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Details
| Topologie | Aufwärtswandler |
| Eingangsspannung | 4.5-10 V |
| Schaltfrequenz | 300-3000 kHz |
| Ausgang 1 | 12 V / 1.5 A |
Beschreibung
The LT8337/LT8337-1 is a low IQ, synchronous step-up DC/DC converter. It features Silent Switcher architecture and optional spread spectrum frequency modulation (SSFM) to minimize EMI emissions while delivering high efficiencies at high switching frequencies.The wide input/output voltage range, low VIN pin quiescent current in Burst Mode operation, and 100% duty-cycle capability for the synchronous MOSFET in PassThru operation (VIN > VOUT) makes the LT8337/LT8337-1 ideally suited for battery-powered systems and general purpose step-up applications.The LT8337/LT8337-1 integrates 28V, 5A power switches, operating at a fixed switching frequency programmable between 300kHz and 3MHz and synchronizable to an external clock. The LT8337/LT8337-1 features output soft-start and output overvoltage lockout.The LT8337-1 allows external compensation via the VC pin for fast transient response. The LT8337 offers an output power good flag via the PG pin.
Eigenschaften
- Silent Switcher® Architecture
- Ultralow EMI Emissions
- Optional Spread Spectrum Frequency Modulation
- Integrated 28V, 5A Power Switches
- Wide Input Voltage Range: 2.7V to 28V
- Output Voltage Programmable Up to 26V
- Low VIN Pin Quiescent Current
- 0.3μA in Shutdown
- 4μA in Burst Mode® Operation (LT8337)
- 15μA in PassThru™ (LT8337)
- 100% Duty Cycle Capability for Synchronous MOSFET
- External Compensation: Fast Transient Response (LT8337-1)
- Power Good Monitor (LT8337)
- Adjustable and Synchronizable: 300kHz to 3MHz
- Pulse-Skipping or Burst Mode Operation at Light Load
- Small 16-Lead (3mm × 3mm) LQFN Package
Typische Anwendungen
- Battery-Powered Systems, General Purpose Step-Up
Weiterführende Informationen
Artikeldaten
| Artikel Nr. | Datenblatt | Simulation | Downloads | Produktserie | L (µH) | IR (A) | ISAT1 (A) | ISAT2 (A) | fres (MHz) | Version | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | V (V) | Montageart | Z @ 100 MHz (Ω) | Zmax (Ω) | Testbedingung Zmax | IR 2 (mA) | RDC max. (mΩ) | Typ | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 74479290125 | SPEC | 8 Dateien | WE-PMCI Power Molded Chip Induktivität | 0.25 | 9.35 | 8.5 | 15.65 | 150 | Standard | 9.35 | – | – | – | SMT | – | – | – | 4000 | 31 | – | ||
 | 74438357015 | SPEC | 9 Dateien | WE-MAPI SMT-Speicherdrossel | 1.5 | 6.2 | – | – | 48 | SMT | 8.2 | 11 | 17.1 | 80 | SMT | – | – | – | – | 20 | – | ||
 | 742792040 | SPEC | 9 Dateien | WE-CBF SMT-Ferrit | – | 1.5 | – | – | – | SMT | – | – | – | – | SMT | 600 | 700 | 150 MHz | 2000 | 150 | High Current |
| Artikel Nr. | Datenblatt | Simulation | |
|---|---|---|---|
| 74479290125 | SPEC | |
| 74438357015 | SPEC | |
| 742792040 | SPEC |
| Muster |
|---|
| Artikel Nr. | Datenblatt | Simulation | Downloads | Produktserie | L (µH) | IR (A) | ISAT1 (A) | ISAT2 (A) | fres (MHz) | Version | IRP,40K (A) | ISAT,30% (A) | RDC typ. (mΩ) | V (V) | Montageart | Z @ 100 MHz (Ω) | Zmax (Ω) | Testbedingung Zmax | IR 2 (mA) | RDC max. (mΩ) | Typ | Muster |
|---|