Description

The SC1458ITS is a dual output, ultra-low dropout linear voltage regulator designed specifically for battery powered wireless applications. It has two versions: SC1458A and SC1458B. The input voltage range required for both versions is between 2.5V and 5.5V. The SC1458A supplies 2.5V on OUTA and 1.8V on OUTB, while the SC1458B supplies 2.85V on both outputs. This component is an ideal choice for applications that require efficient power management and compact size.

Specifications and features

The SC1458ITS offers the following specifications and features:

• Input voltage range: 2.5V to 5.5V
• Output voltages: 2.8V and 1.8V (SC1458A); 2.85V and 2.85V (SC1458B)
• Maximum output current: 300mA (each LDO)
• Low dropout voltage: 200mV maximum at 200mA load
• Quiescent current: 100μA (both LDOs enabled)
• Shutdown current: 100nA
• Output noise: < 50μVRMS (SC1458B)
• Power Supply Rejection Ratio (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)

Application Scenarios

The SC1458ITS has various applications, including:

• 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

Comparison

The SC1458ITS has the following advantages:

• Ultra-low dropout voltage for efficient power management
• Wide input voltage range for versatile applications
• Dual output options for flexibility
• Space-saving package for compact designs

However, it also has some disadvantages:

• Output noise for SC1458B may exceed 50μVRMS
• PSRR at 1kHz for SC1458B may be lower than 65dB