LT3479 LINER [Linear Technology], LT3479 Datasheet
LT3479
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LT3479 Summary of contents
Page 1
... The low profi le (0.75mm) 14-pin, 4mm × 3mm DFN package provides excellent thermal performance in a small footprint. The LT3479 is also available in a thermally enhanced 16-pin TSSOP package. L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. ...
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... LT3479EFE#PBF LTC4263IDE#TRPBF LEAD BASED FINISH TAPE AND REEL LT3479EDE LT3479EDE#TR LT3479EFE LT3479EFE#TR Consult LTC Marketing for parts specifi ed with wider operating temperature ranges. For more information on lead free part marking, go to: For more information on tape and reel specifi cations, go to: ...
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... Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. Note 2: The LT3479 is guaranteed to meet performance specifi cations from 0°C to 70°C. Specifi cations over the –40°C to 85°C operating l The denotes the specifi ...
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... LT3479 TYPICAL PERFORMANCE CHARACTERISTICS Switch V CE(SAT) 0.5 0.4 125°C 0.3 25°C –50°C 0.2 0 0.5 1 1.5 2 2.5 SWITCH CURRENT (A) 3479 G01 SHDN Pin Turn-On Threshold 1.750 1.625 1.500 1.375 1.250 –50 – 100 TEMPERATURE (°C) 3479 G04 Soft-Start Pin Current –50 – ...
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... SS (Pin 12/Pin 13): Soft-Start. Place a soft-start capacitor here. Leave fl oating if not in use. GND (Pins 13, 14/Pins 8, 14, 15, 16): Ground. Tie directly to local ground plane. Exposed Pad (Pin 15/Pin 17): Power Ground. Must be connected to electrical PCB ground. LT3479 3479fb 5 ...
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... LT3479 BLOCK DIAGRAM C SS FEEDBACK AMPLIFIER FBP + FBN – V REF SHDN 1.25V REFERENCE OSCILLATOR INRUSH CURRENT PROTECTION COMPARATOR + V C – ICON + pwmout SLOPE – PWM COMPARATOR 8.5mW + 36mV – MASTER ...
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... Through an internal 8.5mΩ resistor placed in series with the inductor, the inrush current protec- tion comparator measures the inductor current exceeds 5A, a soft-start cycle is initiated. The LT3479 will remain in the soft-start condition until the fault has passed. LT3479 ...
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... Murata (714) 852-2001 Inductor Selection Several inductors that work well with the LT3479 are listed in Table 2. However, there are many other manufacturers and devices that can be used. Consult each manufacturer for more detailed information and their entire range of parts. Ferrite core inductors should be used to obtain the best effi ...
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... APPLICATIONS INFORMATION Diode Selection Schottky diodes, with their low forward voltage drop and fast switching speed, are ideal for LT3479 applications. Table 3 lists several Schottky diodes that work well with the LT3479. The diode’s average current rating must exceed the average output current. The diode’s maximum reverse voltage must exceed the output voltage ...
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... SHDN Figure 4. Suggested Board Layout Switching Frequency The switching frequency of the LT3479 is set by an exter- nal resistor attached to the R open. A resistor must always be connected for proper operation. See Table 4 and Figure 7 for resistor values and corresponding frequencies. Table 4. Switching Frequency ...
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... Inrush Current Protection The LT3479 features a novel inductor current sensing circuit that protects the LT3479 during hot plugging and short circuits. An internal resistor in series with the ex- ternal inductor senses the inductor current at all times. When it exceeds 5A, a soft-start cycle is initiated. Figure 9 3 ...
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... C2: AVX 1206 YD106MAT D1: DIODES INC B320A L1: TOKO FDV0630-4R7M 5V to 12V/800mA 500kHz Boost Converter L1 D1 10μ 2.2μ FBN SHDN LT3479 V REF SS FBP R GND 4.7k 10nF 39.2k 10nF 3479 TA04 C1: TAIYO YUDEN LMK316BJ225MD C2: AVX 1206 YD106MAT D1: DIODES INC. B320A L1: SUMIDA CDRH8D43-100 12 ...
