LT3015 Series 1.5A, Low Noise, Negative Linear Regulator with Precision Current Limit DESCRIPTION FEATURES n n n n n n n n n n n n n n n n n Output Current: 1.5A Dropout Voltage: 310mV Precision Current Limit with Foldback Low Output Noise: 60µVRMS (10Hz to 100kHz) Low Quiescent Current: 1.1mA Precision Positive or Negative Shutdown Logic Fast Transient Response Wide Input Voltage Range: –1.8V to –30V Adjustable Output Voltage Range: –1.22V to –29.3V Fixed Output Voltages: –2.5V, –3V, –3.3V, –5V, –12V, –15V Controlled Quiescent Current in Dropout <1µA Quiescent Current in Shutdown Stable with 10µF Output Capacitor Stable with Ceramic, Tantalum or Aluminum Capacitors Thermal Limit with Hysteresis Reverse Output Protection 5-Lead TO-220 and DD-Pak, Thermally Enhanced 12-Lead MSOP and 8-Lead 3mm × 3mm × 0.75mm DFN Packages APPLICATIONS n n n n n The LT®3015 series are low noise, low dropout, negative linear regulators with fast transient response. The devices supply up to 1.5A of output current at a typical dropout voltage of 310mV. Operating quiescent current is typically 1.1mA and drops to < 1µA in shutdown. Quiescent current is also well controlled in dropout. In addition to fast transient response, the LT3015 series exhibit very low output noise, making them ideal for noise sensitive applications. The LT3015 regulators are stable with a minimum 10µF output capacitor. Moreover, the regulator can use small ceramic capacitors without the necessary addition of ESR as is common with other regulators. Internal protection circuitry includes reverse output protection, precision current limit with foldback and thermal limit with hysteresis. The LT3015 regulators are available in fixed output voltages of –2.5V, –3V, –3.3V, –5V, –12V and –15V and as an adjustable device with a –1.22V reference voltage. Packages include the 5-lead TO-220 and DD-Pak, a thermally enhanced 12-lead MSOP and the low profile (0.75 mm) 8-lead 3mm × 3mm DFN. 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. Post-Regulator for Switching Supplies Negative Logic Supplies Low Noise Instrumentation Industrial Supplies Negative Complement to the LT1963A TYPICAL APPLICATION Dropout Voltage 450 –5V, –1.5A, Low Noise Regulator LT3015-5 SHDN VIN –5.5V TO –30V IN SENSE OUT 3015 TA01 10µF VOUT –5V –1.5A DROPOUT VOLTAGE (mV) GND 10µF TJ = 25°C 400 350 300 DD-PAK/TO-220 250 200 DFN/MSOP 150 100 50 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 LT3015 Series ABSOLUTE MAXIMUM RATINGS (Note 1) IN Pin Voltage..........................................................±33V OUT Pin Voltage (Note 10).......................................±33V OUT to IN Differential Voltage (Note 10).........–0.3V, 33V SENSE Pin Voltage (with Respect to IN Pin) (Note 10)..................–0.3V, 33V ADJ Pin Voltage (with Respect to IN Pin) (Note 10)..................–0.3V, 33V SHDN Pin Voltage (with Respect to IN Pin) (Note 10)..................–0.3V, 55V SHDN Pin Voltage (with Respect to GND Pin)...............................–33V, 22V Output Short-Circuit Duration........................... Indefinite Operating Junction Temperature Range (Note 9) E-, I-Grade......................................... –40°C to 125°C MP-Grade.......................................... –55°C to 125°C Storage Temperature Range................... –65°C to 150°C Lead Temperature (Soldering, 10Sec) MS12E Package................................................. 300°C Q, T Packages.................................................... 250°C PIN CONFIGURATION TOP VIEW IN 1 IN 2 SHDN 3 GND 4 TOP VIEW IN IN IN IN SHDN GND 8 OUT 7 OUT 9 IN 6 SENSE/ADJ* 5 GND DD PACKAGE 8-LEAD (3mm × 3mm) PLASTIC DFN TJMAX = 125°C, qJA = 40°C/W, qJC = 7.5°C/W EXPOSED PAD (PIN 9) IS IN, MUST BE SOLDERED TO PCB *PIN 6 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 6 = ADJ FOR LT3015 13 IN 12 11 10 9 8 7 OUT OUT OUT OUT SENSE/ADJ* GND MSE PACKAGE 12-LEAD PLASTIC MSOP TJMAX = 125°C, qJA = 37°C/W, qJC = 10°C/W EXPOSED PAD (PIN 13) IS IN, MUST BE SOLDERED TO PCB *PIN 8 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 8 = ADJ FOR LT3015 FRONT VIEW TAB IS IN 1 2 3 4 5 6 FRONT VIEW 5 OUT 5 OUT 4 SENSE/ADJ* 4 SENSE/ADJ* 3 IN 3 IN 2 GND 2 GND 1 SHDN 1 SHDN Q PACKAGE 5-LEAD PLASTIC DD-PAK TJMAX = 125°C, qJA = 14°C/W, qJC = 3°C/W *PIN 4 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 4 = ADJ FOR LT3015 TAB IS IN T PACKAGE 5-LEAD PLASTIC TO-220 TJMAX = 125°C, qJA = 50°C/W, qJC = 3°C/W *PIN 4 = SENSE FOR LT3015-2.5/-3/-3.3/-5/-12/-15 *PIN 4 = ADJ FOR LT3015 3015fb 2 LT3015 Series ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3015EDD#PBF LT3015EDD#TRPBF LFXS 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD#PBF LT3015IDD#TRPBF LFXS 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EDD-2.5#PBF LT3015EDD-2.5#TRPBF LGDJ 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD-2.5#PBF LT3015IDD-2.5#TRPBF LGDJ 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EDD-3#PBF LT3015EDD-3#TRPBF LGDK 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD-3#PBF LT3015IDD-3#TRPBF LGDK 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EDD-3.3#PBF LT3015EDD-3.3#TRPBF LGDM 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD-3.3#PBF LT3015IDD-3.3#TRPBF LGDM 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EDD-5#PBF LT3015EDD-5#TRPBF LGDN 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD-5#PBF LT3015IDD-5#TRPBF LGDN 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EDD-12#PBF LT3015EDD-12#TRPBF LGDP 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD-12#PBF LT3015IDD-12#TRPBF LGDP 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EDD-15#PBF LT3015EDD-15#TRPBF LGDQ 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015IDD-15#PBF LT3015IDD-15#TRPBF LGDQ 8-Lead (3mm × 3mm) Plastic DFN –40°C to 125°C LT3015EMSE#PBF LT3015EMSE#TRPBF 3015 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE#PBF LT3015IMSE#TRPBF 3015 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE#PBF LT3015MPMSE#TRPBF 3015 12-Lead Plastic MSOP –55°C to 125°C LT3015EMSE-2.5#PBF LT3015EMSE-2.5#TRPBF 301525 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE-2.5#PBF LT3015IMSE-2.5#TRPBF 301525 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE-2.5#PBF LT3015MPMSE-2.5#TRPBF 301525 12-Lead Plastic MSOP –55°C to 125°C LT3015EMSE-3#PBF LT3015EMSE-3#TRPBF 30153 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE-3#PBF LT3015IMSE-3#TRPBF 30153 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE-3#PBF LT3015MPMSE-3#TRPBF 30153 12-Lead Plastic MSOP –55°C to 125°C LT3015EMSE-3.3#PBF LT3015EMSE-3.3#TRPBF 301533 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE-3.3#PBF LT3015IMSE-3.3#TRPBF 301533 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE-3.3#PBF LT3015MPMSE-3.3#TRPBF 301533 12-Lead Plastic MSOP –55°C to 125°C LT3015EMSE-5#PBF LT3015EMSE-5#TRPBF 30155 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE-5#PBF LT3015IMSE-5#TRPBF 30155 