- Published on 2015-08-26 17:09
- Written by Super User
(Linear Technology Corporation) introduced the the 60VIN buck switching regulator LT3988, the device can provide two-way 1A output. LT3988 in the VIN range of 4V to 60V, with overvoltage lockout protection, so as not to be up to 80V transient voltage damage, making it ideal for automotive applications load dump and cold crank conditions. The LT3988 can be used two separate input track or with a single input-driven to maximize design flexibility. Its internal 1.3A switch up to 1A of continuous output current. The switching frequency is user programmable, the range of 250kHz to 2.5MHz, so designers can maximize efficiency while avoiding critical noise-sensitive frequency bands. Its thermally enhanced MSOP-16E package and high switching frequency (to allow the use of small external inductors and capacitors) are combined to form a compact footprint and high thermal efficiency solutions.
LT3988 1.3A switch, using two high-efficiency and integrated in a single chip with the necessary boost diode, oscillator, control and logic circuitry. The clamping diode current sense (DA) pin even at high switching frequency can be in the input voltage transient protection circuit for the period, while increasing the ability to protect against short circuit. The inverting switch to minimize the input and output ripple. Special design techniques used in the LT3988 can achieve high efficiency in 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 250kHz to 2.5MHz), the internal loop compensation, thermal shutdown and tracking capabilities.
The LT3988EMSE the price of $ 3.65 per tablet. Industrial temperature grade versions LT3988IMSE tested and guaranteed to work in -40 ° C to 125 ° C operating junction temperature range, the price of $ 4.2 per tablet. The high temperature version LT3988HMSE also been tested, and guaranteed to work in -40 ° C to 150 ° C junction temperature range, a price of $ 4.45 per tablet. All prices are one thousand approved purchase price of each version are available from stock. For more information, Please login www.linear.com.cn/product/LT3988.
Summary of Features: LT3988
Wide Input Range: 4V to 60V overvoltage lockout protection circuit can safely withstand 80V transients
Two with the internal power switch 1A output switching regulator
Short circuit withstand capability
· 0.25MHz to 2.5MHz adjustable switching frequency can be synchronized over the entire frequency range
· An integrated boost diode
The integrated loop compensation
· Phase switching to reduce the ripple
Low Shutdown IQ (<2μA)
The use of small inductors and ceramic capacitors
· A thermally enhanced 16-pin MSOP package
