LT3045-EP 20V, 500mA, Ultralow Noise, Ultrahigh PSRR Linear Regulator FEATURES APPLICATIONS n n Ultralow RMS Noise: 0.8V (10Hz to 100kHz) RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs RMS n n Ultralow Spot Noise: 2nV/Hz at 10kHz Very Low Noise Instrumentation n n Ultrahigh PSRR: 76dB at 1MHz High Speed/High Precision Data Converters n n Output Current: 500mA Medical Applications: Imaging, Diagnostics n n Wide Input Voltage Range: 1.8V to 20V Precision Power Supplies n n Single Capacitor Improves Noise and PSRR Post-Regulator for Switching Supplies n 100A SET Pin Current: 1% Initial Accuracy n Single Resistor Programs Output Voltage DESCRIPTION n High Bandwidth: 1MHz The LT 3045-EP is a high performance low dropout linear n Programmable Current Limit regulator featuring LTCs ultralow noise and ultrahigh PSRR n Low Dropout Voltage: 260mV architecture for powering noise sensitive applications. n Output Voltage Range: 0V to 15V Designed as a precision current reference followed by a n Programmable Power Good high performance voltage buffer, the LT3045-EP can be n Fast Start-Up Capability easily paralleled to further reduce noise, increase output n Precision Enable/UVLO current and spread heat on the PCB. n Parallelable for Lower Noise and Higher Current n Internal Current Limit with Foldback The device supplies 500mA at a typical 260mV dropout n Minimum Output Capacitor: 10F Ceramic voltage. Operating quiescent current is nominally 2.2mA n Reverse-Battery and Reverse-Current Protection and drops to <<1A in shutdown. The LT3045-EPs wide n 12-Lead MSOP Package output voltage range (0V to 15V) while maintaining unity- gain operation provides virtually constant output noise, PSRR, bandwidth and load regulation, independent of the programmed output voltage. Additionally, the regulator features programmable current limit, fast start-up capa- ENHANCED PRODUCT FEATURES bility and programmable power good to indicate output n Supports Defense and Aerospace Applications (AQEC voltage regulation. Standard) The LT3045-EP is stable with a minimum 10F ceramic n Military Temperature Range (55C to 150C) output capacitor. Built-in protection includes reverse- n Controlled Manufacturing Baseline battery protection, reverse-current protection, internal n One Assembly/Test Site current limit with foldback and thermal limit with hysteresis. n One Fabrication Site The LT3045-EP is available in thermally enhanced 12- n Product Change Notification Lead MSOP package. Additional application and technical n Qualification Data Available on Request information can be found in LT3045 data sheet. All registered trademarks and trademarks are the property of their respective owners. Rev. 0 1 Document Feedback For more information www.analog.comLT3045-EP ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION (Note 1) IN Pin Voltage .........................................................22V TOP VIEW EN/UV Pin Voltage ..................................................22V IN 1 12 OUT IN 2 11 OUT IN-to-EN/UV Differential..........................................22V IN 3 13 10 OUTS PG Pin Voltage (Note 10) ...............................0.3V, 22V EN/UV 4 GND 9 GND PG 5 8 SET ILIM Pin Voltage (Note 10) ...............................0.3V, 1V ILIM 6 7 PGFB PGFB Pin Voltage (Note 10) ...........................0.3V, 22V MSE PACKAGE SET Pin Voltage (Note 10) ..............................0.3V, 16V 12-LEAD PLASTIC MSOP T = 150C, = 33C/W, = 8C/W JMAX JA JC SET Pin Current (Note 7) .................................... 20mA EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB OUTS Pin Voltage (Note 10) ...........................0.3V, 16V OUTS Pin Current (Note 7) ................................. 20mA OUT Pin Voltage (Note 10) .............................0.3V, 16V OUT-to-OUTS Differential (Note 14) ....................... 1.2V IN-to-OUT Differential .............................................22V IN-to-OUTS Differential ...........................................22V Output Short-Circuit Duration .......................... Indefinite Operating Junction Temperature Range (Note 9) H-Grade, ............................................ 55C to 150C Storage Temperature Range .............. 65C to 150C Lead Temperature (Soldering, 10 Sec) MSE Package ...................................................300C ORDER INFORMATION LEAD FREE FINISH PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE LT3045HMSE Z-EP 3045EP 12-Lead Plastic MSOP 55C to 150C ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at T = 25C. A PARAMETER CONDITIONS MIN TYP MAX UNITS l Input Voltage Range 2 20 V Minimum IN Pin Voltage I = 500mA, V UVLO Rising l 1.78 2 V LOAD IN (Note 2) V UVLO Hysteresis 75 mV IN l Output Voltage Range V > V 0 15 V IN OUT SET Pin Current (I ) V = 2V, I = 1mA, V = 1.3V 99 100 101 A SET IN LOAD OUT 2V < V < 20V, 0V < V < 15V, 1mA < I < 500mA (Note 3) l 98 100 102 A IN OUT LOAD Fast Start-Up Set Pin V = 289mV, V = 2.8V, V = 1.3V 2 mA PGFB IN SET Current Output Offset Voltage V = 2V, I = 1mA, V = 1.3V 1 1 mV IN LOAD OUT V (V V ) 2V < V < 20V, 0V < V < 15V, 1mA < I < 500mA (Note 3) l 2 2 mV OS OUT SET IN OUT LOAD (Note 4) Line Regulation: I V = 2V to 20V, I = 1mA, V = 1.3V l 0.5 2 nA/V SET IN LOAD OUT Line Regulation: V V = 2V to 20V, I = 1mA, V = 1.3V (Note 4) l 0.5 3 V/V OS IN LOAD OUT Rev. 0 2 For more information www.analog.com