LT3008_1 LINER
Document overview
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Technical content
TEMPERATURE (°C) DROPOUT VOLTAGE (mV) QUIESCENT CURRENT (μA)400
3008 TA01b
–50 –25 0 25 50 75 100 125 150 ILOAD = 20mA DROPOUT VOLTAGE IQ TYPICAL APPLICATION
FEATURES
APPLICATIONS
DESCRIPTION
3µA IQ, 20mA, 45V Low Dropout Linear Regulators The L T®3008 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 L T3008 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 L T3008 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 L T3008 is available in the thermally enhanced 6-lead DFN and 8-lead TSOT-23 packages. 3.3V , 20mA Supply with Shutdown 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 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 and 2mm × 2mm DFN Packages n Automotive n Low Current Battery-Powered Systems n Keep-Alive Power Supplies n Remote Monitoring n Utility Meters n Low Power Industrial Applications IN SHDN 2.2μF
3008 TA01a
3.8V TO 45V GND LT3008-3.3 VOUT 3.3V 20mA1μF Dropout Voltage/Quiescent Current L, L T , L TC, L TM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners.
(Note 1) TOP VIEW GND SHDN IN **SENSE/ADJ OUT OUT DC PACKAGE 6-LEAD (2mm s 2mm) PLASTIC DFN TJMAX = 125°C, θJA = 65°C/W TO 85°C/W* EXPOSED PAD (PIN 7) IS GND, MUST BE SOLDERED TO PCB SHDN 1 GND 2 GND 3 GND 4 8 NC
7 ADJ/SENSE**
6 OUT
TJMAX = 125°C, θJA = 65°C/W TO 85°C/W* Operating Junction Temperature Range (Notes 2, 3) Lead Temperature: Soldering, 10 sec ORDER INFORMATION LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE L T3008EDC#PBF L T3008EDC#TRPBF LDPS 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC#PBF L T3008IDC#TRPBF LDPS 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-1.2#PBF L T3008EDC-1.2#TRPBF LFHC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-1.2#PBF L T3008IDC-1.2#TRPBF LFHC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-1.5#PBF L T3008EDC-1.5#TRPBF LFHF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-1.5#PBF L T3008IDC-1.5#TRPBF LFHF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-1.8#PBF L T3008EDC-1.8#TRPBF LFHH 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-1.8#PBF L T3008IDC-1.8#TRPBF LFHH 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-2.5#PBF L T3008EDC-2.5#TRPBF LFHK 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-2.5#PBF L T3008IDC-2.5#TRPBF LFHK 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C * See the Applications Information Section. ** SENSE for Fixed Voltage Output Versions.
LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE L T3008EDC-3.3#PBF L T3008EDC-3.3#TRPBF LFHN 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-3.3#PBF L T3008IDC-3.3#TRPBF LFHN 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-5#PBF L T3008EDC-5#TRPBF LFHQ 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-5#PBF L T3008IDC-5#TRPBF LFHQ 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008ETS8#PBF L T3008ETS8#TRPBF L TDSX 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8#PBF L T3008ITS8#TRPBF L TDSX 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-1.2#PBF L T3008ETS8-1.2#TRPBF L TFHD 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-1.2#PBF L T3008ITS8-1.2#TRPBF L TFHD 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-1.5#PBF L T3008ETS8-1.5#TRPBF L TFHG 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-1.5#PBF L T3008ITS8-1.5#TRPBF L TFHG 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-1.8#PBF L T3008ETS8-1.8#TRPBF L TFHJ 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-1.8#PBF L T3008ITS8-1.8#TRPBF L TFHJ 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-2.5#PBF L T3008ETS8-2.5#TRPBF L TFHM 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-2.5#PBF L T3008ITS8-2.5#TRPBF L TFHM 