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3007faFor more information www.linear .com/L T3007 TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
3µA IQ, 20mA, 45V Low Dropout Fault Tolerant Linear Regulators 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 quies- cent 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 reverse- current 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 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. 3.3V, 20mA Supply with Shutdown n 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 (VADJ = VOUT(MIN) = 600mV) n Output Tolerance: ±2% Over Load, Line and T emperature 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 Automotive n Low Current Battery-Powered Systems n Keep-Alive Power Supplies n Remote Monitoring n Utility Meters n Low Power Industrial Applications Dropout Voltage/Quiescent Current L, LT, LT C, LT M, 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. TEMPERATURE (°C) DROPOUT VOLTAGE (mV) QUIESCENT CURRENT (µA)400
3007 TA01b
–50 –25 0 25 50 75 100 125 150 ILOAD = 20mA DROPOUT VOLTAGE IQ IN SHDN 2.2µF
3007 TA01a
3.8V TO 45V GND LT3007-3.3 VOUT 3.3V 20mA1µF
3007fa For more information www.linear .com/L T3007 PIN CONFIGURATIONABSOLUTE MAXIMUM RATINGS OU In A SENSE SH O definite Operating Junction Temperature Range (Notes 2, 4) E-, 0°C to 125°C H-Gr 0°C to 150°C 5°C to 150°C 0°C (Note 1) SHDN 1 GND 2 GND 3 GND 4
8 ADJ
7 OUT
TJMAX = 150°C, θJA = 65°C/W TO 85°C/W* SHDN 1 GND 2 GND 3 GND 4
8 SENSE
TJMAX = 125°C, θJA = 65°C/W TO 85°C/W* ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE LT3007ETS8#PBF LT3007ETS8#TRPBF L TGJW 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8#PBF LT3007ITS8#TRPBF L TGJW 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007HTS8#PBF LT3007HTS8#TRPBF L TGJW 8-Lead Plastic TSOT-23 –40°C to 150°C LT3007ETS8-1.2#PBF LT3007ETS8-1.2#TRPBF L TGKB 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-1.2#PBF LT3007ITS8-1.2#TRPBF L TGKB 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-1.5#PBF LT3007ETS8-1.5#TRPBF L TGKD 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-1.5#PBF LT3007ITS8-1.5#TRPBF L TGKD 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-1.8#PBF LT3007ETS8-1.8#TRPBF L TGJZ 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-1.8#PBF LT3007ITS8-1.8#TRPBF L TGJZ 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-2.5#PBF LT3007ETS8-2.5#TRPBF L TGJX 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-2.5#PBF LT3007ITS8-2.5#TRPBF L TGJX 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-3.3#PBF LT3007ETS8-3.3#TRPBF L TGKC 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-3.3#PBF LT3007ITS8-3.3#TRPBF L TGKC 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ETS8-5#PBF LT3007ETS8-5#TRPBF L TGJY 8-Lead Plastic TSOT-23 –40°C to 125°C LT3007ITS8-5#PBF LT3007ITS8-5#TRPBF L TGJY 8-Lead Plastic TSOT-23 –40°C to 125°C Consult LT C 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/ * See the Applications Information Section.
