LT3065 Series 45V VIN, 500mA Low Noise, Linear Regulator with Programmable Current Limit and Power Good DESCRIPTION FEATURES Input Voltage Range: 1.8V to 45V Output Current: 500mA Dropout Voltage: 300mV Programmable Precision Current Limit: ±10% Power Good Flag Low Noise: 25µVRMS (10Hz to 100kHz) Adjustable Output (VREF = VOUT(MIN) = 600mV) Output Tolerance: ±2% Over Line, Load and Temperature n Stable with Low ESR, Ceramic Output Capacitors (3.3µF Minimum) n Single Capacitor Soft-Starts Reference and Lowers Output Noise n Current Limit Foldback Protection n Shutdown Current: <1µA n Reverse Battery and Thermal Limit Protection n10-Lead 3mm × 3mm DFN and 12-lead MSOP Packages n n n n n n n The LT®3065 Series are micropower, low noise, low dropout voltage (LDO) linear regulators that operate over a 1.8V to 45V input voltage range. The devices supply 500mA of output current with a typical dropout voltage of 300mV. A single external capacitor provides programmable low noise reference performance and output soft-start functionality. n A single external resistor programs the LT3065’s current limit, accurate to ±10% over a wide input voltage and temperature range. A PWRGD flag indicates output regulation. The LT3065 optimizes stability and transient response with low ESR ceramic capacitors, requiring a minimum of 3.3µF. Internal protection circuitry includes current limiting with foldback, thermal limiting, reverse battery protection, reverse current protection and reverse output protection. The LT3065 is available in fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, and 5V, and as an adjustable device with an output voltage range from 0.6V to 40V. The LT3065 is available in the thermally-enhanced 10-lead 3mm × 3mm DFN and 12-lead MSOP packages. APPLICATIONS n n n n n Battery-Powered Systems Automotive Power Supplies Industrial Power Supplies Avionic Power Supplies Portable Instruments L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. TYPICAL APPLICATION Precision Current Limit, RIMAX = 1.5k 220 5V Supply with 200mA Precision Current Limit IN 3.3µF 500k LT3065-5 REF/BYP 1nF 3.3µF 5V OUT 200mA SENSE SHDN ADJ PWRGD 10nF OUT GND IMAX 1.5k VOUT(NOMINAL) = 5V 212 CURRENT LIMIT (mA) 5.6V TO 13V IN 216 208 204 200 VIN = 10V VIN = 5.6V 196 192 188 22nF 3065 TA01a 184 180 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 TA01b 3065fb For more information www.linear.com/LT3065 1 LT3065 Series ABSOLUTE MAXIMUM RATINGS (Note 1) IN Pin Voltage..........................................................±50V OUT Pin Voltage............................................ +40V, –50V Input-to-Output Differential Voltage (Note 2)...+50V, –40V ADJ Pin Voltage.......................................................±50V SENSE Pin Voltage...................................................±50V SHDN Pin Voltage....................................................±50V PWRGD Pin Voltage........................................–0.3V, 50V IMAX Pin Voltage...............................................–0.3V, 7V REF/BYP Pin Voltage....................................................1V Output Short-Circuit Duration........................... Indefinite Operating Junction Temperature Range (Notes 3, 5, 14) E-, I-Grades........................................ –40°C to 125°C MP-Grade........................................... –55°C to 150°C H-Grade.............................................. –40°C to 150°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) MSOP Package Only.......................................... 300°C PIN CONFIGURATION TOP VIEW TOP VIEW IN 1 10 OUT IN 2 9 OUT SHDN 3 PWRGD 4 IMAX 5 11 GND IN IN SHDN PWRGD IMAX NC 8 ADJ/SENSE* 7 GND/ADJ* 6 REF/BYP 1 2 3 4 5 6 13 GND 12 11 10 9 8 7 OUT OUT ADJ/SENSE* GND/ADJ* REF/BYP NC MSE PACKAGE 12-LEAD PLASTIC MSOP DD PACKAGE 10-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 150°C, θJA = 28°C/W, θJC = 6°C/W EXPOSED PAD (PIN 13) IS GND, MUST BE SOLDERED TO PCB TJMAX = 150°C, θJA = 31°C/W, θJC = 9°C/W EXPOSED PAD (PIN 11) IS GND, MUST BE SOLDERED TO PCB *Pin 7: GND for LT3065, ADJ for LT3065-1.2, LT3065-1.5, LT3065-1.8, LT3065-2.5, LT3065-3.3, LT3065-5 *Pin 8: ADJ for LT3065, SENSE for LT3065-1.2, LT3065-1.5, LT3065-1.8, LT3065-2.5, LT3065-3.3, LT3065-5 *Pin 9: GND for LT3065, ADJ for LT3065-1.2, LT3065-1.5, LT3065-1.8, LT3065-2.5, LT3065-3.3, LT3065-5 *Pin 10: ADJ for LT3065, SENSE for LT3065-1.2, LT3065-1.5, LT3065-1.8, LT3065-2.5, LT3065-3.3, LT3065-5 ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3065EDD#PBF LT3065EDD#TRPBF LGKS 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065IDD#PBF LT3065IDD#TRPBF LGKS 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD#PBF LT3065HDD#TRPBF LGKS 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD#PBF LT3065MPDD#TRPBF LGKS 10-Lead (3mm x 3mm) Plastic DFN –55°c to 150°C LT3065EDD-1.2#PBF LT3065EDD-1.2#TRPBF LGQV 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065IDD-1.2#PBF LT3065IDD-1.2#TRPBF LGQV 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD-1.2#PBF LT3065HDD-1.2#TRPBF LGQV 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD-1.2#PBF LT3065MPDD-1.2#TRPBF LGQV 10-Lead (3mm x 3mm) Plastic DFN –55°C to 150°C LT3065EDD-1.5#PBF LT3065EDD-1.5#TRPBF LGQW 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065IDD-1.5#PBF LT3065IDD-1.5#TRPBF LGQW 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD-1.5#PBF LT3065HDD-1.5#TRPBF LGQW 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD-1.5#PBF LT3065MPDD-1.5#TRPBF LGQW 10-Lead (3mm x 3mm) Plastic DFN –55°C to 150°C LT3065EDD-1.8#PBF LT3065EDD-1.8#TRPBF LGQX 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065IDD-1.8#PBF LT3065IDD-1.8#TRPBF LGQX 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD-1.8#PBF LT3065HDD-1.8#TRPBF LGQX 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD-1.8#PBF LT3065MPDD-1.8#TRPBF LGQX 10-Lead (3mm x 3mm) Plastic DFN –55°C to 150°C LT3065EDD-2.5#PBF LT3065EDD-2.5#TRPBF LGQY 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C 3065fb 2 For more information www.linear.com/LT3065 LT3065 Series ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3065IDD-2.5#PBF LT3065IDD-2.5#TRPBF LGQY 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD-2.5#PBF LT3065HDD-2.5#TRPBF LGQY 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD-2.5#PBF LT3065MPDD-2.5#TRPBF LGQY 10-Lead (3mm x 3mm) Plastic DFN –55°C to 150°C LT3065EDD-3.3#PBF LT3065EDD-3.3#TRPBF LGQZ 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065IDD-3.3#PBF LT3065IDD-3.3#TRPBF LGQZ 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD-3.3#PBF LT3065HDD-3.3#TRPBF LGQZ 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD-3.3#PBF LT3065MPDD-3.3#TRPBF LGQZ 10-Lead (3mm x 3mm) Plastic DFN –55°C to 150°C LT3065EDD-5#PBF LT3065EDD-5#TRPBF LGRB 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065IDD-5#PBF LT3065IDD-5#TRPBF LGRB 10-Lead (3mm x 3mm) Plastic DFN –40°C to 125°C LT3065HDD-5#PBF LT3065HDD-5#TRPBF LGRB 10-Lead (3mm x 3mm) Plastic DFN –40°C to 150°C LT3065MPDD-5#PBF LT3065MPDD-5#TRPBF LGRB 10-Lead (3mm x 3mm) Plastic DFN –55°C to 150°C LT3065EMSE#PBF LT3065EMSE#TRPBF 3065 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE#PBF LT3065IMSE#TRPBF 3065 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE#PBF LT3065HMSE#TRPBF 3065 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE#PBF LT3065MPMSE#TRPBF 3065 12-Lead Plastic MSOP –55°C to 150°C LT3065EMSE-1.2#PBF LT3065EMSE-1.2#TRPBF 306512 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE-1.2#PBF LT3065IMSE-1.2#TRPBF 306512 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE-1.2#PBF LT3065HMSE-1.2#TRPBF 306512 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE-1.2#PBF LT3065MPMSE-1.2#TRPBF 306512 12-Lead Plastic MSOP –55°C to 150°C LT3065EMSE-1.5#PBF LT3065EMSE-1.5#TRPBF 306515 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE-1.5#PBF LT3065IMSE-1.5#TRPBF 306515 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE-1.5#PBF LT3065HMSE-1.5#TRPBF 306515 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE-1.5#PBF LT3065MPMSE-1.5#TRPBF 306515 12-Lead Plastic MSOP –55°C to 150°C LT3065EMSE-1.8#PBF LT3065EMSE-1.8#TRPBF 306518 