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-3.3#PBF L T3008ETS8-3.3#TRPBF L TFHP 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-3.3#PBF L T3008ITS8-3.3#TRPBF L TFHP 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-5#PBF L T3008ETS8-5#TRPBF L TFHR 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-5#PBF L T3008ITS8-5#TRPBF L TFHR 8-Lead Plastic TSOT-23 –40°C to 125°C LEAD BASED FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE L T3008EDC L T3008EDC#TR LDPS 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC L T3008IDC#TR LDPS 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-1.2 L T3008EDC-1.2#TR LFHC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-1.2 L T3008IDC-1.2#TR LFHC 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-1.5 L T3008EDC-1.5#TR LFHF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-1.5 L T3008IDC-1.5#TR LFHF 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-1.8 L T3008EDC-1.8#TR LFHH 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-1.8 L T3008IDC-1.8#TR LFHH 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-2.5 L T3008EDC-2.5#TR LFHK 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-2.5 L T3008IDC-2.5#TR LFHK 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-3.3 L T3008EDC-3.3#TR LFHN 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-3.3 L T3008IDC-3.3#TR LFHN 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008EDC-5 L T3008EDC-5#TR LFHQ 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008IDC-5 L T3008IDC-5#TR LFHQ 6-Lead (2mm × 2mm) Plastic DFN –40°C to 125°C L T3008ETS8 L T3008ETS8#TR L TDSX 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8 L T3008ITS8#TR L TDSX 8-Lead Plastic TSOT-23 –40°C to 125°C
ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TJ = 25°C. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Operating Voltage l 24 5 V Regulated Output Voltage L T3008-1.2: V IN = 2V , ILOAD = 100μA 2V < VIN < 45V , 1μA < ILOAD < 20mA l 1.188 1.176 1.2 1.2 1.212 1.224 V V L T3008-1.5: 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 L T3008-1.8: VIN = 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 L T3008-2.5: 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 L T3008-3.3: VIN = 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 L T3008-5: 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 Voltage (Notes 3, 4) V IN = 2V , ILOAD = 100μA 2V < VIN < 45V , 1μA < ILOAD < 20mA l 594 588 600 600 606 612 mV mV Line Regulation (Note 3) L T3008-1.2: ΔV IN = 2V to 45V , ILOAD = 1mA L T3008-1.5: ΔVIN = 2.05V to 45V , ILOAD = 1mA L T3008-1.8: ΔVIN = 2.35V to 45V , ILOAD = 1mA L T3008-2.5: ΔVIN = 3.05V to 45V , ILOAD = 1mA L T3008-3.3: ΔVIN = 3.85V to 45V , ILOAD = 1mA L T3008-5: ΔVIN = 5.55V to 45V , ILOAD = 1mA L T3008: ΔVIN = 2V to 45V , ILOAD = 1mA l l l l l l l 1.2 1.5 1.8 2.5 3.3 0.6 7.5 12.5 16.5 mV mV mV mV mV mV mV LEAD FREE FINISH TAPE AND REEL PART MARKING* PACKAGE DESCRIPTION TEMPERATURE RANGE L T3008ETS8-1.2 L T3008ETS8-1.2#TR L TFHD 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-1.2 L T3008ITS8-1.2#TR L TFHD 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-1.5 L T3008ETS8-1.5#TR L TFHG 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-1.5 L T3008ITS8-1.5#TR L TFHG 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-1.8 L T3008ETS8-1.8#TR L TFHJ 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-1.8 L T3008ITS8-1.8#TR L TFHJ 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-2.5 L T3008ETS8-2.5#TR L TFHM 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-2.5 L T3008ITS8-2.5#TR L TFHM 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-3.3 L T3008ETS8-3.3#TR L TFHP 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-3.3 L T3008ITS8-3.3#TR L TFHP 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ETS8-5 L T3008ETS8-5#TR L TFHR 8-Lead Plastic TSOT-23 –40°C to 125°C L T3008ITS8-5 L T3008ITS8-5#TR L TFHR 8-Lead Plastic TSOT-23 –40°C to 125°C Consult L TC Marketing for parts specifi ed with wider operating temperature ranges. *The temperature grade is identifi ed 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 specifi cations, go to: http://www.linear .com/tapeandreel/ ORDER INFORMATION