3007faFor more information www.linear .com/L T3007 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 MIN TYP MAX UNITS Operating Voltage l 2 45 V Regulated Output Voltage LT3007-1.2: VIN = 2V, ILOAD = 100µA 2V < VIN < 45V, 1µA < ILOAD < 20mA l 1.188 1.176 1.2 1.2 1.212 1.224 V V LT3007-1.5: V IN = 2.05V, ILOAD = 100µA 2.05V < VIN < 45V, 1µA < ILOAD < 20mA l 1.485 1.47 1.5 1.5 1.515 1.53 V V LT3007-1.8: V IN = 2.35V, ILOAD = 100µA 2.35V < VIN < 45V, 1µA < ILOAD < 20mA l 1.782 1.764 1.8 1.8 1.818 1.836 V V LT3007-2.5: V IN = 3.05V, ILOAD = 100µA 3.05V < VIN < 45V, 1µA < ILOAD < 20mA l 2.475 2.45 2.5 2.5 2.525 2.55 V V LT3007-3.3: V IN = 3.85V, ILOAD = 100µA 3.85V < VIN < 45V, 1µA < ILOAD < 20mA l 3.267 3.234 3.3 3.3 3.333 3.366 V V LT3007-5: V IN = 5.55V, ILOAD = 100µA 5.55V < VIN < 45V, 1µA < ILOAD < 20mA l 4.95 4.9 5.05 5.1 V V ADJ Pin V oltage (Notes 3, 4) VIN = 2V, ILOAD = 100µA 2V < VIN < 45V, 1µA < ILOAD < 20mA (E-, I-Grades) 2V < VIN < 45V, 20µA < ILOAD < 20mA (H-Grade) l l 594 588 582 600 600 606 612 612 mV mV mV Line Regulation (Note 3) LT3007-1.2: ∆V IN = 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 l l l l l l l l 1.2 1.5 1.8 2.5 3.3 0.6 0.6 7.5 12.5 16.5 mV mV mV mV mV mV mV mV Load Regulation (Note 3) LT3007-1.2: VIN = 2V, ILOAD = 1µA to 10mA VIN = 2V, ILOAD = 1µA to 20mA l l 0.8 mV mV LT3007-1.5: VIN = 2.05V, ILOAD = 1µA to 10mA VIN = 2.05V, ILOAD = 1µA to 20mA l l 1.3 mV mV LT3007-1.8: VIN = 2.35V, ILOAD = 1µA to 10mA VIN = 2.35V, ILOAD = 1µA to 20mA l l 1.2 1.5 mV mV LT3007-2.5: VIN = 3.05V, ILOAD = 1µA to 10mA VIN = 3.05V, ILOAD = 1µA to 20mA l l 1.7 2.1 8.3 mV mV LT3007-3.3: VIN = 3.85V, ILOAD = 1µA to 10mA VIN = 3.85V, ILOAD = 1µA to 20mA l l 2.2 2.8 mV mV LT3007-5: VIN = 5.55V, ILOAD = 1µA to 10mA VIN = 5.55V, ILOAD = 1µA to 20mA l l 3.4 4.2 mV mV LT3007 (E-, I-Grades): V IN = 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 l l l l 0.4 0.5 0.4 0.5 mV mV mV mV Dropout V oltage VIN = VOUT(NOMINAL) (Notes 5, 6) ILOAD = 100µA ILOAD = 100µA (E-, I-Grades) ILOAD = 100µA (H-Grade) l l 115 180 250 290 mV mV mV I LOAD = 1mA ILOAD = 1mA (E-, I-Grades) ILOAD = 1mA (H-Grade) l l 170 250 350 390 mV mV mV I LOAD = 10mA ILOAD = 10mA (E-, I-Grades) ILOAD = 10mA (H-Grade) l l 270 340 470 510 mV mV mV I LOAD = 20mA ILOAD = 20mA (E-, I-Grades) ILOAD = 20mA (H-Grade) l l 300 365 500 540 mV mV mV
3007fa For more information www.linear .com/L T3007 PARAMETER CONDITIONS MIN TYP MAX UNITS Quiescent Current (Notes 6, 7) ILOAD = 0µA (E-, I-Grades) ILOAD = 0µA (H-Grade) l l 3 6 µA µA GND Pin Current VIN = VOUT(NOMINAL) + 0.5V (Notes 6, 7) ILOAD = 0µA (E-, I-Grades) ILOAD = 0µA (H-Grade) ILOAD = 100µA (E-, I-Grades) ILOAD = 100µA (H-Grade) ILOAD = 1mA ILOAD = 10mA ILOAD = 20mA l l l l l l l 160 350 500 1200 µA µA µA µA µA µA µA Output V oltage Noise (Note 9) COUT = 2.2µF, ILOAD = 20mA, BW = 10Hz to 100kHz 92 µVRMS ADJ Pin Bias Current –10 0.4 10 nA Shutdown Threshold VOUT = Off to On VOUT = On to Off l l 0.25 0.67 0.61 1.5 V V SHDN Pin Current VSHDN = 0V, VIN = 45V VSHDN = 45V, VIN = 45V l l 0.65 µA µA Quiescent Current in Shutdown VIN = 6V, VSHDN = 0V (E-, I-Grades) VIN = 6V, VSHDN = 0V (H-Grade) l l µA µA Ripple Rejection (Note 3) 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 dB dB dB dB dB dB dB Current Limit (Note 3) V IN = 45V, VOUT = 0 VIN = VOUT(NOMINAL) + 1V, ∆VOUT = – 5% l 75 mA mA Input Reverse-Leakage Current VIN = –45V, VOUT = 0 l 1 30 µA Reverse-Output Current VOUT = 1.2V, VIN = 0 0.6 10 µA 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 T J @ 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. 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 (V IN – 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 V OUT 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 V IN = 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 cur ves 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. ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating temperature range, otherwise specifications are at TJ = 25°C. (Note 2)
