LT8648SJV#WPBF

LT8648S is a high-current synchronous step-down DC-DC regulator adopting Silent Switcher 2 ultra-low EMI architecture. JV stands for industrial/automotive extended temperature grade specification. WPBF denotes lead-free tray packaging for prototype verification, engineering testing and small-batch assembly. The device is housed in 36-lead 7mm×4mm exposed-pad LQFN surface-mount package.

This monolithic high-power buck converter is designed for harsh automotive and industrial environments, featuring a wide input voltage range of 3 V to 42 V, capable of sustaining automotive load dump voltage spikes. It delivers up to 15 A continuous output current per single channel, and multiple devices can be paralleled to achieve higher output power with precise automatic current sharing via external compensation circuit design.

Built on proprietary Silent Switcher 2 technology together with integrated internal bypass capacitors and optional spread-spectrum modulation, the IC drastically reduces radiated and conducted electromagnetic interference, eliminating strict PCB layout restrictions and easily complying with CISPR 25 automotive EMI standards. Peak conversion efficiency reaches 95.5% at 1 MHz switching frequency (12 V input to 5 V output), maintaining outstanding efficiency even under high switching frequencies up to 2.2 MHz, which enables compact designs using small inductors and multilayer ceramic capacitorsstatic6.ar….

Key electrical characteristics: adjustable switching frequency ranging from 200 kHz to 2.2 MHz with external clock synchronization support; minimum switch on-time of 25 ns for wide output voltage flexibility; ultra-low dropout voltage (35 mV @ 1 A load); output ripple kept below 10 mV peak-to-peak. Burst Mode operation cuts quiescent current down to 100 μA under no-load regulation conditions, ideal for battery-powered systems to extend runtimestatic6.ar….

Embedded functional modules include programmable soft-start to suppress power-on inrush current, power-good status monitoring pin, and reverse current tolerance capability. Comprehensive protection mechanisms consist of cycle-by-cycle peak current limiting, short-circuit foldback protection, hysteretic thermal shutdown, and undervoltage lockout to safeguard the chip against overload, short-circuit and overheating faults. External compensation delivers ultra-fast load transient response for high-speed digital core power railsstatic6.ar….

Encapsulated in 36-pin thermally enhanced LQFN plastic package with central exposed thermal pad, overall dimensions 7 mm × 4 mm. The exposed pad provides superior thermal conduction to dissipate heat efficiently during full-load continuous operation and limit internal junction temperature rise. Moisture Sensitivity Level is MSL3; all reflow soldering procedures must be completed within 168 hours once the original vacuum packaging is unsealed. Tray packaging is adopted to facilitate manual circuit debugging, performance evaluation and small-volume pre-production assembly.

The junction operating temperature range spans -40 °C to +150 °C, qualified to AEC-Q100 automotive grade for reliable long-term operation inside automotive ADAS systems, vehicle body control units, industrial automation cabinets, communication servers and portable high-power test equipment under severe temperature fluctuations and intensive electromagnetic interference surroundings. Manufactured with lead-free materials, the component complies with global RoHS environmental directives. The highly integrated single-chip architecture eliminates numerous external EMI filtering components, simplifies high-current power supply PCB layout and shortens hardware development cyclestatic6.ar….

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