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RT7257A - Synchronous Step-Down Converter

Description

The RT7257A is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 18V input supply.

Features

  • z ±1.5% High Accuracy Reference Voltage z 4.5V to 18V Input Voltage Range z 3A Output Current z Integrated N-MOSFET Switches z Current Mode Control z Fixed Frequency Operation : 340kHz z Output Adjustable from 0.8V to 15V z Up to 95% Efficiency z Programmable Soft-Start z Stable with Low ESR Ceramic Output Capacitors z Cycle-by-Cycle Over Current Protection z Input Under Voltage Lockout z Output Under Voltage Protection z Thermal Shutdown Protection z RoHS Compliant and Halogen Free.

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Datasheet Details

Part number RT7257A
Manufacturer Richtek
File Size 233.81 KB
Description Synchronous Step-Down Converter
Datasheet download datasheet RT7257A Datasheet

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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® RT7257A 3A, 18V, 340kHz Synchronous Step-Down Converter General Description The RT7257A is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 18V input supply. The RT7257A's current mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycle-bycycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7257A also provides under voltage protection and thermal shutdown protection. The low current (<3μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7257A is available in an SOP-8 (Exposed Pad) package.
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