Cissoid CHT-LDOP Series

The Helios CHT-LDOP high temperature, low-dropout linear voltage regulator series from Cissoid offers an output voltage range between 2.5V and 15V. These voltage regulators are compatible with high temperature environments with a typical operation temperature range from -55°C to +225°C. The LDOP series from Cissoid has a minimum dropout voltage of 1V for load currents lower than 400mA and 2V with a 1A load current at +225°C, with a total accuracy of ±2% and a maximum output voltage temperature drift of 80ppm.

• High temperature, low-dropout linear voltage regulator
• Voltage reference values of 2.5V, 3.3V, 5V, 5.5V, 5.6V, 7.5V, 9V, 10V, 12V, 13V and 15V
• Dropout voltage of 1V to 20V at lower than 400mA
• Dropout voltage of 2V to 20V at 1A
• Quiescent current consumption of 3mA
• Maximum output current of 1A at 225°C
• Total accuracy of ±2%
• Typical operating temperature range −55°C to +225°C (operational up to 300°C)
• Maximum drift with temperature 80ppm
• Validated at +225°C for 43800 hours (and still on-going)
• Available in TO-254 package and bare die available on request

Typical Applications for the CHT-LDOP series from Cissoid include:

• Well logging
• Automotive
• Aeronautics
• Aerospace

The below table gives the full specifications of the Cissoid CHT-LDOP series:

1. The maximum input voltage V_in is V_out +20V or 30V, whichever is less

2. Above +225°C (T_j), a minimum load current of few mA could be required

3. Max power dissipation depends on packaging

4. ppm are defined as 1e-6x[d(Vout)/d(T)]/Vout. For a nominal output of 15V, 40ppm corresponds to 600µV/°C

5. Defining “x” as the nominal voltage, the line regulation is better than x/5 mV/V

6. This includes the packaging parasitic resistance for TO-254 packages

7. Defining “x” as the nominal voltage, the typical quiescent current at 2V dropout can be approximated as 2.95+x/13 in mA @ -55°C and 2.65+x/13 in mA at 225°C

8. Preliminary data