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE-1.8#PBF LT3065IMSE-1.8#TRPBF 306518 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE-1.8#PBF LT3065HMSE-1.8#TRPBF 306518 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE-1.8#PBF LT3065MPMSE-1.8#TRPBF 306518 12-Lead Plastic MSOP –55°C to 150°C LT3065EMSE-2.5#PBF LT3065EMSE-2.5#TRPBF 306525 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE-2.5#PBF LT3065IMSE-2.5#TRPBF 306525 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE-2.5#PBF LT3065HMSE-2.5#TRPBF 306525 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE-2.5#PBF LT3065MPMSE-2.5#TRPBF 306525 12-Lead Plastic MSOP –55°C to 150°C LT3065EMSE-3.3#PBF LT3065EMSE-3.3#TRPBF 306533 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE-3.3#PBF LT3065IMSE-3.3#TRPBF 306533 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE-3.3#PBF LT3065HMSE-3.3#TRPBF 306533 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE-3.3#PBF LT3065MPMSE-3.3#TRPBF 306533 12-Lead Plastic MSOP –55°C to 150°C LT3065EMSE-5#PBF LT3065EMSE-5#TRPBF 30655 12-Lead Plastic MSOP –40°C to 125°C LT3065IMSE-5#PBF LT3065IMSE-5#TRPBF 30655 12-Lead Plastic MSOP –40°C to 125°C LT3065HMSE-5#PBF LT3065HMSE-5#TRPBF 30655 12-Lead Plastic MSOP –40°C to 150°C LT3065MPMSE-5#PBF LT3065MPMSE-5#TRPBF 30655 12-Lead Plastic MSOP –55°C to 150°C Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.Consult LTC Marketing for information on nonstandard lead based finish parts. For more information on lead free part marking, go to: http://www.linear.com/leadfree/ For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/ 3065fb For more information www.linear.com/LT3065 3 LT3065 Series ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C (Note 3). PARAMETER CONDITIONS MIN TYP Minimum Input Voltage (Notes 4, 9) ILOAD = 500mA Regulated Output Voltage LT3065-1.2: VIN = 2.2V, ILOAD = 1mA 2.2V < VIN < 45V, 1mA < ILOAD < 500mA LT3065-1.5: VIN = 2.2V, ILOAD = 1mA 2.2V < VIN < 45V, 1mA < ILOAD < 500mA LT3065-1.8: VIN = 2.4V, ILOAD = 1mA 2.4V < VIN < 45V, 1mA < ILOAD < 500mA LT3065-2.5: VIN = 3.1V, ILOAD = 1mA 3.1V < VIN < 45V, 1mA < ILOAD < 500mA LT3065-3.3: VIN = 3.9V, ILOAD = 1mA 3.9V < VIN < 45V, 1mA < ILOAD < 500mA LT3065-5: VIN = 5.6V, ILOAD = 1mA 5.6V < VIN < 45V, 1mA < ILOAD < 500mA 1.8 2.2 V 1.2 l 1.188 1.176 1.485 1.470 1.782 1.764 2.475 2.450 3.267 3.234 4.950 4.900 1.212 1.224 1.515 1.530 1.818 1.836 2.525 2.550 3.333 3.366 5.050 5.100 V V V V V V V V V V V V LT3065: VIN = 2.2V, ILOAD = 1mA 2.2V < VIN < 45V, 1mA < ILOAD < 500mA 594 588 600 l 606 612 mV mV Line Regulation ILOAD = 1mA LT3065-1.2: ΔVIN = 2.2V to 45V LT3065-1.5: ΔVIN = 2.2V to 45V LT3065-1.8: ΔVIN = 2.4V to 45V LT3065-2.5: ΔVIN = 3.1V to 45V LT3065-3.3: ΔVIN = 3.9V to 45V LT3065-5: ΔVIN = 5.6V to 45V LT3065: ΔVIN = 2.2V to 45V (Note 4) l l l l l l l 0.7 0.9 1.1 1.6 2.0 3.1 0.1 7 8.8 10.5 14.6 19.3 29.2 3 mV mV mV mV mV mV mV Load Regulation ∆ILOAD = 1mA to 500mA LT3065-1.2, VIN = 2.2V LT3065-1.5, VIN = 2.2V LT3065-1.8, VIN = 2.4V LT3065-2.5 VIN = 3.1V LT3065-3.3, VIN = 3.9V LT3065-5, VIN = 5.6V LT3065, VIN = 2.2V (Note 4) l l l l l l l 0.5 0.7 0.9 1.2 1.6 2.4 0.1 8 10 12 16.7 11 33.4 4 mV mV mV mV mV mV mV 110 150 210 mV mV 145 200 310 mV mV 175 220 330 mV mV 300 350 510 mV mV 55 100 270 1.8 11 110 200 550 4.5 25 µA µA µA mA mA 0.2 1 µA 16 60 nA ADJ Pin Voltage (Notes 4, 5) l Dropout Voltage, VIN = VOUT(NOMINAL) ILOAD = 10mA (Notes 6, 7) l l l l l 1.5 1.8 2.5 3.3 5 l ILOAD = 50mA l ILOAD = 100mA l ILOAD = 500mA l GND Pin Current, VIN = VOUT(NOMINAL) + 0.6V (Notes 7, 8) ILOAD = 0mA ILOAD = 1mA ILOAD = 10mA ILOAD = 100mA ILOAD = 500mA l l l l l MAX UNITS Quiescent Current in Shutdown VIN = 45V, VSHDN = 0V ADJ Pin Bias Current (Notes 4, 10) VIN = 2.2V Output Voltage Noise COUT = 10µF, ILOAD = 500mA, VOUT = 600mV, BW = 10Hz to 100kHz 90 µVRMS COUT = 10µF, CBYP = 10nF, ILOAD = 500mA, VOUT = 600mV, BW = 10Hz to 100kHz 25 µVRMS Shutdown Threshold l VOUT = Off to On VOUT = On to Off l l 0.9 1. 3 1.1 1.42 V V 3065fb 4 For more information www.linear.com/LT3065 LT3065 Series ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C (Note 3). SHDN Pin Current (Note 11) VSHDN = 0V, VIN = 45V VSHDN = 45V, VIN = 45V Ripple Rejection VIN – VOUT = 2V, VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 500mA LT3065-1.2 LT3065-1.5 LT3065-1.8 LT3065-2.5 LT3065-3.3 LT3065-5 LT3065 Input Reverse Leakage Current VIN = –45V, VOUT = 0 Reverse Output Current (Note 12) VOUT = 1.2V, VIN = VSHDN = 0 Internal Current Limit (Note 4) VIN = 2.2V, VOUT = 0, VIMAX = 0 VIN = 2.2V, ∆VOUT = –5% l 520 External Programmed Current Limit (Notes 7, 13) 5.6V < VIN < 10V, VOUT = 95% of VOUT (Nominal), RIMAX = 1.5k 5.6V < VIN < 7V, VOUT = 95% of VOUT (Nominal), RIMAX = 604Ω l l 180 445 PWRGD Logic Low Voltage Pull-Up Current = 50µA l PWRGD Leakage Current VPWRGD = 45V l l 0.5 63 63 59 57 56 55 70 PWRGD Trip Point % of Nominal Output Voltage, Output Rising % of Nominal Output Voltage Note 1: Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: Absolute maximum input-to-output differential voltage is not achievable with all combinations of rated IN pin and OUT pin voltages. With IN at 50V, do not pull OUT below 0V. The total differential voltage from IN to OUT must not exceed +50V, –40V. If OUT is pulled above IN and GND, the OUT to IN differential voltage must not exceed 40V. Note 3: The LT3065 regulator is tested and specified under pulse load conditions such that TJ ≅ TA. The LT3065E regulators are 100% tested at TA = 25°C and performance is guaranteed from 0°C to 125°C. Performance at –40°C to 125°C is assured by design, characterization and correlation with statistical process controls. The LT3065I regulators are guaranteed over the full –40°C to 125°C operating junction temperature range. The LT3065MP regulators are 100% tested over the –55°C to 150°C operating junction temperature range. The LT3065H regulators are 100% tested at the 150°C operating junction temperature. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperatures greater than 125°C. Note 4: The LT3065 adjustable version is tested and specified for these conditions with the ADJ pin connected to the OUT pin. Note 5: Maximum junction temperature limits operating conditions. Regulated output voltage specifications do not apply for all possible combinations of input voltage and output current. If operating at the maximum input voltage, limit the output current range. If operating at the maximum output current, limit the input voltage range. Current limit foldback limits the maximum output current as a function of input-tooutput voltage. See Current Limit vs VIN – VOUT in the Typical Performance Characteristics section. 300 0 l 86 µA µA dB dB dB dB dB dB dB 78 78 74 72 71 70 85 l PWRGD Trip Point Hysteresis ±1 3 10 900 µA µA mA mA 200 495 220 545 mA mA 0.07 0.25 V 0.01 1 µA 90 94 % 1.6 % Note 6: Dropout voltage is the minimum IN-to-OUT differential voltage needed to maintain regulation at a specified output current. In dropout, the output voltage equals (VIN – VDROPOUT). For some output voltages, minimum input voltage requirements limit dropout voltage. Note 7: To satisfy minimum input voltage requirements, the LT3065 is tested and specified for these conditions with an external resistor divider (60.4k bottom, 442k top) which sets VOUT to 5V. The divider adds 10uA of output DC load. This external current is not factored into GND pin current. Note 8: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.6V and a current source load. GND pin current increases in dropout. See GND pin current curves in the Typical Performance Characteristics section. Note 9: To satisfy requirements for minimum input voltage, current limit is tested at VIN = VOUT(NOMINAL) + 1V or VIN = 2.2V, whichever is greater. Note 10: ADJ pin bias current flows out of the ADJ pin. Note 11: SHDN pin current flows into the SHDN pin. Note 12: Reverse output current is tested with the IN pin grounded and the OUT pin forced to the specified voltage. This current flows into the OUT pin and out of the GND pin. Note 13: Current limit varies inversely with the external resistor value tied from the IMAX pin to GND. For detailed information on selecting the IMAX resistor value, see the Operation section. If the externally programmed current limit feature is unused, tie the IMAX pin to GND. The internal current limit circuitry implements short-circuit protection as specified. Note 14: This IC includes over temperature protection that protects the device during overload conditions. Junction temperature exceeds 125°C (LT3065E, LT3065I) or 150°C (LT3065MP, LT3065H) when the over temperature circuitry is active. Continuous operation above the specified maximum junction temperature may impair device reliability. 