RT8078A

® RT8078A 4A, 1MHz, Synchronous Step-Down Converter General Description The RT8078A is a high efficiency synchronous, step-down DC/DC converter. It's input voltage range from 2.7V to 5.5V that provides an adjustable regulated output voltage from 0.6V to VIN while delivering up to 4A of output current. The internal synchronous low on-resistance power switches increase efficiency and eliminate the need for an external Schottky diode. The switching frequency is fixed internally at 1MHz. The 100% duty cycle provides low dropout operation, hence extending battery life in portable systems. Current mode operation with internal compensation allows the transient response to be optimized over a wide range of loads and output capacitors. The RT8078A is operated in PWM mode to achieve high efficiency for a wide load range. The RT8078A is available in WDFN-10L 3x3 and SOP-8 (Exposed Pad) packages. Ordering Information RT8078A Package Type QW : WDFN-10L 3x3 (W-Type) SP : SOP-8 (Exposed Pad-Option 2) Note : Lead Plating System G : Green (Halogen Free and Pb Free) Z : ECO (Ecological Element with Halogen Free and Pb free) 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. Features  High Efficiency : Up to 95%  Fixed Frequency : 1MHz  No Schottky Diode Required  Internal Compensation  0.6V Reference Allows Low Output Voltage  PWM Mode Operation  Low Dropout ...