FAN25800: 500 mA, Low-IQ, Low-Noise, LDO Regulator

The FAN25800 is a linear low-dropout regulator with a high PSRR (85 dB at 100 Hz) and low output noise (typically 8 µVRMS over a 10 Hz to 100 kHz bandwidth). The LDO can provide up to 250 mA of output current for 2.8 V output and up to 500 mA of output current for 3.3 V output.

The enable control pin can be used to shut down the device and disconnect the output load from the input. During shutdown, the supply current drops below 1 µA.

The FAN25800 is designed to be stable with space-saving ceramic capacitors as small as 0201 case size. The FAN25800 is available in a 4-bump, 0.35 mm pitch, WLCSP package.

Features

• V_IN: 2.3 V to 5.5 V
• V_OUT = 3.3 V (I_OUT Max. = 500 mA)
• V_OUT = 2.8 V (I_OUT Max. = 250 mA)
• Output Noise Density at 250 mA and 10 kHz = 19 nV/√Hz (Integrated 8 µVrms)
• Low IQ of 17 µA in Regulation and Low-IQ Dropout Mode with Optimized Dropout Transitions
• <70 mV Dropout Voltage at 250 mA Load
• Controlled Soft-Start to Reduce Inrush Current
• Thermal Shutdown Protection (TSD)
• Input Under-Voltage Lockout (UVLO)
• Short-Circuit Protection (SCP)
• Stable with Two 1.5 µF, 0201 Ceramic Capacitors at VOUT
• 4-Ball WLCSP, 0.65 mm x 0.65 mm, 0.35 mm Pitch, Plated Solder, 330 µm Maximum Thickness