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE-5#PBF LT3015MPMSE-5#TRPBF 30155 12-Lead Plastic MSOP –55°C to 125°C LT3015EMSE-12#PBF LT3015EMSE-12#TRPBF 301512 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE-12#PBF LT3015IMSE-12#TRPBF 301512 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE-12#PBF LT3015MPMSE-12#TRPBF 301512 12-Lead Plastic MSOP –55°C to 125°C LT3015EMSE-15#PBF LT3015EMSE-15#TRPBF 301515 12-Lead Plastic MSOP –40°C to 125°C LT3015IMSE-15#PBF LT3015IMSE-15#TRPBF 301515 12-Lead Plastic MSOP –40°C to 125°C LT3015MPMSE-15#PBF LT3015MPMSE-15#TRPBF 301515 12-Lead Plastic MSOP –55°C to 125°C 3015fb 3 LT3015 Series ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3015EQ#PBF LT3015EQ#TRPBF LT3015Q 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ#PBF LT3015IQ#TRPBF LT3015Q 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ#PBF LT3015MPQ#TRPBF LT3015Q 5-Lead Plastic DD-Pak –55°C to 125°C LT3015EQ-2.5#PBF LT3015EQ-2.5#TRPBF LT3015Q-2.5 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ-2.5#PBF LT3015IQ-2.5#TRPBF LT3015Q-2.5 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ-2.5#PBF LT3015MPQ-2.5#TRPBF LT3015Q-2.5 5-Lead Plastic DD-Pak –55°C to 125°C LT3015EQ-3#PBF LT3015EQ-3#TRPBF LT3015Q-3 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ-3#PBF LT3015IQ-3#TRPBF LT3015Q-3 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ-3#PBF LT3015MPQ-3#TRPBF LT3015Q-3 5-Lead Plastic DD-Pak –55°C to 125°C LT3015EQ-3.3#PBF LT3015EQ-3.3#TRPBF LT3015Q-3.3 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ-3.3#PBF LT3015IQ-3.3#TRPBF LT3015Q-3.3 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ-3.3#PBF LT3015MPQ-3.3#TRPBF LT3015Q-3.3 5-Lead Plastic DD-Pak –55°C to 125°C LT3015EQ-5#PBF LT3015EQ-5#TRPBF LT3015Q-5 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ-5#PBF LT3015IQ-5#TRPBF LT3015Q-5 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ-5#PBF LT3015MPQ-5#TRPBF LT3015Q-5 5-Lead Plastic DD-Pak –55°C to 125°C LT3015EQ-12#PBF LT3015EQ-12#TRPBF LT3015Q-12 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ-12#PBF LT3015IQ-12#TRPBF LT3015Q-12 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ-12#PBF LT3015MPQ-12#TRPBF LT3015Q-12 5-Lead Plastic DD-Pak –55°C to 125°C LT3015EQ-15#PBF LT3015EQ-15#TRPBF LT3015Q-15 5-Lead Plastic DD-Pak –40°C to 125°C LT3015IQ-15#PBF LT3015IQ-15#TRPBF LT3015Q-15 5-Lead Plastic DD-Pak –40°C to 125°C LT3015MPQ-15#PBF LT3015MPQ-15#TRPBF LT3015Q-15 5-Lead Plastic DD-Pak –55°C to 125°C LT3015ET#PBF LT3015ET#TRPBF LT3015T 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT#PBF LT3015IT#TRPBF LT3015T 5-Lead Plastic TO-220 –40°C to 125°C LT3015ET-2.5#PBF LT3015ET-2.5#TRPBF LT3015T-2.5 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT-2.5#PBF LT3015IT-2.5#TRPBF LT3015T-2.5 5-Lead Plastic TO-220 –40°C to 125°C LT3015ET-3#PBF LT3015ET-3#TRPBF LT3015T-3 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT-3#PBF LT3015IT-3#TRPBF LT3015T-3 5-Lead Plastic TO-220 –40°C to 125°C LT3015ET-3.3#PBF LT3015ET-3.3#TRPBF LT3015T-3.3 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT-3.3#PBF LT3015IT-3.3#TRPBF LT3015T-3.3 5-Lead Plastic TO-220 –40°C to 125°C LT3015ET-5#PBF LT3015ET-5#TRPBF LT3015T-5 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT-5#PBF LT3015IT-5#TRPBF LT3015T-5 5-Lead Plastic TO-220 –40°C to 125°C LT3015ET-12#PBF LT3015ET-12#TRPBF LT3015T-12 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT-12#PBF LT3015IT-12#TRPBF LT3015T-12 5-Lead Plastic TO-220 –40°C to 125°C LT3015ET-15#PBF LT3015ET-15#TRPBF LT3015T-15 5-Lead Plastic TO-220 –40°C to 125°C LT3015IT-15#PBF LT3015IT-15#TRPBF LT3015T-15 5-Lead Plastic TO-220 –40°C to 125°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 non-standard 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/ 3015fb 4 LT3015 Series ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS Minimum IN Pin Voltage (Notes 2, 12) ILOAD = –0.5A ILOAD = –1.5A Regulated Output Voltage (Note 3) LT3015-2.5: VIN = –3.0V, ILOAD = –1mA LT3015-2.5: –30V < VIN < –3.5V, –1.5A < ILOAD < –1mA LT3015-3: VIN = –3.5, ILOAD = –1mA LT3015-3: –30V < VIN < –4 V, –1.5A < ILOAD < –1mA LT3015-3.3: VIN = –3.8, ILOAD = –1mA LT3015-3.3: –30V < VIN < –4.3V, –1.5A < ILOAD < –1mA LT3015-5: VIN = –5.5, ILOAD = –1mA LT3015-5: –30V < VIN < –6V, –1.5A < ILOAD < –1mA LT3015-12: VIN = –12.5, ILOAD = –1mA LT3015-12: –30V < VIN < –13V, –1.5A < ILOAD < –1mA LT3015-15: VIN = –15.5, ILOAD = –1mA LT3015-15: –30V < VIN < –16V, –1.5A < ILOAD < –1mA MIN l l –2.475 –2.45 –2.97 –2.94 –3.267 –3.234 –4.95 –4.9 –11.88 –11.76 –14.85 –14.7 LT3015: VIN = –2.3V, ILOAD = –1mA LT3015: –30V < VIN < –2.3V, –1.5A < ILOAD < –1mA l –1.208 –1.196 Line Regulation LT3015-2.5: ∆VIN = –3.0V to –30V, ILOAD = –1mA LT3015-3: ∆VIN = –3.5V to –30V, ILOAD = –1mA LT3015-3.3: ∆VIN = –3.8V to –30V, ILOAD = –1mA LT3015-5: ∆VIN = –5.5V to –30V, ILOAD = –1mA LT3015-12: ∆VIN = –12.5V to –30V, ILOAD = –1mA LT3015-15: ∆VIN = –15.5V to –30V, ILOAD = –1mA LT3015: ∆VIN = –2.3V to –30V, ILOAD = –1mA (Note 2) l l l l l l l Load Regulation LT3015-2.5: VIN = –3.5V, ∆ILOAD = –1mA to –1.5A LT3015-2.5: VIN = –3.5V, ∆ILOAD = –1mA to –1.5A LT3015-3: VIN = –4V, ∆ILOAD = –1mA to –1.5A LT3015-3: VIN = –4V, ∆ILOAD = –1mA to –1.5A LT3015-3.3: VIN = –4.3V, ∆ILOAD = –1mA to –1.5A LT3015-3.3: VIN = –4.3V, ∆ILOAD = –1mA to –1.5A LT3015-5: VIN = –6V, ∆ILOAD = –1mA to –1.5A LT3015-5: VIN = –6V, ∆ILOAD = –1mA to –1.5A LT3015-12: VIN = –13V, ∆ILOAD = –1mA to –1.5A LT3015-12: VIN = –13V, ∆ILOAD = –1mA to –1.5A LT3015-15: VIN = –16V, ∆ILOAD = –1mA to –1.5A LT3015-15: VIN = –16V, ∆ILOAD = –1mA to –1.5A LT3015: VIN = –2.3V, ∆ILOAD = –1mA to –1.5A (Note 2) LT3015: VIN = –2.3V, ∆ILOAD = –1mA to –1.5A (Note 2) ADJ Pin Voltage (Notes 2, 3) Dropout Voltage VIN = VOUT(NOMINAL) (Notes 4, 5) ILOAD = –1mA ILOAD = –1mA ILOAD = –100mA ILOAD = –100mA ILOAD = –500mA (DFN/MSOP) ILOAD = –500mA (DFN/MSOP) ILOAD = –500mA (DD-PAK/TO-220) ILOAD = –500mA (DD-PAK/TO-220) ILOAD = –1.5A (DFN/MSOP) ILOAD = –1.5A (DFN/MSOP) ILOAD = –1.5A (DD-PAK/TO-220) ILOAD = –1.5A (DD-PAK/TO-220) GND Pin Current VIN = VOUT(NOMINAL) (Notes 4, 6) ILOAD = 0mA ILOAD = –1mA ILOAD = –100mA ILOAD = –500mA ILOAD = –1.5A Output Voltage Noise (Note 2) LT3015: COUT = 10µF, ILOAD = –1.5A, BW = 10Hz to 100kHz, VOUT = –1.22V SENSE Pin Bias Current (Note 13) LT3015-2.5/-3/-3.3/-5/-12/-15 l l l l l TYP MAX UNITS –1.8 –1.8 –2.3 V V –2.5 –2.5 –3 –3 –3.3 –3.3 –5 –5 –12 –12 –15 –15 –2.525 –2.55 –3.03 –3.06 –3.333 –3.366 –5.05 –5.1 –12.12 –12.24 –15.15 –15.3 V V V V V V V V V V V V –1.22 –1.22 –1.232 –1.244 V V 4 4.5 5 5.5 9 9 2.5 12 15 16 20 27 27 6 mV mV mV mV mV mV mV 3 6 18 7.5 23 10.5 25 10.5 26 25 62 30 73 3.8 9 mV mV mV mV mV mV mV mV mV mV mV mV mV mV 0.095 0.16 0.16 0.24 0.23 0.32 0.27 0.39 0.39 0.5 0.51 0.68 V V V V V V V V V V V V l 4 l 5 l 5.5 l 13 l 16 l 2 l 0.055 l 0.1 l 0.17 l 0.2 l 0.31 l 0.41 l 1.1 1.15 2.9 9.5 35 l l l l l 2.4 2.5 7 23 70 60 l 70 100 mA mA mA mA mA µVRMS 130 µA 3015fb 5 LT3015 Series ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25°C. PARAMETER CONDITIONS MIN TYP MAX UNITS ADJ Pin Bias Current (Notes 2, 7) LT3015: VIN = –2.3V –200 30 200 nA Shutdown Threshold (Note 11) VOUT = Off-to-On (Positive) VOUT = Off-to-On (Negative) VOUT = On-to-Off (Positive) VOUT = On-to-Off (Negative) l l l l 1.07 –1.34 0.5 1.21 –1.2 0.73 –0.73 1.35 –1.06 –0.5 V V V V SHDN Pin Current (Note 8) VSHDN = 0V VSHDN = 15V VSHDN = –15V l l l –1 0 17 –2.8 1 27 –4.5 µA µA µA Quiescent Current in Shutdown VIN = –6V, VSHDN = 0V l 0.01 6 µA Ripple Rejection VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = –1.5A LT3015-2.5: VIN = –4V (Avg) LT3015-3: VIN = –4.5V (Avg) LT3015-3.3: VIN = –4.8V (Avg) LT3015-5: VIN = –6.5V (Avg) LT3015-12: VIN = –13.5V (Avg) LT3015-15: VIN = –16.5V (Avg) LT3015: VIN = –2.5V (Avg) (Note 2) Current Limit (Note 14) VIN = –2.3V, VOUT = 0V LT3015-2.5/-3/-3.3/-5/-12/-15: VIN = VOUT(NOMINAL) – 1V, ∆VOUT = –5% LT3015: VIN = –2.3V, ∆VOUT = 0.1V l l l Input Reverse Leakage Current LT3015-2.5/-3/-3.3/-5/-12/-15: VIN = 30V, VOUT, VADJ, VSHDN = Open Circuit LT3015: VIN = 30V, VOUT, VADJ, VSHDN = Open Circuit 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: The LT3015 adjustable version is tested and specified for these conditions with the ADJ pin connected to the OUT pin. Note 3: Maximum junction temperature limits operating conditions. The regulated output voltage specification does not apply for all possible combinations of input voltage and output current, especially due to the current limit foldback which starts to decrease current limit at about |VIN – VOUT| = 8V. If operating at maximum output current, limit the input voltage range. If operating at maximum input voltage, limit the output current range. Note 4: To satisfy minimum input voltage requirements, the LT3015 is tested and specified for these conditions with an external resistor divider (54.9k top, 49.9k bottom) for an output voltage of –2.56V. The external resistor adds 25μA of DC load on the output. Note 5: Dropout voltage is the minimum input-to-output voltage differential needed to maintain regulation at a specified output current. In dropout, the output voltage is: VIN + VDROPOUT. Note 6: GND pin current is tested with VIN = VOUT(NOMINAL) and a current source load. Therefore, the device is tested while operating in dropout. This is the worst-case GND pin current. GND pin current decreases slightly at higher input voltages. Note 7: Positive ADJ pin bias current flows into the ADJ pin. dB dB dB dB dB dB dB 52 52 51 48 43 40 55 62 62 61 58 53 50 65 1.7 1.7 1.7 2 2 2 2.3 2.3 2.3 A A A l 4 5.5 mA l 1.55 1.7 mA Note 8: Positive SHDN pin current flows into the SHDN pin. Note 9: The LT3015 is tested and specified under pulsed load conditions such that TJ ≅ TA. The LT3015E is guaranteed to meet performance specifications from 0°C to 125°C junction temperature. Specifications over the –40°C to 125°C operating temperature range are assured by design, characterization, and correlation with statistical process controls. The LT3015I is guaranteed over the full –40°C to 125°C operating junction temperature range. The LT3015MP is 100% tested and guaranteed over the full –55°C to 125°C operating junction temperature range. Note 10: Parasitic diodes exist internally between the OUT, ADJ, SHDN pins and the IN pin. Do not drive the OUT, ADJ, and SHDN pins more that 0.3V below the IN pin during fault conditions, and these pins must remain at a voltage more positive than IN during normal operation. Note 11: The SHDN threshold must be met to ensure device operation. Note 12: For LT3015, the minimum input voltage refers to the lowest input voltage before the parts goes out of regulation. For the fixed voltage versions of LT3015, the minimum input voltage refers to the lowest input voltage before the part can no longer sink 1.5A; for proper regulation, the dropout voltage requirements must be met. Note 13: Sense pin current flows out of the pin. Note 14: The current limit circuit incorporates foldback that decreases current limit for |VIN – VOUT| ≥ 8V. Some level of output current is provided at all VIN – VOUT differential voltages. Please consult the Typical Performance Characteristics graph for Current Limit vs VIN – VOUT. 3015fb 6 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS Typical Dropout Voltage (DFN/MSOP) Guaranteed Dropout Voltage (DFN/MSOP) 450 450 250 200 150 125°C 25°C –40°C –55°C 100 50 0 TJ ≤ 125°C 400 300 TJ ≤ 25°C 200 0 –0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6 OUTPUT CURRENT (A) 200 150 50 –0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6 OUTPUT CURRENT (A) 125°C 25°C –40°C –55°C 100 Dropout Voltage (DD-PAK/TO-220) 600 500 400 TJ ≤ 25°C 300 200 0 400 300 IL = –0.5A 200 0 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) –0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6 OUTPUT CURRENT (A) 3015 G05 Quiescent Current 3015 G06 LT3015 ADJ Pin Voltage –1.244 LT3015-2.5/-3/-3.3/-5/-12/-15 –1.238 LT3015 LT3015-2.5 Output Voltage –2.55 VIN = –2.3V IL = –1mA –2.54 ADJ PIN VOLTAGE (V) –1.226 –1.220 –1.214 –1.208 –1.202 –0.2 VSHDN = 0V 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3015 G07 VIN = –3V IL = –1mA –2.53 –1.232 –0.8 VIN = –6V (LT3015/-2.5/-3/-3.3/-5) VIN = –16V (LT3015-12/-15) R = 120kΩ, IL = –10µA (LT3015) –0.6 RL = ∞, I = –0µA L L (LT3015-2.5/-3/-3.3/-5/-12/-15) –0.4 IL = –0.1A IL = –1mA = TEST POINTS 3015 G04 –1.0 IL = –1.5A 100 100 –0.2 –0.4 –0.6 –0.8 –1 –1.2 –1.4 –1.6 OUTPUT CURRENT (A) 500 TJ ≤ 125°C 600 OUTPUT VOLTAGE (V) 0 IL = –1mA 3015 G03 DROPOUT VOLTAGE (mV) 200 DROPOUT VOLTAGE (mV) 300 IL = –0.1A 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 700 400 IL = –0.5A 100 800 500 DROPOUT VOLTAGE (mV) 250 Guaranteed Dropout Voltage (DD-PAK/TO-220) 600 QUIESCENT CURRENT (mA) 300 = TEST POINTS 0 IL = –1.5A 3015 G02 Typical Dropout Voltage (DD-PAK/TO-220) –1.2 350 100 3015 G01 –1.4 400 DROPOUT VOLTAGE (mV) 300 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 500 500 350 0 Dropout Voltage (DFN/MSOP) 600 400 0 TA = 25°C, unless otherwise noted. –2.52 –2.51 –2.50 –2.49 –2.48 –2.47 –1.196 –2.46 –1.192 –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) 3015 G09 3015 G08 3015fb 7 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS LT3015-3 Output Voltage LT3015-3.3 Output Voltage –3.366 VIN = –3.5V IL = –1mA –3.048 –3.342 OUTPUT VOLTAGE (V) –3.012 –3.000 –2.988 –2.976 –5.06 –3.330 –3.318 –3.306 –3.294 –3.282 –3.270 –5.04 –5.02 –5.00 –4.98 –4.96 –4.94 –2.964 –3.258 –2.952 –3.246 –4.92 –2.940 –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) –4.90 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3015 G10 LT3015-15 Output Voltage –15.30 –15.15 –15.10 –15.05 –15.00 –14.95 –14.90 –14.85 –14.80 0 LT3015-3 Quiescent Current VSHDN = VIN –0.8 –0.4 –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) 3015 G16 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 INPUT VOLTAGE (V) LT3015-3.3 Quiescent Current –2.4 TJ = 25°C –2.1 VOUT = –3V RL = ∞ –1.8 –1.5 VSHDN = VIN –1.2 –0.9 –0.6 –0.3 VSHDN = 0V VSHDN = 0V 3015 G15 –2.4 –1.6 TJ = 25°C VOUT = –1.22V RL = 121kΩ –0.4 3015 G14 QUIESCENT CURRENT (mA) QUIESCENT CURRENT (mA) –0.6 –0.2 –14.70 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) LT3015-2.5 Quiescent Current 0 –0.8 –14.75 –2.4 TJ = 25°C VOUT = –2.5V –2.0 RL = ∞ VSHDN = VIN –1.0 QUIESCENT CURRENT (mA) –15.20 3015 G13 0 LT3015 Quiescent Current –1.2 VIN = –15.5V IL = –1mA –15.25 OUTPUT VOLTAGE (V) –12.24 VIN = –12.5V –12.20 IL = –1mA –12.16 –12.12 –12.08 –12.04 –12.02 –12.00 –11.96 –11.92 –11.88 –11.84 –11.80 –11.76 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) –1.2 3015 G12 3015 G11 LT3015-12 Output Voltage OUTPUT VOLTAGE (V) VIN = –5.5V IL = –1mA –5.08 QUIESCENT CURRENT (mA) OUTPUT VOLTAGE (V) –3.024 VIN = –3.8V IL = –1mA –3.354 –3.036 LT3015-5 Output Voltage –5.10 OUTPUT VOLTAGE (V) –3.060 TA = 25°C, unless otherwise noted. 