3007faFor more information www.linear .com/L T3007 Dropout Voltage Dropout Voltage Minimum Input Voltage Output Voltage LT3007-1.8 Output Voltage LT3007-3.3Output Voltage LT3007-2.5 ADJ Pin Voltage Output Voltage LT3007-1.2 Output Voltage LT3007-1.5 TEMPERATURE (°C) DROPOUT VOL TAGE (mV) 150 200 250 450 100 300 350 400
3007 G02
100µA –50 –25 0 25 50 75 100 125 150 0.6 0.4 0.2 0.8 1.2 1.4 1.6 1.8 2.0 TEMPERATURE (°C) MINIMUM INPUT VOLTAGE (V)
3007 G03
ILOAD = 20mA –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) ADJ PIN VOLTAGE (V)
3007 G04
0.596 0.608 0.610 0.612 0.590 0.592 0.604 0.600 0.594 0.606 0.588 0.602 0.598 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3007 G05
1.192 1.216 1.220 1.224 1.180 1.184 1.208 1.200 1.188 1.212 1.176 1.204 1.196 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3007 G06
1.490 1.520 1.525 1.530 1.475 1.480 1.510 1.500 1.485 1.515 1.470 1.505 1.495 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3007 G07
1.788 1.824 1.830 1.836 1.770 1.776 1.812 1.800 1.782 1.816 1.764 1.806 1.794 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3007 G08
2.480 2.540 2.550 2.460 2.520 2.500 2.470 2.530 2.450 2.510 2.490 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3007 G09
3.267 3.278 3.355 3.366 3.245 3.322 3.300 3.256 3.333 3.344 3.234 3.311 3.289 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. OUTPUT CURRENT (mA) DROPOUT VOL TAGE (mV) 150 200 250 5 20 450 100 10 15 300 350 400
3007 G01
TJ = 150°C TJ = 25°C TJ = 125°C
3007fa For more information www.linear .com/L T3007 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. GND Pin Current LT3007-1.2 GND Pin Current LT3007-1.5 GND Pin Current LT3007-1.8 GND Pin Current LT3007-2.5 GND Pin Current LT3007-3.3 Quiescent Current Output Voltage LT3007-5 ADJ Pin Bias Current Adjustable Quiescent Current TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3007 G10
4.950 5.075 5.100 5.025 5.000 4.925 5.050 4.900 4.975 –50 –25 0 25 50 75 100 125 150 ILOAD = 100µA TEMPERATURE (°C) ADJ PIN BIAS CURRENT (nA)
3007 G11
–10 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) QUIESCENT CURRENT (µA)
3007 G12
–50 –25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) QUIESCENT CURRENT (µA)
3007 G13
L T3007-1.2 L T3007-1.5 L T3007-1.8 L T3007-2.5 L T3007-3.3 L T3007-5 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3007 G14
INPUT VOLTAGE (V) GND PIN CURRENT (µA) RL = 60/uni03A9, IL = 20mA RL = 120/uni03A9, IL = 10mA RL = 1.2k, IL = 1mA RL = 12k, IL = 100µA 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3007 G15
INPUT VOLTAGE (V) GND PIN CURRENT (µA) RL = 75/uni03A9, IL = 20mA RL = 150/uni03A9, IL = 10mA RL = 1.5k, IL = 1mA RL = 15k, IL = 100µA 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3007 G16
INPUT VOLTAGE (V) GND PIN CURRENT (µA) RL = 90/uni03A9, IL = 20mA RL = 180/uni03A9, IL = 10mA RL = 1.8k, IL = 1mA RL = 18k, IL = 100µA 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3007 G17
INPUT VOLTAGE (V) GND PIN CURRENT (µA) RL = 125/uni03A9, IL = 20mA RL = 250/uni03A9, IL = 10mA RL = 2.5k, IL = 1mA RL = 25k, IL = 100µA 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3007 G18
