SC21150

POWER MANAGEMENT Features  Input voltage range — 2.3V to 5.5V  1.2A continuous output current  4MHz switching frequency  Adjustable Output Voltage 0.8V to VIN  1% output voltage accuracy  Adaptive On-Time architecture  Up to 100% duty cycle  Up to 96% peak efficiency  Power Save mode for efficient light load operation  >90% efficiency 30mA to 75mA  1μA shutdown current  23μA quiescent current  Pre-bias startup protection  Internal or optional external Soft Start  Device options (contact Semtech Marketing) Automatic output discharge Power Good indicator Internal Soft Start External Programmable Soft Start Forced PWM Operation Input  0.75mm x 1.11mm, 6-Bump WLCSP Package  WEEE and RoHS compliant and halogen-free SC21150 Tiny 1.2A Synchronous Buck Regulator Description The SC21150 is an ultra high efficiency 1.2A DC/DC buck regulator available in a tiny CSP package. These features make the SC21150 family perfect for small form factor portable applications where long battery life is essential. SC21150 is an Adaptive On-Time 4MHz switching regulator at full load conditions. Under light load conditions it seamlessly transitions into Power Save Mode and reduces switching frequency thus saving energy. High switching frequency operation allows the use of a very small 0.47μH inductor along with small input and output capacitors to minimize overall circuit size. A Forced PWM input allows continuous switching under all load conditions. The SC21150 is highly c...