Dual 60-V IN , 1-A monolithic 2.5-MHz step-down DC/DC converter withstands 80-V transients
The device is ideal for load dump and cold-crank conditions commonly found in automotive applications.
The LT3988 can be driven by two separate input rails or by a single input, maximizing design flexibility. Its internal 1.3 A switches deliver up to 1A of continuous output current. Switching frequency is user-programmable from 250 kHz to 2.5 MHz, enabling the designer to maximize efficiency, while avoiding critical noise-sensitive frequency bands. The combination of its thermally enhanced MSOP-16E package and high switching frequency, which keeps the external inductor and capacitors small, provides a compact, thermally efficient footprint.
The LT3988 utilizes dual, high efficiency 1.3 A switches, with the necessary boost diodes, oscillator, control and logic circuitry integrated into a single chip. Its catch diode current sense (DA) pins protect the circuit during input voltage transients even at high switching frequencies while adding robust short-circuit protection. Anti-phase switching minimizes both input and output ripple. Special design techniques used in the LT3988 enable high efficiency over a wide input voltage range, and the device’s current mode topology enables fast transient response and excellent loop stability. Other features include external synchronization (from 250 kHz to 2.5 MHz), internal loop compensation, thermal shutdown and tracking capability.
Availability and Pricing
Pricing for the LT3988EMSE starts at $3.65 each. An industrial temperature grade version, the LT3988IMSE, is tested and guaranteed to operate from -40 to 125°C operating junction temperature and is priced at $4.20 each. A high temperature version, the LT3988HMSE, is tested and guaranteed to operate from -40 to 150°C operating junction temperature and is priced at $4.45 each. All prices are for 1,000-piece quantities and all versions are available from stock.
More information about the LT3988 at www.linear.com/product/LT3988
- DC/DC step-down converter delivers 1V to 5V to space applications
- Multiple-output automotive regulator IC with buck/boost capability
- HV protection diodes are automotive-rated, in small outline
- Automotive battery stack monitor achieves 0.04% measurement accuracy
- Automotive PMIC runs ECUs in difficult power conditions
- 500 mA, 140V Boost/SEPIC/Flyback/Inverting DC/DC: IQ = 6µA
- Digi-Key’s pushes IDT’s wireless power reference kits through hackster
- Harsh-environment high input voltage, high output current linear regulator
- 38V dual PMBus DC/DC controller with current mode control
- Lowest-drift bandgap voltage reference reaches 1.5ppm/°C, offers low dropout
- Is ethylene carbonate the key to extending battery life?
- R&D centre investigates flow cell applications
- A new measure for wireless power transfer to support highly efficient links
- Can candle soot help power Electric Vehicles?
- Heat helps rechargeable batteries extend lifetimes
- Internet blackouts by 2020, warns nanoelectronics book
- Huawei reveals rapid charge batteries: 50% capacity charged in minutes
- Want longer lasting lithium ion batteries? Just add hydrogen
- Will solar cells power a Li-FI revolution?
- 48V system achieves near full-hybrid characteristics
- Tandem thin film solar cells add perovskite to boost efficiency
- Perovskite advance targets long-wavelength sunlight to boost solar cell efficiency
- Universal wireless charger meets multiple standards
- IDT to acquire ZMDI for $310million
- PoWiFi optimizes energy harvesting to power IoT sensors
- A4WP and PMA combine for create AirFuel Alliance
- Sub-threshold logic MCU maker claims low-power benchmark lead
- Harvest more energy from photons to improve solar cells and li-fi
- Multi-crystalline silicon solar cell claims 21.25 percent efficiency record
- Licensing deal drives lithium-sulfur battery technology to production
- Battery Size Matters
- Isolation in AC Motor Drives: Understanding the IEC 61800-5-1 Safety Standard
- Multichemistry Buck Battery Charger Controller
- Why Making the Move from a Variable Transformer to a VariPLUS is the Right Decision
- Determine Balancing Current for the LTC3305 Lead-Acid Battery Balancer
- Testing PSRR with High-Frequency Ripple
- A SEPIC Fed Buck Converter