3065fb For more information www.linear.com/LT3065 5 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS Guaranteed Dropout Voltage 600 550 450 TJ = 150°C TJ = 125°C 300 250 200 TJ = 25°C 150 100 50 0 0 50 100 150 200 250 300 350 400 450 500 OUTPUT CURRENT (mA) = TEST POINTS 550 500 TJ = 150°C TJ = 25°C 1.224 1.220 0 200 LT3065-1.5 Output Voltage 1.530 IL = 1mA 1.525 1.520 1.515 1.208 1.204 1.200 1.196 1.192 1.188 1.505 1.500 1.495 1.490 1.485 1.184 1.480 1.180 1.475 1.176 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 1.470 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G05 IL = 1mA 2.54 1.824 3065 G06 LT3065-3.3 Output Voltage 3.366 IL = 1mA 3.355 OUTPUT VOLTAGE (V) 1.788 1.782 2.52 2.51 2.50 2.49 2.48 2.47 1.776 IL = 1mA 3.344 2.53 1.794 IL = 1mA 1.510 LT3065-2.5 Output Voltage 1.800 IL = 10mA 3065 G03 1.212 2.55 1.806 IL = 100mA 150 1.216 LT3065-1.8 Output Voltage 1.812 IL = 50mA 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 50 100 150 200 250 300 350 400 450 500 OUTPUT CURRENT (mA) OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) QUIESCENT CURRENT (µA) 250 LT3065-1.2 Output Voltage 1.818 IL = 500mA 300 50 3065 G04 OUTPUT VOLTAGE (V) 400 350 3065 G02 Quiescent Current 130 VIN = VSHDN = 12V 120 VOUT = 5V 110 I = 10µA L 100 90 80 70 60 50 40 30 20 VIN = 12V 10 ALL OTHER PINS = 0V 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 1.830 450 100 3065 G01 1.836 Dropout Voltage 600 OUTPUT VOLTAGE (V) 400 350 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 500 700 650 600 550 500 450 400 350 300 250 200 150 100 50 0 DROPOUT VOLTAGE (mV) Typical Dropout Voltage TJ = 25°C, unless otherwise noted. 3.333 3.322 3.311 3.300 3.289 3.278 3.267 3.256 1.770 2.46 3.245 1.764 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 2.45 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3.234 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G07 3065 G08 3065 G09 3065fb 6 For more information www.linear.com/LT3065 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS LT3065-5 Output Voltage 5.10 ADJ Pin Voltage 612 IL = 1mA 5.08 LT3065-1.2 Quiescent Current 200 IL = 1mA 610 5.02 5.00 4.98 4.96 4.94 QUIESCENT CURRENT (µA) ADJ PIN VOLTAGE (mV) 5.04 606 604 602 600 598 596 594 592 590 4.90 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 588 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G10 VSHDN = VIN 50 25 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 125 100 VSHDN = VIN 75 50 0 9 10 11 VSHDN = VIN 75 50 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 0 VSHDN = 0V 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 3065 G16 TJ = 25°C RL = 500k VOUT = 2.5V 100 VSHDN = VIN 75 50 VSHDN = 0V 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 3065 G15 Quiescent Current TJ = 25°C RL = 1M VOUT = 5V 150 125 100 VSHDN = VIN 75 50 25 25 9 10 11 125 0 QUIESCENT CURRENT (µA) QUIESCENT CURRENT (µA) QUIESCENT CURRENT (µA) 100 4 5 6 7 8 INPUT VOLTAGE (V) 25 175 125 3 150 LT3065-5 Quiescent Current 150 2 3065 G12 VSHDN = 0V 200 TJ = 25°C RL = 660k VOUT = 3.3V 1 3065 G14 LT3065-3.3 Quiescent Current 175 0 175 3065 G13 200 VSHDN = 0V LT3065-2.5 Quiescent Current 150 25 VSHDN = 0V 0 50 0 QUIESCENT CURRENT (µA) 125 VSHDN = VIN 75 200 TJ = 25°C RL = 360k VOUT = 1.8V 175 QUIESCENT CURRENT (µA) QUIESCENT CURRENT (µA) 200 150 75 100 LT3065-1.8 Quiescent Current TJ = 25°C RL = 300k VOUT = 1.5V 100 125 3065 G11 LT3065-1.5 Quiescent Current 175 150 25 4.92 200 TJ = 25°C RL = 240k VOUT = 1.2V 175 608 5.06 OUTPUT VOLTAGE (V) TJ = 25°C, unless otherwise noted. 0 VSHDN = 0V 0 1 2 3 4 5 6 7 8 INPUT VOLTAGE (V) 9 10 11 3065 G17 130 120 110 100 90 80 70 60 50 40 30 20 10 0 TJ = 25°C VOUT = 5V IL = 10µA VSHDN = VIN VSHDN = 0V 0 5 10 15 20 25 VIN (V) 30 35 40 45 3065 G18 3065fb For more information www.linear.com/LT3065 7 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C *FOR VOUT = 1.2V VSHDN = VIN 20 18 RL = 2.4Ω IL = 500mA* 16 14 20 RL = 12Ω IL = 100mA* RL = 4.8Ω IL = 250mA* 12 10 RL = 120Ω IL = 10mA* 8 6 18 RL = 3Ω IL = 500mA* 16 14 20 RL = 15Ω IL = 100mA* RL = 6Ω IL = 250mA* 12 10 RL = 150Ω IL = 10mA* 8 6 14 10 6 4 2 0 0 4 5 6 7 8 9 10 11 12 INPUT VOLTAGE (V) 0 1 2 3 RL = 5Ω IL = 500mA* 16 14 RL = 25Ω IL = 100mA* 12 10 RL = 10Ω IL = 250mA* 8 6 4 RL = 250Ω IL = 10mA* 20 18 16 14 RL = 33Ω IL = 100mA* 12 10 RL = 13.2Ω IL = 250mA* 8 6 RL = 330Ω IL = 10mA* 20 14 10 6 2 0 0 1 2 3 3065 G22 14 12 10 8 6 4 2 0 0 50 100 150 200 250 300 350 400 450 500 ILOAD (mA) 3065 G25 2 3 4 5 6 7 8 9 10 11 12 INPUT VOLTAGE (V) SHDN Pin Current 1.5 1.4 OFF TO ON 1.3 1.2 1.1 ON TO OFF 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G26 3.0 SHDN = 45V 2.5 SHDN PIN CURRENT (µA) SHDN PIN THRESHOLD (V) 16 1 3065 G24 SHDN Pin Threshold VIN = 5.6V VOUT = 5V 18 0 3065 G23 GND Pin Current vs ILOAD 20 0 4 5 6 7 8 9 10 11 12 INPUT VOLTAGE (V) RL = 500Ω IL = 10mA* 8 0 4 5 6 7 8 9 10 11 12 INPUT VOLTAGE (V) RL = 50Ω IL = 100mA* 12 4 3 TJ = 25°C *FOR VOUT = 5V VSHDN = VIN RL = 20Ω IL = 250mA* 16 2 2 4 5 6 7 8 9 10 11 12 INPUT VOLTAGE (V) 18 4 1 3 RL = 10Ω IL = 500mA* 22 2 0 2 LT3065-5 GND Pin Current 24 TJ = 25°C RL = 6.6Ω IL = 500mA* *FOR VOUT = 3.3V VSHDN = VIN 22 GND PIN CURRENT (mA) 18 1 3065 G21 LT3065-3.3 GND Pin Current 24 TJ = 25°C *FOR VOUT = 2.5V VSHDN = VIN 20 0 RL = 180Ω IL = 10mA* 3065 G20 LT3065-2.5 GND Pin Current 22 0 4 5 6 7 8 9 10 11 12 INPUT VOLTAGE (V) GND PIN CURRENT (mA) 3 RL = 7.2Ω IL = 250mA* 8 2 2 RL = 18Ω IL = 100mA* 12 4 1 RL = 3.6Ω IL = 100mA* 16 2 24 GND PIN CURRENT (mA) 18 4 0 TJ = 25°C *FOR VOUT = 1.8V VSHDN = VIN 22 3065 G19 GND PIN CURRENT (mA) LT3065-1.8 GND Pin Current 24 TJ = 25°C *FOR VOUT = 1.5V VSHDN = VIN 22 GND PIN CURRENT (mA) 22 GND PIN CURRENT (mA) LT3065-1.5 GND Pin Current 24 GND PIN CURRENT (mA) LT3065-1.2 GND Pin Current 24 2.0 1.5 1.0 0.5 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G27 3065fb 8 For more information www.linear.com/LT3065 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS ADJ Pin Bias Current SHDN Pin Input Current Internal Current Limit 50 3.0 45 2.5 40 2.0 1.5 1.0 35 CURRENT LIMIT (A) ADJ PIN CURRENT (nA) SHDN PIN CURRENT (µA) TJ = 25°C, unless otherwise noted. 30 25 20 15 10 0.5 5 0 0 5 10 15 20 25 30 35 SHDN PIN VOLTAGE (V) 40 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 45 3065 G29 3065 G28 Internal Current Limit 1.2 125°C 1.1 1.0 160 –40°C –55°C 0.6 0.5 0.4 25°C 0.3 0.2 0.1 0 0 5 10 15 20 25 30 VIN – VOUT (V) 35 40 OUTPUT CURRENT (µA) OUTPUT CURRENT (µA) CURRENT LIMIT (A) VIN = 0 0.9 150°C Reverse Output Current 180 0.8 0.7 0.7 0.6 0.5 0.4 0.3 5 10 15 20 25 VOUT (V) 30 35 50 CREF/BYP = 0nF CREF/BYP = 100nF ILOAD = 500mA COUT = 10µF VOUT = 3.3V VIN = 4.3V + 50mVRMS RIPPLE 20 10 10 100 1k 10k 100k FREQUENCY (Hz) 10M 3065 G34 80 70 70 60 60 50 50 40 30 0 40 30 ILOAD = 500mA CREF/BYP = 10nF VOUT = 3.3V VIN = 4.3V + 50mVRMS RIPPLE 20 10 1M Input Ripple Rejection 90 PSRR RIPPLE REJECTION (dB) RIPPLE REJECTION (dB) CREF/BYP = 1nF 40 3065 G33 COUT = 10µF COUT = 3.3µF 80 60 IADJ 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 40 Input Ripple Rejection 90 CREF/BYP = 10nF 30 60 20 0 IOUT 80 0.1 Input Ripple Rejection 70 100 3065 G32 90 80 120 40 0 45 VOUT = VADJ = 1.2V VIN = 0V 140 0.2 3065 G31 0 3065 G30 Reverse Output Current 1.0 0.9 0.8 1.5 1.4 VIN = 6V 1.3 VOUT = 0V 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 10 100 1k 10k 100k FREQUENCY (Hz) 20 10 1M 10M 3065 G35 ILOAD = 500mA CREF/BYP = 10nF VOUT = 3.3V VIN = 4.3V + 50mVRMS RIPPLE f = 120Hz 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G36 3065fb For more information www.linear.com/LT3065 9 