L5981 Up to 1 A step down switching regulator

The L5981 is step-down switching regulator with 1.5 A (min.) current limited embedded power MOSFET, so it is able to deliver in excess of 1 A DC current to the load depending on the application condition.

The input voltage can range from 2.9 V to 18 V, while the output voltage can be set starting from 0.6 V to VIN. Having a minimum input voltage of 2.9 V, the device is suitable also for 3.3 V bus.

Requiring a minimum set of external components, the device includes an internal 250 kHz switching frequency oscillator that can be externally adjusted up to 1 MHz.

The VFQFPN8 package with exposed pad allows reducing the RthJA down to approximately 60 °C/W

技术特性
  • 1 A DC output current
  • 2.9 V to 18 V input voltage
  • Output voltage adjustable from 0.6 V
  • 250 kHz switching frequency, programmable up to 1 MHz
  • Internal soft-start and inhibit
  • Low dropout operation: 100 % duty cycle
  • Voltage feed-forward
  • Zero load current operation
  • Overcurrent and thermal protection
  • VFQFPN8 3 mm x 3 mm package
功能框图
L5981 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
L5981TR Active   1000 VDFPN 8 3x3x1.0 Tape And Reel    
L5981 Active   1000 VDFPN 8 3x3x1.0 Tube    
DATASHEET
描述 版本 大小
L5981 : 1 A step-down switching regulator 6 715KB
DESIGN NOTES
描述 版本 大小
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration 1.0 360KB
BOARDS AND TOOLS
型号 描述
EVAL5981 L5981, 1 A step-down switching regulator, evaluation board
MARKETING BROCHURES
描述 版本 大小
BRFFX0210 :FFX: Full flexible amplification 1.0.0 864KB