PARAMETER CONDITIONS MIN TYP MAX UNITS Load Regulation (Note 3) L T3008-1.2: V IN = 2V , ILOAD = 1μA to 10mA V IN = 2V , ILOAD = 1μA to 20mA l l 0.8 mV mV L T3008-1.5: VIN = 2.05V , ILOAD = 1μA to 10mA V IN = 2.05V , ILOAD = 1μA to 20mA l l 1.3 mV mV L T3008-1.8: VIN = 2.35V , ILOAD = 1μA to 10mA V IN = 2.35V , ILOAD = 1μA to 20mA l l 1.2 1.5 mV mV L T3008-2.5: VIN = 3.05V , ILOAD = 1μA to 10mA V IN = 3.05V , ILOAD = 1μA to 20mA l l 1.7 2.1 8.3 mV mV L T3008-3.3: VIN = 3.85V , ILOAD = 1μA to 10mA V IN = 3.85V , ILOAD = 1μA to 20mA l l 2.2 2.8 mV mV L T3008-5: V IN = 5.55V , ILOAD = 1μA to 10mA V IN = 5.55V , ILOAD = 1μA to 20mA l l 3.4 4.2 mV mV L T3008: V IN = 2V , ILOAD = 1μA to 10mA V IN = 2V , ILOAD = 1μA to 20mA l l 0.4 0.5 mV mV Dropout Voltage VIN = VOUT(NOMINAL) (Notes 5, 6) ILOAD = 100μA ILOAD = 100μA l 115 180 250 mV mV ILOAD = 1mA ILOAD = 1mA l 170 250 350 mV mV ILOAD = 10mA ILOAD = 10mA l 270 340 470 mV mV ILOAD = 20mA ILOAD = 20mA l 300 365 500 mV mV Quiescent Current (Notes 6, 7) I LOAD = 0μA ILOAD = 0μA l μA μA GND Pin Current VIN = VOUT(NOMINAL) + 0.5V (Notes 6, 7) ILOAD = 0μA ILOAD = 100μA ILOAD = 1mA ILOAD = 10mA ILOAD = 20mA l l l l l 160 350 500 1200 μA μA μA μA μA Output Voltage Noise (Note 9) C OUT = 2.2μF , ILOAD = 20mA, BW = 10Hz to 100kHz 92 μV RMS ADJ Pin Bias Current –10 0.4 10 nA Shutdown Threshold V OUT = Off to On VOUT = On to Off l l 0.25 0.67 0.61 1.5 V V SHDN Pin Current V SHDN = 0V , VIN = 45V VSHDN = 45V , VIN = 45V l l 0.65 μA μA Quiescent Current in Shutdown V IN = 6V , VSHDN = 0V l <1 μA Ripple Rejection (Note 3) V IN – VOUT = 2V , VRIPPLE = 0.5VP-P, fRIPPLE = 120Hz, ILOAD = 20mA L T3008 L T3008-1.2 L T3008-1.5 L T3008-1.8 L T3008-2.5 L T3008-3.3 L T3008-5 dB dB dB dB dB dB dB ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TJ = 25°C. (Note 2)
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 L T3008 regulators are tested and specifi ed under pulse load conditions such that T J ≅ TA. The L T3008E is 100% tested at TA=25°C. Performance at – 40°C and 125°C is assured by design, characterization and correlation with statistical process controls. The L T3008I is guaran- teed over the full – 40°C to 125°C operating junction temperature range. Note 3: The L T3008 adjustable version is tested and specifi ed 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 specifi cation 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 specifi ed output current. In dropout, the output voltage equals (V IN – VDROPOUT). For the L T3008-1.2 and L T3008-1.5, dropout voltage will be limited by the minimum input voltage. Note 6: To satisfy minimum input voltage requirements, the L T3008 adjustable version is tested and specifi ed 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 fi xed 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. ELECTRICAL CHARACTERISTICS The l denotes the specifi cations which apply over the full operating temperature range, otherwise specifi cations are at TJ = 25°C. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Current Limit V IN = 45V , VOUT = 0 VIN = VOUT(NOMINAL) + 1V , ΔVOUT = – 5% l 22 75 mA mA Input Reverse-Leakage Current V IN = –45V , VOUT = 0 l 13 0 μ A Reverse-Output Current V OUT = 1.2V , VIN = 0 0.6 10 μA
0.6 0.4 0.2 0.8 1.2 1.4 1.6 1.8 TEMPERATURE (°C) MINIMUM INPUT VOLTAGE (V)
3008 G03
