General Description

The MAX1982/MAX1983 are low-voltage, low-dropout linear regulators with an external bias supply input. The 5V bias supply drives the gate of the internal N-channel pass transistor, making these devices ideal for applications that require low-voltage outputs from low-voltage inputs. The MAX1982 delivers 1.2V (±3) at 300mA from an input voltage of 1.25V to 5.5V. The MAX1983 delivers an adjustable output voltage from 0.8V to 2V.

Features

♦ Low-Cost 1.2V, 300mA VID Supply

♦ ±3 Output Voltage Accuracy

♦ No Minimum Load Current Required

♦ 1.25V to 5.5V Input Supply Voltage

♦ 5V Input Bias Supply Voltage

♦ Power-Good (PGOOD) Open-Drain Output with 1ms Rising Edge Propagation Delay (MAX1982)

♦ Adjustable Output Voltage (MAX1983)

♦ Low Supply Current (IBIAS + IIN = 165µA typ)

♦ 5µA (max) Shutdown Supply Current

♦ Tiny 6-Pin SOT23 Package

Applications

Notebook Computers

VID Power Supplies

PDAs

Cell Phones

Low-Dropout Regulators with External Bias Supply