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Analog Devices LT8636 | Demoboard AD-GMSLCAMRPI-ADP
42V, 5A/7A Peak Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current
Details
| Topologie | Sonstige Topologie |
| Eingangsspannung | 3.4-42 V |
| Schaltfrequenz | 300-3000 kHz |
| Ausgang 1 | 5 V / 5 A |
Beschreibung
The LT®8636/LT8637 synchronous step-down regulator features Silent Switcher architecture designed to minimize EMI emissions while delivering high efficiency at high switching frequencies. Peak current mode control with a 30ns minimum on-time allows high step-down ratios even at high switching frequencies.The LT8636’s ultralow 2.5µA quiescent current—with the output in full regulation—enables applications requiring highest efficiency at very small load currents. The LT8637has external compensation to enable current sharing and fast transient response at high switching frequencies. A CLKOUT pin enables synchronizing other regulators to the LT8636/LT8637.
Eigenschaften
- Silent Switcher ® Architecture
- Ultralow EMI Emissions
- 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
- 5A Maximum Continuous, 7A Peak Transient Output
- Ultralow Quiescent Current Burst Mode® Operation
- 2.5µA IQ Regulating 12VIN to 3.3VOUT (LT8636)
- Output Ripple < 10mVP-P
- External Compensation: Fast Transient Response and Current Sharing (LT8637)
- 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 Power Good
- Small 20-Lead 4mm × 3mm LQFN Package
- AEC-Q100 Qualified for Automotive Applications
Typische Anwendungen
- General Purpose Step-Down
- Automotive and Industrial Supplies
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | L(µH) | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | RDC(mΩ) | fres(MHz) | Material | Pins | Raster(mm) | Typ | L(mm) | H(mm) | IR(A) | Arbeitsspannung(V (AC)) | Verpackung | Kontaktwiderstand(mΩ) | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-HCI SMT-Hochstrominduktivität, 0.76 µH, 22.9 A | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-HCI SMT-Hochstrominduktivität | Induktivität0.76 µH | Performance Nennstrom22.9 A | Sättigungsstrom 18 A | Sättigungsstrom @ 30%15 A | Gleichstromwiderstand2.25 mΩ | Eigenresonanzfrequenz200 MHz | MaterialSuperflux | Pins2 | – | – | Länge7 mm | Höhe4.8 mm | – | – | – | – | ||||
 | WR-FPC Zero Insertion Force Connectors - 0.50mm, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWR-FPC Zero Insertion Force Connectors - 0.50mm | – | – | – | – | – | – | – | Pins22 | Raster0.5 mm | TypHorizontal | Länge15.1 mm | – | Nennstrom0.5 A | Arbeitsspannung50 V (AC) | VerpackungTape and Reel | Kontaktwiderstand50 mΩ |