INPUT VOLTAGE (V) GND PIN CURRENT (µA) RL = 165/uni03A9, IL = 20mA RL = 330/uni03A9, IL = 10mA RL = 3.3k, IL = 1mA RL = 33k, IL = 100µA
3007faFor more information www.linear .com/L T3007 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. SHDN Pin Input Current SHDN Pin Input Current Current Limit Reverse-Output Current Input Ripple Rejection Input Ripple Rejection GND Pin Current LT3007-5 GND Pin Current vs ILOAD SHDN Pin Thresholds 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3007 G19
INPUT VOLTAGE (V) GND PIN CURRENT (µA) RL = 250/uni03A9, IL = 20mA RL = 500/uni03A9, IL = 10mA RL = 5k, IL = 1mA RL = 50k, IL = 100µA 100 1000 LOAD (mA) GND CURRENT (µA)
3007 G20
0.001 0.01 0.1 1 10 100 VIN = 3.8V VOUT = 3.3V –50 0.6 1.4 1.5 0 75 0.3 1.2 1.1 0.4 0.5 1.3 0.1 0.2 0.9 0.8 0.7 –25 25 15050 100 125
3007 G21
TEMPERATURE (°C) SHDN PIN THRESHOLD (V) OFF TO ON ON TO OFF 0.8 1.8 2.0 10 20 30 0.4 1.4 0.6 1.6 0.2 1.2 5 15 4525 35 40
3007 G22
SHDN PIN VOLTAGE (V) SHDN PIN INPUT CURRENT (µA) –50 0.8 2.0 0 25 75 0.4 1.6 0.6 1.8 0.2 1.4 1.2 –25 100 15050 125
3007 G23
TEMPERATURE (°C) SHDN PIN INPUT CURRENT (µA) VSHDN = 45V 40 100
3007 G24
TEMPERATURE (°C) CURRENT LIMIT (mA) –50 0 75–25 25 15050 100 125 VIN = 2V VIN = 45V VOUT = 0V
3007 G25
TEMPERATURE (°C) REVERSE OUTPUT CURRENT (µA) –50 0 75–25 25 15050 100 125 OUT ADJ OUT = ADJ = 1.2V IN = SHDN = GND FREQUENCY (Hz)
3007 G26
10 100 1000 10000010000 1000000 INPUT RIPPLE REJECTION (dB) VIN = 2.1V + 50mVRMS VOUT = 600mV ILOAD = 20mA COUT = 10µF COUT = 2.2µF INPUT RIPPLE REJECTION (dB)
3007 G27
TEMPERATURE (°C) –50 0 75–25 25 15050 100 125 VIN = VOUT (NOMINAL) + 2V + 0.5VP-P RIPPLE AT f = 120Hz ILOAD = 20mA
3007fa For more information www.linear .com/L T3007 TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. T ransient Response T ransient Response T ransient Response (Load Dump) Load Regulation Output Noise Spectral Density RMS Output Noise vs Load Current FREQUENCY (Hz) 0.1 OUTPUT NOISE SPECTRAL DENSITY (µV√Hz) 100
3007 G29
3.3V 2.5V 1.8V 1.5V 0.6V COUT = 2.2µF ILOAD = 20mA ILOAD (mA) 0.001 350 450 400 500
3007 G30
0.01 0.1 1 100 200 100 150 OUTPUT NOISE (µVRMS) 3.3V 2.5V 1.8V 1.2V 0.6V 1.5V 5VCOUT = 10µF 500µs/DIV VOUT 50mV/DIV IOUT 20mA/DIV
3007 G31
IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 2.2µF 500µs/DIV VOUT 50mV/DIV IOUT 20mA/DIV
3007 G32
IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 10µF 1ms/DIV VOUT 50mV/DIV 45V 12VVIN 10V/DIV
3007 G33
VOUT = 5V IOUT = 20mA COUT = 4.7µF TEMPERATURE (°C) LOAD REGULATION (mV)
3007 G28
–50 –25 0 25 50 75 100 125 150 ∆IL = 1/uni03BCA TO 20mA VOUT = 0.6V VIN = 2.1V ∆IL = 20/uni03BCA TO 20mA
pin cannot be driven below GND unless tied to the IN pin. IN (Pin 5): Input. The IN pin supplies power to the device. OUT (Pin 7): Output. This pin supplies power to the load. output capacitance and reverse-output characteristics. output voltage range is 600mV to 44.5V. and still allow the device to start and operate. Figure 1. Kelvin Sense Connection
3007 F01
down. The device supplies up to 20mA of output current. against both reverse-input and reverse-output voltages. without affecting start-up or normal operation. High Temperature Operation Section for more information. The LT3007 has an output voltage range of 0.6V to 44.5V . in the Typical Performance Characteristics. output voltages with a resistor divider current of about 1µA. Figure 2. Adjustable Operation Table 1. Output Voltage Resistor Divider Values
3007 F02
output transients or ripple.
