LT3007 Series 3µA IQ, 20mA, 45V Low Dropout Fault Tolerant Linear Regulators DESCRIPTION FEATURES FMEA Fault Tolerant: Output Stays at or Below Regulation Voltage During Adjacent Pin Short or if a Pin Is Left Floating n Ultralow Quiescent Current: 3µA n Input Voltage Range: 2.0V to 45V n Output Current: 20mA n Dropout Voltage: 300mV n Adjustable Output (V ADJ = VOUT(MIN) = 600mV) n Fixed Output Voltages: 1.2V, 1.5V, 1.8V, 2.5V, 3.3V, 5V n Output Tolerance: ±2% Over Load, Line and Temperature n Stable with Low ESR, Ceramic Output Capacitors (2.2µF Minimum) n Shutdown Current: <1µA n Current Limit Protection n Reverse-Battery Protection n Thermal Limit Protection n TSOT-23 Package n APPLICATIONS Automotive Low Current Battery-Powered Systems n Keep-Alive Power Supplies n Remote Monitoring n Utility Meters n Low Power Industrial Applications n The LT®3007 series are micropower, low dropout voltage (LDO) linear regulators. The devices supply 20mA output current with a dropout voltage of 300mV. No-load quiescent current is 3µA. Ground pin current remains at less than 5% of output current as load increases. In shutdown, quiescent current is less than 1µA. The LT3007 regulators optimize stability and transient response with low ESR ceramic capacitors, requiring a minimum of only 2.2µF. The regulators do not require the addition of ESR as is common with other regulators. Internal protection circuitry includes current limiting, thermal limiting, reverse-battery protection and reversecurrent protection. The LT3007 series are ideal for applications that require moderate output drive capability coupled with ultralow standby power consumption. The device is available in fixed output voltages of 1.2V, 1.5V, 1.8V, 2.5V, 3.3V and 5V, and an adjustable version with an output voltage range of 0.6V to 44.5V. The LT3007 is available in the thermally enhanced 8-lead TSOT-23 package. L, LT, LTC, LTM, Linear Technology and the Linear logo are registered and ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. n TYPICAL APPLICATION Dropout Voltage/Quiescent Current 500 3.3V, 20mA Supply with Shutdown OUT LT3007-3.3 SHDN SENSE GND 3007 TA01a 2.2µF DROPOUT VOLTAGE (mV) IN 1µF VOUT 3.3V 20mA DROPOUT VOLTAGE 400 350 5 4 300 250 IQ 200 3 2 150 100 QUIESCENT CURRENT (µA) VIN 3.8V TO 45V 450 6 ILOAD = 20mA 1 50 0 –50 –25 0 0 25 50 75 100 125 150 TEMPERATURE (°C) 3007 TA01b 3007fa For more information www.linear.com/LT3007 1 LT3007 Series ABSOLUTE MAXIMUM RATINGS (Note 1) PIN CONFIGURATION IN Pin Voltage......................................................... ±50V OUT Pin Voltage...................................................... ±50V Input-to-Output Differential Voltage........................ ±50V ADJ Pin Voltage...................................................... ±50V SENSE Pin Voltage.................................................. ±50V SHDN Pin Voltage (Note 8)..................................... ±50V Output Short-Circuit Duration........................... Indefinite Operating Junction Temperature Range (Notes 2, 4) E-, I-Grades........................................ –40°C to 125°C H-Grade.............................................. –40°C to 150°C Storage Temperature Range................... –65°C to 150°C Lead Temperature: Soldering, 10 sec..................... 300°C LT3007-ADJUSTABLE TOP VIEW SHDN GND GND GND 8 7 6 5 1 2 3 4 ADJ OUT NC IN TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX = 150°C, θJA = 65°C/W TO 85°C/W* LT3007-FIXED OUTPUTS TOP VIEW SHDN GND GND GND 1 2 3 4 8 7 6 5 SENSE OUT NC IN TS8 PACKAGE 8-LEAD PLASTIC TSOT-23 TJMAX = 125°C, θJA = 65°C/W TO 85°C/W* * See the Applications Information Section. ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3007ETS8#PBF LT3007ETS8#TRPBF LTGJW 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8#PBF LT3007ITS8#TRPBF LTGJW 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007HTS8#PBF LT3007HTS8#TRPBF LTGJW 8-Lead Plastic TSOT-23 –40°C to 150°C LT3007ETS8-1.2#PBF LT3007ETS8-1.2#TRPBF LTGKB 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-1.2#PBF LT3007ITS8-1.2#TRPBF LTGKB 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-1.5#PBF LT3007ETS8-1.5#TRPBF LTGKD 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-1.5#PBF LT3007ITS8-1.5#TRPBF LTGKD 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-1.8#PBF LT3007ETS8-1.8#TRPBF LTGJZ 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-1.8#PBF LT3007ITS8-1.8#TRPBF LTGJZ 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-2.5#PBF LT3007ETS8-2.5#TRPBF LTGJX 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-2.5#PBF LT3007ITS8-2.5#TRPBF LTGJX 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-3.3#PBF LT3007ETS8-3.3#TRPBF LTGKC 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-3.3#PBF LT3007ITS8-3.3#TRPBF LTGKC 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-5#PBF LT3007ETS8-5#TRPBF LTGJY 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-5#PBF LT3007ITS8-5#TRPBF LTGJY 8-Lead Plastic TSOT-23 –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. 