ME2149
ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING
REGULATOR
General Description
The ME2149 series is a CMOS step-up switching
regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase compensation circuit, a PWM/PFM switching control circuit.
With an internal low-ON-resistance Nch Power MOS, this product is applicable to applications requiring high efficiency and high output current.
The ME2149 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under a light load and to prevent decline in the efficiency by IC operation current.
Features...