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RT7249 - 18V Synchronous Step-Down Converter

Description

The RT7249 is a high efficiency, monolithic synchronous step-down DC/DC converter with a power switch.

The Buck converter can deliver up to 3A output current from 4.5V to 18V input supply.

Features

  • z Buck Regulator ` 4.5V to 18V Input Voltage Range ` 3A Output Current ` Internal N-Channel MOSFETs ` Current Mode Control ` Adjustable PWM Frequency ` Adjustable Output from 0.8V to 15V ` Adjustable Soft-Start Time ` Stable with Ceramic Output Capacitors ` Cycle-by-Cycle Current Limit ` Input Under-Voltage Lockout ` Output Under-Voltage Protection ` Thermal Shutdown z Power Switch ` ±15% Current-Limit Accuracy at 1.2A ` Adjustable Current Limit : 75mA to 2580mA ` Meet USB Current-Limiting Requi.

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Datasheet preview – RT7249

Datasheet Details

Part number RT7249
Manufacturer Richtek
File Size 268.78 KB
Description 18V Synchronous Step-Down Converter
Datasheet download datasheet RT7249 Datasheet
Additional preview pages of the RT7249 datasheet.

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Full PDF Text Transcription

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® RT7249 3A, 18V Synchronous Step-Down Converter with Adjustable Current Limited Power Switch General Description The RT7249 is a high efficiency, monolithic synchronous step-down DC/DC converter with a power switch. The Buck converter can deliver up to 3A output current from 4.5V to 18V input supply. The RT7249's current-mode architecture and external compensation allow the transient response to be optimized over a wide input range and loads. Cycleby-cycle current limit provides protections against shorted output and soft-start eliminates input current surge during start-up. The RT7249 also provides under-voltage protection and thermal shutdown. PWM frequency is adjustable by the ROSC pin and Power Switch current limit can also be adjusted by the RLIM pin.
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