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/ 3007fa 2 For more information www.linear.com/LT3007 LT3007 Series ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. (Note 2) PARAMETER Operating Voltage Regulated Output Voltage ADJ Pin Voltage (Notes 3, 4) Line Regulation (Note 3) Load Regulation (Note 3) Dropout Voltage VIN = VOUT(NOMINAL) (Notes 5, 6) CONDITIONS MIN l 2 1.188 1.176 1.485 1.47 1.782 1.764 2.475 2.45 3.267 3.234 4.95 4.9 l l 594 588 582 l LT3007-1.2: VIN = 2V, ILOAD = 100µA 2V < VIN < 45V, 1µA < ILOAD < 20mA LT3007-1.5: VIN = 2.05V, ILOAD = 100µA 2.05V < VIN < 45V, 1µA < ILOAD < 20mA LT3007-1.8: VIN = 2.35V, ILOAD = 100µA 2.35V < VIN < 45V, 1µA < ILOAD < 20mA LT3007-2.5: VIN = 3.05V, ILOAD = 100µA 3.05V < VIN < 45V, 1µA < ILOAD < 20mA LT3007-3.3: VIN = 3.85V, ILOAD = 100µA 3.85V < VIN < 45V, 1µA < ILOAD < 20mA LT3007-5: VIN = 5.55V, ILOAD = 100µA 5.55V < VIN < 45V, 1µA < ILOAD < 20mA VIN = 2V, ILOAD = 100µA 2V < VIN < 45V, 1µA < ILOAD < 20mA (E-, I-Grades) 2V < VIN < 45V, 20µA < ILOAD < 20mA (H-Grade) LT3007-1.2: ∆VIN = 2V to 45V, ILOAD = 1mA LT3007-1.5: ∆VIN = 2.05V to 45V, ILOAD = 1mA LT3007-1.8: ∆VIN = 2.35V to 45V, ILOAD = 1mA LT3007-2.5: ∆VIN = 3.05V to 45V, ILOAD = 1mA LT3007-3.3: ∆VIN = 3.85V to 45V, ILOAD = 1mA LT3007-5: ∆VIN = 5.55V to 45V, ILOAD = 1mA LT3007 (E-, I-Grades): ∆VIN = 2V to 45V, ILOAD = 1mA LT3007 (H-Grade): ∆VIN = 2V to 45V, ILOAD = 1mA LT3007-1.2:VIN = 2V, ILOAD = 1µA to 10mA VIN = 2V, ILOAD = 1µA to 20mA LT3007-1.5:VIN = 2.05V, ILOAD = 1µA to 10mA VIN = 2.05V, ILOAD = 1µA to 20mA LT3007-1.8:VIN = 2.35V, ILOAD = 1µA to 10mA VIN = 2.35V, ILOAD = 1µA to 20mA LT3007-2.5:VIN = 3.05V, ILOAD = 1µA to 10mA VIN = 3.05V, ILOAD = 1µA to 20mA LT3007-3.3:VIN = 3.85V, ILOAD = 1µA to 10mA VIN = 3.85V, ILOAD = 1µA to 20mA LT3007-5: VIN = 5.55V, ILOAD = 1µA to 10mA VIN = 5.55V, ILOAD = 1µA to 20mA LT3007 (E-, I-Grades): VIN = 2V, ILOAD = 1µA to 10mA VIN = 2V, ILOAD = 1µA to 20mA LT3007 (H-Grade): VIN = 2V, ILOAD = 20µA to 10mA VIN = 2V, ILOAD = 20µA to 20mA ILOAD = 100µA ILOAD = 100µA (E-, I-Grades) ILOAD = 100µA (H-Grade) ILOAD = 1mA ILOAD = 1mA (E-, I-Grades) ILOAD = 1mA (H-Grade) ILOAD = 10mA ILOAD = 10mA (E-, I-Grades) ILOAD = 10mA (H-Grade) ILOAD = 20mA ILOAD = 20mA (E-, I-Grades) ILOAD = 20mA (H-Grade) l l l l l l l l l l l l l l l l l l l l l l l l l l l l l TYP MAX UNITS 1.2 1.2 1.5 1.5 1.8 1.8 2.5 2.5 3.3 3.3 5 5 45 1.212 1.224 1.515 1.53 1.818 1.836 2.525 2.55 3.333 3.366 5.05 5.1 V V V V V V V V V V V V V 600 600 606 612 612 mV mV mV 1.2 1.5 1.8 2.5 3.3 5 0.6 0.6 0.8 1 1 1.3 1.2 1.5 1.7 2.1 2.2 2.8 3.4 4.2 0.4 0.5 0.4 0.5 115 6 7.5 9 12.5 16.5 25 3 9 4 10 5 13 6 15 8.3 21 11 28 17 42 2 5 5 9 180 250 290 250 350 390 340 470 510 365 500 540 mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV mV l l 170 l l 270 l l 300 l l 3007fa For more information www.linear.com/LT3007 3 LT3007 Series ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. (Note 2) PARAMETER CONDITIONS Quiescent Current (Notes 6, 7) ILOAD = 0µA (E-, I-Grades) ILOAD = 0µA (H-Grade) ILOAD = 0µA (E-, I-Grades) ILOAD = 0µA (H-Grade) ILOAD = 100µA (E-, I-Grades) ILOAD = 100µA (H-Grade) ILOAD = 1mA ILOAD = 10mA ILOAD = 20mA COUT = 2.2µF, ILOAD = 20mA, BW = 10Hz to 100kHz GND Pin Current VIN = VOUT(NOMINAL) + 0.5V (Notes 6, 7) Output Voltage Noise (Note 9) TYP MAX UNITS l l MIN 3 l l l l l l l 3 6 7 6 7 12 14 50 500 1200 µA µA µA µA µA µA µA µA µA ADJ Pin Bias Current VOUT = Off to On VOUT = On to Off VSHDN = 0V, VIN = 45V VSHDN = 45V, VIN = 45V VIN = 6V, VSHDN = 0V (E-, I-Grades) VIN = 6V, VSHDN = 0V (H-Grade) VIN – VOUT = 2V, VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 20mA LT3007 LT3007-1.2 LT3007-1.5 LT3007-1.8 LT3007-2.5 LT3007-3.3 LT3007-5 VIN = 45V, VOUT = 0 VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 5% l l Input Reverse-Leakage Current VIN = –45V, VOUT = 0 l Reverse-Output Current VOUT = 1.2V, VIN = 0 Shutdown Threshold SHDN Pin Current Quiescent Current in Shutdown Ripple Rejection (Note 3) Current Limit (Note 3) 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 LT3007 is tested and specified under pulse load conditions such that TJ @ TA. The LT3007E 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 LT3007I regulators are guaranteed over the full −40°C to 125°C operating junction temperature range. The LT3007H regulator is 100% tested at the 150°C operating junction temperature. High junction temperatures degrade operating lifetimes. Operating lifetime is derated at junction temperature greater than 125°C. H-grade is available only in the adjustable version. Note 3: The LT3007 adjustable version is tested and specified for these conditions with the ADJ pin connected to the OUT pin. Note 4: Operating conditions are limited by maximum junction temperature. The regulated output voltage specification will not apply for all possible combinations of input voltage and output current. When operating at the maximum input voltage, the output current range must be limited. When operating at the maximum output current, the input voltage must be limited. 