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS 4 IL = 500mA 2.0 3 1.8 2 LOAD REGULATION (mV) MINIMUM INPUT VOLTAGE (V) ∆IL = 1mA TO 500mA VOUT = 0.6V VIN = 2.2V 1.6 1.4 1.2 1.0 0.8 0.6 1 0 –1 –2 0.4 –3 0.2 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) –4 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) COUT = 10µF IL = 500mA VOUT = 5V 1 VOUT = 0.6V 0.1 0.01 CREF/BYP = 100pF CREF/BYP = 1nF CREF/BYP = 10nF 10 100 1k 10k FREQUENCY (Hz) 100k 10 VOUT = 5V COUT = 10µF IL = 500mA 0.1 0.01 CFF = 0pF CFF = 100pF CFF = 1nF CFF = 10nF 10 20 0 0.01 VOUT = 0.6V 0.1 1 10 100 LOAD CURRENT (mA) 1000 3065 G43 100 1k 10k FREQUENCY (Hz) 100 1k 10k FREQUENCY (Hz) VOUT = 5V 100 VOUT = 3.3V 90 80 110 f = 10Hz TO 100kHz 100 C OUT = 10µF 90 CREF/BYP = 0pF 80 70 CREF/BYP = 100pF 60 50 40 CREF/BYP = 1nF 30 20 CREF/BYP = 10nF 0 0.01 100k 0.1 1 10 100 LOAD CURRENT (mA) f = 10Hz TO 100kHz CREF/BYP = 10nF COUT = 10µF IFB-DIVIDER = 10µA ILOAD = 500mA 60 50 40 30 VOUT = 1.2V 20 10 1000 3065 G42 Start-Up Time vs REF/BYP Capacitor VOUT = 2.5V 70 100k 3065 G39 10 RMS Output Noise, vs Feedforward Capacitor (CFF) 110 OUTPUT NOISE VOLTAGE (µVRMS) OUTPUT VOLTAGE NOISE (µVRMS) 120 VOUT = 1.2V 40 10 3065 G41 200 60 0.01 VOUT = 5V VOUT = 3.3V VOUT = 2.5V VOUT = 1.2V VOUT = 0.6V RMS Output Noise, VOUT = 0.6V, CFF = 0 1 RMS Output Noise vs Load Current vs CREF/BYP = 10nF, CFF = 0 80 0.1 Output Noise Spectral Density vs CFF, CREF/BYP = 10nF 3065 G40 VOUT = 5V f = 10Hz TO 100kHz 180 COUT = 10µF VOUT = 3.3V 160 VOUT = 2.5V 140 VOUT = 1.8V 120 VOUT = 1.5V 100 1 OUTPUT NOISE VOLTAGE (µVRMS) Output Noise Spectral Density vs CREF/BYP, CFF = 0 10 COUT = 10µF IL = 500mA 3065 G38 OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz) OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz) 3065 G37 10 1000 START-UP TIME (ms) 2.2 Output Noise Spectral Density CREF/BYP = 0, CFF = 0 Load Regulation OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz) Minimum Input Voltage TJ = 25°C, unless otherwise noted. CFF = OPEN 100 10 1 VOUT = 0.6V 0 0.01 0.1 1 FEEDFORWARD CAPACITOR, CFF (nF) 10 3065 G44 0.1 1 100 10 REF/BYP CAPACITOR (nF) 1000 3065 G45 3065fb 10 For more information www.linear.com/LT3065 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, unless otherwise noted. 10Hz to 100kHz Output Noise CREF/BYP = 10nF, CFF = 10nF 10Hz to 100kHz Output Noise CREF/BYP = 10nF, CFF = 0 VOUT 200µV/DIV 5V Transient Response CFF = 0, IOUT = 50mA to 500mA VOUT 100mV/DIV VOUT 200µV/DIV IOUT 500mA/DIV COUT = 10µF ILOAD = 500mA VOUT = 5V 2ms/DIV 3065 G46 COUT = 10µF ILOAD = 500mA VOUT = 5V 3065 G47 2ms/DIV 5V Transient Response CFF = 10nF, IOUT = 50mA to 500mA VIN = 6V 100µs/DIV COUT = 10µF IFB-DIVIDER = 10µA VOUT = 5V 3065 G48 Transient Response (Load Dump) VOUT 20mV/DIV 45V VOUT 100mV/DIV VIN 10V/DIV 12V IOUT 500mA/DIV VOUT = 5V IOUT = 100mA COUT = 10µF 3065 G49 VIN = 6V 20µs/DIV COUT = 10µF IFB-DIVIDER = 10µA VOUT = 5V 1ms/DIV 3065 G50 SHDN Transient Response CREF/BYP = 10nF SHDN Transient Response CREF/BYP = 0 OUT 5V/DIV IL = 500mA OUT 5V/DIV IL = 500mA REF/BYP 500mV/DIV REF/BYP 500mV/DIV SHDN 2V/DIV SHDN 2V/DIV 2ms/DIV 3065 G51 2ms/DIV 3065 G52 3065fb For more information www.linear.com/LT3065 11 LT3065 Series TYPICAL PERFORMANCE CHARACTERISTICS 216 550 VOUT(NOMINAL) = 5V 540 208 204 PWRGD Threshold Voltage 590 VOUT(NOMINAL) = 5V 580 530 CURRENT LIMIT (mA) CURRENT LIMIT (mA) 212 Precision Current Limit, RIMAX = 604Ω VIN = 10V 200 VIN = 5.6V 196 192 520 570 ADJ PIN VOLTAGE (mV) 220 Precision Current Limit, RIMAX = 1.5k TJ = 25°C, unless otherwise noted. 5.6V 510 500 490 10V 7V 480 560 550 ADJ PIN RISING THRESHOLD 540 530 520 ADJ PIN FALLING THRESHOLD 188 470 510 184 460 500 180 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 450 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 490 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3065 G53 PIN FUNCTIONS 3065 G54 3065 G55 (DFN/MSOP) IN (Pins 1, 2/Pins 1, 2): Input. These pin(s) supply power to the device. The LT3065 requires a local IN bypass capacitor if it is located more than six inches from the main input filter capacitor. In general, battery output impedance rises with frequency, so adding a bypass capacitor in batterypowered circuits is advisable. An input bypass capacitor in the range of 1µF to 10µF generally suffices. See Input Capacitance and Stability in the Applications Information section for more information. The LT3065 withstands reverse voltages on the IN pin with respect to its GND and OUT pins. In such case, such as a battery plugged in backwards, the LT3065 behaves as if a diode is in series with its input. No reverse current flows into the LT3065 and no reverse voltage appears at the load. The device protects itself and the load. SHDN (Pin 3/Pin 3): Shutdown. Pulling the SHDN pin low puts the LT3065 into a low power state and turns the output off. Drive the SHDN pin with either logic or an open collector/drain with a pull-up resistor. The resistor supplies the pull-up current to the open collector/drain logic, normally several microamperes, and the SHDN pin current, typically less than 2µA. If unused, connect the SHDN pin to IN. The LT3065 does not function if the SHDN pin is not connected. PWRGD (Pin 4/Pin 4): Power Good. The PWRGD pin is an open-drain output that actively pulls low if the output is less than 90% of the nominal output value. The PWRGD pin is capable of sinking 50µA. There is no internal pull-up resistor; an external pull-up resistor must be used. IMAX (Pin 5/Pin 5): Precision Current Limit Programming. This pin is the collector of a current mirror PNP that is 1/500th the size of the output power PNP. This pin is also the input to the current limit amplifier. The current limit threshold is set by connecting a resistor between the IMAX pin and GND. For detailed information on how to set the IMAX pin resistor value, see the Applications Information section. The IMAX pin requires a 22nF de-coupling capacitor to ground. If not used, tie IMAX to GND. NC (Pins 6, 7, MSE Package Only): No Connect. These pins have no connection to internal circuitry. These pins may be floated or connected to GND. REF/BYP (Pin 6/Pin 8): Bypass/Soft Start. Connecting a capacitor from this pin to GND bypasses the LT3065’s reference noise and soft-starts the reference. A 10nF bypass capacitor typically reduces output voltage noise to 25µVRMS in a 10Hz to 100kHz bandwidth. Soft-start time is directly 3065fb 12 For more information www.linear.com/LT3065 LT3065 Series PIN FUNCTIONS (DFN/MSOP) proportional to the BYP capacitor value. If the LT3065 is placed in shutdown, BYP is actively pulled low by an internal device to reset soft-start. If low noise or soft-start performance is not required, this pin must be left floating (unconnected). Do not drive this pin with any active circuitry. Because the REF/BYP pin is the reference input to the error amplifier, stray capacitance at this point should be minimized. Special attention should be given to any stray capacitances that can couple external signals onto the REF/BYP pin producing undesirable output transients or ripple. A minimum capacitance of 100pF from REF/BYP to GND is recommended. OUTPUT (Pins 9,10/Pins 11,12): Output. These pins supply power to the load. Stability requirements demand a minimum 3.3µF ceramic output capacitor with an ESR < 1Ω to prevent oscillations. Applications with output voltages less than 1.2V require a minimum 4.7µF ceramic output capacitor. Large load transient applications require larger output capacitors to limit peak voltage transients. See the Applications Information section for details on transient response and reverse output characteristics. Permissible output voltage range is 600mV to 40V. Adjustable Version Only GND (Pin 7, Exposed Pad Pin 11/Pin 9, Exposed Pad Pin 13): Ground. The exposed pad of the DFN and MSOP packages is an electrical connection to GND. To ensure proper electrical and thermal performance, solder Pin 11/Pin 13 to the PCB GND and tie it directly to Pin 7/Pin 9. For the adjustable LT3065, connect the bottom of the external resistor divider that sets output voltage directly to GND (Pin 7/Pin 9)for optimum load regulation. ADJ (Pin 8/Pin 10): Adjust. This pin is the error amplifier’s inverting terminal. It’s typical bias current of 16nA flows out of the pin (see curve of ADJ Pin Bias Current vs Temperature in the Typical Performance Characteristics section). The ADJ pin voltage is 600mV referenced to GND. Connecting a capacitor from OUT to ADJ reduces output noise and improves transient response for output voltages greater than 600mV. See the Applications Information section for calculating the value of the feedforward capacitor. At output voltages above 0.6V, the resistor divider connected to the ADJ pin is used to regulate voltage at the load. Parasitic resistances of PCB traces or cables can therefore result in load regulation errors at high output currents. To eliminate these, connect the resistor divider directly to the load for a Kelvin sense connection, as shown in Figure 1. Fixed Voltage Version Only GND (Exposed Pad Pin 11, Exposed Pad Pin 13): Ground. The exposed pad of the DFN and MSOP packages is an electrical connection to GND. To ensure proper electrical and thermal performance, solder Pin 11/Pin 13 to the PCB ground. SENSE (Pin 8/Pin 10): Sense. This pin is the top of the internal resistor divider network, and should be connected directly to the load, as a Kelvin sense, for optimum load regulation and transient performance. Connecting this pin to the output pin at the package, rather than directly to the load, can result in load regulation errors due to the current across the parasitic resistance of the PCB trace. ADJ (Pin 7/Pin 9): Adjust. This pin is the midpoint of the internal resistor divider network and the inverting input to the error amplifier. Connecting a capacitor from the OUT to ADJ reduces output noise and improves transient response. See the Applications Information section for calculating the value of the feedforward capacitor; the internal divider current is 5µA. This pin should not be used for any other purpose. 3065fb For more information www.linear.com/LT3065 13 LT3065 Series PIN FUNCTIONS ADJUSTABLE VERSION IN OUT VIN + IN R2 LT3065 + FIXED VOLTAGE VERSION RP + LOAD R1 GND RP LT3065-X ADJ SHDN OUT VIN + SENSE SHDN LOAD GND RP RP 3065 F01 Figure 1. Kelvin Sense Connection BLOCK DIAGRAM Table 2. Fixed Voltage Option Resistor Values VOUT (V) R1 (kΩ) R2 (kΩ) 5 120 880 3.3 120 540 2.5 120 380 1.8 120 240 1.5 120 180 1.2 120 120 IN SENSE* R5 ADJ QIMAX 1/500X D1 R2* 30k R4 – + Q2 SHDN Q3 100k R3 + – D2 + – QPOWER 1X OUT CURRENT LIMIT AMPLIFIER ERROR AMPLIFIER R1* IDEAL DIODE D3 THERMAL/ CURRENT LIMIT IMAX 600mV REFERENCE PWRGD – + + – REF/BYP QPWRGD 540mV REFERENCE GND 3065 F02 *FIXED VOLTAGE OPTIONS ONLY Figure 2. System Block Diagram 3065fb 14 For more information www.linear.com/LT3065 LT3065 Series APPLICATIONS INFORMATION The LT3065 are micropower, low noise and low drop-out voltage, 500mA linear regulators with micropower shutdown, programmable current limit, and a Power-good flag. The devices supply up to 500mA at a typical dropout voltage of 300mV and operates over a 1.8V to 45V input range. A single external capacitor provides low noise reference performance and output soft-start functionality. For example, connecting a 10nF capacitor from the REF/BYP pin to GND lowers output noise to 25μVRMS over a 10Hz to 100kHz bandwidth. This capacitor also soft starts the reference and prevents output voltage overshoot at turn-on. The LT3065’s quiescent current is merely 55μA but provides fast transient response with a low ESR, minimum value 3.3μF ceramic output capacitor. In shutdown, quiescent current is less than 1μA and the reference soft-start capacitor is reset. The LT3065 optimizes stability and transient response with low ESR, ceramic output capacitors. The regulator does not require the addition of ESR as is common with other regulators. The LT3065 typically provides better than 0.1% line regulation and 0.1% load regulation. Internal protection circuitry includes reverse battery protection, reverse output protection, reverse current protection, current limit with foldback and thermal shutdown. This “bullet-proof” protection set makes it ideal for use in battery-powered, automotive and industrial systems.In battery backup applications where the output is held up by a backup battery and the input is pulled to ground, the LT3065 acts like it has a diode in series with its output and prevents reverse current. Adjustable Operation The adjustable LT3065 has an output voltage range of 0.6V to 40V. Output voltage is set by the ratio of two external resistors, as shown in Figure 3. The device regulates the output to maintain the ADJ pin voltage at 0.6V referenced to ground. The current in R1 equals 0.6V/R1, and R2’s current is R1’s current minus the ADJ pin bias current. The ADJ pin bias current, 16nA at 25°C, flows from the ADJ pin through R1 to GND. Calculate the output voltage using the formula in Figure 3. R1’s value should not be greater than 62k to provide a minimum 10μA load current so that output voltage errors, caused by the ADJ pin bias current, are minimized. Note that in shutdown, the output is turned off and the divider current is zero. Curves of ADJ Pin Voltage vs Temperature and ADJ Pin Bias Current vs Temperature appear in the Typical Performance Characteristics section. + IN VIN VOUT OUT LT3065 SHDN R2 ADJ GND R1 3065 F03 ⎛ R2 ⎞ VOUT = 0.6V ⎜1+ ⎟ – (IADJ • R2) ⎝ R1⎠ VADJ = 0.6V IADJ = 16nA AT 25°C OUTPUT RANGE = 0.6V TO 40V Figure 3. Adjustable Operation The LT3065 is tested and specified with the ADJ pin tied to the OUT pin, yielding VOUT = 0.6V. Specifications for output voltages greater than 0.6V are proportional to the ratio of the desired output voltage to 0.6V: VOUT/0.6V. For example, load regulation for an output current change of 1mA to 500mA is 0.1mV (typical) at VOUT = 0.6V. At VOUT = 12V, load regulation is: 12V • (0.1mV) = 2mV 0.6V 3065fb For more information www.linear.com/LT3065 15 LT3065 Series APPLICATIONS INFORMATION Table 3. Output Voltage Resistor Divider Values VOUT (V) R1 (kΩ) R2 (kΩ) 1.2 60.4 60.4 1.5 59 88.7 1.8 59 118 2.5 60.4 191 3 59 237 3.3 61.9 280 5 59 432 Bypass Capacitance and Output Voltage Noise The LT3065 regulator provides low output voltage noise over a 10Hz to 100kHz bandwidth while operating at full load with the addition of a bypass capacitor (CREF/BYP) from the REF/BYP pin to GND. A high quality low leakage capacitor is recommended. This capacitor bypasses the internal reference of the regulator, providing a low frequency noise pole for the internal reference. With the use of 10nF for CREF/BYP, output voltage noise decreases to as low as 25μVRMS when the output voltage is set for 0.6V. For higher output voltages (generated by using a feedback resistor divider), the output voltage noise gains up proportionately when using CREF/BYP. Feedforward capacitance can also be used in fixed-voltage parts; the feedforward capacitor is connected from OUT to ADJ in the same manner. In this case, the current in the internal feedback resistor divider is 5μA. Using a feedforward capacitor (CFF) connected between VOUT and ADJ has the added benefit of improving transient response for output voltages greater than 0.6V. With no feedforward capacitor, the settling time increases as the output voltage increases above 0.6V. Use the equation in Figure 4 to determine the minimum value of CFF to achieve a transient response that is similar to the 0.6V output voltage performance regardless of the chosen output voltage (See Figure 5 and Transient Response in the Typical Performance Characteristics section). IN + VIN OUT LT3065 SHDN ADJ GND REF/BYP R2 CFF VOUT COUT R1 CREF/BYP 3065 F04 CFF ≥ 10nF • (IFB _DIVIDER) 10µA IFB _DIVIDER = VOUT R1+R2 Figure 4. Feedforward Capacitor for Fast Transient Response 0 VOUT 100mV/DIV To lower the higher output voltage noise, connect a feedforward capacitor (CFF) from VOUT to the ADJ pin. A high quality, low leakage capacitor is recommended. This capacitor bypasses the error amplifier of the regulator, providing an additional low frequency noise pole. With the use of 10nF for both CFF and CREF/BYP, output voltage noise decreases to 25μVRMS when the output voltage is set to 5V