ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING
REGULATOR
Ver 03
ULTRA-SMALL PACKAGE PWM/PFM SWITCHING CONTROL STEP-UP SWITCHING
REGULATOR Featureÿ
l l l l l l l l 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 frequencyÿ300KHz External parts: coil, diode, capacitor, and
transistor Output voltage range: 1.
5V ~6.
5 V Output voltage accuracyÿ±2% Soft start function: 2 ms.
PACKAGEÿSOT-23-5
Descriptionÿ
The ME2129 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 ci...