MAX15029/MAX15030 Low-Dropout Linear Regulators

The MAX15029/MAX15030 low-dropout linear regulators operate from an input voltage as low as 1.425V and provide up to 500mA of continuous output current with a typical dropout voltage of only 40mV. The output voltage can be adjusted from 0.5V to VIN and maintains ±2% accuracy over the entire load and input voltage range and the -40°C to +125°C temperature range. The MAX15030 features a 3V to 5.5V BIAS input from a standby supply. When the device is in shutdown, the BIAS input current drops to less than 2µA.

The regulator uses small, 1µF ceramic input capacitors and 2.2µF ceramic output capacitors to deliver up to 500mA of output current. High bandwidth provides excellent transient response. The output voltage change caused by a 100mA to 500mA load current step is limited to less than 10mV using only a 2.2µF ceramic output capacitor, and the voltage change is even smaller with more output capacitance.

The device provides a logic-controlled shutdown input that reduces input current (IIN) consumption in standby mode to less than 5.5µA. Other features include soft-start to reduce inrush current, short-circuit protection, and thermal overload protection.

The MAX15030 features a BIAS input that allows a second supply to keep the LDO's internal circuitry running when the IN voltage goes to 0. Both devices operate over the -40°C to +125°C temperature range and are available in a thermally enhanced 10-pin TDFN package (3mm x 3mm) with an exposed pad for optimal power dissipation. For LDOs with 1A output current, refer to the MAX15027/MAX15028 data sheet.

Key Features

1.425V to 3.6V Input Voltage Range

Output voltage can be set from 0.5V to VIN

The maximum voltage difference is 150mV when the output current is 500mA

2% output accuracy over the entire load, input voltage, and operating temperature range

Use ceramic capacitors to ensure stable operation

Fast transient response

60µA Operating Bias Supply Current

1.2µA Shutdown Bias Supply Current

Short circuit protection and thermal overload protection

-40°C to +125°C operating temperature range

Soft-start limits inrush current

Thermally Enhanced 3mm x 3mm TDFN Package