6 21 160 350 92 0.4 10 nA 0.25 0.67 0.61 1.5 V V µA µA µA µA l l 0.65 <1 <9 l l 58 54 53 52 49 47 42 l µVRMS –10 22 ±1 2 dB dB dB dB dB dB dB mA mA 70 66 65 64 61 59 54 75 1 30 µA 0.6 10 µA 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 equals (VIN – VDROPOUT). For the LT3007-1.2 and LT3007‑1.5, dropout voltage will be limited by the minimum input voltage. Note 6: To satisfy minimum input voltage requirements, the LT3007 adjustable version is tested and specified for these conditions with an external resistor divider (61.9k bottom, 280k top) which sets VOUT to 3.3V. The external resistor divider adds 9.69µA of DC load on the output. This external current is not factored into GND pin current. Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.55V and a current source load. GND pin current will increase in dropout. For the fixed output voltage versions, an internal resistor divider will add about 1μA to the GND pin current. See the GND Pin Current curves in the Typical Performance Characteristics section. Note 8: The SHDN pin can be driven below GND only when tied to the IN pin directly or through a pull-up resistor. If the SHDN pin is driven below GND by more than –0.3V while IN is powered, the output will turn on. Note 9: Output noise is listed for the adjustable version with the ADJ pin connected to the OUT pin. See the RMS Output Noise vs Load Current curve in the Typical Performance Characteristics Section. 3007fa 4 For more information www.linear.com/LT3007 LT3007 Series TYPICAL PERFORMANCE CHARACTERISTICS Dropout Voltage Dropout Voltage 350 TJ = 125°C TJ = 150°C 300 DROPOUT VOLTAGE (mV) DROPOUT VOLTAGE (mV) 400 TJ = 25°C 250 200 150 100 2.0 400 1.8 350 200 1mA 100µA 150 100 0 0 20 10mA 250 50 5 10 15 OUTPUT CURRENT (mA) 20mA 300 50 0 Minimum Input Voltage 450 –50 –25 1.4 1.2 1 0.8 0.6 0.4 0 25 50 75 0 100 125 150 –50 –25 1.220 ILOAD = 100µA 1.525 1.520 1.212 1.515 0.598 0.596 0.594 OUTPUT VOLTAGE (V) 1.216 0.600 1.208 1.204 1.200 1.196 1.192 1.188 1.510 1.505 1.500 1.495 1.490 1.485 1.184 1.480 0.590 1.180 1.176 –50 –25 1.475 1.470 –50 –25 25 50 75 100 125 150 ILOAD = 100µA 0.592 0 75 Output Voltage LT3007-1.5 1.530 0.606 0.602 50 3007 G03 0.608 0.604 25 TEMPERATURE (°C) Output Voltage LT3007-1.2 1.224 ILOAD = 100µA 0.588 –50 –25 0 3007 G02 OUTPUT VOLTAGE (V) ADJ PIN VOLTAGE (V) 1.6 TEMPERATURE (°C) ADJ Pin Voltage 0.610 ILOAD = 20mA 0.2 3007 G01 0.612 MINIMUM INPUT VOLTAGE (V) 450 TA = 25°C, unless otherwise noted. 100 125 150 0 TEMPERATURE (°C) 25 50 75 100 125 150 TEMPERATURE (°C) 0 25 50 75 100 125 150 TEMPERATURE (°C) 3007 G05 3007 G06 3007 G04 Output Voltage LT3007-1.8 1.830 Output Voltage LT3007-2.5 2.550 ILOAD = 100µA 2.540 1.812 1.806 1.800 1.794 1.788 1.782 2.520 2.510 2.500 2.490 2.480 2.470 1.776 1.770 1.764 –50 –25 3.355 3.344 2.530 1.816 OUTPUT VOLTAGE (V) OUTPUT VOLTAGE (V) 1.824 3.366 ILOAD = 100µA OUTPUT VOLTAGE (V) 1.836 0 25 50 75 TEMPERATURE (°C) 100 125 150 3007 G07 ILOAD = 100µA 3.333 3.322 3.311 3.300 3.289 3.278 3.267 3.256 2.460 2.450 –50 –25 Output Voltage LT3007-3.3 3.245 0 25 50 75 TEMPERATURE (°C) 100 125 150 3007 G08 3.234 –50 –25 0 25 50 75 TEMPERATURE (°C) 100 125 150 3007 G09 3007fa For more information www.linear.com/LT3007 5 LT3007 Series TYPICAL PERFORMANCE CHARACTERISTICS ADJ Pin Bias Current Output Voltage LT3007-5 ILOAD = 100µA 6 8 ADJ PIN BIAS CURRENT (nA) 5.050 5.025 5.000 4.975 4.950 4.925 5 6 4 2 0 –2 –4 –6 0 25 50 75 –10 100 125 150 TEMPERATURE (°C) –50 –25 QUIESCENT CURRENT (µA) 24 21 18 15 12 9 9 10 RL = 60Ω, IL = 20mA 300 250 200 RL = 120Ω, IL = 10mA 150 0 8 GND Pin Current LT3007-1.8 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 9 0 10 450 400 GND PIN CURRENT (µA) 450 400 RL = 180Ω, IL = 10mA 150 100 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) RL = 250Ω, IL = 10mA 150 8 9 10 3007 G16 0 RL = 2.5k, IL = 1mA 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 0 1 2 8 3 4 5 6 7 INPUT VOLTAGE (V) 8 9 10 3007 G15 RL = 165Ω, IL = 20mA 350 300 250 200 RL = 330Ω, IL = 10mA 150 100 RL = 25k, IL = 100µA 50 RL = 1.8k, IL = 1mA 0 300 250 100 RL = 18k, IL = 100µA 50 RL = 125Ω, IL = 20mA 200 RL = 1.5k, IL = 1mA GND Pin Current LT3007-3.3 400 200 RL = 15k, IL = 100µA 3007 G14 450 300 RL = 150Ω, IL = 10mA 150 500 350 RL = 75Ω, IL = 20mA 200 500 250 100 125 150 250 GND Pin Current LT3007-2.5 500 RL = 90Ω, IL = 20mA 75 300 50 RL = 1.2k, IL = 1mA 0 350 100 RL = 12k, IL = 100µA 3007 G13 350 50 GND Pin Current LT3007-1.5 400 350 0 7 25 3007 G12 450 50 6 0 TEMPERATURE (°C) 450 INPUT VOLTAGE (V) GND PIN CURRENT (µA) 0 –50 –25 100 125 150 400 100 5 75 500 3 4 50 500 6 3 25 3007 G11 GND PIN CURRENT (µA) LT3007-1.2 LT3007-1.5 LT3007-1.8 LT3007-2.5 LT3007-3.3 LT3007-5 2 2 GND Pin Current LT3007-1.2 27 1 3 TEMPERATURE (°C) 3007 G10 Quiescent Current 30 0 0 GND PIN CURRENT (µA) 4.900 –50 –25 4 1 –8 GND PIN CURRENT (µA) OUTPUT VOLTAGE (V) 5.075 Adjustable Quiescent Current 10 QUIESCENT CURRENT (µA) 5.100 TA = 25°C, unless otherwise noted. 