描述 Description

The SP7662 is a synchronous voltage mode PWM step-down (buck) regulator capable of a constant output current up to 12A. A wide 5V to 22V single input voltage range allows for single supply operations from industry standard 5V, 12V and 18V power rails. Operations down to 3V are supported with an additional biasing voltage.
With a 300kHz constant operating frequency and integrated high and low side switch, the SP7662 reduces the overall component count and solution footprint. In addition to a 1% output set point accuracy, this device provides high efficiency, low ripple and excellent line and load regulation. An enable function and soft-start feature allow for controlled power up sequencing implementation.
Built-in current limiting, UVLO, output short-circuit and over temperature protection ensure safe operation under abnormal operating conditions.
The SP7662 is offered in a RoHS compliant, lead free 26-pin 7mm x 4mm DFN package.

特性 Features

·4.5V to 5.5V or 4.75V to 22V input voltage range using single supply
· 3V to 22V input voltage range using dual supply
· ±1% 0.8V reference
· 12A output capability
· Current limiting using inductor DCR
· Built in low RDS(ON) power switches
· 300 kHz fixed frequency operation
· Over temperature protection
· Short-circuit protection with auto restart
· Wide BW Amp allows type II or III compensation
· Programmable soft-start
· Fast transient response
· High efficiency: greater than 95% possible
· Non-synchronous start up into a pre-charged output
· Available in RoHS compliant, lead free packaging: small 7mm x 4mm DFN package
· U.S. patent #6,922,041

應用 Application

Design ToolsSimulation Models·SPICEModels
·SIMPLISModels