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Product Detailed Parameters
- Description：DIODE CUR REG 50V 900UA 350MW
- Series：SST500
- Mfr：Linear Integrated Systems, Inc.
- Package：Tape & Reel (TR),Cut Tape (CT)
- Voltage - Anode - Cathode (Vak)(Max)：50V
- Regulator Current (Max)：900µA
- Voltage - Limiting (Max)：1.9V
- Power - Max：350mW
- Applications：-
- Operating Temperature：-55°C ~ 150°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-236-3, SC-59, SOT-23-3
- Supplier Device Package：SOT-23-3
- Grade：-
- Qualification：-
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Overview
The SST504 is a current regulating diode from the SST500 series, manufactured by Linear Integrated Systems. It provides a nominal forward current of 0.75 mA with a minimum of 0.600 mA and maximum of 0.900 mA. The device operates within a peak operating voltage of 50 V and features a limiting voltage of 1.9 V at the specified current. Key electrical parameters include a dynamic impedance of 1.5 MΩ and a knee impedance of 0.4 MΩ. It is housed in a SOT-23 3L package and supports continuous power dissipation of 350 mW.
Feature Summary
- Zero biasing required for operation
- Wide current range availability across the series
- Surface mount SOT-23 3L packaging
Applications
- Test instrumentation
- Medical applications
Procurement Notes
Verify the specific ordering suffix to confirm compliance with RoHS standards and ensure the package matches the SOT-23 3L configuration. Confirm that the part number corresponds to the SST504 variant to guarantee the correct nominal current rating of 0.75 mA. Cross-reference the manufacturer's documentation for any custom part call-outs if non-standard configurations are required.
Selection Notes
Select the SST504 when a stable current of approximately 0.75 mA is required without external biasing components. Ensure the circuit design accommodates the 50 V peak operating voltage limit. Consider the thermal derating requirements above 25°C, as continuous power dissipation decreases by 2.8 mW per degree Celsius increase in temperature.
Part Context
This component belongs to the SST500 series of current regulating diodes, which replaces older silicon-based solutions. The series offers a broad spectrum of current options ranging from 0.19 mA to 5.6 mA, allowing designers to choose precise current levels for various low-power applications while maintaining a compact surface-mount footprint.
Replacement Considerations
The datasheet indicates this series replaces the Siliconix/Vishay SST502 series. Verify pin compatibility and electrical characteristics against legacy parts before substitution.