9 10 3007 G17 RL = 33k, IL = 100µA 50 0 RL = 3.3k, IL = 1mA 0 1 2 3 4 5 6 7 INPUT VOLTAGE (V) 8 9 10 3007 G18 3007fa 6 For more information www.linear.com/LT3007 LT3007 Series TYPICAL PERFORMANCE CHARACTERISTICS 450 GND CURRENT (µA) GND PIN CURRENT (µA) RL = 250Ω, IL = 20mA 300 250 200 RL = 500Ω, IL = 10mA 150 100 10 RL = 50k, IL = 100µA 100 50 0 VIN = 3.8V VOUT = 3.3V SHDN PIN THRESHOLD (V) 1000 350 SHDN Pin Thresholds GND Pin Current vs ILOAD GND Pin Current LT3007-5 500 400 TA = 25°C, unless otherwise noted. RL = 5k, IL = 1mA 0 1 3 4 5 6 7 INPUT VOLTAGE (V) 2 8 9 1 0.001 10 0.01 0.1 1 10 100 1.5 1.4 1.3 1.2 1.1 1 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –50 –25 OFF TO ON ON TO OFF 0 LOAD (mA) 3007 G19 25 50 75 100 125 150 TEMPERATURE (°C) 3007 G21 3007 G20 Current Limit SHDN Pin Input Current 100 1.8 1.8 90 1.6 80 1.6 1.4 1.2 1 0.8 0.6 0.4 0.2 0 5 10 15 20 25 30 35 SHDN PIN VOLTAGE (V) 1.4 1.2 1 VSHDN = 45V 0.8 0.6 40 45 INPUT RIPPLE REJECTION (dB) REVERSE OUTPUT CURRENT (µA) 30 25 20 15 ADJ 0 –50 –25 OUT 0 25 50 75 100 125 150 TEMPERATURE (°C) 3007 G25 25 50 75 100 125 150 TEMPERATURE (°C) Input Ripple Rejection VIN = 2.1V + 50mVRMS VOUT = 600mV ILOAD = 20mA 80 35 0 3007 G24 Input Ripple Rejection 40 5 0 –50 –25 25 50 75 100 125 150 TEMPERATURE (°C) 90 OUT = ADJ = 1.2V IN = SHDN = GND 10 30 3007 G23 Reverse-Output Current 45 VIN = 2V 40 10 3007 G22 50 50 20 0 VIN = 45V 60 0.2 0 –50 –25 VOUT = 0V 70 0.4 70 60 50 COUT = 10µF 40 30 20 COUT = 2.2µF 10 0 10 100 1000 10000 100000 1000000 FREQUENCY (Hz) 3007 G26 80 70 INPUT RIPPLE REJECTION (dB) 0 CURRENT LIMIT (mA) 2.0 SHDN PIN INPUT CURRENT (µA) SHDN PIN INPUT CURRENT (µA) SHDN Pin Input Current 2.0 60 50 40 30 20 10 VIN = VOUT (NOMINAL) + 2V + 0.5VP-P RIPPLE AT f = 120Hz ILOAD = 20mA 0 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3007 G27 3007fa For more information www.linear.com/LT3007 7 LT3007 Series TYPICAL PERFORMANCE CHARACTERISTICS VOUT = 0.6V VIN = 2.1V 3 2 1 ∆IL = 1μA TO 20mA 0 ∆IL = 20μA TO 20mA –1 –50 –25 0 25 50 75 100 125 150 100 COUT = 2.2µF ILOAD = 20mA 5V 3.3V 2.5V 1.8V 1.5V 1V 0.6V 10 1 0.1 10 TEMPERATURE (°C) 100 1k 10k FREQUENCY (Hz) 3007 G28 VOUT 50mV/DIV 500µs/DIV 3007 G31 COUT = 10µF 5V 400 350 3.3V 300 2.5V 250 1.8V 200 1.5V 150 100 1.2V 50 0.6V 0 0.001 0.01 0.1 1 100 10 ILOAD (mA) 3007 G30 Transient Response IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 2.2µF IOUT 20mA/DIV 450 3007 G29 Transient Response VOUT 50mV/DIV 100k 500 OUTPUT NOISE (µVRMS) LOAD REGULATION (mV) 4 RMS Output Noise vs Load Current Output Noise Spectral Density OUTPUT NOISE SPECTRAL DENSITY (µV√Hz) 5 Load Regulation TA = 25°C, unless otherwise noted. Transient Response (Load Dump) IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 10µF VOUT 50mV/DIV 45V VOUT = 5V IOUT = 20mA COUT = 4.7µF VIN 10V/DIV IOUT 20mA/DIV 500µs/DIV 3007 G32 1ms/DIV 12V 3007 G33 3007fa 8 For more information www.linear.com/LT3007 LT3007 Series PIN FUNCTIONS SHDN (Pin 1): Shutdown. Pulling the SHDN pin low puts the LT3007 into a low power state and turns the output off. If unused, tie the SHDN pin to VIN. The LT3007 does not function if the SHDN pin is not connected. The SHDN pin cannot be driven below GND unless tied to the IN pin. If the SHDN pin is driven below GND while IN is powered, the output will turn on. SHDN pin logic cannot be referenced to a negative rail. GND (Pins 2, 3, 4): Ground. Connect the bottom of the resistor divider that sets output voltage directly to GND for the best regulation. IN (Pin 5): Input. The IN pin supplies power to the device. The LT3007 requires a bypass capacitor at IN if the device is more than six inches away from the main input filter capacitor. In general, the output impedance of a battery rises with frequency, so it is advisable to include a bypass capacitor in battery-powered circuits. A bypass capacitor in the range of 0.1µF to 10µF will suffice. The LT3007 withstands reverse voltages on the IN pin with respect to ground and the OUT pin. In the case of a reversed input, which occurs with a battery plugged in backwards, the LT3007 acts as if a blocking diode is in series with its input. No reverse current flows into the LT3007 and no reverse voltage appears at the load. The device protects both itself and the load. NC (Pin 6): No Connect. Pin 6 is an NC pin in the TSOT-23 package. This pin is not tied to any internal circuitry. LTC recommends that the NC pin be floated for fault tolerant operation. OUT (Pin 7): Output. This pin supplies power to the load. Use a minimum output capacitor of 2.2µF 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 and reverse-output characteristics. ADJ (Pin 8): Adjust. This pin is the error amplifier’s inverting terminal. Its 400pA typical input bias current 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 and the output voltage range is 600mV to 44.5V. SENSE (Pin 8): Sense. For fixed voltage versions of the LT3007 (LT3007-1.2, LT3007-1.5, LT3007-1.8, LT30072.5, LT3007-3.3, LT3007-5), the SENSE pin is the input to the error amplifier. Optimum regulation is obtained at the point where 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 PC traces between the regulator and the load. These may 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 PC traces add to the dropout voltage of the regulator. The SENSE pin bias current is 1µA at the nominal rated output voltage. The SENSE pin can be pulled below ground (as in a dual supply system where the