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RT8056 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8056 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 11 page  RT8056 1 DS8056-02 April 2011 www.richtek.com Pin Configurations (TOP VIEW) WDFN-10L 3x3 Applications Portable Instruments Microprocessors and DSP Core Supplies Cellular Phones Wireless and DSL Modems PC Cards Set Top Box Dual 1A 1.5MHz Synchronous Step-Down Converters General Description The RT8056 is a high efficiency synchronous dual step- down converter. Capable of delivering two independent 1A output current over a wide input voltage range from 2.8V to 5.5V. The RT8056 is ideally suited for portable electronic devices that are powered from 1-cell Li-ion battery or from other power sources such as cellular phones, PDAs and hand-held devices. The RT8056 provides two operation modes including PWM/Low- Dropout auto switch and shutdown modes. The internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical applications. The RT8056 enters Low-Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8056 enters shut-down mode and consumes less than 0.1 μA when EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 1.5MHz. Features 2.8V to 5.5V Input Voltage Range 1.5MHz Fixed Frequency PWM Operation 2 x 1A Output Current Up to 95% Efficiency No Schottky Diode Required 0.6V Reference Allows for Low Output Voltage Low Dropout Operation : 100% Duty Cycle Small 10-Lead WDFN Package RoHS Compliant and Halogen Free FB2 NC FB1 NC LX2 EN2 GND LX1 EN1 VIN 9 8 7 1 2 3 4 5 10 6 11 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. Marking Information JM=YM DNN JM= : Product Code YMDNN : Date Code RT8056 Package Type QW : WDFN-10L 3x3 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) |
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