0 –1.8 –1.5 VSHDN = VIN –1.2 –0.9 –0.6 –0.3 VSHDN = 0V 0 TJ = 25°C –2.1 VOUT = –3.3V RL = ∞ –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) 3015 G17 0 VSHDN = 0V 0 –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) 3015 G18 3015fb 8 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS LT3015-12 Quiescent Current LT3015-5 Quiescent Current –1.8 VSHDN = VIN –0.9 –0.6 –0.3 –1.5 VSHDN = VIN –1.2 –0.9 –0.6 –0.3 VSHDN = 0V 0 –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) 0 –10 RL = 2.4Ω IL = –0.5A* RL = 12Ω IL = –0.1A* –5 0 0 RL = 1.2kΩ IL = –1mA* –40 –35 –30 RL = 25Ω IL = –0.1A* –25 –20 –15 RL = 5Ω IL = –0.5A* –10 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 INPUT VOLTAGE (V) RL = 2.5kΩ IL = –1mA* –30 RL = 33Ω IL = –0.1A* –25 –20 –15 RL = 6.6Ω IL = –0.5A* –10 RL = 3.3kΩ IL = –1mA* 0 –40 –35 –20 –15 RL = 6Ω IL = –0.5A* RL = 3kΩ IL = –1mA* 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 INPUT VOLTAGE (V) 3015 G24 LT3015-12 GND Pin Current –35 –30 RL = 3.33Ω IL = –1.5A* –25 RL = 50Ω IL = –0.1A* –20 RL = 10Ω IL = –0.5A* –15 –10 –5 0 3015 G25 RL = 30Ω IL = –0.1A* –25 0 –50 TJ = 25°C VSHDN = VIN *FOR VOUT = –5V –40 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 INPUT VOLTAGE (V) RL = 2Ω IL = –1.5A* –30 –10 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 INPUT VOLTAGE (V) –45 –5 0 TJ = 25°C VSHDN = VIN *FOR VOUT = –3V –45 LT3015-5 GND Pin Current RL = 2.2Ω IL = –1.5A* –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) –5 –50 GND PIN CURRENT (mA) GND PIN CURRENT (mA) –35 0 3015 G23 TJ = 25°C VSHDN = VIN *FOR VOUT = –3.3V –40 VSHDN = 0V –50 –5 LT3015-3.3 GND Pin Current –45 –0.6 LT3015-3 GND Pin Current RL = 1.67Ω IL = –1.5A* 3015 G22 –50 –0.9 3015 G21 TJ = 25°C VSHDN = VIN *FOR VOUT = –2.5V –45 GND PIN CURRENT (mA) GND PIN CURRENT (mA) RL = 0.81Ω IL = –1.5A* VSHDN = VIN –1.2 LT3015-2.5 GND Pin Current –50 TJ = 25°C VSHDN = VIN *FOR VOUT = –1.22V –15 –1.5 3015 G20 LT3015 GND Pin Current –20 –1.8 0 –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) 3015 G19 –25 TJ = 25°C –2.1 VOUT = –15V RL = ∞ –0.3 VSHDN = 0V GND PIN CURRENT (mA) –1.2 –1.8 RL = 5kΩ IL = –1mA* TJ = 25°C VSHDN = VIN *FOR VOUT = –12V –45 GND PIN CURRENT (mA) –1.5 TJ = 25°C –2.1 VOUT = –12V RL = ∞ QUIESCENT CURRENT (mA) TJ = 25°C –2.1 VOUT = –5V RL = ∞ 0 LT3015-15 Quiescent Current –2.4 –2.4 QUIESCENT CURRENT (mA) QUIESCENT CURRENT (mA) –2.4 0 TA = 25°C, unless otherwise noted. –40 –35 RL = 8Ω IL = –1.5A* –30 –25 RL = 120Ω IL = –0.1A* –20 –15 –10 RL = 12kΩ IL = –1mA* RL = 24Ω IL = –0.5A* –5 0 –1 –2 –3 –4 –5 –6 –7 –8 –9 –10 INPUT VOLTAGE (V) 3015 G26 0 0 –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 INPUT VOLTAGE (V) 3015 G27 3015fb 9 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C VSHDN = VIN *FOR VOUT = –15V –40 –35 RL = 10Ω IL = –1.5A* –30 –25 RL = 150Ω IL = –0.1A* –20 RL = 15kΩ IL = –1mA* –15 –10 RL = 30Ω IL = –0.5A* 0 TJ = –55°C –25 TJ = –40°C –20 –15 –10 TJ = 25°C TJ = 125°C 0 0.0 –0.2 –0.4 –0.6 –0.8 –1.0 –1.2 –1.4 –1.6 OUTPUT CURRENT (A) –2 –4 –6 –8 –10 –12 –14 –16 –18 –20 INPUT VOLTAGE (V) 20 TURN OFF THRESHOLD –0.6 –0.4 –0.2 VIN = –2.3V 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 0.2 VIN = –2.3V 0.0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 21 10 5 0 125°C 25°C –55°C 18 15 9 6 3 0 3015 G33 ADJ Pin Bias Current Line Regulation VIN = –2.3V POSITIVE CURRENT FLOWS INTO THE PIN –200 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3015 G34 –20.0 –17.5 70 LINE REGULATION (mV) –100 ADJ PIN BIAS CURRENT (nA) 150 –50 VSHDN = –15V –6 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 80 0 VSHDN = 15V 3015 G32 ADJ Pin Bias Current 50 VIN = –15V POSITIVE CURRENT FLOWS INTO THE PIN 12 –3 –10 –30 –25 –20 –15 –10 –5 0 5 10 15 20 25 SHDN PIN VOLTAGE (V) 200 ADJ PIN BIAS CURRENT (nA) 0.4 SHDN Pin Input Current 15 3015 G31 100 TURN OFF THRESHOLD 0.6 24 VIN = –30V POSITIVE CURRENT FLOWS INTO THE PIN –5 –150 0.8 3015 G30 SHDN PIN CURRENT (µA) TURN ON THRESHOLD SHDN PIN CURRENT (µA) NEGATIVE SHDN PIN THRESHOLD (V) 25 –0.8 1.0 SHDN Pin Input Current Negative SHDN Pin Thresholds –1.4 –1.0 TURN ON THRESHOLD 1.2 3015 G29 3015 G28 –1.2 Positive SHDN Pin Thresholds 1.4 VIN = –2.3V VOUT = –1.22V –5 –5 0 GND Pin Current vs ILOAD –30 GND PIN CURRENT (mA) –45 GND PIN CURRENT (mA) –35 POSITIVE SHDN PIN THRESHOLD (V) LT3015-15 GND Pin Current –50 TA = 25°C, unless otherwise noted. 60 50 40 TJ = 25°C POSITIVE CURRENT FLOWS INTO THE PIN 30 20 0 –3 –6 –9 –12 –15 –18 –21 –24 –27 –30 INPUT VOLTAGE (V) 3015 G35 –15.0 LT3015 LT3015-2.5 LT3015-3 LT3015-3.3 LT3015-5 LT3015-12 LT3015-15 –12.5 –10.0 –7.5 –5.0 –2.5 0.0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) ∆VIN = VOUT(NOMINAL) –0.5V TO –30V (LT3015-2.5/-3/-3.3/-5/-12/-15) ∆VIN = –2.3V TO –30V (LT3015) IL = –1mA 3015 G36 3015fb 10 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS Load Regulation LT3015-5 LT3015-12 LT3015-15 –1.8 –40 –30 –20 –1.6 –1.4 –1.2 –1.0 –0.8 –0.6 0.0 LT3015 Input Ripple Rejection 0 –5 –10 –15 –20 –25 INPUT/OUTPUT DIFFERENTIAL (V) COUT = 47µF –0.8 –0.6 RIPPLE REJECTION (dB) 40 30 20 10M 40 30 20 TJ = 25°C I = –1.5A 10 L VOUT = –5V VIN = –6.5V + 50VRMS RIPPLE 0 100 1k 10k 100k 10 FREQUENCY (Hz) 3015 G39 70 60 50 40 30 20 10 1M 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 10M 3015 G42 RMS Output Noise vs Load Current –1.4 –1.2 –1.0 –0.8 –0.6 –0.4 –0.2 V SHDN = VIN 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) 3015 G43 10 LT3015 LT3015-2.5 LT3015-5 VOUT = –5V CFF = 0 1 VOUT = –5V CFF = 10nF 100 1k 10k FREQUENCY (Hz) COUT = 10µF IL = –1.5A IFB-DIVIDER = 100µA COUT = 10µF 500 f = 10Hz TO 100kHz 450 IFB-DIVIDER = 100µA 400 LT3015-15 LT3015-12 350 300 250 200 150 LT3015-2.5 100 VOUT = –1.22V 0.1 10 550 LT3015-12 LT3015-15 OUTPUT NOISE (µVRMS) IL = –1.5A OUTPUT NOISE SPECTRAL DENSITY (µV/√Hz) Output Noise Spectral Density –2.0 IL = –1.5A VOUT = –1.22V VIN = –2.7V + 0.5VP-P RIPPLE AT f = 120Hz 3015 G41 Minimum Input Voltage –2.2 VIN = –2.3V VOUT = 0V Ripple Rejection vs Temperature 50 3015 G40 MINIMUM INPUT VOLTAGE (V) –1.0 0.0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) –30 COUT = 47µF, CFF = 10nF COUT = 10µF, CFF = 10nF COUT = 10µF, CFF = 0 60 50 IL = –1mA –1.2 LT3015 Input Ripple Rejection 70 COUT = 10µF TJ = 25°C IL = –1.5A 10 V OUT = –1.22V VIN = –2.7V + 50VRMS RIPPLE 0 100 1k 10k 100k 1M 10 FREQUENCY (Hz) –1.4 3015 G38 70 60 –1.6 –0.2 VOUT = 0V 3015 G37 VIN = VOUT(NOMINAL) –1V (LT3015-2.5/-3/-3.3/-5/-12/-15) VIN = –2.3V (LT3015) ∆IL = –1mA TO –1.5A –1.6 –1.8 –0.4 –0.2 0 –75 –50 –25 0 25 50 75 100 125 150 175 TEMPERATURE (°C) –1.8 –2.0 –0.4 –10 RIPPLE REJECTION (dB) 125°C 25°C –55°C –2.0 –50 Current Limit vs Temperature –2.2 CURRENT LIMIT (A) –60 LT3015 LT3015-2.5 LT3015-3 LT3015-3.3 Current Limit vs VIN –VOUT RIPPLE REJECTION (dB) LOAD REGULATION (mV) –70 –2.2 CURRENT LIMIT (A) –80 TA = 25°C, unless otherwise noted. 