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PT1109 - 380KHz Step-Down Converter

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.

Features

  • z 1.5A Output Current z 0.5Ω 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 z Battery Charger z Pre-Regulator for Linear Regulators.

📥 Download Datasheet

Datasheet Details

Part number PT1109
Manufacturer PowTech
File Size 239.87 KB
Description 380KHz Step-Down Converter
Datasheet download datasheet PT1109 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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PT1109 1.5A,24V,380KHz Step-Down Converter 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. APPLICATION z PC Monitors z Distributed Power Systems FEATURES z 1.5A Output Current z 0.
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