Figure 3. Ceramic Capacitor DC Bias Characteristics Figure 4. Ceramic Capacitor Temperature Characteristics load transient response is a function of output capacitance. larger load current changes. Give extra consideration to the use of ceramic capacitors.
3007 F03
1210 CASE SIZE, 10µF
3007 F04
range and maximum capacitance change over temperature. capacitance at operating voltage should be verified. induced by vibrations in the system or thermal transients.
Figure 5’s trace in response to light tapping from a pencil. increased output voltage noise. Table 2. Feedforward Capacitor Values Figure 6. Feedforward Capacitor Figure 7. T ransient Response with Figure 8. T ransient Response with
3007 F06
3007 F07
3007 F08
Figure 5. Noise Resulting from Tapping
3007 F05
nearest standard capacitor value. proportional to the feedback resistor divider current.
3007faFor more information www.linear .com/L T3007 APPLICATIONS INFORMATION layer GND planes achieves 45°C/W thermal resistance. This is approximately a 30% improvement over the lowest numbers shown in Table 3. Thermal Considerations The LT3007’s maximum rated junction temperature of 125°C limits its power-handling capability. Two compo- nents 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 Cur- rent cur ves 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 con- tinuous normal conditions, do not exceed the maximum junction temperature rating of 125°C. Carefully consider all sources of thermal resistance from junction to ambi - ent 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 stiffen- ers 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 bet- ter 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 Table 3: Measured Thermal Resistance for TSOT-23 Package COPPER AREA BOARD AREA THERMAL RESIST ANCE (JUNCTION-TO-AMBIENT)TOPSIDE* BACKSIDE 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 volt- age 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, 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: 0.1898 W(75°C/W) = 14.2°C
due to unforeseen variations in external components. ESR above 3Ω is unsuitable for use with the LT3007. capacitors that are rated to 150°C using an X8R dielectric. from rising out of regulation due to power device leakage. and output voltages under 1.2V is not advised. violated for the LT3007 or external components. Figure 9. Power Device Leakage, SHDN = 0V Figure 10. Power Device Leakage, SHDN = 1.5V
3007 F09
3007 F10
Figure 11. Reverse-Output Current
3007 F11
cuitry temperature threshold is 160°C. that are plugged in backwards. be referenced to a negative rail. LT3007 and stops OUT from sourcing current. diode when pulled above or below ground.
3007fa For more information www.linear .com/L T3007 APPLICATIONS INFORMATION Table 5: Effects of Floating Pins PIN NUMBER PIN NAME EFFECT COMMENT
1 SHDN LT3007 is in Micropower Shutdown, V OUT is Off
2 GND No Effect as Long as Pins 3 or 4 are Tied to GND
3 GND No Effect as Long as Pins 2 or 4 are Tied to GND
4 GND No Effect as Long as Pins 2 or 3 are Tied to GND
5 IN LT3007 Has No Input Power, V
6 NC No Effect
7 OUT V
OUT Internal to LT3007 is @ VIN. VOUT Externally Decreases to 0V
8 ADJ V OUT Decreases to Less Than Regulated VOUT LT3007 Adjustable Version
8 SENSE V OUT Increases to @ VIN Unless an External Clamp is Added LT3007 Fixed Voltage version. 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. Table 4: Effects of Pin-to-Pin Shorts PIN NUMBERS PIN NAMES EFFECT COMMENT 1-2 SHDN-GND LT3007 is in Micropower Shutdown, V OUT is Off 2-3 GND-GND No Effect. Pins 2, 3 and 4 are Normally Tied to GND 3-4 GND-GND No Effect. Pins 2, 3 and 4 are Normally Tied to GND 5-6 IN-NC No Effect as Long as NC is Floating 6-7 NC-OUT No Effect as Long as NC is Floating 7-8 OUT-ADJ V OUT Decreases to 600mV as the Top Resistor in the VOUT Divider is Shorted LT3007 Adjustable Version 7-8 OUT-SENSE No Effect as These Tw o Pins are Normally Shorted Together LT3007 Fixed Voltage version. Fault Tolerance The LT3007 regulators tolerate single fault conditions. Shorting two adjacent pins together or leaving one single pin floating does not increase V OUT above its regulated value or cause damage to the LT3007 regulators. How- ever, 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.
