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Overview
| Topology | Boost Converter |
| Input voltage | 4.5-10 V |
| Switching frequency | 300-3000 kHz |
| Output 1 | 12 V / 1.5 A |
Description
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.
Features
- 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
Typical applications
- Battery-Powered Systems, General Purpose Step-Up
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT1(A) | ISAT2(A) | fres(MHz) | IRP,40K(A) | ISAT,30%(A) | RDC typ.(mΩ) | VOP(V) | Mount | Z @ 100 MHz(Ω) | Zmax(Ω) | Test Condition Zmax | IR 2(mA) | RDC max.(mΩ) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-PMCI Power Molded Chip Inductor, 0.25 µH, 9.05 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-PMCI Power Molded Chip Inductor | Inductance0.25 µH | Rated Current9.05 A | Saturation Current 18.5 A | Saturation Current 215.65 A | Self Resonant Frequency150 MHz | Performance Rated Current9.05 A | Saturation Current @ 30%15.65 A | DC Resistance26 mΩ | – | MountSMT | – | – | – | Rated Current 24000 mA | DC Resistance31 mΩ | – | ||||
 | WE-MAPI SMT Power Inductor, 1.5 µH, 6.2 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-MAPI SMT Power Inductor | Inductance1.5 µH | Rated Current6.2 A | – | – | Self Resonant Frequency48 MHz | Performance Rated Current8.2 A | Saturation Current @ 30%11 A | DC Resistance17.1 mΩ | Operating Voltage80 V | MountSMT | – | – | – | – | DC Resistance20 mΩ | – | ||||
 | WE-CBF SMT EMI Suppression Ferrite Bead, –, 1.5 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CBF SMT EMI Suppression Ferrite Bead | – | Rated Current1.5 A | – | – | – | – | – | – | – | MountSMT | Impedance @ 100 MHz600 Ω | Maximum Impedance700 Ω | Maximum Impedance150 MHz | Rated Current 22000 mA | DC Resistance150 mΩ | TypeHigh Current |