IC521A

General Description

The MIC5210 is a dual linear voltage regulator with very low dropout voltage (typically 10mV at light loads and 140mV at 100mA), very low ground current (225µA at 10mA output), and better than 1% initial accuracy. It also features individual logic-compatible enable/shutdown control inputs.
Both regulator outputs can supply up to 150mA at the same time as long as each regulator’s maximum junction temperature is not exceeded.
Key features include an undervoltage monitor with an error flag output, a reference bypass pin to improve its already low-noise performance (8-pin versions only), reversed battery protection, current limiting, and overtemperature shutdown.
Designed especially for hand-held battery powered devices, the MIC5210 can be switched by a CMOS or TTL compatible logic signal, or the enable pin can be connected to the supply input for 3-terminal operation. When disabled, power consumption drops nearly to zero. Dropout ground current is minimized to prolong battery life.
Key features include current limiting, overtemperature shutdown, and protection against reversed battery.
The MIC5210 is available in 2.7V, 2.8V, 3.0V, 3.3V, 3.6V, 4.0V and 5.0V fixed voltage configurations. Other voltages are available; contact Micrel for details.

Features

• Micrel Mini 8™ MSOP package
• Up to 150mA per regulator output
• Low quiescent current
• Low dropout voltage
• Wide selection of output voltages
• Tight load and line regulation
• Low temperature coefficient
• Current and thermal limiting
• Reversed input polarity protection
• Zero off-mode current
• Logic-controlled electronic enable

Applications

• Cellular telephones
• Laptop, notebook, and palmtop computers
• Battery-powered equipment
• Bar code scanners
• SMPS post-regulator/dc-to-dc modules
• High-efficiency linear power supplies