3007faFor more information www.linear .com/L T3007 TYPICAL APPLICATIONS Keep-Alive Power Supply Last-Gasp Circuit IN SHDN 3.3V
3007 TA02
1µF 2.2µF SENSE GND L T3007-3.3 NO PROTECTION DIODES NEEDED! VIN 12V LOAD: SYSTEM MONITOR, VOLATILE MEMORY, ETC. IN SHDN
3007 TA03
1µFSUPERCAP 2.2µF SENSE PWR TO MONITORING CENTER SENSE GND GNDL T3007-5 LINE POWERV LINE 12V TO 15V DCHARGE RLIMIT LINE INTERRUPT DETECT
3007fa For more information www.linear .com/L T3007 PACKAGE DESCRIPTION 1.50 – 1.75 (NOTE 4)2.80 BSC 0.22 – 0.36
8 PLCS (NOTE 3)
DATUM ‘A’ 0.09 – 0.20 (NOTE 3) TS8 TSOT-23 0710 REV A
2.90 BSC
(NOTE 4)
0.65 BSC
1.95 BSC
0.80 – 0.90
1.00 MAX
0.01 – 0.100.20 BSC 0.30 – 0.50 REF PIN ONE ID 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
3.85 MAX
0.40 MAX 0.65 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 1.4 MIN2.62 REF
1.22 REF
(Reference LTC DWG # 05-08-1637 Rev A) Please refer to http://www.linear.com/designtools/packaging/ for the most recent package drawings.
3007faFor more information www.linear .com/L T3007 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
REVISION HISTORY
REV DATE DESCRIPTION PAGE NUMBER A 11/14 Added H-grade Modified Conditions for Current Limit graph Updated Load Regulation graph Modified High Temperature section in Applications Information Added Feedforward Capacitance section Added High Temperature Operation section 2 to 5
3007fa For more information www.linear .com/L T3007 LINEAR TECHNOLOGY CORPORATION 2013 LT 1114 REV A • PRINTED IN USA Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear .com/L T3007 RELATED PARTS PART NUMBER DESCRIPTION COMMENTS LT1761 100mA, Low Noise Micropower LDO V IN: 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 V IN: 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 25µA, ISD < 1µA, Low Noise: < 20µVRMS, LT1763 500mA, Low Noise Micropower LDO VIN: 1.8V to 20V, VOUT = 1.22V, VDO = 0.3V, IQ = 30µA, ISD < 1µA, Low Noise: < 20µVRMS, LT1764/LT1764A 3A, Low Noise, Fast T ransient 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 V IN: 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 T ransient 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 I Q: 3µA, VIN: 2V to 45V, VOUT: 0.6V to 39.5V, ThinSOT and 2mm × 3mm DFN-6 Packages LT3009 20mA, 3µA IQ Micropower LDO V IN: 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 V oltage (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 500mA, Parallelable, Low Noise, Low Dropout Linear Regulator 275mV Dropout V oltage (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 Low Duty Cycle Applications Average Power Savings for Low Duty Cycle Applications 0mA to 10mA Pulsed Load, IN = 12V TYPICAL APPLICATION IN SHDN 2.2µF 3.3V
3007 TA04a
1µF SENSE GND L T3007-3.3 VIN 12V LOW DUTY CYCLE PULSED LOAD 0mA TO 10mA DUTY CYCLE (%) 0.1 100
3007 TA04b
POWER SAVINGS (%) 10µA IQ 100µA IQ 30µA IQ