regulator load is returned to a negative supply) and still allow the device to start and operate. IN OUT RP LT3007 VIN + SHDN + SENSE LOAD GND RP 3007 F01 Figure 1. Kelvin Sense Connection 3007fa For more information www.linear.com/LT3007 9 LT3007 Series APPLICATIONS INFORMATION The LT3007 is a low dropout linear regulator with ultralow quiescent current and shutdown. Quiescent current is extremely low at 3µA and drops well below 1µA in shutdown. The device supplies up to 20mA of output current. Dropout voltage at 20mA is typically 300mV. The LT3007 incorporates several protection features, making it ideal for use in battery-powered systems. The device protects itself against both reverse-input and reverse-output voltages. In battery backup applications, where a backup battery holds up the output when the input is pulled to ground, the LT3007 acts as if a blocking diode is in series with its output and prevents reverse current flow. In applications where the regulator load returns to a negative supply, the output can be pulled below ground by as much as 50V without affecting start-up or normal operation. Care must be taken when designing LT3007 applications to operate at temperatures greater than 125°C. See the High Temperature Operation Section for more information. Adjustable Operation The LT3007 has an output voltage range of 0.6V to 44.5V. Figure 2 shows that output voltage is set by the ratio of two external resistors. The IC regulates the output to maintain the ADJ pin voltage at 600mV referenced to ground. The current in R1 equals 600mV/R1 and the current in R2 is the current in R1 minus the ADJ pin bias current. The ADJ pin bias current, typically 400pA at 25°C, flows out of the pin. Calculate the output voltage using the formula in Figure 2. An R1 value of 619k sets the divider current to 0.97µA. Do not make R1’s value any greater than 619k to minimize output voltage errors due to the ADJ pin bias current and to insure stability under minimum load conditions. In shutdown, the output turns off IN VIN VOUT OUT LT3007 SHDN R2 ADJ GND R1 3007 F02 VOUT = 600mV • (1 + R2/R1) – (IADJ • R2) VADJ = 600mV IADJ = 0.4nA at 25°C OUTPUT RANGE = 0.6V to 44.5V Figure 2. Adjustable Operation 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. 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 100µA to 20mA is –0.5mV typical at VOUT = 0.6V. At VOUT = 5V, load regulation is: 5V • (−0.5mV) = −4.17mV 0.6V Table 1 shows resistor divider values for some common output voltages with a resistor divider current of about 1µA. Table 1. Output Voltage Resistor Divider Values VOUT R1 R2 1V 604k 402k 1.2V 590k 590k 1.5V 590k 887k 1.8V 590k 1.18M 2.5V 590k 1.87M 3V 590k 2.37M 3.3V 619k 2.8M 5V 590k 4.32M Because the ADJ pin is relatively high impedance (depending on the resistor divider used), stray capacitances at this pin should be minimized. Special attention should be given to any stray capacitances that can couple external signals onto the ADJ pin, producing undesirable output transients or ripple. Extra care should be taken in assembly when using high valued resistors. Small amounts of board contamination can lead to significant shifts in output voltage. Appropriate post-assembly board cleaning measures should be implemented to prevent board contamination. If the board is to be subjected to humidity cycling or if board cleaning measures cannot be guaranteed, consideration should be given to using resistors an order of magnitude smaller than in Table 1 to prevent contamination from causing unwanted shifts in the output voltage. A fixed voltage option in the LT3007 series does not need these special considerations. 3007fa 10 For more information www.linear.com/LT3007 LT3007 Series APPLICATIONS INFORMATION Output Capacitance and Transient Response The LT3007 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 2.2µF with an ESR of 3Ω or less to prevent oscillations. The LT3007 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. 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 3 and 4. 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 20 40 20 X5R CHANGE IN VALUE (%) 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 accelerometer or microphone works. For a ceramic capacitor, the stress can be induced by vibrations in the system or thermal transients. BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF 0 –20 –40 –60 Y5V –80 –100 over the operating temperature range. The X5R and X7R dielectrics yield 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. One must still exercise care 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 –40 2 4 8 6 10 12 DC BIAS VOLTAGE (V) 14 16 BOTH CAPACITORS ARE 16V, 1210 CASE SIZE, 10µF –100 –50 –25 3007 F03 Figure 3. Ceramic Capacitor DC Bias Characteristics Y5V –60 –80 0 X5R 0 50 25 75 0 TEMPERATURE (°C) 100 125 3007 F04 Figure 4. Ceramic Capacitor Temperature Characteristics 3007fa For more information www.linear.com/LT3007 11 LT3007 Series APPLICATIONS INFORMATION The resulting voltages produced can cause appreciable amounts of noise, especially when a ceramic capacitor is used for noise bypassing. A ceramic capacitor