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Overview
| Topology | Boost Converter |
| Input voltage | 4.5-36 V |
| Switching frequency | 100-2000 kHz |
| Output 1 | 12 V / 2 A |
Description
The LT®8357 is a wide input range, current mode, DC/DC controller which can be configured as a boost, SEPIC or flyback converter. The LT8357 drives a low side N-channel power MOSFET with 5V split gate drive. The current mode architecture allows adjustable and synchronizable 100kHz to 2MHz fixed frequency operation, or internal 19% triangle spread spectrum operation for low EMI. At light load,either pulse-skipping mode or low-ripple Burst Mode operation can be selected. Additional features include output power good and output short circuit protection in SEPIC and flyback configurations.With a wide 3V to 60V input voltage range and 8μA low uiescent current, the LT8357 provides a simple, compact and efficient solution for automotive, industrial, and battery-powered systems.
Features
- Wide Input Voltage Range: 3V to 60V
- Low IQ Burst Mode® Operation: 8μA
- Up to 95% Efficiency at 2MHz
- ±1.5% Internal 1V Voltage Reference
- 5V Split Gate Drive for Efficiency and EMI Optimization
- 100kHz to 2MHz Fixed Switching Frequency withExternal Clock Synchronization
- Spread Spectrum Frequency Modulation for Low EMI
- Accurate Enable Threshold with Hysteresis
- Programmable Output Soft-Start and Tracking
- Thermally-Enhanced 12-Lead MSOP Package
Typical applications
- Battery-Powered Systems
- Automotive and Industrial Systems
- Portable Electronic Equipment
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L1(µH) | L2(µH) | IR(A) | IR 2(A) | ISAT(A) | RDC1 typ(Ω) | RDC2 typ(Ω) | RDC1 max(Ω) | RDC2 max(Ω) | fres(MHz) | Type | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-DD SMT Shielded Coupled Inductor, 1.5 µH, 1.5 µH | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-DD SMT Shielded Coupled Inductor | Inductance 11.5 µH | Inductance 21.5 µH | Rated Current8.6 A | Rated Current 28.6 A | Saturation Current17.5 A | DC Resistance 10.012 Ω | DC Resistance 20.012 Ω | DC Resistance 10.016 Ω | DC Resistance 20.016 Ω | Self Resonant Frequency60 MHz | TypeCrossed |