CS5203A-3GT3

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Overview

The CS5203A-3GT3 is a fixed-output linear regulator from the CS5203A series, manufactured by onsemi. It provides a regulated output voltage of 3.3 V with a maximum load current of 3.0 A. The device features an accuracy of ±2.0% for fixed voltage versions and operates within an input voltage range supporting adjustable outputs from 1.25 V to 13 V in other variants. It exhibits a typical dropout voltage as low as 1.0 V depending on the output current level. The maximum quiescent current is specified at 10 mA under full load conditions. The component is housed in a surface-mount 2 PAK-3 package.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Feature Summary

• Provides stable 3.0 A output current capability for power-sensitive applications
• Features fast loop response and low dropout voltage for improved transient performance
• Includes comprehensive protection circuitry against overload, Safe Operating Area (SOA) violations, overcurrent, and thermal shutdown

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Applications

• Post-regulator stages in power supply architectures
• Microprocessor power supply units
• Low voltage operation systems requiring good transient response

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Procurement Notes

Verify that the specific suffix GT3 corresponds to the TO-220 or surface mount 2 PAK-3 package variant as documented in official datasheets. Confirm the fixed 3.3 V output specification matches the application requirements. Ensure compatibility with existing pinout configurations if replacing legacy components like the LT1085 family, noting the lower dropout characteristics of the CS5203A series.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Selection Notes

Select this component when a fixed 3.3 V output at up to 3.0 A is required with high accuracy. Consider the CS5203A series for designs needing superior transient response due to its fast loop response. Evaluate the thermal performance given the 1.0 V dropout characteristic at full load. Compare against the LT1085 family if pin compatibility is critical but lower dropout voltage is desired.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Part Context

The CS5203A-3GT3 belongs to the CS5203A series of linear regulators offered by onsemi. This series includes adjustable and fixed voltage options (1.5 V, 3.3 V, 5.0 V). The regulators are designed to be pin-compatible with the LT1085 family while offering enhanced performance through lower dropout voltages. The series is intended for applications requiring reliable post-regulation and microprocessor power delivery.

Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Replacement Considerations

The CS5203A series is explicitly noted as pin compatible with the LT1085 family of linear regulators. When substituting, verify that the lower dropout voltage of the CS5203A does not conflict with existing headroom requirements. Ensure thermal management strategies account for the specific package type and power dissipation characteristics.