STMicroelectronics ST730

The ST730 is 300 mA LDO regulator, designed to be used in several medium voltage applications. Ultra-low quiescent current of 5 μA makes it suitable for applications permanently connected to power supply/battery.

This feature is also useful when electronic modules remain permanently turned on.

The ST730 embeds protection functions, such as: current limit, short-circuit and thermal shutdown. The extended input voltage range, very low drop voltage and low quiescent current features make it suitable also for low power after-market automotive and consumer applications.

Key features​

• Wide input voltage range: 2.5 V to 28 V
• Ultra-low quiescent current: typ. 5 μA at no-load, 10 μA max., 1 μA max. in shutdown
• High output voltage accuracy: ± 0.5% @ 25 °C, ± 2.5% across temperature range
• Output current up to 300 mA

Additional features

• Fixed output voltage versions, starting from 1.2 V to 12 V with 100 mV step
• Adjustable voltage version, starting from 1.2 V to V_IN - V_DROP
• Stable with low ESR capacitors (0.47 µF min.)
• Thermal shutdown protection
• Current limit and SOA protection
• -40 °C to +125 °C operating temperature range

Applications

• Post regulation
• Electronic meters
• Smoke detectors / alarms
• Portable equipment
• Industrial application

Available tools

STEVAL-QUADV01:

Power management evaluation board based on the stepdown regulators L6981,L7983, ST1PS03, and the ST730 LDO

The STEVAL-QUADV01 evaluation board is based on the L6981 (capable of delivering up to 1.5 A DC), the L7983 (capable of delivering up to 300 mA DC), the ST1PS03 (capable of delivering up to 400 mA DC) synchronous monolithic step-down regulators, and the ST730 (capable of delivering up to 300 mA DC) LDO regulator.

Data brief

Video

STEVAL-QUADV01 evaluation board