ILOAD = 20mA –50 –25 0 25 50 75 100 125 150 OUTPUT CURRENT (mA) DROPOUT VOL TAGE (mV) 150 200 250 10 12 14 20 450 100 2468 1 6 1 8 300 350 400
3008 G01
TJ = 125°C TJ = 25°C TEMPERATURE (°C) DROPOUT VOL TAGE (mV) 150 200 250 450 100 300 350 400
3008 G02
100μA –50 –25 0 25 50 75 100 125 150 Dropout Voltage Dropout Voltage Minimum Input Voltage TYPICAL PERFORMANCE CHARACTERISTICSTA = 25°C, unless otherwise noted. Output Voltage L T3008-1.8 TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3008 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 15 0 ILOAD = 100μA Output Voltage L T3008-3.3 TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3008 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 Output Voltage L T3008-2.5 TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3008 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 ADJ Pin Voltage TEMPERATURE (°C) ADJ PIN VOLTAGE (mV)
3008 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 IL = 100μA Output Voltage L T3008-1.2 Output Voltage L T3008-1.5 TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3008 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)
3008 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
TYPICAL PERFORMANCE CHARACTERISTICSTA = 25°C, unless otherwise noted. 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3008 G15
INPUT VOLTAGE (V) GND PIN CURRENT (μA) RL = 75Ω, IL = 20mA RL = 150Ω, 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
3008 G14
INPUT VOLTAGE (V) GND PIN CURRENT (μA) RL = 60Ω, IL = 20mA RL = 120Ω, IL = 10mA RL = 1.2k, IL = 1mA RL = 12k, IL = 100μA GND Pin Current L T3008-1.2 GND Pin Current L T3008-1.5 GND Pin Current L T3008-1.8 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3008 G16
INPUT VOLTAGE (V) GND PIN CURRENT (μA) RL = 90Ω, IL = 20mA RL = 180Ω, IL = 10mA RL = 1.8k, IL = 1mA RL = 18k, IL = 100μA GND Pin Current L T3008-2.5 GND Pin Current L T3008-3.3 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3008 G17
INPUT VOLTAGE (V) GND PIN CURRENT (μA) RL = 125Ω, IL = 20mA RL = 250Ω, 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
3008 G18
INPUT VOLTAGE (V) GND PIN CURRENT (μA) RL = 165Ω, IL = 20mA RL = 330Ω, IL = 10mA RL = 3.3k, IL = 1mA RL = 33k, IL = 100μA Quiescent Current INPUT VOLTAGE (V) QUIESCENT CURRENT (μA)
3008 G13
L T3008-1.2 L T3008-1.5 L T3008-1.8 L T3008-2.5 L T3008-3.3 L T3008-5 TEMPERATURE (°C) OUTPUT VOLTAGE (V)
3008 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 Output Voltage L T3008-5 ADJ Pin Bias Current Adjustable Quiescent Current TEMPERATURE (°C) ADJ PIN BIAS CURRENT (nA) –10 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) QUIESCENT CURRENT (μA) –50 –25 0 25 50 75 100 125 150
TYPICAL PERFORMANCE CHARACTERISTICSTA = 25°C, unless otherwise noted. SHDN Pin Input Current SHDN Pin Input Current 0.8 1.8 10 20 30 0.4 1.4 0.6 1.6 0.2 1.2 51 5 4 5 25 35 40
3008 G22
SHDN PIN VOLTAGE (V) SHDN PIN INPUT CURRENT (μA) –50 0.8 0 25 75 0.4 1.6 0.6 1.8 0.2 1.4 1.2 –25 100 15050 125
3008 G23
TEMPERATURE (°C) SHDN PIN INPUT CURRENT (μA) VSHDN = 45V Current Limit Reverse-Output Current 100
3008 G24
TEMPERATURE (°C) CURRENT LIMIT (mA) –50 0 75–25 25 15050 100 125 VIN = 2V VIN = 45V
3008 G25
TEMPERATURE (°C) REVERSE OUTPUT CURRENT (μA) –50 0 75–25 25 15050 100 125 OUT ADJ OUT = ADJ = 1.2V IN = SHDN = GND Input Ripple Rejection FREQUENCY (Hz)
3008 G26
10 100 1000 100000 10000 1000000 INPUT RIPPLE REJECTION (dB) VIN = 2.1V + 50mVRMS VOUT = 600mV ILOAD = 20mA 2.2μF 10μF Input Ripple Rejection INPUT RIPPLE REJECTION (dB)
3008 G27
TEMPERATURE (°C) –50 0 75–25 25 15050 100 125 VIN = VOUT (NOMINAL) + 2V + 0.5VP-P RIPPLE AT f = 120Hz ILOAD = 20mA GND Pin Current L T3008-5 200 450 500 2 4 6 100 350 150 400 300 250 1 3 8 105 7 9
3008 G19
INPUT VOLTAGE (V) GND PIN CURRENT (μA) RL = 250Ω, IL = 20mA RL = 500Ω, IL = 10mA RL = 5k, IL = 1mA RL = 50k, IL = 100μA GND Pin Current vs ILOAD 100 1000 LOAD (mA) GND CURRENT (μA)
