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Texas Instruments LM5145
LM5145 6-V to 75-V Synchronous Buck DC-DC Controller With Wide Duty Cycle Range
Details
| Topologie | Abwärtswandler |
| Eingangsspannung | 6-75 V |
| Schaltfrequenz | 100-1000 kHz |
| Ausgang 1 | 60 V / 30 A |
| IC-Revision | A |
Beschreibung
The LM5145 75-V synchronous buck controller is designed to regulate from a high input voltage source or from an input rail subject to high voltage transients, minimizing the need for external surge suppression components. A high-side switch minimum on-time of 40 ns facilitates large step-down ratios, enabling the direct step-down conversion from 48 V to low-voltage rails for reduced system complexity and solution cost. The LM5145 continues to operate at nearly 100% duty cycle during input voltage dips as low as 6 V, making it well suited for high-performance industrial control, robotic, datacom and RF power amplifier applications.
Eigenschaften
Versatile Synchronous Buck DC-DC Controller– Wide Input Voltage Range of 6 V to 75 V– Adjustable Output Voltage From 0.8 V to 60 V
- Meets EN55022 / CISPR 22 EMI Standards
- Lossless RDS(on) or Shunt Current Sensing
- Switching Frequency From 100 kHz to 1 MHz– SYNC In and SYNC Out Capability
- 40-ns Minimum On-Time for High VIN / VOUT Ratio
- 140-ns Minimum Off-Time for Low Dropout
- 0.8-V Reference With ±1% Feedback Accuracy
- 7.5-V Gate Drivers for Standard VTH MOSFETs– 14-ns Adaptive Dead-Time Control– 2.3-A Source and 3.5-A Sink Capability– Low-Side Soft-Start for Prebiased Start-Up
- Adjustable Soft-Start or Optional Voltage Tracking
- Fast Line and Load Transient Response– Voltage-Mode Control With Line Feedforward– High Gain-Bandwidth Error Amplifier
- Precision Enable Input and Open-Drain PowerGood Indicator for Sequencing and Control
- Inherent Protection Features for Robust Design– Hiccup Mode Overcurrent Protection– Input UVLO With Hysteresis– VCC and Gate Drive UVLO Protection– Thermal Shutdown Protection With Hysteresis
- VQFN-20 Package With Wettable Flanks
- Create a Custom Design Using the LM5145 With
Typische Anwendungen
- Industrial Motor Drives
- Remote Radio Unit (RRU) and BTS,Networking and Computing Power
- Non-Isolated PoE and IP Cameras
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | Tol. C | VR(V (DC)) | Bauform | Betriebstemperatur | DF(%) | RISO | Keramiktyp | L(mm) | B(mm) | H(mm) | Fl(mm) | Verpackung | L(µH) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | RDC max.(mΩ) | fres(MHz) | Montageart | ISAT,10%(A) | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 16 V(DC), 47 µF, ±20% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 16 V(DC) | Kapazität47 µF | Kapazität±20% | Nennspannung16 V (DC) | Bauform1210 | Betriebstemperatur -55 °C up to +85 °C | Verlustfaktor10 % | Isolationswiderstand0.002 GΩ | KeramiktypX5R Klasse II | Länge3.2 mm | Breite2.5 mm | Höhe2.5 mm | Pad Dimension0.75 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | – | |||||
| WCAP-CSGP MLCCs 6.3 V(DC), 100 µF, ±20% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 6.3 V(DC) | Kapazität100 µF | Kapazität±20% | Nennspannung6.3 V (DC) | Bauform1206 | Betriebstemperatur -55 °C up to +85 °C | Verlustfaktor10 % | Isolationswiderstand0.001 GΩ | KeramiktypX5R Klasse II | Länge3.2 mm | Breite1.6 mm | Höhe1.6 mm | Pad Dimension0.5 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | – | |||||
 | WE-XHMI SMT Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-XHMI SMT Speicherdrossel | – | – | – | Bauform6030 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | Länge6.65 mm | Breite6.45 mm | Höhe3 mm | – | – | Induktivität1 µH | Performance Nennstrom15.75 A | Sättigungsstrom @ 30%24.95 A | Gleichstromwiderstand5.5 mΩ | Gleichstromwiderstand6.05 mΩ | Eigenresonanzfrequenz59 MHz | MontageartSMT | Sättigungsstrom 111 A | ||||
 | WE-LHMI SMT Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | – | – | – | Bauform1365 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | Länge13.65 mm | Breite12.5 mm | Höhe6.2 mm | – | – | Induktivität3.3 µH | Performance Nennstrom16.2 A | Sättigungsstrom @ 30%41.5 A | Gleichstromwiderstand5.7 mΩ | Gleichstromwiderstand6.8 mΩ | Eigenresonanzfrequenz20.3 MHz | MontageartSMT | Sättigungsstrom 120.3 A | ||||
| WE-LHMI SMT Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | – | – | – | Bauform1365 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | Länge13.65 mm | Breite12.5 mm | Höhe6.2 mm | – | – | Induktivität4.7 µH | Performance Nennstrom15.1 A | Sättigungsstrom @ 30%35.8 A | Gleichstromwiderstand6.5 mΩ | Gleichstromwiderstand8.4 mΩ | Eigenresonanzfrequenz13.9 MHz | MontageartSMT | Sättigungsstrom 118.4 A | ||||
| WE-LHMI SMT Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-LHMI SMT Speicherdrossel | – | – | – | Bauform1365 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | Länge13.65 mm | Breite12.5 mm | Höhe6.2 mm | – | – | Induktivität15 µH | Performance Nennstrom7.7 A | Sättigungsstrom @ 30%18.5 A | Gleichstromwiderstand24.4 mΩ | Gleichstromwiderstand28 mΩ | Eigenresonanzfrequenz7.5 MHz | MontageartSMT | Sättigungsstrom 110.2 A |