50 100k 3015 G44 0 –1m –10m –100m LOAD CURRENT (A) –1 3015 G45 NOISE AT VOUT = –1.22V NOISE AT VOUT = –5V, CFF = 0 NOISE AT VOUT = –5V, CFF = 100pF NOISE AT VOUT = –5V, CFF = 1nF NOISE AT VOUT = –5V, CFF = 10nF 3015fb 11 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS 250 LT3015 10Hz to 100kHz Output Noise RMS Output Noise vs Feedforward Capacitor (CFF) LT3015 10Hz to 100kHz Output Noise, CFF = 0 IL = –1.5A COUT = 10µF f = 10Hz TO 100kHz IFB-DIVIDER = 100µA TJ = 25°C 225 200 OUTPUT NOISE (µVRMS) TA = 25°C, unless otherwise noted. 175 150 VOUT 200µV/DIV VOUT 100µV/DIV 125 100 VOUT = –5V 75 VOUT = –1.22V 50 25 0 10p 100p 1n 10n 100n FEEDFORWARD CAPACITANCE, CFF (F) COUT = 10µF VOUT = –1.22V IL = –1.5A 1µ 3015 G46 3015 G47 1ms/DIV COUT = 10µF VOUT = –5V IL = –1.5A CFF = 0 SHDN Transient Response, IL = –5mA, CFF = 0 LT3015 10Hz to 100kHz Output Noise, CFF = 10nF 1ms/DIV 3015 G48 SHDN Transient Response, IL = –1.5A, CFF = 0 VSHDN 1V/DIV VSHDN 1V/DIV VOUT 200µV/DIV VOUT 2V/DIV RL = 3.3Ω VOUT 2V/DIV RL = 1kΩ COUT = 10µF VOUT = –5V IL = –1.5A CFF = 10nF 1ms/DIV 3015 G49 COUT = 10µF VOUT = –5V CFF = 0 SHDN Transient Response, IL = –1.5A, CFF = 10nF 100 START-UP TIME (mS) VOUT 2V/DIV RL = 3.3Ω 250µs/DIV 3015 G52 250µs/DIV 3015 G51 LT3015 Transient Response, COUT = 10µF VOUT = –12V VOUT 100mV/DIV VOUT = –15V 1.0 VOUT = –5V 0.1 0.01 COUT = 10µF VOUT = –5V CFF = 10nF COUT = 10µF VOUT = –5V CFF = 0 Start-Up Time vs CFF IL = –1.5A IFB-DIVIDER = 100µA 10 TJ = 25°C VSHDN 1V/DIV 3015 G50 25ms/DIV IOUT 1A/DIV VOUT = –3V VOUT = –1.22V 0.001 100p 1n 10n FEEDFORWARD CAPACITOR, CFF (F) 100n 3015 G53 COUT = 10µF 25µs/DIV VOUT = –1.22V VIN = –3V ∆IOUT = –50mA TO –1.5A 3015 G54 3015fb 12 LT3015 Series TYPICAL PERFORMANCE CHARACTERISTICS LT3015 Transient Response, COUT = 47µF TA = 25°C, unless otherwise noted. LT3015 Transient Response, CFF = 0, COUT = 10µF VOUT 100mV/DIV VOUT 100mV/DIV IOUT 1A/DIV IOUT 1A/DIV COUT = 47µF 25µs/DIV VOUT = –1.22V VIN = –3V ∆IOUT = –50mA TO –1.5A 3015 G55 COUT = 10µF 25µs/DIV VOUT = –5V VIN = –6.5V CFF = 0 IFB-DIVIDER = 100µA ∆IOUT = –50mA TO –1.5A LT3015 Transient Response, CFF = 10nF, COUT = 10µF 3015 G56 LT3015 Transient Response, CFF = 10nF, COUT = 47µF VOUT 100mV/DIV VOUT 100mV/DIV IOUT 1A/DIV IOUT 1A/DIV COUT = 10µF 25µs/DIV VOUT = –5V VIN = –6.5V CFF = 10nF IFB-DIVIDER = 100µA ∆IOUT = –50mA TO –1.5A 3015 G57 COUT = 47µF 25µs/DIV VOUT = –5V VIN = –6.5V CFF = 10nF IFB-DIVIDER = 100µA ∆IOUT = –50mA TO –1.5A 3015 G58 3015fb 13 LT3015 Series PIN FUNCTIONS (DFN/MSOP/Q/T) IN (Pins 1, 2, Exposed Pad Pin 9 / 1, 2, 3, 4, Exposed Pad Pin 13 / 3, Tab / 3, Tab ): Input. These pins supply power to the regulator. The Tab of the DD-Pak, TO-220 and the exposed backside pad of the DFN and MSOP packages is an electrical connection to IN and to the device’s substrate. For proper electrical and thermal performance, tie all IN pins together and tie IN to the exposed backside or Tab of the relevant package on the PCB. See the Applications Information Section for thermal considerations and calculating junction temperature. The LT3015 requires a bypass capacitor at IN. In general, a battery’s output impedance rises with frequency, so include a bypass capacitor in battery powered applications. An input bypass capacitor in the range of 1µF to 10µF generally suffices, but applications with large load transients may require higher input capacitance to prevent input supply droop and prevent the regulator from entering dropout. SHDN (Pin 3 / 5 / 1 / 1): Shutdown. Use the SHDN pin to put the LT3015 into a micropower shutdown state. The SHDN function is bi-directional, allowing use of either positive or negative logic. The SHDN pin threshold voltages are referenced to GND. The output of the LT3015 is OFF if the SHDN pin is pulled typically within ±0.73V of GND. Driving the SHDN pin typically more than ±1.21V turns the LT3015 ON. Drive the SHDN pin with either a logic gate or with open collector/drain logic using a pull-up resistor. The resistor supplies the pull-up current of the open collector/drain gate, typically several microamperes. The typical SHDN pin current is 2.8µA out of the pin (for negative logic) or 17µA into the pin (for positive logic). If the SHDN function is unused, connect the SHDN pin to VIN to turn the device ON. If the SHDN pin is floated, then the LT3015 is OFF. A parasitic diode exists between SHDN and IN of the LT3015. Therefore, do not drive the SHDN pin more than 0.3V below IN during normal operation or during a fault condition. The SHDN pin can also be used to set a programmable undervoltage lockout (UVLO) threshold for the regulator input supply. GND (Pins 4, 5 / 6, 7 / 2 / 2): Ground. Tie all GND pin(s) together and tie the bottom of the output voltage setting resistor divider directly to the GND pin(s) for optimum load regulation performance. ADJ (Pin 6 / 8 / 4 / 4): Adjust. For the adjustable voltage version, this pin is the error amplifier’s non-inverting input. It has a typical bias current of 30nA that flows into the pin. The ADJ pin reference voltage is –1.22V referred to GND, and the output voltage range is –1.22V to –29.5V. A parasitic substrate diode exists between ADJ and IN of the LT3015. Therefore, do not drive ADJ more than 0.3V below IN during normal operation or during a fault condition. SENSE (Pin 6 / 8 / 4 / 4): Sense. For the fixed voltage versions of the LT3015 (LT3015-2.5/LT3015-3/LT3015-3.3/ LT3015-5/LT3015-12/LT3015-15), the SENSE pin connects to the non-inverting input of the error amplifier through an internal resistor divider network. Optimum regulation is obtained when the SENSE pin is connected to the OUT pin of the regulator. In critical applications, small voltage drops are caused by the resistance (RP) of PCB traces between the regulator and the load. These drops can be eliminated by connecting the SENSE pin to the output at the load as shown in Figure 1 (Kelvin Sense Connection). Note that the voltage drop across the external PCB traces will add to the dropout voltage of the regulator. The SENSE pin bias current is 100µA at the nominal output voltage. A parasitic diode exists between SENSE and IN of the