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Analog Devices LTC3110 | Demoboard Design Note 558
Bidirectional DC/DC Regulator and Supercapacitor Charger
Details
| Topologie | Abwärts- und Aufwärtswandler |
| Eingangsspannung | 3.2-3.5 V |
| Schaltfrequenz | 300-1500 kHz |
| Ausgang 1 | 3.3 V |
Beschreibung
The LTC®3110 bidirectional buck-boost DC/DC regulatorcharges and balances a supercapacitor when a busvoltage is present (for example 3.3V) and dischargesthe supercapacitor into the load when the bus fails.The LTC3110 maintains the bus’s nominal level (3.3V inthe example in Figure 1) even if the supercapacitorvoltage is above or below the nominal bus voltage.Supporting the load this way allows data backup andretention during a power interruption—important in awide variety of industrial and automotive applications.
Eigenschaften
- VCAP Operating Range: 0.1V to 5.5V
- VSYS Operating Range: 1.71V to 5.25V
- Automatic Switchover from Charge to Backup Mode
- Programmable ±2% Accurate Charge Input Current Limit from 125mA to 2A
- ±1% Backup Voltage Accuracy
- Automatic Backup Capacitor Balancing
- Fixed 1.2MHz Switching Frequency
- Burst Mode® Operation: 40μA Quiescent Current
- Built-In Programmable Multipurpose Comparator with Open-Collector Outputn Open-Collector Outputs to Indicate Direction ofOperation and End of Charge
- Thermally Enhanced TSSOP-24 and 4mm × 4mm QFN-24 Packages
Typische Anwendungen
- Supercapacitor Backup Converter and Charger / Battery Backup Converter and Charger
- RF Systems with Battery/Capacitor Backup
- Servers, RAID Systems
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC max.(mΩ) | fres(MHz) | Montageart | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-LHMI SMT Speicherdrossel, 2.2 µH, 3.5 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | Induktivität2.2 µH | Performance Nennstrom3.5 A | Sättigungsstrom 13.2 A | Sättigungsstrom @ 30%6.2 A | Gleichstromwiderstand80 mΩ | Eigenresonanzfrequenz55 MHz | MontageartSMT | ||||
| WE-LHMI SMT Speicherdrossel, 2.2 µH, 4.75 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | Induktivität2.2 µH | Performance Nennstrom4.75 A | Sättigungsstrom 16.4 A | Sättigungsstrom @ 30%11.9 A | Gleichstromwiderstand50 mΩ | Eigenresonanzfrequenz46 MHz | MontageartSMT | ||||
| WE-LHMI SMT Speicherdrossel, 5.6 µH, 2.15 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | Induktivität5.6 µH | Performance Nennstrom2.15 A | Sättigungsstrom 11.95 A | Sättigungsstrom @ 30%3.65 A | Gleichstromwiderstand208 mΩ | Eigenresonanzfrequenz28 MHz | MontageartSMT | ||||
| WE-LHMI SMT Speicherdrossel, 5.6 µH, 2.85 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | Induktivität5.6 µH | Performance Nennstrom2.85 A | Sättigungsstrom 13.7 A | Sättigungsstrom @ 30%7 A | Gleichstromwiderstand122 mΩ | Eigenresonanzfrequenz21 MHz | MontageartSMT |