LT3029 LINER [Linear Technology], LT3029 Datasheet
LT3029
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LT3029 Summary of contents
Page 1
... The device is available as an adjustable output voltage device with a 1.215V reference voltage. The LT3029 is offered in the thermally enhanced 16-lead MSOP and 16-lead, low profi le (4mm × 3mm × 0.75mm) DFN packages. ...
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... For more information on tape and reel specifi cations, go to: 2 (Note 1) Operating Junction Temperature (Notes 2, 12) LT3029E ............................................. –40°C to 125°C LT3029I .............................................. –40°C to 125°C LT3029H ............................................ –40°C to 150°C LT3029MP.......................................... –55°C to 125°C Storage Temperature Range ................... –65°C to 150°C Lead Temperature (Soldering, 10 sec) (MSOP Only) ..................................................... 300° ...
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... OUT IN Note 3: The LT3029 is tested and specifi ed for these conditions with the ADJ1/ADJ2 pin connected to the corresponding OUT1/OUT2 pin. Note 4: Maximum junction temperature limits operating conditions. The regulated output voltage specifi cation does not apply for all possible combinations of input voltage and output current. When operating at = 25° ...
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... TEMPERATURE (°C) 4 Note 10: SHDN1/ SHDN2 pin current fl ows into the pin. Note 11: The LT3029 minimum input voltage specifi cation limits dropout voltage under some output voltage/load conditions. See the curve of Minimum Input Voltage in the Typical Performance Characteristics. Note 12: The LT3029 includes overtemperature protection that is intended to protect the device during momentary overload conditions ...
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... G07 SHDN1 or SHDN2 Pin Threshold (On-to-Off) LOAD 1 1mA L 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –75 –50 –25 0 3029 G09 LT3029 T = 25°C, unless otherwise noted 25° 243k 1.215V OUT SHDN SHDN INPUT VOLTAGE (V) 3029 G06 = 1 ...
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... LT3029 TYPICAL PERFORMANCE CHARACTERISTICS SHDN1 or SHDN2 Pin Threshold (Off-to-On) 1.0 0.9 0.8 0 500mA L 0.6 0 1mA L 0.4 0.3 0.2 0 100 125 150 175 –75 –50 –25 0 TEMPERATURE (°C) SHDN1 or SHDN2 Pin Input Current 1 20V SHDN 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 –75 –50 – 100 125 150 175 TEMPERATURE (°C) Current Limit 2 ...
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... Channel-to-Channel Isolation 100 GIVEN CHANNEL IS TESTED WITH 50mV 3029 G21 SIGNAL ON OPPOSING CHANNEL, BOTH CHANNELS DELIVERING FULL CURRENT LT3029 T = 25°C, unless otherwise noted 25° 500mA = V +1V + 50mV RIPPLE IN OUT(NOMINAL) RMS = 0 BYP C = 10μF OUT C = 3.3μ ...
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... LT3029 TYPICAL PERFORMANCE CHARACTERISTICS Channel-to-Channel Isolation V OUT1 50mV/DIV V OUT2 50mV/DIV 50μs/DIV C = 10μF OUT1 C = 10μF OUT2 0.01μF BYP1 BYP2 Output Noise Spectral Density 25° 10μF OUT BYP I = 500mA OUT OUT 0.1 0.01 0.01 0.1 1 FREQUENCY (kHz) ...
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... Output Noise 100pF BYP V OUT 100μV/DIV 3029 G29 1ms/DIV C = 10μF OUT I = 500mA OUT 10Hz to 100kHz Output Noise 0.01μF BYP V OUT 100μV/DIV 3029 G31 1ms/DIV C = 10μF OUT I = 500mA OUT LT3029 3029 G30 3029 G32 3029f 9 ...
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... LT3029 TYPICAL PERFORMANCE CHARACTERISTICS Transient Response DEVIATION OUT 200mV/DIV LOAD CURRENT DEVIATION 250mA/DIV 200μs/DIV 100mA 10μ 25° 10μ OUT OUT Start-Up Time from Shutdown 0pF BYP V OUT 1V/DIV SHDN VOLTAGE 2V/DIV ...
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... LT3029 acts diode is in series with over a 10Hz its input. No reverse current fl ows into the LT3029 and no RMS reverse voltage appears at the load. The device protects itself and the load. ...
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... Adjustable Operation Each of the LT3029’s channels has an output voltage range of 1.215V to 19.5V. Figure 1 illustrates that output voltage is set by the ratio of two external resistors. The device regulates the output to maintain the corresponding ADJ pin voltage at 1.215V referenced to ground. R1’ ...
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... The ESR of the output capacitor affects stabil- ity, most notably with small capacitors. Linear Technology recommends a minimum output capacitor of 3.3μF with an ESR of 3Ω, or less, to prevent oscillations. The LT3029 is a micropower device, and output transient response is a function of output capacitance. Larger values of output capacitance decrease the peak deviations and provide ...
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... LT3029 APPLICATIONS INFORMATION 2μF for the applied DC bias voltage and over the operat- ing temperature range. X5R and X7R dielectrics result in more stable characteristics and are more suitable for use as the output capacitor. The X7R type has better stability across temperature, while the X5R is less expensive and is available in higher values. Exercise care even when using X5R and X7R capacitors ...
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... Power dissipation for each channel equals the sum of the two components listed above. Total power dissipation for the LT3029 equals the sum of the power dissipated by each channel. The LT3029’s internal thermal shutdown circuitry protects both channels of the device if either channel experiences an overload or fault condition ...
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... Current limit protection and thermal overload protection protect the device against current overload conditions at each output of the LT3029. For normal operation, do not allow the junction temperature to exceed 125°C (LT3029E/ LT3029I/LT3029MP) or 150°C (LT3029H). The typical ther- mal shutdown temperature threshold is 165°C and the circuitry incorporates approximately 5° ...
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... Current fl ow back into the output follows the curve shown in Figure 5. If either of the LT3029’s IN pins is forced below its cor- responding OUT pin, or the OUT pin is pulled above its corresponding IN pin, input current for that channel typi- cally drops to less than 2μ ...
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... LT3029 PACKAGE DESCRIPTION 3.60 ±0.05 2.20 ±0.05 1.70 ± 0.05 RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS APPLY SOLDER MASK TO AREAS THAT ARE NOT SOLDERED PIN 1 TOP MARK (SEE NOTE 6) 0.200 REF NOTE: 1. DRAWING PROPOSED TO BE MADE VARIATION OF VERSION (WGED-3) IN JEDEC PACKAGE OUTLINE MO-229 2. DRAWING NOT TO SCALE 3 ...
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... MAX SEATING PLANE 0.17 – 0.27 (.007 – .011) 0.50 TYP (.0197) BSC LT3029 8 0.35 REF 1.651 0.102 0.12 REF (.065 .004) DETAIL “B” CORNER TAIL IS PART OF THE LEADFRAME FEATURE. DETAIL “B” FOR REFERENCE ONLY 9 NO MEASUREMENT PURPOSE ...
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... Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● Coincident Tracking Supply Application V OUT1 1.8V IN1 3.3μF 10nF 113k 500mA 3.3μF 1% BYP1 ADJ1 237k LT3029 1% SHDN1 IN2 OUT2 V 3.3μF 54.9k 3.3μF 1.5V 10nF 1% 500mA BYP2 SHDN2 ADJ2 237k GND 1% 3029 TA02 ...