ME2139F
Description
The ME2139 series is a CMOS step-up switching regulator which mainly consists of a reference voltage source, an oscillation circuit, an error amplifier, a phase pensation circuit, a PWM/PFM switching control circuit. With an external low-ON-resistance Nch Power MOS, this product is applicable to applications
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- Feature
- Low voltage operation: Start-up is guaranteed from 0.9 V(IOUT =1 m A ) Duty ratio: Built-in PWM/PFM switching control circuit 15 to 78 % . oscillator frequency：1.0MHz External transistor Output voltage range: 1.5V ~6.5 V Output voltage accuracy：±2% Soft start function: 2 m S. PACKAGE：SOT23-5 parts: coil, diode, capacitor, and requiring high efficiency and high output current. The ME2139 series switches its operation to the PFM control circuit whose duty ratio is 15 % with to the PWM/PFM switching control circuit under
VÛmw`R- yÑb€ a light load and to prevent decline in the efficiency by IC operation current.
Selection Guide w.goftech.
Typical...