LT3015. Therefore, do not drive SENSE more than 0.3V below IN during normal operation or during a fault condition. OUT (Pins 7, 8 / 9, 10, 11, 12 / 5 / 5): Output. These pins supply power to the load. Tie all OUT pins together for best performance. Use a minimum output capacitor of 10µF with an ESR less than 500mΩ to prevent oscillations. Large load transient applications require larger output capacitors to limit peak voltage transients. See the Applications Information section for more information on output capacitance. A parasitic substrate diode exists between OUT and IN of the LT3015. Therefore, do not drive OUT more than 0.3V below IN during normal operation or during a fault condition. RP GND LT3015-XX VIN SHDN IN LOAD SENSE OUT RP 3015 F01 Figure 1. Kelvin Sense Connection 3015fb 14 LT3015 Series BLOCK DIAGRAM SENSE *SEE TABLE 1 FOR NOMINAL VALUES OF R1 AND R2 1.21V OUT ADJ R2* – VREF _ ERROR AMP R1* + + QPOWER NPN DRIVER SHDN BIAS CIRCUITRY + – I LIMIT AMP RSNS – + VTH + – –1.20V ADJ PIN BIAS CURRENT COMPENSATION GND I LIMIT FOLDBACK IN 3015 BD APPLICATIONS INFORMATION The LT3015 series are 1.5A negative low dropout linear regulators featuring precision current limit and precision bi-directional shutdown. The device supplies up to 1.5A of output load current at a typical dropout voltage of 310mV. Moreover, the low 1.1mA operating quiescent current drops to less than 1µA in shutdown. In addition to low quiescent current, the LT3015 incorporates several protection features that make it ideal for battery powered applications. In dual supply applications where the regulator’s load is returned to a positive supply, OUT can be pulled above GND by 30V and still allow the LT3015 to start up and operate. Adjustable Operation The LT3015 adjustable version has an output voltage range of –1.22V to –29.3V. Output voltage is set by the ratio of two external resistors as shown in Figure 2. The device regulates the output to maintain the ADJ pin voltage to –1.22V referred to ground. The current in R1 equals –1.22V/R1 and the current in R2 equals the current in R1 plus the ADJ pin bias current. The ADJ pin bias current, 30nA at 25°C, flows into the ADJ pin. Calculate the output voltage using the formula shown in Figure 1. The value of R1 should be less than 50k to minimize errors in the output voltage created by the ADJ pin bias current. Note that in shutdown, the output is off and the divider current GND CIN VIN R1 LT3015 SHDN COUT ADJ R2 IN OUT VOUT 3015 F02 VOUT R2 = –1.22V 1+ + (IADJ ) (R2) R1 VADJ = –1.22V AND IADJ = 30nA AT 25°C OUTPUT RANGE = –1.22 TO – 29.5V Figure 2. Adjustable Operation is zero. Curves of ADJ Pin Voltage vs Temperature, ADJ Pin Bias Current vs Temperature and ADJ Pin Bias Current vs Input Voltage appear in the Typical Performance Characteristics section. The adjustable device is tested and specified with the ADJ pin tied to the OUT pin for a –1.22V output voltage. Specifications for output voltages greater than –1.22V are proportional to the ratio of the desired VOUT to –1.22V (VOUT/–1.22V). For example, load regulation for an output current change of –1mA to –1.5A is typically 2mV at VOUT = –1.22V. At VOUT = –5V, load regulation equals: (–5V/–1.22V) • (2mV) = 8.2mV 3015fb 15 LT3015 Series APPLICATIONS INFORMATION Table 1 shows 1% resistor divider values for some common output voltages with a resistor divider current of approximately 100µA. to –1.22V output voltage performance regardless of the chosen output voltage (see Transient Response and Output Noise in the Typical Performance Characteristics section). Table 1. Output Voltage Resistor Divider Values R1 VOUT (V) (kΩ) It is important to note that the start-up time is affected by the use of a feedforward capacitor. 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. In particular, it slows to 860µs with a 10nF feedforward capacitor and a 10µF output capacitor for an output voltage set to –5V by a 100µA feedback resistor divider current. R2 (kΩ) –2.5 12.1 12.7 –3.0 12.1 17.8 –3.3 12.1 20.5 –5.0 12.1 37.4 –12.0 12.1 107 –15.0 12.4 140 GND Feedforward Capacitance: Output Voltage Noise, Transient Performance, and PSRR The LT3015 regulators provide low output voltage noise over the 10Hz to 100kHz bandwidth while operating at full load current. Output voltage noise is approximately 240nV/√Hz over this frequency while operating in unity-gain configuration. For higher output voltages (using a resistor divider), the output voltage noise gains up accordingly. To lower the output voltage noise for higher output voltages, include a feedforward capacitor (CFF) from VOUT to VADJ. A good quality, low leakage, capacitor is recommended. This capacitor bypasses the resistor divider network at high frequencies; and hence, reduces the output noise. With the use of a 10nF feedforward capacitor, the output noise decreases from 220µVRMS to 70µVRMS when the output voltage is set to –5V by a 100µA feedback resistor divider. Higher values of output voltage noise are often measured if care is not exercised with regard to circuit layout and testing. Crosstalk from nearby traces induces unwanted noise onto the LT3015’s output. Moreover, power supply ripple rejection (PSRR) must also be considered, as the LT3015 does not exhibit unlimited PSRR; and thus, a small portion of the input noise propagates to the output. Using a feedforward capacitor (CFF) from VOUT to VADJ has the added benefit of improving transient response and PSRR for output voltages greater than –1.22V. With no feedforward capacitor, the response and settling times will increase as the output voltage is raised above –1.22V. Use the equation in Figure 3 to determine the minimum value of CFF to achieve a transient (and noise) performance that is similar CIN SHDN ADJ VIN R2 IN COUT R1 LT3015 CFF OUT VOUT 3015 F03 CFF ≥ 10nF/100µA • IFB-DIVIDER IFB-DIVIDER = VOUT/(R1+R2) Figure 3. Feedforward Capacitor for Fast Transient Response, Low Noise, and High PSRR Output Capacitance and Transient Performance The LT3015 regulators are 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 10µF with an ESR of 500mΩ or less to prevent oscillations. The LT3015’s 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. Extra consideration must be given to the use of ceramic capacitors. Ceramic capacitors are manufactured with a variety of dielectrics, each with different behavior across temperature and applied voltage. The most common dielectrics used are specified with EIA temperature characteristic codes of Z5U, Y5V, X5R, and X7R. The Z5U and Y5V dielectrics are good for providing high capacitances in a small package, but they tend to have strong voltage and temperature coefficients as shown in Figures 4 and 5. 3015fb 16 LT3015 Series APPLICATIONS INFORMATION When used with a 5V regulator, a 16V 10μF Y5V capacitor can exhibit an effective value as low as 1μF to 2μF for the DC bias voltage applied and over the operating temperature range. The X5R and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor. The X7R type has better stability across temperature, 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 in situ for all applications. 