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Analog Devices LT8643SA | Demoboard EVAL-LT8643SA-AZ
LT8643SA| 42V, 6A Synchronous Step-Down Silent Switcher 2
Details
| Topologie | Abwärtswandler |
| Eingangsspannung | 5.8-42 V |
| Schaltfrequenz | 200-3000 kHz |
| Ausgang 1 | 5 V / 6 A |
Beschreibung
The demonstration circuit EVAL-LT8643SA-AZ is a 42V, 6A micropower synchronous step-down second generation Silent Switcher® with spread spectrum frequency modulation featuring the LT8643SA. The demo board is designed for 5V output from a 5.8V to 42V input. The wide input range allows a variety of input sources, such as automotive batteries and industrial supplies. The LT8643SA is a compact, ultra-low emission, high efficiency, and high speed synchronous monolithic step-down switching regulator. The integrated bypass capacitors optimize all the fast current loops and make it easier to minimize EMI/EMC emissions by reducing layout sensitivity. Selectable spread spectrum mode can further improve EMI/EMC performance. Ultra-low quiescent current in Burst Mode® operation achieves high efficiency at very light loads. Fast minimum on-time of 30ns enables high VIN to low VOUT conversion at high frequency.
Eigenschaften
- Silent Switcher ®2 Architecture○ Ultralow EMI Emissions on Any PCB○ Eliminates PCB Layout Sensitivity○ Internal Bypass Capacitors Reduce Radiated EMI○ Optional Spread Spectrum Modulation
- High Efficiency at High Frequency○ Up to 96% Efficiency at 1MHz, 12VIN to 5VOUT○ Up to 95% Efficiency at 2MHz, 12VIN to 5VOUT
- Wide Input Voltage Range: 3.4V to 42V
- Output Voltage Range: 0.97V to 10V(LT8640S/LT8643S); 0.97V to (VIN – 0.5V) (LT8640SA/LT8643SA)
- 6A Maximum Continuous, 7A Peak Output
- Ultralow Quiescent Current Burst Mode® Operation○ 2.5µA IQ Regulating 12VIN to 3.3VOUT (LT8640S/LT8640SA)○ Output Ripple < 10mVP-P
- External Compensation: Fast Transient Response and Current Sharing (LT8643S)
- Robust High VOUT Operation (LT8640SA/LT8643SA)○ Safely Tolerates High Reverse Current
- Fast Minimum Switch On-Time: 30ns
- Low Dropout Under All Conditions: 100mV at 1A
- Forced Continuous Mode
- Adjustable and Synchronizable: 200kHz to 3MHz
- Output Soft-Start and Tracking
- Small 24-Lead 4mm × 4mm LQFN Package
- AEC-Q100 Qualified for Automotive Applications
Typische Anwendungen
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | Z @ 100 MHz(Ω) | Zmax(Ω) | Testbedingung Zmax | IR(mA) | Z @ 1 GHz(Ω) | H(mm) | Typ | Pins | Montageart | L(mm) | Arbeitsspannung(V (AC)) | Betriebstemperatur | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-MPSB EMI Multilayer Power Suppression Bead, 100 Ω, 160 Ω | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-MPSB EMI Multilayer Power Suppression Bead | Impedanz @ 100 MHz100 Ω | Maximale Impedanz160 Ω | Maximale Impedanz1100 MHz | Nennstrom8000 mA | Impedanz @ 1 GHz150 Ω | Höhe2.3 mm | TypHochstrom | – | MontageartSMT | Länge4.5 mm | – | Betriebstemperatur -55 °C up to +125 °C | ||||
 | WR-PHD Kurzschlussbrücken, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-PHD Kurzschlussbrücken | – | – | – | Nennstrom3000 mA | – | – | – | Pins2 | – | – | Arbeitsspannung200 V (AC) | Betriebstemperatur -25 °C up to +105 °C | |||
 | WR-PHD Stiftleisten, –, – | Simulation– | Downloads7 Dateien | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-PHD Stiftleisten | – | – | – | Nennstrom2000 mA | – | – | TypGerade | Pins8 | MontageartTHT | Länge8 mm | Arbeitsspannung200 V (AC) | Betriebstemperatur -40 °C up to +105 °C |