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RT8048 Datasheet(PDF) 1 Page - Richtek Technology Corporation |
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RT8048 Datasheet(HTML) 1 Page - Richtek Technology Corporation |
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1 / 11 page  RT8048 1 DS8048-01 June 2011 www.richtek.com Pin Configurations Ordering Information (TOP VIEW) WDFN-6L 2x2 3MHz 1A Step-Down Converter General Description The RT8048 is a high-efficiency Pulse-Width-Modulated (PWM) step-down DC/DC converter. Capable of delivering 1A output current over a wide input voltage range from 2.5V to 5.5V, the RT8048 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. Two operating modes are available including : PWM/Low Dropout auto switch and shut-down mode. The internal synchronous rectifier with low RDS(ON) dramatically reduces conduction loss at PWM mode. No external Schottky diode is required in practical application. The RT8048 enters Low- Dropout mode when normal PWM cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8048 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 3MHz. Features 2.5V to 5.5V Input Range 3MHz Fix-Frequency PWM Operation 1A Output Current 90% Efficiency No Schottky Diode Required 0.6V Reference Allows Low Output Voltage Low Dropout Operation : 100% Duty Cycle RoHS Compliant and Halogen Free Applications Portable Instruments Microprocessors and DSP Core supplies Cellular Phones Wireless and DSL Modems PC Cards Marking 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. HB : Product Code W : Date Code NC EN FB/VOUT GND LX VIN 5 4 1 2 3 6 7 RT8048( Package Type QW : WDFN-6L 2x2 (W-Type) Lead Plating System Z : ECO (Ecological Element with Halogen Free and Pb free) - ) Output Voltage Default : Adjustable 10 : 1.0V 12 : 1.2V 15 : 1.5V 18 : 1.8V 25 : 2.5V 33 : 3.3V HBW |
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