20 CHANGE IN VALUE (%) VOUT 1mV/DIV BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF 0 X5R VOUT = –1.3V COUT = 10µF IL = 10µA –20 –40 1ms/DIV 3015 F06 Figure 6. Noise Resulting from Tapping on a Ceramic Capacitor –60 Y5V Overload Recovery –80 –100 0 2 4 16 14 6 12 8 10 DC BIAS VOLTAGE (V) 3015 F04 Figure 4. Ceramic Capacitor DC Bias Characteristics 40 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF 20 CHANGE IN VALUE (%) 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 microphone works. For a ceramic capacitor, the stress can be induced by vibrations in the system or thermal transients. The resulting voltages produced can cause appreciable amounts of noise. A ceramic capacitor produced the trace in Figure 6 in response to light tapping from a pencil. Similar vibration induced behavior can masquerade as increased output voltage noise. X5R 0 –20 –40 Y5V –60 –80 –100 –50 –25 0 25 75 50 TEMPERATURE (°C) 100 125 3015 F05 Figure 5. Ceramic Capacitor Temperature Characteristics Like many IC power regulators, the LT3015 has safe operating area protection. The safe operating area protection activates at IN-to-OUT differential voltages greater than 8V. The safe area protection decreases current limit as the IN-to-OUT differential voltage increases and keeps the power transistor inside a safe operating region for all values of forward input-to-output voltage up to the LT3015’s Absolute Maximum Ratings. When power is first applied and input voltage rises, the output follows the input and keeps the IN-to-OUT differential voltage small, allowing the regulator to supply large output currents and start-up into high current loads. With a high input voltage, a problem can occur wherein removal of an output short does not allow the output voltage to fully recover. Other LTC negative linear regulators such as the LT1175 and LT1964 also exhibit this phenomenon, so it is not unique to the LT3015. 3015fb 17 LT3015 Series APPLICATIONS INFORMATION The problem occurs with a heavy output load when input voltage is high and output voltage is low. Such situations occur easily after the removal of a short-circuit or if the shutdown pin is pulled high after the input voltage has already been turned on. The load line for such a load intersects the output current curve at two points. If this happens, the regulator has two stable output operating points. With this double intersection, the input power supply may need to be cycled down to zero and brought up again to make the output recover. Shutdown/UVLO The SHDN pin is used to put the LT3015 into a micropower shutdown state. The LT3015 has an accurate –1.20V threshold (during turn-on) on the SHDN pin. This threshold can be used in conjunction with a resistor divider from the system input supply to define an accurate undervoltage lockout (UVLO) threshold for the regulator. The SHDN pin current (at the threshold) needs to be considered when determining the resistor divider network. Thermal Considerations The LT3015’s maximum rated junction temperature of 125°C limits its power handling capability. Two components comprise the power dissipated by the device: 1.Output current multiplied by the input-to-output differential voltage: IOUT • (VIN - VOUT) and 2.GND pin current multiplied by the input voltage: IGND • VIN Determine GND pin current using the GND Pin Current curves in the Typical Performance Characteristics sec tion. Total power dissipation is the sum of the above two components. The LT3015 regulators incorporate a thermal shutdown circuit designed to protect the device during overload conditions. The typical thermal shutdown temperature is 165°C and the circuit incorporates about 8°C of hysteresis. For continuous normal conditions, do not exceed the maximum junction temperature rating of 125°C. Carefully consider all sources of thermal resistance from junction to ambient, including other heat sources mounted in close proximity to the LT3015. The undersides of the DFN and MSOP packages have ex posed metal from the lead frame to the die attachment. Both packages allow heat to directly transfer from the die junction to the printed circuit board metal to control maximum operating junction temperature. The dual-in-line pin arrangement allows metal to extend beyond the ends of the package on the topside (component side) of the PCB. Connect this metal to IN on the PCB. The multiple IN and OUT pins of the LT3015 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 can also be used to spread the heat generated by power devices. Tables 2-4 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 top/bottom external trace planes with a total board thickness of 1.6mm. The four layers were electrically isolated with no thermal vias present. PCB layers, copper weight, board layout and thermal vias will affect the resultant thermal resistance. For more information on thermal resistance and high thermal conductivity test boards, refer to JEDEC standard JESD51, notably JESD51-12 and JESD51-7. Achieving low thermal resistance necessitates attention to detail and careful PCB layout. 3015fb 18 LT3015 Series APPLICATIONS INFORMATION Table 2. Measured Thermal Resistance for DFN Package COPPER AREA TOP SIDE* BACKSIDE BOARD AREA THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 2500mm2 2500mm2 2500mm2 40°C/W 1000mm2 2500mm2 2500mm2 40°C/W 225mm2 2500mm2 2500mm2 41°C/W 100mm2 2500mm2 2500mm2 42°C/W *Device is mounted on topside P = –500mA(–3.465V + 2.5V) + –6.5mA • (–3.465V) = 0.505W Using a DFN package, the thermal resistance is in the range of 40°C/W to 42°C/W depending on the copper area. Therefore, the junction temperature rise above ambient approximately equals: 0.505W • 41°C/W = 20.7°C Table 3. Measured Thermal Resistance for MSOP Package COPPER AREA Thus: The maximum junction temperature equals the maximum ambient temperature plus the maximum junction temperature rise above ambient or: TOP SIDE* BACKSIDE BOARD AREA THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 2500mm2 2500mm2 2500mm2 37°C/W 1000mm2 2500mm2 2500mm2 37°C/W 225mm2 2500mm2 2500mm2 38°C/W Protection Features 100mm2 2500mm2 2500mm2 40°C/W The LT3015 incorporates several protection features that make it ideal for use in battery-powered applications. In addition to the normal protection features associated with monolithic regulators, such as current limiting and thermal limiting, the device protects itself against reverse input voltages and reverse output voltages. *Device is mounted on topside Table 4. Measured Thermal Resistance for DD-Pak Package COPPER AREA TOP SIDE* BACKSIDE BOARD AREA THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 2500mm2 2500mm2 2500mm2 14°C/W 1000mm2 2500mm2 2500mm2 16°C/W 225mm2 2500mm2 2500mm2 19°C/W *Device is mounted on topside T Package, 5-Lead TO-220 