Schematic diagram of the scheme based on ME6203

The ME6203 series is an ultra-low static power low dropout linear regulator fabricated in CMOS technology.

Its working voltage is up to 40V. The circuit has built-in short circuit protection. This series of products can set a fixed output voltage through a built-in resistor feedback network, which can achieve 1.8V to 12V output. The output voltage accuracy is ±2% with a low temperature coefficient to ensure stable output voltage over the full temperature range.

Typical features:
Input voltage: 40V
Output voltage range: 1.8~12V
Output current: 100mA (VIN=5.5V, Vout=3.3V)
Low quiescent current: 3uA

Short circuit protection current: foldback short circuit current 20mA

Typical Application 

• Consumer and Industrial Equipment Point of Regulation
• Portable AV equipment
• Battery powered equipment
• Cameras, video recorders
• Reference voltage 

GENERAL DESCRIPTION ABOUT THE ME6203

The ME6203 series are highly accurate, low noise,LDO Voltage Regulators that are manufactured using CMOS technology and the input voltage of ME6203 series is in Excess of 30 V. 
This series contains three fixed output voltages of 3.0V, 3.3V and 5.0V that have no minimum load requirement to maintain regulation. 
On chip trimming adjusts the output voltage to within ±2.5% accuracy.

ME6203 consists of a output current limiting, a driver transistor, a precision reference voltage and an error amplifier. Output voltage is selectable in 100mV steps between 1.5V ~ 6.0V. The Devices are available in SOT-89(500mW).

THE ME6203 FEATURES
Output Current in Excess of 100mA
Operating Voltage Range:7V～30V
Highly Accuracy: ±2.5％
Small Standby Current: 13μA（TPY.）
Ripple Rejection: 40dB@1KHz（ME6203A33）
Line Regulation: 0.5％（TYP.）
Temperature Stability：0.5%（TYP.）
Operational Temperature Range: 0℃～100℃
Small Packages:SOT-89