produced Figure 5’s trace in response to light tapping from a pencil. Similar vibration induced behavior can masquerade as increased output voltage noise. Table 2. Feedforward Capacitor Values NOMINAL VOUT FEEDFORWARD CAPACITANCE 1.2 < VOUT ≤ 2.5 470pF/μA • IFB-DIVIDER (μA) 2.5 < VOUT ≤ 7.5 220pF/μA • IFB-DIVIDER (μA) VOUT > 7.5 100pF/μA • IFB-DIVIDER (μA) For example, a 5V output with a 1μA current flowing in the feedback resistor divider: CFF = 220pF/μA • 1μA = 220pF VOUT = 0.6V COUT = 22µF ILOAD = 10µA VOUT 500µV/DIV CFF = 0 VOUT 100mV/DIV CFF = 220pF 3007 F05 100ms/DIV Figure 5. Noise Resulting from Tapping on a Ceramic Capacitor VOUT = 5V COUT = 10µF IFB-DIVIDER = 1µA LOAD CURRENT 2mA TO 20mA 500µs/DIV Feedforward Capacitance Using a feedforward capacitor (CFF) from VOUT to the ADJ pin of the LT3007 improves transient response for output voltages greater than 0.6V. With no feedforward capacitor, the settling time will increase as the output voltage is raised above 0.6V. A 4.7μF minimum output capacitor with an ESR of no more than 3Ω is required when using a feedforward capacitor. Use Table 2 to determine the recommended value of CFF to achieve optimal transient response while maintaining stability. Round up to the nearest standard capacitor value. IN VIN VOUT OUT LT3007 SHDN GND R2 CFF COUT Figure 7. Transient Response with Feedforward Capacitor 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 output voltage, and is inversely proportional to the feedback resistor divider current. The use of a feedforward capacitor is required for operation at junction temperatures above 135°C in order to ensure good transient response. CFF = 0 IFB-DIVIDER 3007 F06 V = OUT R1+R2 VOUT 200mV/DIV CFF = 4700pF ADJ R1 3007 F07 LOAD CURRENT 2mA TO 20mA VOUT = 5V COUT = 10µF IFB-DIVIDER = 20µA 500µs/DIV Figure 6. Feedforward Capacitor 3007 F08 Figure 8. Transient Response with Feedforward Capacitor at 150°C 3007fa 12 For more information www.linear.com/LT3007 LT3007 Series APPLICATIONS INFORMATION Thermal Considerations The LT3007’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/output voltage differential: IOUT • (VIN – VOUT) 2. GND pin current multiplied by the input voltage: IGND • VIN GND pin current is found by examining the GND Pin Current curves in the Typical Performance Characteristics section. Power dissipation is equal to the sum of the two components listed prior. The LT3007 regulator has internal thermal limiting designed to protect the device during overload conditions. 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 proximity to the LT3007. 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. The following tables list thermal resistance for several different board sizes and copper areas. All measurements were taken in still air on 3/32" FR-4 two-layer boards with one ounce copper. PCB layers, copper weight, board layout and thermal vias affect the resultant thermal resistance. Although Table 2 provides thermal resistance numbers for 2-layer boards with 1 ounce copper, modern multilayer PCBs provide better performance than found in these tables. For example, a 4-layer, 1 ounce copper PCB board with three thermal vias from the three fused TSOT-23 GND pins to inner layer GND planes achieves 45°C/W thermal resistance. This is approximately a 30% improvement over the lowest numbers shown in Table 3. Table 3: Measured Thermal Resistance for TSOT-23 Package COPPER AREA TOPSIDE* BACKSIDE BOARD AREA THERMAL RESISTANCE (JUNCTION-TO-AMBIENT) 2500mm2 2500mm2 2500mm2 65°C/W 1000mm2 2500mm2 2500mm2 67°C/W 225mm2 2500mm2 2500mm2 70°C/W 100mm2 2500mm2 2500mm2 75°C/W 50mm2 2500mm2 2500mm2 85°C/W *Device is mounted on the topside. Calculating Junction Temperature Example: Given an output voltage of 3.3V, an input voltage range of 12V ±5%, an output current range of 0mA to 20mA and a maximum ambient temperature of 85°C, what will the maximum junction temperature be? The power dissipated by the device is equal to: IOUT(MAX) (VIN(MAX) – VOUT) + IGND (VIN(MAX)) where, IOUT(MAX) = 20mA VIN(MAX) = 12.6V IGND at (IOUT = 20mA, VIN = 12.6V) = 0.3mA So, P = 20mA(12.6V – 3.3V) + 0.3mA(12.6V) = 189.8mW The thermal resistance ranges from 65°C/W to 85°C/W depending on the copper area. So, the junction temperature rise above ambient approximately equals: 0.1898W(75°C/W) = 14.2°C 3007fa For more information www.linear.com/LT3007 13 LT3007 Series APPLICATIONS INFORMATION The maximum junction temperature equals the maximum junction temperature rise above ambient plus the maximum ambient temperature or: TJ(MAX) = 85°C + 14.2°C = 99.2°C High Temperature Operation Care must be taken when designing LT3007 applications to operate at high ambient temperatures. The LT3007 works at elevated temperatures but erratic operation can occur due to unforeseen variations in external components. Some tantalum capacitors are available for high temperature operation, but ESR is often several Ohms; capacitor ESR above 3Ω is unsuitable for use with the LT3007. Ceramic capacitor manufacturers (Murata, AVX, TDK, and Vishay at the time of this writing) now offer ceramic capacitors that are rated to 150°C using an X8R dielectric. Device instability will occur if the output capacitor value and ESR are outside design limits at elevated temperature and operating DC voltage bias (see information on capacitor characteristics under Output Capacitance and Transient Response). Check each passive component for absolute value and voltage ratings over the operating temperature range. 