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Details
| Topologie | Abwärtswandler |
| Eingangsspannung | 12 V |
| Ausgang 1 | 3.3 V / 3 A |
Beschreibung
The RT7272B is a high efficiency, current mode synchronous step-down DC/DC converter that can deliver up to 3Aoutput current over a wide input voltage range from 4.5V to 36V. The device integrates a 150mΩ high side and an 80mΩ low side MOSFET to achieve high conversion efficiency up to 95%. The current mode control architecture supports fast transient response and uses a simple compensation circuit.A cycle-by-cycle current limit function provides protection against a shorted output and an internal soft-start eliminates input surge current during start-up. The RT7272B provides complete protection functions such as inputunder voltage lockout, output under voltage protection, over current protection and thermal shutdown.The RT7272B is available in the thermal enhanced SOP-8 (Exposed Pad) package.
Eigenschaften
4.5V to 36V Input Voltage Range
-3A Output Current
- Internal N-MOSFETs
- Current Mode Control
- Fixed Frequency Operation : 500kHz
- Adjustable Output Voltage from 0.8V to 30V
- High Efficiency Up to 95%
- Stable with Low ESR Ceramic Output Capacitors
- Cycle-by-Cycle Current Limit
- Adjustable Current Limit
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, 4.7 µH, 9.4 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | Induktivität4.7 µH | Performance Nennstrom9.4 A | Sättigungsstrom 111.7 A | Sättigungsstrom @ 30%26 A | Gleichstromwiderstand15.5 mΩ | Eigenresonanzfrequenz16 MHz | MontageartSMT |