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... C3: AVX 1206 YD106MAT D1, D2: DIODES INC B320A D3: CENTRAL SEMI, CMDSH-3-LTC L1: TOKO FDV0630-4R7M 0.9A C2 169k 10μF 30. OUT –5V 600mA D1 C3 402k 10μF 100k D3 100pF LT3479 Effi ciency 0.2 0.4 0.6 0.8 I (A) OUT 3479 TA03b Effi ciency ...
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... White LED Driver L1 D1 4.7μ 2.2μ SHDN FBN SS LT3479 V REF 124k FBP R V 10k GND T C 3479 TA07 10k 10nF 7.5k 2.2nF C1, C2: TAIYO YUDEN LMK316BJ225MD D1: PHILIPS PMEG 2010 D2, D3: LUMILEDS LXHL-PW01 L1: SUMIDA CDRH4D28-4R7 M1: VISHAY SILICONIX Si2302ADS C2 2.2μ ...
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... C1: TAIYO YUDEN EMK316BJ475ML C2: TAIYO YUDEN TMK325BJ475ML D1: DIODES INC B330B D2: LUMILEDS LXHL-NW99 L1: SUMIDA CDRH8D28-100 Effi ciency 100 V = 16V 12V 0.1 0.2 0.3 0.4 I (A) OUT 3479 TA08b LT3479 V OUT 16V TO 24V C2 4.7μF 1Ω 1Ω I LED 0.150Ω 500mA 3479 TA08 0.5 3479fb 15 ...
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... Triple Output Power Supply for TFTLCD Panels V IN 2. 0.1μF D1 3.3μH C1 4.7μ FBN C6 SHDN 0.1μF LT3479 V REF SS FBP 10nF R GND 10k 17.8k 2.2nF C1: AVX 0805ZD475MAT D1: MBRM120 OR EQUIVALENT C2: AVX 1210YD226MAT D2, D3: BAT54S OR EQUIVALENT C3 TO C6: X5R/X7R 10V L1: SUMIDA CDRH4D28-3R3 Effi ciency 100 ...
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... ALL CAPACITORS X5R/X7R DIELECTRIC 3479 TA11 OR EQUIVALENT Effi ciency 80 V =14V 10V IN OUT V =10V OUT 14V OUT 0.2 0.4 0.6 0.8 I (A) OUT 3479 TA11b LT3479 V OUT 7V TO 10V 1A 30μF 10.2k 16V V CTRL 0V-2.5V 26.1k 1.13k 10nF 11.3k V OUT –7V TO –10V 1A 30μF 16V 1.0 3479fb 17 ...
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... LT3479 PACKAGE DESCRIPTION 3.50 0.05 1.70 0.05 2.20 0.05 (2 SIDES) RECOMMENDED SOLDER PAD PITCH AND DIMENSIONS 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. ALL DIMENSIONS ARE IN MILLIMETERS 4. DIMENSIONS OF EXPOSED PAD ON BOTTOM OF PACKAGE DO NOT INCLUDE MOLD FLASH ...
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... REF 0 – 8 0.65 (.0256) BSC 4. RECOMMENDED MINIMUM PCB METAL SIZE FOR EXPOSED PAD ATTACHMENT MILLIMETERS (INCHES) *DIMENSIONS DO NOT INCLUDE MOLD FLASH. MOLD FLASH SHALL NOT EXCEED 0.150mm (.006") PER SIDE LT3479 4.90 – 5.10* (.193 – .201) 3.58 (.141) 16 1514 6.40 2.94 (.252) (.116) BSC ...
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... Linear Technology Corporation 20 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 ● 4.7μH C1 2.2μ FBN ON SHDN LT3479 V REF 115k SS FBP R GND 10k 10k 10nF 7.5k 2.2nF C1, C2: TAIYO YUDEN LMK316BJ225MD D1: PHILIPS PMEG2010 D2, D3: LUMILEDS LXHL-PW01 L1: SUMIDA CDRH4D28-4R7 ...