3008 G20
0.001 0.01 0.1 1 10 100 VIN = 3.8V VOUT = 3.3V –50 0.6 1.4 1.5 07 5 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
3008 G21
TEMPERATURE (°C) SHDN PIN THRESHOLD (V) OFF TO ON ON TO OFF SHDN Pin Thresholds
TYPICAL PERFORMANCE CHARACTERISTICSTA = 25°C, unless otherwise noted. T ransient Response 500μs/DIV VOUT 50mV/DIV IOUT 20mA/DIV
3008 G31
IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 2.2μF T ransient Response 500μs/DIV VOUT 50mV/DIV IOUT 20mA/DIV
3008 G32
IOUT = 1mA TO 20mA VIN = 5.5V VOUT = 5V COUT = 10μF T ransient Response (Load Dump) 1ms/DIV VOUT 50mV/DIV 45V 12VVIN 10V/DIV
3008 G33
VOUT = 5V IOUT = 20mA COUT = 4.7μF Load Regulation Output Noise Spectral Density FREQUENCY (Hz) 0.1 OUTPUT NOISE SPECTRAL DENSITY (μV Hz) 100
3008 G29
3.3V 2.5V 1.8V 1.5V 0.6V COUT = 2.2μF ILOAD = 20mA 0.5 2.5 1.5 3.5 4.5 LOAD REGULATION (mV)
3008 G28
TEMPERATURE (°C) –50 0 75–25 25 15050 100 125 $IL = 1μA to 20mA VOUT = 600mV VIN = 2V RMS Output Noise vs Load Current ILOAD (mA) 0.001 350 450 400 500
3008 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
be referenced to a negative rail. GND for the best regulation. and the output voltage range is 600mV to 44.5V . solder Pin 7 to the PCB and tie directly to Pin 6.
3008 F01
Figure 1. Kelvin Sense Connection
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. The L T3008 has an output voltage range of 0.6V to 44.5V . Typical Performance Characteristics. Figure 2. Adjustable Operation Table 1. Output Voltage Resistor Divider Values
3008 F02
3008 F03
1210 CASE SIZE, 10μF
3008 F04
Figure 3. Ceramic Capacitor DC Bias Characteristics Figure 4. Ceramic Capacitor Temperature Characteristics output transients or ripple. load transient response is a function of output capacitance. larger load current changes. Give extra consideration to the use of ceramic capacitors. X5R is less expensive and is available in higher values.
Figure 5. Noise Resulting from Tapping the heat generated by power devices.
3008 F05
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. *Device is mounted on the topside.
- Output current multiplied by the input/output voltage
- GND pin current multiplied by the input voltage:
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: The maximum junction temperature equals the maximum junction temperature rise above ambient plus the maximum ambient temperature or: T Protection Features The L T3008 incorporates several protection features that make it ideal for use in battery-powered circuits. In ad- dition 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-to- input voltages. Current limit protection and thermal overload protec- tion protect the device against current overload condi- tions 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 fl ow 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. a 4-layer , 1 ounce copper PCB board with 3 thermal vias from the DFN exposed backside or the 3 fused TSOT-23 GND pins to inner layer GND planes achieves 45°C/W thermal resistance. Demo circuit DC 1388A’s board layout achieves this 45°C/W performance. This is approximately a 30% improvement over the lowest numbers shown in Tables 2 and 3. 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 for an application using the DC package? The power dissipated by the device is equal to: I OUT(MAX) (VIN(MAX) – VOUT) + IGND (VIN(MAX)) where, I OUT(MAX) = 20mA V IN(MAX) = 12.6V I GND at (IOUT = 20mA, VIN = 12.6V) = 0.3mA Table 3: Measured Thermal Resistance for TSOT-23 Package COPPER AREA BOARD AREA THERMAL RESISTANCE (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.
be referenced to a negative rail. L T3008 and stops OUT from sourcing current. diode when pulled above or below ground.