by a 10μA feedback resistor divider. If the current in the feedback resistor divider is doubled, CFF must also be doubled to achieve equivalent noise performance. onto the LT3065’s output. Power supply ripple rejection must also be considered. The LT3065 regulator does not have unlimited power supply rejection and passes a small portion of the input noise through to the output. FEEDFORWARD CAPACITOR, CFF Table 3 shows 1% resistor divider values for some common output voltages with a resistor divider current of 10μA. 100pF 1nF 10nF LOAD CURRENT 500mA/DIV 100µs/DIV VOUT = 5V COUT = 10µF IFB-DIVIDER = 10µA 3065 F05 Figure 5. Transient Response vs Feedforward Capacitor Higher values of output voltage noise can occur if care is not exercised with regard to circuit layout and testing. Crosstalk from nearby traces induces unwanted noise 3065fb 16 For more information www.linear.com/LT3065 LT3065 Series APPLICATIONS INFORMATION Output Capacitance and Transient Response The LT3065 regulator is stable with a wide range of output capacitors. The ESR of the output capacitor affects stability, most notably with small capacitors. Use a minimum output capacitor of 3.3μF with an ESR of 1Ω or less to prevent oscillations. For VOUT less than 1.2V, use a minimum COUT of 4.7µF. If a feedforward capacitor is used with output voltages set for greater than 24V, use a minimum output capacitor of 10μF. The LT3065 is a micropower device and output load transient response is a function of output capacitance. Larger values of output capacitance decrease the peak deviations and provide improved transient response for larger load current changes. Bypass capacitors, used to decouple individual components powered by the LT3065, increase the effective output capacitor value. For applications with large load current transients, a low ESR ceramic capacitor in parallel with a bulk tantalum capacitor often provides an optimally damped response. Give extra consideration to the use of ceramic capacitors. Manufacturers make ceramic capacitors with a variety of dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics are specified with EIA temperature characteristic codes of Z5U, Y5V, X5R and X7R. The Z5U and Y5V dielectrics provide high C-V products in a small package at low cost, but exhibit strong voltage and temperature coefficients, as shown in Figures 6 and 7. When used with a 5V regulator, a 16V 10μF Y5V capacitor can exhibit an effective value The X7R type works over a wider temperature range and has better temperature stability, while the X5R is less expensive and is available in higher values. Care still must be exercised when using X5R and X7R capacitors; the X5R and X7R codes only specify operating temperature range and maximum capacitance change over temperature. Capacitance change due to DC bias with X5R and X7R capacitors is better than Y5V and Z5U capacitors, but can still be significant enough to drop capacitor values below appropriate levels. Capacitor DC bias characteristics tend to improve as component case size increases, but expected capacitance at operating voltage should be verified. 20 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF 0 CHANGE IN VALUE (%) Using a feedforward capacitor also affects start-up time. Start-up time is directly proportional to the size of the feedforward capacitor and the output voltage, and is inversely proportional to the feedback resistor divider current, slowing to 15ms with a 10nF feedforward capacitor and a 10μF output capacitor for an output voltage set to 5V by a 10μA feedback resistor divider. as low as 1μF to 2μF for the DC bias voltage applied, and over the operating temperature range. The X5R and X7R dielectrics yield much more stable characteristics and are more suitable for use as the output capacitor. X5R –20 –40 –60 Y5V –80 –100 0 2 4 14 8 6 10 12 DC BIAS VOLTAGE (V) 16 3065 F06 Figure 6. Ceramic Capacitor DC Bias Characteristics 40 20 CHANGE IN VALUE (%) During start-up, the internal reference soft-starts when a REF/BYP capacitor is used. Regulator start-up time is directly proportional to the size of the bypass capacitor (see Start-Up Time vs REF/BYP Capacitor in the Typical Performance Characteristics section). The reference bypass capacitor is actively pulled low during shutdown to reset the internal reference. X5R 0 –20 –40 Y5V –60 –80 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF –100 –50 –25 50 25 75 0 TEMPERATURE (°C) 100 125 3065 F07 Figure 7. Ceramic Capacitor Temperature Characteristics 3065fb For more information www.linear.com/LT3065 17 LT3065 Series APPLICATIONS INFORMATION Voltage and temperature coefficients are not the only sources of problems. Some ceramic capacitors have a piezoelectric response. A piezoelectric device generates voltage across its terminals due to mechanical stress, similar to the way a piezoelectric accelerometer or microphone works. For a ceramic capacitor, the stress is induced by vibrations in the system or thermal transients. The resulting voltages produced cause appreciable amounts of noise. A ceramic capacitor produced the trace in Figure 8 in response to light tapping from a pencil. Similar vibration induced behavior can masquerade as increased output voltage noise. VOUT 1mV/DIV VOUT = 5V COUT = 10µF CREF/BYP = 10nF 10ms/DIV 3065 F08 Figure 8. Noise Resulting from Tapping On a Ceramic Capacitor Stability and Input Capacitance Low ESR, ceramic input bypass capacitors are acceptable for applications without long input leads. However, applications connecting a power supply to an LT3065 circuit’s IN and GND pins with long input wires combined with a low ESR, ceramic input capacitors are prone to voltage spikes, reliability concerns and application-specific board oscillations. The input wire inductance found in many battery-powered applications, combined with the low ESR ceramic input capacitor, forms a high Q LC resonant tank circuit. In some instances this resonant frequency beats against the output current dependent LDO bandwidth and interferes with proper operation. Simple circuit modifications/solutions are then required. This behavior is not indicative of LT3065 instability, but is a common ceramic input bypass capacitor application issue. The self-inductance, or isolated inductance, of a wire is directly proportional to its length. Wire diameter is not a major factor on its self-inductance. For example, the selfinductance of a 2-AWG isolated wire (diameter = 0.26") is about half the self-inductance of a 30-AWG wire (diameter = 0.01"). One foot of 30-AWG wire has approximately 465nH of self-inductance. Two methods can reduce wire self-inductance. One method divides the current flowing towards the LT3065 between two parallel conductors. In this case, the farther apart the wires are from each other, the more the self-inductance is reduced; up to a 50% reduction when placed a few inches apart. Splitting the wires connects two equal inductors in parallel, but placing them in close proximity creates mutual inductance adding to the self-inductance. The second and most effective way to reduce overall inductance is to place both forward and return current conductors (the input and GND wires) in very close proximity. Two 30-AWG wires separated by only 0.02", used as forward and return current conductors, reduce the overall self-inductance to approximately one-fifth that of a single isolated wire. If a battery, mounted in close proximity, powers the LT3065, a 10µF input capacitor suffices for stability. However, if a distant supply powers the LT3065, use a larger value input capacitor. Use a rough guideline of 1µF (in addition to the 10µF minimum) per 8 inches of wire length. The minimum input capacitance needed to stabilize the application also varies with power supply output impedance variations. Placing additional capacitance on the LT3065’s output also helps. However, this requires an order of magnitude more capacitance in comparison with additional LT3065 input bypassing. Series resistance between the supply and the LT3065 input also helps stabilize the application; as little as 0.1Ω to 0.5Ω suffices. This impedance dampens the LC tank circuit at the expense