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Overview
| Topology | Buck Converter |
| Input voltage | 5-38 V |
| Switching frequency | 100-3000 kHz |
| Output 1 | 3.3 V / 20 A |
Description
The LTC®7803 is a high performance, 100% Duty Cycle Capable, synchronous step-down DC/DC switching regulator controller that drives an all N-channel power MOSFET stage. Synchronous rectification increases efficiency, reduces power losses and eases thermal requirements. A constant frequency current mode architecture allows a phase-lockable switching frequency of up to 3MHz. The LTC7803 operates from a wide 4.5V to 40V input supply range.
Features
- Low Operating IQ: 12μA (14V VIN to 3.3V VOUT)
- Wide Input Voltage Range: 4.5V to 40V
- Output Voltage Up to 40V
- Spread Spectrum Operation
- RSENSE or DCR Current Sensing
- PassThru™/100% Duty Cycle Capable
- Programmable Fixed Frequency (100kHz to 3MHz)
- Phase-Lockable Frequency (100kHz to 3MHz)
- Selectable Continuous, Pulse-Skipping, or Low Ripple Burst ModeR Operation at Light Loads
- Low Shutdown IQ: 1.2μA
- Thermally Enhanced 16-Pin 3mm × 3mm QFN and MSOP Packages
- AEC-Q100 Qualification in Progress
Typical applications
- Automotive and Transportation
- Telecommunications
- Industrial
- Military/Avionics
More information
Products
Order Code | Datasheet | Simulation | Downloads | Status | Product series | L(µH) | IR(A) | ISAT(A) | RDC max.(mΩ) | fres(MHz) | Mount | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-CHSA SMT High Current Inductor, 0.68 µH, 25.3 A | Status Activei| Production is active. Expected lifetime: >10 years. | Product seriesWE-CHSA SMT High Current Inductor | Inductance0.68 µH | Rated Current25.3 A | Saturation Current41.4 A | DC Resistance2.05 mΩ | Self Resonant Frequency88 MHz | MountSMT |