Its internal 4.7A switch can supply a continuous output current of up to 3A and voltages as low as 1.2V. The LT3995's Burst Mode® operation offers extremely low leakage current, making it well-suited for applications such as automotive or industrial systems that require continuous operation and optimal battery life.
The LT3995's unique design ensures a minimal voltage drop of only 500mV, even when the input voltage falls below the programmed output voltage, making it ideal for applications such as automotive cold starts. The switching frequency is user-programmable between 200kHz and 2MHz, and synchronizable between 250kHz and 2MHz, allowing the designer to optimize efficiency and avoid frequency bands critical for noise sensitivity. The combination of its 16-pin MSOP package with thermal enhancements and high switching frequency allows for small external inductors and capacitors, resulting in a compact and thermally efficient solution.
The LT3995 utilizes a high-efficiency 4.7A, 85mΩ switch and integrates the boost diode, oscillator, control circuitry, and logic onto a single die. Burst mode operation with its low ripple maintains high efficiency with low output currents and keeps output ripple below 15mVp-p. Special design techniques and a new high-voltage process enable efficiencies of up to 90% across a wide input voltage range, while the LT3995's current-mode topology ensures fast transient response and excellent loop stability. Additional features include power supply indication, soft-start capability, and thermal protection.
The LT3995EMSE is supplied in a thermally enhanced MSOP-16 package, with a starting price of $3.55 per unit for orders of 1,000 units. The LT3995IMSE has been tested and is guaranteed to operate at a junction temperature between -40°C and 125°C, and is priced at $3.91 per unit for orders of 1,000 units. The LT3995HMSE has been tested and is guaranteed to operate at a junction temperature between -40°C and 150°C.
Main features: LT3995
• Extremely low leakage current: 2.7 μA IQ for 12VIN to 3.3VOUT
• Burst Mode® operation with low ripple; output ripple < 15 mVP-P
• Wide input range: 4.3 V to 60 V
• Maximum output current of 3 A
• Excellent starting and dropout performance
• Adjustable switching frequency: 200 kHz to 2 MHz
• Synchronizable between 250 kHz and 2 MHz
• Precise and programmable undervoltage lockout
• Low turn-off current: IQ = 700 nA
• Power supply signal indication
• Soft-start capability
• Thermal shutdown protection
• Backflow current limiting with SS override
• Saturation switch design: 85 mΩ on-resistance
• Small, thermally enhanced 16-pin MSOP package