of dropout voltage. A better alternative is to use higher ESR tantalum or electrolytic capacitors at the LT3065 input in place of ceramic capacitors. IMAX Pin Operation The IMAX pin is the collector of a PNP that sources a current equal to 1/500th of output load current (see Block Diagram). The IMAX pin is also the input to the precision 3065fb 18 For more information www.linear.com/LT3065 LT3065 Series APPLICATIONS INFORMATION current limit amplifier. Connecting a resistor (RIMAX) from IMAX to GND sets the current limit threshold. If the output load increases to a level such that the IMAX pin voltage reaches 0.6V, the current limit amplifier takes control and regulates the IMAX voltage to 0.6V, regardless of the output voltage. Calculate the required RIMAX value for a given current limit from the following formula: RIMAX = 500 • 0.6V ILIMIT In cases where the IN to OUT differential voltage exceeds 10V, current limit foldback lowers the internal current limit level, possibly causing it to override the external programmable current limit. See the Internal Current Limit vs VIN – VOUT graph in the Typical Performance Characteristics section. The IMAX pin requires a 22nF decoupling capacitor. If the external programmable current limit is not used, connect the IMAX pin directly to GND. LT3065 power dissipation increases the IMAX threshold at a rate of approximately 0.5 percent per watt. PWRGD Pin Operation The PWRGD pin is an open-drain high voltage NMOS digital output capable of sinking 50µA. The PWRGD pin de-asserts and becomes high impedance if the output rises above 90% of its nominal value. If the output falls below 88.4% of its nominal value for more than 25μs, the PWRGD pin asserts low. The PWRGD comparator has 1.6% hysteresis and 25μs of deglitching. The PWRGD comparator has a dedicated reference that does not soft-start if a capacitor is used on the REF/BYP pin. The use of a feed-forward capacitor, CFF, as shown in Figure 4, can result in the ADJ pin being pulled artificially high during startup transients, which causes the PWRGD flag to assert early. To avoid this problem, ensure that the REF/BYP capacitor is significantly larger than the feed-forward capacitor, causing REF/BYP time constant to dominate over the time constant of the resistor divider network. Operation in Dropout Some degradation of the IMAX current mirror accuracy occurs for output currents less than 50mA when operating in dropout. Overload Recovery Like many IC power regulators, the LT3065 has safe operating area protection. The safe area protection decreases current limit as input-to-output voltage increases, and keeps the power transistor inside a safe operating region for all values of input-to-output voltage. The LT3065 provides some output current at all values of input-to-output voltage up to the device’s Absolute Maximum Rating. When power is first applied, the input voltage rises and the output follows the input; allowing the regulator to start-up into very heavy loads. During start-up, as the input voltage is rising, the input-to-output voltage differential is small, allowing the regulator to supply large output currents. With a high input voltage, a problem can occur wherein the removal of an output short will not allow the output to recover. Other regulators, such as the LT1083/LT1084/ LT1085 family and LT1764A also exhibit this phenomenon, so it is not unique to the LT3065. The problem occurs with a heavy output load when the input voltage is high and the output voltage is low. Common situations are immediately after the removal of a short circuit or if the shutdown pin is pulled high after the input voltage is already turned on. The load line intersects the output current curve at two points. If this happens, there are two stable output operating points for the regulator. With this double intersection, the input power supply needs to be cycled down to zero and back up again to recover the output. 3065fb For more information www.linear.com/LT3065 19 LT3065 Series APPLICATIONS INFORMATION Thermal Considerations The LT3065’s maximum rated junction temperature of 125°C (E-, I-grades) or 150°C (MP-, H-grades) limits its power handling capability. Two components comprise the power dissipated by the device: 1.Output current multiplied by the input/output voltage differential: IOUT • (VIN – VOUT), Tables 4 and 5 list thermal resistance as a function of copper area in a fixed board size. All measurements were taken in still air on a 4-layer FR-4 board with 1oz solid internal planes, and 2oz external trace planes with a total board thickness of 1.6mm. For further information on thermal resistance and using thermal information, refer to JEDEC standard JESD51, notably JESD51-12. Table 4. MSOP Measured Thermal Resistance COPPER AREA and TOPSIDE 2.GND pin current multiplied by the input voltage: IGND • VIN GND pin current is determined using the GND Pin Current curves in the Typical Performance Characteristics section. Power dissipation equals the sum of the two components listed above. The LT3065 regulator has internal thermal limiting that protects the device during overload conditions. For continuous normal conditions, do not exceed the maximum junction temperature of 125°C (E-, I-grades) or 150°C (MP-, H-grades). Carefully consider all sources of thermal resistance from junction-to-ambient including other heat sources mounted in proximity to the LT3065. The undersides of the LT3065 DFN and MSE packages have exposed metal from the lead frame to the die attachment. These packages allow heat to directly transfer from the die junction to the printed circuit board metal to control maximum operating junction temperature. The dual-inline pin arrangement allows metal to extend beyond the ends of the package on the topside (component side) of a PCB. Connect this metal to GND on the PCB. The multiple IN and OUT pins of the LT3065 also assist in spreading heat to the PCB. For surface mount devices, heat sinking is accomplished by using the heat spreading capabilities of the PC board and its copper traces. Copper board stiffeners and plated through-holes also can spread the heat generated by power devices. BACKSIDE THERMAL RESISTANCE BOARD AREA (JUNCTION-TO-AMBIENT) 2500 sq mm 2500 sq mm 2500 sq mm 28°C/W 1000 sq mm 2500 sq mm 2500 sq mm 31°C/W 225 sq mm 2500 sq mm 2500 sq mm 32°C/W 100 sq mm 2500 sq mm 2500 sq mm 33°C/W Table 5. DFN Measured Thermal Resistance COPPER AREA TOPSIDE BOARD AREA THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 2500 sq mm 2500 sq mm 31°C/W 1000 sq mm 2500 sq mm 32°C/W 225 sq mm 2500 sq mm 34°C/W 100 sq mm 2500 sq mm 35°C/W Calculating Junction Temperature Example: Given an output voltage of 5V, an input voltage range of 12V ±5%, a maximum output current range of 75mA and a maximum ambient temperature of 85°C, what is the maximum junction temperature? The power dissipated by the device equals: IOUT(MAX) • (VIN(MAX) – VOUT) + IGND • VIN(MAX) where: IOUT(MAX) = 75mA VIN(MAX) = 12.6V IGND at (IOUT = 75mA, VIN = 12V) = 3.5mA So: P = 75mA • (12.6V – 5V) + 3.5mA • 12.6V = 0.614W 3065fb 20 For more information www.linear.com/LT3065 LT3065 Series APPLICATIONS INFORMATION 0.614W • 35°C/W = 21.5°C The maximum junction temperature equals the maximum ambient temperature plus the maximum junction temperature rise above ambient or: TJMAX = 85°C + 21.5°C = 106.5°C Protection Features The LT3065 incorporates several protection features that make it ideal for use in battery-powered circuits. In addition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device also protects against reverse input voltages, reverse output voltages and reverse output-toinput voltages. Current limit protection and thermal overload protection protect the device against current overload conditions at the LT3065’s output. The typical thermal shutdown temperature is 165°C with about 7°C of hysteresis. For normal operation, do not exceed a junction temperature of 125°C (E-, I-grades) or 150°C (MP-, H-grades). The LT3065 incurs no damage if its output is pulled below ground. If the input is left open circuit or grounded, the output can be pulled below ground by 50V. No current flows through the pass transistor from the output. However, current flows in (but is limited by) the feedback resistor divider that sets the output voltage. Current flows from the bottom resistor in the divider and from the ADJ pin’s internal clamp through the top resistor in the divider to the external circuitry pulling OUT below ground. If a voltage source powers the input, the output sources current equal to its current limit capability and the LT3065 protects itself by thermal limiting. In this case, grounding the SHDN pin turns off the device and stops the output from sourcing current. 