LT3086 40V, 2.1A Low Dropout Adjustable Linear Regulator with Monitoring and Cable Drop Compensation Fea T Descrip T n Wide Input Voltage Range: 1.4V to 40V The LT 3086 is a multi-feature, low dropout, low noise n 1 Resistor Sets Output Voltage: 0.4V to 32V 2.1A linear regulator that operates over a 1.4V to 40V n Output Current: 2.1A input supply range. Dropout voltage at 2.1A is typically n 2% Tolerance Over Line, Load and Temperature 330mV. One resistor sets output voltage from 0.4V to 32V. n Output Current Monitor: I = I /1000 Output voltage tolerance is guaranteed to 2% over line, MON OUT n Temperature Monitor with Programmable load and temperature. The LT3086 is stable with ceramic Thermal Limit output capacitors, requiring a minimum of 10F. n Programmable Cable Drop Compensation The LT3086s programmable cable drop compensation n Parallel Multiple Devices for Higher Current cancels output voltage errors caused by resistive connec- n Dropout Voltage: 330mV tions to the load. A master/slave configuration allows paral- n 1 Capacitor Soft-Starts Output and Decreases Noise leling of multiple devices for higher load current and heat n Low Output Noise: 40V (10Hz to 100kHz) RMS spreading without external ballast resistor requirements. n Precision, Programmable External Current Limit n Output current and temperature monitoring along with Power Good Flag with Programmable Threshold n a power good flag provide system diagnostic and debug Ceramic Output Capacitors: 10F Minimum n capability. Internal fault circuitry includes thermal shutdown Quiescent Current in Shutdown: <1A n and current limit with foldback. Thermal limit and current Reverse-Battery, -Current and -Output Protection n limit are also externally programmable. Available in 5mm 4mm 16-Lead DFN, 16-Lead TSSOP, 7-Lead DD-Pak and 7-Lead TO-220. Packages include the thermally enhanced 16-lead (5mm 4mm) DFN, 16-lead TSSOP, 7-lead DD-Pak and a T 7-lead TO-220. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear n Programmable Linear Regulator Technology Corporation. All other trademarks are the property of their respective owners. n Post Regulator for Switching Supplies n USB Power Supplies n High Reliability Power Supplies Typical a T Transient Response with Cable Drop Compensation (CDC) 5V, 2.1A USB Supply with Cable Drop Compensation 5.8 CABLE V = 6V IN V R 5.6 OUT LINE1 R = 357 MON IN OUT R = 0.24 5.4 WIRE V R IN SET LT3086 10F 82.5k 10F R = 46.4k CDC 6V TO 90.9k + 1.1k V WITH CDC 5.2 1% OUT 15V 1% SHDN SET 5.0 V R TEMP CDC V WITH CDC TEMP 100k LOAD 4.8 10mV/C 1% V LOAD TRACK 25C = 250mV CDC 5V AT 2.1A 4.6 R 1% V WITHOUT CDC LOAD CDC I R 4.4 PWRGD MON TO ADC 0.8V AT 2.24A I LIM PWRGD V PWRGD 4.2 R FULL-SCALE MON GND I = 0.5A TO 1.5A 2 LOAD 357 R LINE2 1% 3086 TA01 1 R R *SEE APPLICATIONS INFORMATION MON SET 0 R = CDC FOR INDUCTANCE EFFECTS ASSOCIATED 0 80 160 240 320 400 480 560 640 720 800 3000 R WIRE WITH R WIRE TIME (s) R =R +R * WIRE LINE1 LINE2 3060 TA04b 3086fa 1 For more information www.linear.com/LT3086 LOAD LOAD CURRENT (A) OUTPUT VOLTAGE (V) ion pplica ions pplica ion uresLT3086 a T e Maxi Mu M r a T (Note 1) IN Pin Voltage .........................................................45V PWRGD Pin Voltage .........................................0.3, 36V OUT Pin Voltage ......................................................36V R Pin Voltage .........................................0.3, 36V PWRGD Input-to-Output Differential Voltage (Note 2) ..........45V Output Short-Circuit Duration .......................... Indefinite SET Pin Voltage ...............................................0.3, 36V Operating Junction Temperature (Notes 3, 5, 12) SHDN Pin Voltage ...................................................45V E-Grade, I-Grade ................................ 40C to 125C CDC Pin (Internally Clamped, Current into Pin) .......<8mA MP-Grade .......................................... 55C to 125C I Pin Voltage ................................................0.3, 7V Storage Temperature Range ......................65 to 150C MON I Pin Voltage ..................................................0.3, 2V Lead Temperature (Soldering, 10 sec) LIM TRACK Pin Voltage .... 0.3, Internally Clamped at 1.25V (TSSOP, DD-Pak, TO-220 Only) ...........................300C TEMP Pin Voltage .................................................0V, 5V p c F T TOP VIEW TOP VIEW GND 1 16 GND GND 1 16 GND I 2 15 PWRGD I /I 2 15 PWRGD LIM MON LIM I 3 14 TRACK CDC 3 14 TRACK MON CDC 4 13 TEMP R 4 13 TEMP PWRGD 17 17 GND GND R 5 12 SHDN SET 5 12 SHDN PWRGD SET 6 11 IN OUT 6 11 IN OUT 7 10 IN OUT 7 10 IN OUT 8 9 NC GND 8 9 GND FE PACKAGE DHD PACKAGE 16-LEAD PLASTIC TSSOP 16-LEAD (5mm 4mm) PLASTIC DFN T = 125C, = 25C/W TO 33C/W*, = 10C/W JMAX JA JC T = 125C, = 25C/W TO 33C/W*, = 4.3C/W JMAX JA JC EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB FRONT VIEW FRONT VIEW TEMP 7 TEMP 7 SHDN 6 SHDN 6 IN TAB 5 IN TAB 5 GND IS 4 GND IS 4 OUT GND 3 OUT GND 3 SET 2 SET 2 I /I 1 I /I 1 MON LIM MON LIM R PACKAGE T7 PACKAGE 7-LEAD PLASTIC DD 7-LEAD PLASTIC TO-220 T = 125C, = 34C/W, = 3C/W T = 125C, = 15C/W TO 19C/W*, = 3C/W JMAX JA JC JMAX JA JC *See Applications Information section. 3086fa 2 For more information www.linear.com/LT3086 ion igura on in ings bsolu