RT8057 Datasheet | Richtek

Description The RT8057 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 2.7V to 5.5V. The RT8057 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, handheld devices, game console and related accessories. 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 RT8057 enters Low Dropout Mode when normal Pulse -Width Mode cannot provide regulated output voltage by continuously turning on the upper P-MOSFET. The RT8057 enters shut-down mode and consumes less than 1μA when the EN pin is pulled low. The switching ripple is easily smoothed-out by small package filtering elements due to a fixed operating frequency of 2.25MHz. The RT8057 is available in a small WDFN-6SL 2x2 package. Ordering Information (2) Taping Type ( Pin1 at Q2) Package Type QW : WDFN-6SL 2x2 (W-Type) Lead Plating System G : Green (Halogen Free and Pb Free) Note : Richtek products are :  Ro HS pliant and patible with the current requirements of IPC/JEDEC J-STD-020.  Suitable for use in Sn Pb or Pb-free soldering processes. Features - 2.7V to 5.5V Wide Input Operation Range - 2.25MHz Fixed-Frequency PWM Operation - Up to 1A Output Current - Up to 90% Efficiency - 0.6V Reference Allows Low Output Voltage - Internal Soft-Start - No Schottky Diode Required - Internal pensation to Reduce External ponents - Low Dropout Operation : 100% Duty Cycle - Ro HS pliant and Halogen Free Applications - Portable Instruments - Game Console and Accessories - Microprocessors and DSP Core Supplies - Cellular Phones - Wireless and DSL Modems - PC Cards Pin Configurations (TOP VIEW) LX 1 NC 2 FB 3 6 GND 5 VIN 7 4 EN WDFN-6SL 2x2 Marking Information J7 : Product Code J7W W : Date...