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RT8253B Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8253B Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 15 page  RT8253B 1 DS8253B-02 March 2011 www.richtek.com 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 External Storage Device 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 (Expoaed Pad) 3A, 23V, 1.2MHz Synchronous Step-Down Converter General Description The RT8253B is a high-efficiency, monolithic synchronous step-down DC/DC converter that can deliver up to 3A output current from a 4.5V to 23V input supply. The RT8253B's current mode architecture and external compensation allow the transient response to be optimized over a wide range of loads and output capacitors. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. Fault conditions also include output under voltage protection and thermal shutdown protection. The low current (<3 μA) shutdown mode provides output disconnect, enabling easy power management in battery- powered systems. The RT8253B is available in a SOP-8 (Exposed Pad) package. Features ±±±±±1.5% High Accuracy Feedback Voltage 4.5V to 23V Input Voltage Range 3A Output Current Integrated N-MOSFET Switches Current Mode Control Fixed Frequency Operation : 1.2MHz Adjustable Output from 0.8V to 20V 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 Marking Information RT8253BGSP : Product Number x : H or L YMDNN : Date Code RT8253B xGSPYMDNN Package Type SP : SOP-8 (Exposed Pad-Option 1) RT8253B Lead Plating System G : Green (Halogen Free and Pb Free) H : UVP Hiccup L : UVP Latch-Off BOOT VIN SW GND SS EN FB COMP GND 2 3 4 5 6 7 8 9 |
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