10 Leakage in capacitors, or from solder flux left after insufficient board cleaning, adversely affects the low quiescent current operation. Consider junction temperature increase due to power dissipation in both the junction and nearby components to ensure maximum specifications are not violated for the LT3007 or external components. 2.0 VOUT = 0V VADJ = 0V 1.8 8 POWER DEVICE LEAKAGE (μA) POWER DEVICE LEAKAGE (μA) 9 Operation of the LT3007 at temperatures above 125°C requires careful selection of external components to ensure output regulation, stability and optimal transient response. Figures 9 and 10 have curves showing power device leakage (from IN to OUT) for the LT3007 in both active and shutdown states. The minimum external load must be greater than this leakage to prevent the OUT pin from rising out of regulation due to power device leakage. Power device leakage decreases if the LT3007 is active; if IN is tied directly to SHDN, the minimum required load is reduced. The recommended minimum external load is 20µA. The use of a feedforward capacitor is required for operation at temperatures above 135°C (see Feedforward Capacitance section). For output voltages of 1.2V and above, the feedforward capacitor ensures good transient response. Use of the LT3007 at temperatures above 135°C and output voltages under 1.2V is not advised. 7 6 VIN = 45V 5 4 3 VIN = 2.1V 2 1 0 100 VOUT = 0V VADJ = 0.7V 1.6 1.4 1.2 VIN = 45V 1 0.8 0.6 VIN = 2.1V 0.4 0.2 110 120 130 140 TEMPERATURE (°C) 0 100 150 3007 F09 Figure 9. Power Device Leakage, SHDN = 0V 110 120 130 140 TEMPERATURE (°C) 150 3007 F10 Figure 10. Power Device Leakage, SHDN = 1.5V 3007fa 14 For more information www.linear.com/LT3007 LT3007 Series APPLICATIONS INFORMATION Protection Features The LT3007 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 output of the device. For normal operation, do not exceed a junction temperature of 125°C. The typical thermal shutdown circuitry temperature threshold is 160°C. The IN pin withstands reverse voltages of 50V. The device limits current flow to less than 30µA (typically less than 1µA) and no negative voltage appears at OUT. The device protects both itself and the load against batteries that are plugged in backwards. The SHDN pin cannot be driven below GND unless tied to the IN pin. If the SHDN pin is driven below GND while IN is powered, the output will turn on. SHDN pin logic cannot be referenced to a negative rail. The LT3007 incurs no damage if OUT is pulled below ground. If IN is left open circuit or grounded, OUT can be pulled below ground by 50V. No current flows from the pass transistor connected to OUT. However, current flows in (but is limited by) the resistor divider that sets 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 IN is powered by a voltage source, OUT sources current equal to its current limit capability and the LT3007 protects itself by thermal limiting if necessary. In this case, grounding the SHDN pin turns off the LT3007 and stops OUT from sourcing current. The LT3007 incurs no damage if the ADJ pin is pulled above or below ground by 50V. If IN is left open circuit or grounded, ADJ acts like a 100k resistor in series with a diode when pulled above or below ground. In circuits where a backup battery is required, several different input/output conditions can occur. The output voltage may be held up while the input is either pulled to ground, pulled to some intermediate voltage or is left open circuit. Current flow back into the output follows the curve shown in Figure 11. 100 REVERSE CURRENT (µA) 90 80 70 ADJ CURRENT 60 50 40 30 20 OUT CURRENT 10 0 0 1 2 3 4 5 6 7 8 9 OUTPUT AND ADJ VOLTAGE (V) 10 3007 F11 Figure 11. Reverse-Output Current 3007fa For more information www.linear.com/LT3007 15 LT3007 Series APPLICATIONS INFORMATION If the LT3007 IN pin is forced below the OUT pin or the OUT pin is pulled above the IN pin, input current typically drops to less than 1µA. This occurs if the LT3007 input is connected to a discharged (low voltage) battery and either a backup battery or a second regulator circuit holds up the output. The state of the SHDN pin has no effect in the reverse current if OUT is pulled above IN. Fault Tolerance The LT3007 regulators tolerate single fault conditions. Shorting two adjacent pins together or leaving one single pin floating does not increase VOUT above its regulated value or cause damage to the LT3007 regulators. However, the application circuit must meet the requirements discussed in this section to achieve this tolerance level. Tables 4 and 5 show the effects that result from shorting adjacent pins or from a floating pin, respectively. Table 4: Effects of Pin-to-Pin Shorts PIN NUMBERS PIN NAMES 1-2 SHDN-GND 2-3 GND-GND 3-4 GND-GND 