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RT7237BHGSP
® RT7237B 2A, 18V, 1.2MHz Synchronous Step-Down Converter General Description Features ±1.5% High Accuracy Reference Voltage The RT7237B is a high efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 2A output current from a 4.5V to 18V input supply. The RT7237B'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 RT7237B 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 RT7237B is available in an SOP-8 (Exposed Pad) package. 4.5V to 18V Input Voltage Range 2A Output Current Integrated N-MOSFET Switches Current Mode Control Fixed Frequency Operation : 1.2MHz Output Adjustable from 0.8V to 12V Stable with Low ESR Ceramic Output Capacitors Up to 95% Efficiency Programmable Soft-Start Cycle-by-Cycle Over Current Limit Input Under Voltage Lockout Output Under Voltage Protection Thermal Shutdown Protection RoHS Compliant and Halogen Free Marking Information Applications RT7237BxGSP : Product Number RT7237Bx GSPYMDNN Wireless AP/Router Set-Top-Box Industrial and Commercial Low Power Systems LCD Monitors and TVs Green Electronics/Appliances Point of Load Regulation of High-Performance DSPs x : H or L YMDNN : Date Code Simplified Application Circuit BOOT VIN VIN CIN CBOOT L RT7237B SW Chip Enable VOUT R1 EN SS CSS CC GND Copyright © 2012 Richtek Technology Corporation. All rights reserved. DS7237B-01 September 2012 COUT FB COMP RC R2 is a registered trademark of Richtek Technology Corporation. www.richtek.com 1
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