L4975A 5 A switching regulator

The L4975A is a stepdown monolithic power switching regulator delivering 5A at a voltage variable from 5.1 to 40V.

Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4975A include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a 15-lead multiwatt plastic power package and requires few external components. Efficient operation at switching frequencies up to 500KHz allows reduction in the size and cost of external filter component

技术特性
  • 5A OUTPUT CURRENT
  • 5.1V TO 40V OUTPUT VOLTAGE RANGE
  • 0 TO 90% DUTY CYCLE RANGE
  • INTERNAL FEED-FORWARD LINE REG.
  • INTERNAL CURRENT LIMITING
  • PRECISE 5.1V ± 2% ON CHIP REFERENCE
  • RESET AND POWER FAIL FUNCTIONS
  • SOFT START
  • INPUT/OUTPUT SYNC PIN
  • UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
  • PWM LATCH FOR SINGLE PULSE PER PERIOD
  • VERY HIGH EFFICIENCY
  • SWITCHING FREQUENCY UP TO 500KHz
  • THERMAL SHUTDOWN
  • CONTINUOUS MODE OPERATION
功能框图
L4975A 订购信息
订购型号 产品状态 美金价格 数量 封装 包装形式 温度范围 材料声明
L4975A Active   1000 MW 15L Tube    
DATASHEET
描述 版本 大小
L4975A : DS0069: 5A switching regulator 1 6725KB
DESIGN NOTES
描述 版本 大小
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration 1.0 360KB
SCHEMATIC PACKS
描述 版本 大小
Board Schematic 1.0 8KB