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RT7270 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT7270 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 14 page  RT7270 ® DS7270-01 September 2012 www.richtek.com 1 Copyright 2012 Richtek Technology Corporation. All rights reserved. is a registered trademark of Richtek Technology Corporation. © Ordering Information Note : Richtek products are : RoHS compliant and compatible with the current require- ments of IPC/JEDEC J-STD-020. Suitable for use in SnPb or Pb-free soldering processes. Pin Configurations (TOP VIEW) Applications 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 SOP-8 (Exposed Pad) 3A, 18V, 340kHz Synchronous Step-Down Converter General Description The RT7270 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 RT7270's current mode architecture and external compensation allow the transient response to be optimized over a wide input voltage range and loads. Cycle-by-cycle current limit provides protection against shorted outputs, and soft-start eliminates input current surge during start-up. The RT7270 also provides under voltage protection and thermal shutdown protection. The low current (<3 μA) shutdown mode provides output disconnection, enabling easy power management in battery-powered systems. The RT7270 is available in an SOP-8 (Exposed Pad) package. Features ±±±±±1.5% High Accuracy Reference Voltage 4.5V to 18V Input Voltage Range 3A Output Current Integrated N-MOSFET Switches Current Mode Control Fixed Frequency Operation : 340kHz Output Adjustable from 0.925V to 15V Up to 95% Efficiency Programmable Soft-Start Stable with Low ESR Ceramic Output Capacitors Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout Output Under Voltage Protection Thermal Shutdown Protection RoHS Compliant and Halogen Free BOOT VIN SW GND SS EN FB COMP GND 2 3 4 5 6 7 8 9 Marking Information RT7270xZSP : Product Number x : H or N YMDNN : Date Code Package Type SP : SOP-8 (Exposed Pad-Option 2) RT7270 Lead Plating System Z : ECO (Ecological Element with Halogen Free and Pb free) H : UVP Hiccup N : UVP Disabled RT7270x ZSPYMDNN |
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