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| 品牌 | 华润矽威 | 型号 | PT1109 |
| 批号 | 10+ | 封装 | SOP8 |
| 营销方式 | 现货 | 产品性质 | 热销 |
| 处理信号 | 模拟信号 | 制作工艺 | 半导体集成 |
| 导电类型 | 单极型 | 集成程度 | 小规模 |
| 规格尺寸 | SOP8（mm） | 工作温度 | -40~125（℃） |
| 静态功耗 | 0（mW） | 类型 | 驱动IC |
输入电压 4.75~24V
输出电压 1.13~18V
输出电流1.5A
效率95%
GENERAL DESCRIPTION
The PT1109 is a monolithic step-down switch mode
regulator with a built in internal power MOSFET. It
achieves 1.5A continuous output current over a wide
input supply range with excellent load and line
regulation. Current mode operation provides fast
transient response and eases loop stabilization. Fault
condition protection includes cycle-by-cycle current
limiting and thermal shutdown. In shutdown mode the
regulator draws 23μA of supply current.
The PT1109 requires a minimum number of readily
available standard external components.
FEATURES
z 1.5A Output Current
z 0.5? Internal Power MOSFET Switch
z Stable with Low ESR Output Ceramic Capacitors
z Up to 95% Efficiency
z 23µA Shutdown Mode
z Fixed 380KHz Frequency
z Thermal Shutdown
z Cycle-by-Cycle Over Current Protection
z Wide 4.75V to 24V Operating Input Range
z Output Adjustable from 1.13V to 18V
z Programmable Under Voltage Lockout
z Available in 8-Pin SOP8 Packages
APPLICATION
z PC Monitors
z Distributed Power Systems
z Battery Charger
z Pre-Regulator for Linear Regulators
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