ME2139
ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING
REGULATOR
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 compensation circuit, a PWM/PFM switching control circuit.
With an external low-ON-resistance Nch Power MOS, this product is applicable to applications
Feature
Low voltage operation: Start-up is guaranteed from 0.
9 V(IOUT =1 mA ) 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: ...