Thermal Resistance (Junction-to-Case) = 3°C/W Calculating Junction Temperature Example: Given an output voltage of –2.5V, an input voltage range of –3.3V ± 5%, an output current range of 1mA to 500mA, and a maximum ambient temperature of 85°C, what is the maximum junction temperature? TJMAX = 85°C + 20.7°C = 105.7°C Precision current limit and thermal overload protections are intended to protect the LT3015 against current overload conditions at the output of the device. For normal operation, do not allow the the junction temperature to exceed 125°C. Pulling the LT3015’s output above ground induces no damage to the part. If IN is left open circuit or grounded, OUT can be pulled above GND by 30V. In addition, OUT acts like an open circuit, i.e. no current flows into the pin. If IN is powered by a voltage source, OUT sinks the LT3105’s short-circuit current and protects itself by thermal limiting. In this case, grounding the SHDN pin turns off the device and stops OUT from sinking the short-circuit current. The power dissipated by the LT3015 equals: IOUT(MAX) • (VIN(MAX) - VOUT) + IGND • (VIN(MAX)) where: IOUT(MAX) = –500mA VIN(MAX) = –3.465V IGND at (IOUT = –500mA, VIN = –3.465V) = –6.5mA 3015fb 19 LT3015 Series TYPICAL APPLICATIONS Adjustable Current Sink R1 2k C1 10µF LT1004-1.2 R3 2k VIN < –2.3V R8 100k GND R2 82.5k C2 10µF LT3015 R4 0.01Ω R5 2.2k SHDN ADJ IN OUT R6 2.2k C3 1µF 2 3 – + R7 475Ω 8 1/2 LT1350 C4 3.3µF RLOAD 1 4 3015 TA04 NOTE: ADJUST R3 FOR 0 TO –1.5A CONSTANT CURRENT 3015fb 20 LT3015 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. DD Package 8-Lead Plastic DFN (3mm × 3mm) (Reference LTC DWG # 05-08-1698 Rev C) 0.70 ±0.05 3.5 ±0.05 1.65 ±0.05 2.10 ±0.05 (2 SIDES) PACKAGE OUTLINE 0.25 ±0.05 0.50 BSC 2.38 ±0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (NOTE 6) 0.200 REF 3.00 ±0.10 (4 SIDES) R = 0.125 TYP 5 0.40 ±0.10 8 1.65 ±0.10 (2 SIDES) 0.75 ±0.05 4 0.25 ±0.05 1 (DD8) DFN 0509 REV C 0.50 BSC 2.38 ±0.10 0.00 – 0.05 BOTTOM VIEW—EXPOSED PAD NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WEED-1) 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 TOP AND BOTTOM OF PACKAGE 3015fb 21 LT3015 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. MSE Package 12-Lead Plastic MSOP, Exposed Die Pad (Reference LTC DWG # 05-08-1666 Rev F) BOTTOM VIEW OF EXPOSED PAD OPTION 2.845 ±0.102 (.112 ±.004) 5.23 (.206) 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 NOTE: (.0256) 1. DIMENSIONS IN MILLIMETER/(INCH) BSC 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) 0911 REV F 3015fb 22 LT3015 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. Q Package 5-Lead Plastic DD Pak (Reference LTC DWG # 05-08-1461 Rev F) .256 (6.502) .060 (1.524) TYP .060 (1.524) .390 – .415 (9.906 – 10.541) .165 – .180 (4.191 – 4.572) .045 – .055 (1.143 – 1.397) 15° TYP .060 (1.524) .183 (4.648) +.008 .004 –.004 +0.203 0.102 –0.102 .059 (1.499) TYP .330 – .370 (8.382 – 9.398) ( ) .095 – .115 (2.413 – 2.921) .075 (1.905) DETAIL A .300 (7.620) +.012 .143 –.020 +0.305 3.632 –0.508 ( BOTTOM VIEW OF DD PAK HATCHED AREA IS SOLDER PLATED COPPER HEAT SINK .067 (1.702) .028 – .038 BSC (0.711 – 0.965) TYP ) .013 – .023 (0.330 – 0.584) .050 ±.012 (1.270 ±0.305) DETAIL A 0° – 7° TYP .420 .276 .080 .420 0° – 7° TYP .325 .350 .205 .585 .585 .320 .090 .090 .067 .042 RECOMMENDED SOLDER PAD LAYOUT NOTE: 1. DIMENSIONS IN INCH/(MILLIMETER) 2. DRAWING NOT TO SCALE .067 .042 RECOMMENDED SOLDER PAD LAYOUT FOR THICKER SOLDER PASTE APPLICATIONS Q(DD5) 0811 REV F 3015fb 23 LT3015 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. T Package 5-Lead Plastic TO-220 (Standard) (Reference LTC DWG # 05-08-1421) .390 – .415 (9.906 – 10.541) .165 – .180 (4.191 – 4.572) .147 – .155 (3.734 – 3.937) DIA .045 – .055 (1.143 – 1.397) .230 – .270 (5.842 – 6.858) .460 – .500 (11.684 – 12.700) .570 – .620 (14.478 – 15.748) .330 – .370 (8.382 – 9.398) .700 – .728 (17.78 – 18.491) .620 (15.75) TYP SEATING PLANE .152 – .202 .260 – .320 (3.861 – 5.131) (6.60 – 8.13) BSC .067 (1.70) .095 – .115 (2.413 – 2.921) .155 – .195* (3.937 – 4.953) .013 – .023 (0.330 – 0.584) .028 – .038 (0.711 – 0.965) .135 – .165 (3.429 – 4.191) * MEASURED AT THE SEATING PLANE T5 (TO-220) 0801 3015fb 24 LT3015 Series REVISION HISTORY REV DATE DESCRIPTION A 12/11 Revised entire data sheet to include fixed output voltages. PAGE NUMBER B 4/12 Clarified conditions of “RMS Output Noise vs Load Current” graph 1 - 26 11 3015fb 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. 25 LT3015 Series TYPICAL APPLICATION Paralleling Regulators For Higher Output Current C1 22µF SHDN R1 0.01Ω VIN < –5.5V R9 12.1k 1% GND ADJ R8 37.4k 1% LT3015 IN OUT R6 41.2k 1% LT3015 IN VOUT –5V –3.0A R7 12.1k 1% GND SHDN ADJ R2 0.01Ω C2 22µF OUT R5 50k C3 0.01µF R3 2.2k R4 2.2k 2 3 – + 8 1/2 LT1366 1 4 3015 TA03 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1185 3A, Negative Linear Regulator 670mV Dropout Voltage, VIN = –4.3V to –35V, DD-Pak and TO-220 Packages LT1175 500mA, Negative Low Dropout Micropower Regulator 500mV Dropout Voltage, VIN = –4.5V to –20V, S8, N8, SOT-223, DD-Pak and TO-220 Packages LT1964 200mA, Negative Low Noise Low Dropout Regulator 340mV Dropout Voltage, Low Noise: 30µVRMS, VIN = –1.9V to –20V, 3mm × 3mm DFN and ThinSOT Packages LT1764A 3A, Fast Transient Response, Low Noise LDO Regulator 340mV Dropout Voltage, Low Noise: 40µVRMS, VIN = 2.7V to 20V, TO-220 and DD-Pak Packages, “A” Version Stable also with Ceramic Caps LT1763 500mA, Low Noise, LDO Regulator 300mV Dropout Voltage, Low Noise : 20µVRMS, VIN = 1.6V to 20V, Stable with 3.3µF Output Capacitors, S8 and 3mm × 4mm DFN Packages LT1963A 1.5A Low Noise, Fast Transient Response LDO Regulator 340mV Dropout Voltage, Low Noise: 40µVRMS, VIN = 2.5V to 20V, “A” Version Stable with Ceramic Caps, TO-220, DD-Pak, SOT-223 and SO-8 Packages LT1965 1.1A, Low Noise, LDO Regulator 310mV Dropout Voltage, Low Noise: 40µVRMS , VIN : 1.8V to 20V, VOUT: 1.2V to 19.5V, Stable with Ceramic Caps, TO-220, DD-Pak, MSOP-8E and 3mm × 3mm DFN Packages LT3022 1A, Low Voltage, Very Low Dropout VLDO Linear Regulator VIN = 0.9V to 10V, Dropout Voltage: 145mV Typical, Adjustable Output (VREF = VOUT(MIN) = 200mV), Fixed Output Voltages: 1.2V, 1.5V, 1.8V, Stable with Low ESR, Ceramic Output Capacitors 16-Pin 3mm × 5mm DFN and MSOP-16E Packages LT3080/LT3080-1 1.1A, Parallelable, Low Noise, Low Dropout Linear Regulator 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 (no op amp required), Stable with Ceramic Caps, TO-220, DD-Pak, SOT-223, MSOP-8E and 3mm × 3mm DFN Packages; “–1” Version has Integrated Internal Ballast Resistor LT3085 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 (no op amp required), Stable with Ceramic Caps, MSOP-8E and 2mm × 3mm DFN Packages 500mA, Parallelable, Low Noise, Low Dropout Linear Regulator 3015fb 26 Linear Technology Corporation LT 0412 REV B • PRINTED IN USA 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com LINEAR TECHNOLOGY CORPORATION 2011