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Description

The SC1458 is a family of dual output, ultra-low dropout linear voltage regulators designed for use in battery powered wireless applications. Both versions of the SC1458 require an input voltage level between 2.5V and 5.5V. The SC1458A supplies 2.5V on OUTA and 1.8V on OUTB, while SC1458B supplies 2.85V on both outputs. (For other voltage options see the SC560).

Features

■ Input voltage range — 2.5 to 5.5V

■ Output voltages — 2.8V and 1.8V (SC1458A), 2.85V and 2.85V (SC1458B)

■ Maximum output current — 300mA (each LDO)

■ Low 200mV maximum dropout at 200mA load

■ Quiescent current — 100μA (both LDOs enabled)

■ Shutdown current — 100nA

■ Output noise < 50μVRMS (SC1458B)

■ PSRR > 65dB at 1kHz (SC1458B)

■ Space saving package — MLPD-W6, 3mm x 3mm

■ Over-temperature protection

■ Short-circuit protection

■ Under-voltage lockout

■ Reset monitor for output A (SC1458A)

Applications

■ PDAs and cellular phones

■ GPS devices

■ Palmtop computers and handheld instruments

■ TFT/LCD applications

■ Wireless handsets

■ Digital cordless phones and PCS phones

■ Personal communicators

■ Two-way pagers

■ Wireless LAN