1.0 VIN = 0 0.9 0.8 OUTPUT CURRENT (µA) Using a DFN package, the thermal resistance ranges from 31°C/W to 35°C/W depending on the copper area. So the junction temperature rise above ambient approximately equals: 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 The LT3065 IN pin withstands reverse voltages of 50V. The device limits current flow to less than 1μA (typically less than 25nA) and no negative voltage appears at OUT. The device protects both itself and the load against batteries that are plugged in backwards. 5 10 15 20 25 VOUT (V) 30 35 40 3055 F09 Figure 9. Reverse Output Current 3065fb For more information www.linear.com/LT3065 21 LT3065 Series TYPICAL APPLICATIONS Programming Undervoltage Lockout IN VIN > VUVLO IN R1 LT3065 SHDN R2 3065 TA02 VUVLO = R1+R2 • 1.1V R2 Power Supply Sequencing Using PWRGD IN IN SHDN LT3065 PWRGD 500k IN LT3065 SHDN 3065 TA03 3065fb 22 For more information www.linear.com/LT3065 LT3065 Series TYPICAL APPLICATIONS Current Monitor ⎛ 600mV ⎞ ⎟ • 500 RIMAX = ⎜⎜ ⎟ ⎝IOUT(MAX) ⎠ LT3065 VLIM = IMAX IOUT • RIMAX 500 TO ADC RIMAX 3065 TA04 LED Driver/Current Source 5V IN IN OPEN-LED INDICATOR LED I = 100mA ADJ PWRGD SHDN 22nF OUT LT3065 100k SHDN ILIM = 150mA IMAX 2k 6Ω GND REF/BYP 10nF 3065 TA05 3065fb For more information www.linear.com/LT3065 23 LT3065 Series TYPICAL APPLICATIONS Paralleling Regulators for Higher Output Current VIN > 3V IN 10µF PWRGD OUT 500k 19.1k 1% LT3065 PWRGD 10µF 2.5V 1A ADJ 6.04k 1% SHDN SHDN GND IMAX REF/BYP 10nF 49.9Ω IN OUT 10µF 21k 1% 10µF LT3065 PWRGD ADJ 6.04k 1% SHDN GND IMAX REF/BYP 10nF 49.9Ω 1k 1k 0.1µF 10k + LT1637 – 33nF 6.8k 3065 TA06 3065fb 24 For more information www.linear.com/LT3065 LT3065 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DD Package DD Package 10-Lead10-Lead Plastic DFN (3mm Plastic DFN× 3mm) (3mm × 3mm) (Reference LTC DWGLTC # 05-08-1669 Rev C) Rev C) (Reference DWG # 05-08-1699 0.70 ±0.05 3.55 ±0.05 1.65 ±0.05 2.15 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 2.38 ±0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 3.00 ±0.10 (4 SIDES) R = 0.125 TYP 6 0.40 ±0.10 10 1.65 ±0.10 (2 SIDES) PIN 1 NOTCH R = 0.20 OR 0.35 × 45° CHAMFER PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF 5 0.75 ±0.05 0.00 – 0.05 1 (DD) DFN REV C 0310 0.25 ±0.05 0.50 BSC 2.38 ±0.10 (2 SIDES) BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-2). CHECK THE LTC WEBSITE DATA SHEET FOR CURRENT STATUS OF VARIATION ASSIGNMENT 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 3065fb For more information www.linear.com/LT3065 25 LT3065 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. MSE Package 12-Lead Plastic , Exposed Die Pad MSEMSOP Package (Reference LTC DWG # 05-08-1666 12-Lead Plastic MSOP, Exposed Rev Die G) Pad (Reference LTC DWG # 05-08-1666 Rev G) BOTTOM VIEW OF EXPOSED PAD OPTION 2.845 ±0.102 (.112 ±.004) 5.10 (.201) MIN 2.845 ±0.102 (.112 ±.004) 0.889 ±0.127 (.035 ±.005) 6 1 1.651 ±0.102 (.065 ±.004) 1.651 ±0.102 3.20 – 3.45 (.065 ±.004) (.126 – .136) 12 0.65 0.42 ±0.038 (.0256) (.0165 ±.0015) BSC TYP RECOMMENDED SOLDER PAD LAYOUT 0.254 (.010) 0.35 REF 4.039 ±0.102 (.159 ±.004) (NOTE 3) 0.12 REF DETAIL “B” CORNER TAIL IS PART OF DETAIL “B” THE LEADFRAME FEATURE. FOR REFERENCE ONLY 7 NO MEASUREMENT PURPOSE 0.406 ±0.076 (.016 ±.003) REF 12 11 10 9 8 7 DETAIL “A” 0° – 6° TYP 3.00 ±0.102 (.118 ±.004) (NOTE 4) 4.90 ±0.152 (.193 ±.006) GAUGE PLANE 0.53 ±0.152 (.021 ±.006) DETAIL “A” 1.10 (.043) MAX 0.18 (.007) SEATING PLANE 0.22 – 0.38 (.009 – .015) TYP 1 2 3 4 5 6 0.650 (.0256) BSC NOTE: 1. DIMENSIONS IN MILLIMETER/(INCH) 2. DRAWING NOT TO SCALE 3. DIMENSION DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. MOLD FLASH, PROTRUSIONS OR GATE BURRS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 4. DIMENSION DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. INTERLEAD FLASH OR PROTRUSIONS SHALL NOT EXCEED 0.152mm (.006") PER SIDE 5. LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX 6. EXPOSED PAD DIMENSION DOES INCLUDE MOLD FLASH. MOLD FLASH ON E-PAD SHALL NOT EXCEED 0.254mm (.010") PER SIDE. 0.86 (.034) REF 0.1016 ±0.0508 (.004 ±.002) MSOP (MSE12) 0213 REV G 3065fb 26 For more information www.linear.com/LT3065 LT3065 Series REVISION HISTORY REV DATE DESCRIPTION A 7/14 Added fixed voltage options and related specs, curves, pin functions, text PAGE NUMBER Modified pinouts to accommodate new fixed voltage options B 11/14 Throughout 2 Added specification for Absolute Maximum SENSE pin voltage 2 Modified Bypass Capacitance section 10 Fixed pin function description 13 3065fb Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no representation that the interconnection of its circuits as described herein will not infringe on existing patent rights. For more information www.linear.com/LT3065 27 LT3065 Series TYPICAL APPLICATION Adjustable High Efficiency Regulator CMDSH-4E 4.5V TO 25V VIN 1µF 10µF 100k BOOST 0.1µF LT3493 SHDN 10µH SW IN 0.1µF 47µF ×2 MBRM140 255k 4.7µF LT3065 SHDN 10nF GND FB TP0610L 10k OUT ADJ 100k 10µF 61.9k 1% PWRGD REF/BYP * DIFFERENTIAL VOLTAGE ON LT3065 ≈ 1.4V SET BY THE TP0610L P-CHANNEL THRESHOLD. 1M 0.6V TO 10VOUT 200mA 10nF IMAX GND 1.2k 22nF 3065 TA07 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1761 100mA, Low Noise LDO 300mV Dropout Voltage, Low Noise: 20μVRMS, VIN = 1.8V to 20V, ThinSOT™ Package LT1762 150mA, Low Noise LDO 300mV Dropout Voltage, Low Noise: 20μVRMS, VIN = 1.8V to 20V, MS8 Package LT1763 500mA, Low Noise LDO 300mV Dropout Voltage, Low Noise: 20μVRMS, VIN = 1.8V to 20V, SO-8 and 3mm × 4mm DFN Packages LT1962 300mA, Low Noise LDO 270mV Dropout Voltage, Low Noise: 20μVRMS, VIN = 1.8V to 20V, MS8 Package LT1964 200mA, Low Noise Negative LDO VIN = –2.2V to –20V, VOUT(MIN) = –1.21V, VDO = 0.34V, IQ = 30μA, ISD = 3μA, Low Noise <30μVRMS, Stable with Ceramic Capacitors, ThinSOT and 3mm × 3mm DFN Packages LT1965 1.1A, Low Noise LDO 290mV Dropout Voltage, Low Noise: 40μVRMS, VIN = 1.8V to 20V, VOUT = 1.2V to 19.5V, Stable with Ceramic Capacitors, TO-220, DD-Pak, MSOP and 3mm × 3mm DFN Packages LT3050 100mA LDO with Diagnostics and Precision Current Limit 340mV Dropout Voltage, Low Noise: 30μVRMS, VIN = 1.8V to 45V, 3mm × 2mm DFN and MSOP Packages LT3055 500mA LDO with Diagnostics and Precision Current Limit 350mV Dropout Voltage, Low Noise: 25μVRMS, VIN = 1.8V to 45V, 4mm × 3mm DFN and MSOP Packages LT3060 100mA Low Noise LDO with Soft-Start 300mV Dropout Voltage, Low Noise: 30μVRMS, VIN = 1.8V to 45V, 2mm × 2mm DFN and ThinSOT Packages LT3080/ LT3080-1 1.1A, Parallelable, Low Noise LDO 300mV Dropout Voltage (2-Supply Operation), Low Noise 40µVRMS, VIN = 1.2V to 36V, VOUT = 0V to 35.7V, Current-Based Reference with 1-Resistor VOUT Set, Directly Parallelable, Stable with Ceramic Capacitors, TO-220, SOT-223, MSOP and 3mm × 3mm DFN LT3082 200mA, Parallelable, Low Noise LDO Outputs may be Paralleled for Higher Output Current or Heat Spreading, Wide Input Voltage Range: 1.2V to 40V, Low Value Input/Output Capacitors Required: 2.2µF, Single Resistor Sets Output Voltage, 8-Lead SOT-23, 3-Lead SOT-223 and 8-Lead 3mm × 3mm DFN Packages LT3085 500mA, Parallelable, Low Noise LDO 275mV Dropout Voltage (2-Supply Operation), Low Noise 40µVRMS, VIN = 1.2V to 36V, VOUT = 0V to 35.7V, Current-Based Reference with 1-Resistor VOUT Set, Directly Parallelable, Stable with Ceramic Capacitors, MS8E and 2mm × 3mm DFN-6 Packages 3065fb 28 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LT3065 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT3065 LT 1114 REV B • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2014