Cissoid CXT-STA4919

The CXT-STA4919 high-temperature adjustable linear voltage regulator from Cissoid is part of their newly introduced CXT range of ICs designed specifically for automotive applications. This voltage regulator works with voltage input sources in the 4.5V-30V range and is able to generate any regulated voltage between 3V and 28V. CXT-STA4919 features self-protection by a built-in current limiter and thermal protection. It is adjustable from an external feedback resistor network and can be put in low-power disabled mode as and when needed. This voltage regulator saves space on the board and provides low thermal resistance due to its small footprint – it is delivered in a miniature 8-pin PSOIC8-EP package at only 3.99×4.98mm. Its operating temperature of up to 175°C is beyond the requirements of automotive standard AEC-Q100 Grade 0.

• High temperature automotive adjustable voltage regulator
• Input voltage from 4.5V to 30V with input transient (load dump) of up to 35V
• Output voltage of 3.0V to 28V
• Chip-enable input signal allowing to put the IC into low-power disable mode
• Output voltage accuracy of ±5% (excluding accuracy of exernal components but including accuracy, temperature, line and load regulation variations)
• Temperature range of -55°C to 175°C
• Typical quiescent current of 1.1mA
• Miniature 8-pin PSOIC8 package with exposed pad
• AEC-Q100 Grade 0 & PPAP capable (full qualification pending, please contact us for current status)

Typical Applications for the CXT-STA4919 from Cissoid include:

• Regulated power supplies for embedded electronics in automotive and industrial systems
• High-temperature automotive applications

The below table gives the full specifications of the Cissoid CXT-STA4919 voltage regulator:

Unless otherwise stated, T_j= 25°C,C_in= 4.7µF, C_out= 4.7µF. Bold figures point out values valid over the whole temperature range (T_j= -55°C to +175°C)

⁸ Please refer to Figure 11 on the datasheet (available in Technical Library) for evolution of minimum dropout in function of required output current

⁹ Load regulation measurements must be done in a way to avoid self-heating effect

¹⁰ Current through feedback resistances excluded

¹¹ Based on FR4 2s2p board + thermal vias under the exposed pad