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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 preview – RT7257A

Datasheet Details

Part number RT7257A
Manufacturer Richtek
File Size 233.81 KB
Description Synchronous Step-Down Converter
Datasheet download datasheet RT7257A Datasheet
Additional preview pages of the RT7257A datasheet.

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Full PDF Text Transcription

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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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