3008 F06
Figure 6. Reverse-Output Current reverse current if OUT is pulled above IN.
3.3V
3009 TA02
1μF 2.2μF SENSE GND L T3008-3.3 NO PROTECTION DIODES NEEDED! VIN 12V LOAD: SYSTEM MONITOR, VOLATILE MEMORY, ETC. IN SHDN
3008 TA03
1μFSUPERCAP 2.2μF SENSE PWR TO MONITORING CENTER SENSE GND GNDL T3008-5 LINE POWERVLINE 12V TO 15V DCHARGE RLIMIT LINE INTERRUPT DETECT Keep-Alive Power Supply Last-Gasp Circuit
6-Lead Plastic DFN (2mm × 2mm) (Reference L TC DWG # 05-08-1703) 2.00 p0.10 (4 SIDES) NOTE: 1. DRAWING TO BE MADE A JEDEC PACKAGE OUTLINE M0-229 VARIATION OF (WCCD-2) 2. DRAWING NOT TO SCALE 3. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH. MOLD FLASH, IF PRESENT, SHALL NOT EXCEED 0.15mm ON ANY SIDE 5. EXPOSED PAD SHALL BE SOLDER PLATED 6. SHADED AREA IS ONLY A REFERENCE FOR PIN 1 LOCATION ON THE TOP AND BOTTOM OF PACKAGE 0.38 p 0.05 BOTTOM VIEW—EXPOSED PAD 0.56 p 0.05 (2 SIDES) 0.75 p0.05 R = 0.115 TYP 1.37 p0.05 (2 SIDES) PIN 1 BAR TOP MARK (SEE NOTE 6)
0.200 REF
0.00 – 0.05 (DC6) DFN 1103 0.25 p 0.05 1.42 p0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 0.61 p0.05 (2 SIDES)1.15 p0.05 0.675 p0.05 2.50 p0.05 PACKAGE OUTLINE 0.25 p 0.05 0.50 BSC0.50 BSC PIN 1 CHAMFER OF EXPOSED PAD
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. 8-Lead Plastic TSOT-23 (Reference L TC DWG # 05-08-1639 Rev Ø) 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 0802
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
0.52 MAX 0.65 REF RECOMMENDED SOLDER PAD LAYOUT PER IPC CALCULATOR 1.4 MIN2.62 REF
1.22 REF
Linear Technology Corporation 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 ● FAX: (408) 434-0507 ● www.linear.com © LINEAR TECHNOLOGY CORPORATION 2007 LT 0509 REV A • PRINTED IN USA RELATED PARTS PART NUMBER DESCRIPTION COMMENTS L T1761 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 L T1762 150mA, Low Noise Micropower LDO V IN: 1.8V to 20V , VOUT = 1.22V , VDO = 0.3V , IQ = 25μA, ISD < 1μA, Low Noise: < 20μVRMS, L T1763 500mA, Low Noise Micropower LDO V IN: 1.8V to 20V , VOUT = 1.22V , VDO = 0.3V , IQ = 30μA, ISD < 1μA, Low Noise: < 20μVRMS, L T1764/L T1764A 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, L T1764A Version Stable with Ceramic Capacitors, DD and TO220-5 Packages L T1962 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 L T1963/L T1963A 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, L T1963A Version Stable with Ceramic Capacitors, DD, TO220-5, SOT223 and S8 Packages L T3009 20mA, 3μA I Q Micropower LDO VIN: 1.6V to 20V , Low IQ: 3μA, VDO = 0.28V , 2mm × 2mm DFN and SC70-8 Packages L T3020 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 L T3021 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 L T3080/ L T3080-1 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; L T3080-1 Version Has Integrated Internal Ballast Resistor L T3085 500mA, Parallelable, Low Noise, Low Dropout Linear Regulator 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 ThinSOT is a trademark of Linear Technology Corporation. IN SHDN 2.2μF 3.3V
3008 TA04a
1μF SENSE GND L T3008-3.3 VIN 12V LOW DUTY CYCLE PULSED LOAD 0mA TO 10mA Low Duty Cycle Applications Average Power Savings for Low Duty Cycle Applications 0mA to 10mA Pulsed Load, IN = 12V DUTY CYCLE (%) 0.1 100
3008 TA04b
POWER SAVINGS (%) 10μA IQ 100μA IQ 30μA IQ TYPICAL APPLICATION