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Analog Devices LT8333 | Demoboard EVAL-LT8333-BZ
LT8333 | Low IQ Boost/SEPIC Inverting Converter with 3A, 40V Switch
Details
| Topologie | Abwärts- und Aufwärtswandler |
| Eingangsspannung | 4.5-20 V |
| Schaltfrequenz | 300-2000 kHz |
| Ausgang 1 | 24 V / 2 A |
Beschreibung
Evaluation circuit EVAL-LT8333-BZ features the LT8333 in a Boost configuration. It operates with a switching frequency of 2MHz and is designed to convert a 4.5V to 20V source to 24V output. The converter can output up to 2A depending on the input voltage (see Figure 3 in the demo manual, Maximum Output Current vs VIN curve).This evaluation circuit features Spread-Spectrum Frequency Modulation (SSFM) and EMI filters to provide optimum EMI performance. This PCB layout is optimized for good EMI performance and small solution size. The evaluation board contains a selectable jumper, JP1, to aid in the selection of the desired SYNC pin mode of operation. At light load, either pulse-skipping (PULSE SKIP) or low-ripple Burst Mode® operation (BURST) can be selected to improve the efficiency.The LT8333 boost/SEPIC/inverting converter IC operates over an input range of 2.8V to 40V, suitable for automotive, telecom, and industrial applications. The converter provides adjustable and synchronizable operation from 300kHz to 2MHz with SSFM option. The LT8333 packs other popular features such as soft-start, bias pin, input undervoltage lockout. The IC can exhibit a low quiescent current down to 9μA in BURST mode and 1μA in shutdown, which makes it ideal for battery-operated systems. The LT8333 is assembled in a thermally enhanced 10-lead 3mm × 3mm DFN package.
Eigenschaften
- Wide Input Voltage Range: 2.8V to 40V
- Ultralow Quiescent Current and Low Ripple
- Burst Mode® Operation: IQ = 9μA
- 3A, 40V Power Switch
- Positive or Negative Output Voltage Programming with a Single Feedback Pin
- Programmable Frequency (300kHz to 2MHz)
- Synchronizable to an External Clock
- Spread Spectrum Frequency Modulation for Low EMI
- Bias Pin for Higher Efficiency
- Programmable Undervoltage Lockout (UVLO)
- Overcurrent and Overtemperature Protection
- Thermally Enhanced 10-Lead 3mm × 3mm DFN Package
Typische Anwendungen
- Portable Electronics
- Medical Diagnostic Equipment
- Industrial and Automotive
- Telecom
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | B(mm) | Beschichtung | t(mm) | Kernmaterial | Grundmaterial | C | VR(V (DC)) | Endurance(h) | IRIPPLE(mA) | Z(mΩ) | ILeak(µA) | DF(%) | Ø D(mm) | Verpackung | Z @ 100 MHz(Ω) | Zmax(Ω) | Testbedingung Zmax | IR 2(mA) | RDC max.(Ω) | Typ | Pins | Montageart | L(mm) | H(mm) | IR(mA) | Arbeitsspannung(V (AC)) | Betriebstemperatur | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | Abschirmung Gehäuse -Clip, 0.8 mm, Zinn | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieAbschirmung Gehäuse -Clip | Breite0.8 mm | BeschichtungZinn | Materialstärke0.15 mm | – | GrundmaterialStahl | – | – | – | – | – | – | – | – | – | – | – | – | – | – | TypClip | – | MontageartSMT | Länge6.5 mm | Höhe1.27 mm | – | – | Betriebstemperatur -40 °C up to +125 °C | |||
 | WE-CBF SMT-Ferrit, 1.2 mm, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-CBF SMT-Ferrit | Breite1.2 mm | – | – | – | – | – | – | – | – | – | – | – | – | – | Impedanz @ 100 MHz600 Ω | Maximale Impedanz700 Ω | Maximale Impedanz150 MHz | Nennstrom 22000 mA | Gleichstromwiderstand0.15 Ω | TypHochstrom | – | MontageartSMT | Länge2 mm | Höhe0.0009 mm | Nennstrom1500 mA | – | Betriebstemperatur -55 °C up to +125 °C | ||||
 | WCAP-ASLI Aluminium-Elektrolytkondensatoren, 6.6 mm, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-ASLI Aluminium-Elektrolytkondensatoren | Breite6.6 mm | – | Materialstärke0.3 mm | – | – | Kapazität68 µF | Nennspannung25 V (DC) | Endurance 2000 | Rippelstrom240 mA | Impedanz480 mΩ | Leckstrom17 µA | Verlustfaktor14 % | Durchmesser6.3 mm | Verpackung15" Tape & Reel | – | – | – | – | – | – | – | MontageartV-Chip SMT | Länge5.5 mm | – | – | – | Betriebstemperatur -55 °C up to +105 °C | ||||
 | WE-SHC Abschirmgehäuse, 31.6 mm, Zinn | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-SHC Abschirmgehäuse | Breite31.6 mm | BeschichtungZinn | Materialstärke0.2 mm | KernmaterialSteel | GrundmaterialZinnblech | – | – | – | – | – | – | – | – | – | – | – | – | – | – | TypOne Piece Cover | – | MontageartSMT | Länge31.6 mm | Höhe5.8 mm | – | – | Betriebstemperatur -40 °C up to +125 °C | |||
 | WR-PHD Kurzschlussbrücken, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-PHD Kurzschlussbrücken | – | – | – | – | – | – | – | – | – | – | – | – | – | VerpackungBeutel | – | – | – | – | – | – | Pins2 | – | – | – | Nennstrom3000 mA | Arbeitsspannung200 V (AC) | Betriebstemperatur -25 °C up to +105 °C |