagnostic Outputs FEATURES DESCRIPTION th n Output Current Monitor: 1/100 of I The LT 3050 series are micro-power, low noise, low OUT n Fault Indicator: Current Limit, Minimum I or dropout voltage (LDO) linear regulators. The devices OUT Thermal Limit supply 100mA of output current with a dropout voltage of n Output Current: 100mA 340mV. A 10nF bypass capacitor reduces output noise to n Dropout Voltage: 340mV 30V in a 10Hz to 100kHz bandwidth and soft-starts RMS n Input Voltage Range: 1.6V to 45V the reference. The LT3050s 45V input voltage rating n Programmable Precision Current Limit: 5% combined with its precision current limit and diagnostic n Programmable Minimum I Monitor functions make the IC an ideal choice for robust, high OUT n reliability applications. Low Noise: 30V (10Hz to 100kHz) RMS n Adjustable Output (V = V = 0.6V) REF OUT(MIN) A single resistor programs the LT3050s current limit, accurate n Fixed Output Voltages: 3.3V, 5V to 5% over a wide input voltage and temperature range. n Output Tolerance: 2% Over Line, Load and Temperature A single resistor programs the LT3050s minimum output n Stable with Low ESR, Ceramic Output Capacitors current monitor, useful for detecting open-circuit conditions. (2.2F minimum) The current monitor function sources a current equal to n Shutdown Current: <1A 1/100th of output current. A logic FAULT pin asserts low if n Reverse-Battery, Reverse-Output and the LT3050 is in current limit, operating below its minimum Reverse-Current Protection output current (open-circuit) or is in thermal shutdown. n Thermal Limit Protection The LT3050 optimizes stability and transient response n 12-Lead 3mm 2mm DFN and MSOP Packages with low ESR ceramic capacitors, requiring a minimum of 2.2F. The LT3050 is available in xed output voltages of APPLICATIONS 3.3V and 5V, and as an adjustable version with an output n voltage range down to the 0.6V reference.The LT3050 is Protected Antenna Supplies n available in the thermally-enhanced 12-Lead 3mm 2mm Automotive Telematics DFN and MSOP packages. n Industrial Applications (Trucks, Forklifts, etc.) L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n High Reliability Applications Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION External Current Limit R = 1.15k IMAX 105 5V Supply with 100mA Precision Current Limit, 10mA I MIN V = 5V OUT 104 IN OUT 5V 103 12V SHDN 2.2F V = 15V 1F 120k 102 IN V IN 101 FAULT 100 V = 12V LT3050-5 IN I 99 MAX I TO P ADC MON 1.15k 10nF V = 5.6V IN 98 3k (THRESHOLD = 100mA) 0.1F (ADC FULL SCALE = 3V) 97 I REF/BYP 96 MIN 11.3k 0.1F GND 95 10nF (THRESHOLD = 10mA) 75 50 25 0 25 50 75 100 125 150 175 3050 TA01 TEMPERATURE (C) 3050 TA01a 3050fa 1 CURRENT LIMIT FAULT THRESHOLD (mA)LT3050 Series ABSOLUTE MAXIMUM RATINGS (Note 1) IN Pin Voltage ........................................................ 50V FAULT Pin Voltage ..........................................0.3V, 50V OUT Pin Voltage ..................................................... 50V Output Short-Circuit Duration .......................... Inde nite Input-to-Output Differential Voltage ....................... 50V Operating Junction Temperature Range (Notes 2, 3) ADJ Pin Voltage (Note 16) ..................................... 50V E, I Grades .........................................40C to 125C REF/BYP Pin Voltage ........................................0.3V, 1V MP Grade ...........................................55C to 125C SHDN Pin Voltage ...................................................50V Storage Temperature Range ...................65C to 150C I Pin Voltage ..............................................0.3V, 7V Lead Temperature: Soldering, 10 sec .................... 300C MON I Pin Voltage ...............................................0.3V, 7V (MSOP Package Only) MIN I Pin Voltage ...............................................0.3V, 7V MAX PIN CONFIGURATION TOP VIEW TOP VIEW 1 REF/BYP 12 I MON REF/BYP 1 12 I MON I 2 11 I MIN MAX I 2 11 I MIN MAX 13 FAULT 3 10 GND FAULT 3 10 GND 13 GND SHDN 4 9 ADJ GND SHDN 4 9 ADJ IN 5 8 OUT IN 8 OUT 5 6 IN 7 OUT IN 6 7 OUT MSE PACKAGE 12-LEAD PLASTIC MSOP DDB PACKAGE 12-LEAD (3mm s 2mm) PLASTIC DFN T = 125C, = 45C/W, = 5C/W TO 10C/W JMAX JA JC T = 125C, = 49C/W, = 13.5C/W EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB JMAX JA JC EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3050EMSE PBF LT3050EMSE TRPBF 3050 12-Lead Plastic MSOP 40C to 125C LT3050IMSE PBF LT3050IMSE TRPBF 3050 12-Lead Plastic MSOP 40C to 125C LT3050MPMSE PBF LT3050MPMSE TRPBF 3050 12-Lead Plastic MSOP 55C to 125C LT3050EMSE-3.3 PBF LT3050EMSE-3.3 TRPBF 305033 12-Lead Plastic MSOP 40C to 125C LT3050IMSE-3.3 PBF LT3050IMSE-3.3 TRPBF 305033 12-Lead Plastic MSOP 40C to 125C LT3050MPMSE-3.3 PBF LT3050MPMSE-3.3 TRPBF 305033 12-Lead Plastic MSOP 55C to 125C LT3050EMSE-5 PBF LT3050EMSE-5 TRPBF 30505 12-Lead Plastic MSOP 40C to 125C LT3050IMSE-5 PBF LT3050IMSE-5 TRPBF 30505 12-Lead Plastic MSOP 40C to 125C LT3050MPMSE-5 PBF LT3050MPMSE-5 TRPBF 30505 12-Lead Plastic MSOP 55C to 125C LT3050EDDB PBF LT3050EDDB TRPBF LFGC 12-Lead (3mm 2mm) Plastic DFN 40C to 125C LT3050IDDB PBF LT3050IDDB TRPBF LFGC 12-Lead (3mm 2mm) Plastic DFN 40C to 125C LT3050EDDB-3.3 PBF LT3050EDDB-3.3 TRPBF LFWR 12-Lead (3mm 2mm) Plastic DFN 40C to 125C LT3050IDDB-3.3 PBF LT3050IDDB-3.3 TRPBF LFWR 12-Lead (3mm 2mm) Plastic DFN 40C to 125C 3050fa 2