5-6 IN-NC 6-7 NC-OUT 7-8 OUT-ADJ 7-8 EFFECT LT3007 is in Micropower Shutdown, VOUT is Off No Effect. Pins 2, 3 and 4 are Normally Tied to GND No Effect. Pins 2, 3 and 4 are Normally Tied to GND No Effect as Long as NC is Floating No Effect as Long as NC is Floating VOUT Decreases to 600mV as the Top Resistor in the VOUT Divider is Shorted OUT-SENSE No Effect as These Two Pins are Normally Shorted Together COMMENT LT3007 Adjustable Version LT3007 Fixed Voltage version. Table 5: Effects of Floating Pins PIN NUMBER 1 2 3 4 5 6 7 8 8 PIN NAME SHDN GND GND GND IN NC OUT ADJ SENSE EFFECT LT3007 is in Micropower Shutdown, VOUT is Off No Effect as Long as Pins 3 or 4 are Tied to GND No Effect as Long as Pins 2 or 4 are Tied to GND No Effect as Long as Pins 2 or 3 are Tied to GND LT3007 Has No Input Power, VOUT is Off No Effect VOUT Internal to LT3007 is ≅ VIN. VOUT Externally Decreases to 0V VOUT Decreases to Less Than Regulated VOUT VOUT Increases to ≅ VIN Unless an External Clamp is Added COMMENT LT3007 Adjustable Version LT3007 Fixed Voltage version. 3007fa 16 For more information www.linear.com/LT3007 LT3007 Series TYPICAL APPLICATIONS Keep-Alive Power Supply NO PROTECTION DIODES NEEDED! VIN 12V IN 1µF 3.3V OUT 2.2µF LT3007-3.3 SHDN LOAD: SYSTEM MONITOR, VOLATILE MEMORY, ETC. SENSE GND 3007 TA02 Last-Gasp Circuit VLINE 12V TO 15V LINE POWER RLIMIT IN SUPERCAP SENSE DCHARGE 1µF OUT LT3007-5 SHDN LINE INTERRUPT DETECT 5V PWR 2.2µF FAULT GND TO MONITORING CENTER 3007 TA03 SENSE GND 3007fa For more information www.linear.com/LT3007 17 LT3007 Series PACKAGE DESCRIPTION Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings. TS8 Package 8-Lead Plastic TSOT-23 (Reference LTC DWG # 05-08-1637 Rev A) 0.40 MAX 2.90 BSC (NOTE 4) 0.65 REF 1.22 REF 1.4 MIN 3.85 MAX 2.62 REF 2.80 BSC 1.50 – 1.75 (NOTE 4) PIN ONE ID RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 0.22 – 0.36 8 PLCS (NOTE 3) 0.65 BSC 0.80 – 0.90 0.20 BSC 0.01 – 0.10 1.00 MAX DATUM ‘A’ 0.30 – 0.50 REF 0.09 – 0.20 (NOTE 3) 1.95 BSC TS8 TSOT-23 0710 REV A NOTE: 1. DIMENSIONS ARE IN MILLIMETERS 2. DRAWING NOT TO SCALE 3. DIMENSIONS ARE INCLUSIVE OF PLATING 4. DIMENSIONS ARE EXCLUSIVE OF MOLD FLASH AND METAL BURR 5. MOLD FLASH SHALL NOT EXCEED 0.254mm 6. JEDEC PACKAGE REFERENCE IS MO-193 3007fa 18 For more information www.linear.com/LT3007 LT3007 Series REVISION HISTORY REV DATE DESCRIPTION PAGE NUMBER A 11/14 Added H-grade 2 to 5 Modified Conditions for Current Limit graph 7 Updated Load Regulation graph 8 Modified High Temperature section in Applications Information 10 Added Feedforward Capacitance section 12 Added High Temperature Operation section 14 3007fa 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/LT3007 19 LT3007 Series TYPICAL APPLICATION Average Power Savings for Low Duty Cycle Applications 0mA to 10mA Pulsed Load, IN = 12V Low Duty Cycle Applications 100 IN 1µF OUT 90 2.2µF LT3007-3.3 SHDN SENSE GND 80 LOW DUTY CYCLE PULSED LOAD 0mA TO 10mA 3007 TA04a POWER SAVINGS (%) VIN 12V 3.3V 70 60 100µA IQ 50 40 30µA IQ 30 20 10 0 0.1 10µA IQ 1 10 DUTY CYCLE (%) 3007 TA04b RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1761 100mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 20µA, ISD < 1µA, Low Noise: < 20µVRMS , Stable with 1µF Ceramic Capacitors, ThinSOTTM Package LT1762 150mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 25µA, ISD < 1µA, Low Noise: < 20µVRMS , MS8 Package LT1763 500mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 30µA, ISD < 1µA, Low Noise: < 20µVRMS , S8 Package LT1764/LT1764A 3A, Low Noise, Fast Transient Response LDOs VIN : 2.7V to 20V, VOUT = 1.21V, VDO = 0.34V, IQ = 1mA, ISD < 1µA, Low Noise: < 40µVRMS , LT1764A Version Stable with Ceramic Capacitors, DD and TO220-5 Packages LT1962 300mA, Low Noise Micropower LDO VIN : 1.8V to 20V, VOUT(MIN) = 1.22V, VDO = 0.27V, IQ = 30µA, ISD < 1µA, Low Noise: < 20µVRMS , MS8 Package LT1963/LT1963A 1.5A, Low Noise, Fast Transient Response LDOs VIN : 2.1V to 20V, VOUT(MIN) = 1.21V, VDO = 0.34V, IQ = 1mA, ISD < 1µA, Low Noise: < 40µVRMS , LT1963A Version Stable with Ceramic Capacitors, DD, TO220-5, SOT223 and S8 Packages LT3008 20mA, 45V, 3µA IQ Micropower LDO 300mV Dropout Voltage, Low IQ: 3µA, VIN: 2V to 45V, VOUT: 0.6V to 39.5V, ThinSOT and 2mm × 3mm DFN-6 Packages LT3009 20mA, 3µA IQ Micropower LDO VIN : 1.6V to 20V, Low IQ: 3µA, VDO = 0.28V, 2mm × 2mm DFN and SC70-8 Packages LT3020 100mA, Low Voltage VLDO VIN : 0.9V to 10V, VOUT(MIN) = 0.20V, VDO = 0.15V, IQ = 120µA, ISD < 1µA, 3mm × 3mm DFN and MS8 Packages LT3021 500mA, Low Voltage VLDO VIN : 0.9V to 10V, VOUT(MIN) = 0.20V, VDO = 0.16V, IQ = 120µA, ISD < 3µA, 5mm × 5mm DFN and SO8 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, SOT-223, MSOP and 3mm × 3mm DFN Packages; LT3080-1 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-8 and 2mm × 3mm DFN Packages 500mA, Parallelable, Low Noise, Low Dropout Linear Regulator 3007fa 20 Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 For more information www.linear.com/LT3007 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com/LT3007 LT 1114 REV A • PRINTED IN USA LINEAR TECHNOLOGY CORPORATION 2013