LT3015 Series 1.5A, Low Noise, Negative Linear Regulator with Precision Current Limit FEATURES DESCRIPTION n Output Current: 1.5A The LT 3015 series are low noise, low dropout, negative n Dropout Voltage: 310mV linear regulators with fast transient response. The devices n Precision Current Limit with Foldback supply up to 1.5A of output current at a typical dropout n Low Output Noise: 60V (10Hz to 100kHz) voltage of 310mV. Operating quiescent current is typically RMS n Low Quiescent Current: 1.1mA 1.1mA and drops to < 1A in shutdown. Quiescent current n Precision Positive or Negative Shutdown Logic is also well controlled in dropout. In addition to fast tran- n Fast Transient Response sient response, the LT3015 series exhibit very low output n Wide Input Voltage Range: 1.8V to 30V noise, making them ideal for noise sensitive applications. n Adjustable Output Voltage Range: 1.22V to 29.3V The LT3015 regulators are stable with a minimum 10F n Fixed Output Voltages: 2.5V, 3V, 3.3V, 5V, 12V, 15V output capacitor. Moreover, the regulator can use small n Controlled Quiescent Current in Dropout ceramic capacitors without the necessary addition of ESR n <1A Quiescent Current in Shutdown as is common with other regulators. Internal protection n Stable with 10F Output Capacitor circuitry includes reverse output protection, precision cur- n Stable with Ceramic, Tantalum or Aluminum Capacitors rent limit with foldback and thermal limit with hysteresis. n Thermal Limit with Hysteresis n The LT3015 regulators are available in fixed output volt- Reverse Output Protection n ages of 2.5V, 3V, 3.3V, 5V, 12V and 15V and as an 5-Lead TO-220 and DD-Pak, Thermally Enhanced adjustable device with a 1.22V reference voltage. Pack- 12-Lead MSOP and 8-Lead 3mm 3mm 0.75mm ages include the 5-lead TO-220 and DD-Pak, a thermally DFN Packages enhanced 12-lead MSOP and the low profile (0.75 mm) APPLICATIONS 8-lead 3mm 3mm DFN. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and n Post-Regulator for Switching Supplies ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n Negative Logic Supplies n Low Noise Instrumentation n Industrial Supplies n Negative Complement to the LT1963A Dropout Voltage TYPICAL APPLICATION 450 T = 25C J 5V, 1.5A, Low Noise Regulator 400 350 GND 300 DD-PAK/TO-220 250 LT3015-5 10F 10F 200 SHDN SENSE DFN/MSOP 150 V V IN OUT 100 5.5V TO IN OUT 5V 30V 1.5A 50 3015 TA01 0 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 LOAD CURRENT (A) 3015 TA01a 3015fb 1 DROPOUT VOLTAGE (mV)LT3015 Series ABSOLUTE MAXIMUM RATINGS (Note 1) SHDN Pin Voltage IN Pin Voltage .........................................................33V (with Respect to GND Pin) ..............................33V, 22V OUT Pin Voltage (Note 10) ......................................33V Output Short-Circuit Duration .......................... Indefinite OUT to IN Differential Voltage (Note 10) ........0.3V, 33V Operating Junction Temperature Range (Note 9) SENSE Pin Voltage E-, I-Grade ........................................ 40C to 125C (with Respect to IN Pin) (Note 10) .................0.3V, 33V MP-Grade ......................................... 55C to 125C ADJ Pin Voltage Storage Temperature Range .................. 65C to 150C (with Respect to IN Pin) (Note 10) .................0.3V, 33V Lead Temperature (Soldering, 10Sec) SHDN Pin Voltage MS12E Package ................................................300C (with Respect to IN Pin) (Note 10) .................0.3V, 55V Q, T Packages ................................................... 250C PIN CONFIGURATION TOP VIEW TOP VIEW 1 IN 12 OUT IN 1 8 OUT 2 11 OUT IN IN OUT 2 7 13 9 IN 3 10 OUT IN IN IN 4 9 OUT SHDN 3 6 SENSE/ADJ* SHDN 5 8 SENSE/ADJ* GND 4 5 GND GND 6 7 GND MSE PACKAGE DD PACKAGE 12-LEAD PLASTIC MSOP 8-LEAD (3mm 3mm) PLASTIC DFN T = 125C, q = 37C/W, q = 10C/W JMAX JA JC T = 125C, q = 40C/W, q = 7.5C/W JMAX JA JC EXPOSED PAD (PIN 13) IS IN, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 9) IS IN, MUST BE SOLDERED TO PCB *PIN 8 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 6 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 8 = ADJ FOR LT3015 *PIN 6 = ADJ FOR LT3015 FRONT VIEW FRONT VIEW 5 OUT 5 OUT 4 SENSE/ADJ* 4 SENSE/ADJ* TAB IS IN 3 IN TAB IS IN 3 IN 2 GND 2 GND 1 SHDN 1 SHDN Q PACKAGE T PACKAGE 5-LEAD PLASTIC DD-PAK 5-LEAD PLASTIC TO-220 T = 125C, q = 14C/W, q = 3C/W T = 125C, q = 50C/W, q = 3C/W JMAX JA JC JMAX JA JC *PIN 4 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 4 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 4 = ADJ FOR LT3015 *PIN 4 = ADJ FOR LT3015 3015fb 2