Cissoid CHT-LDNS Series

The Helios CHT-LDNS high temperature, negative 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 CHT-LDNS series from Cissoid has a minimum dropout voltage of -2V down to -20v with a maximum output current of 1A at 225°C, with a total accuracy of ±3% and a maximum output voltage temperature drift of 80ppm.

• High temperature, negative low-dropout linear voltage regulator
• Voltage reference values of -2.5V, -3.3V, -5V, -5.5V, -9V, -10V, -12V, -13V and -15V
• Dropout voltage of -2V down to -20V
• Output voltage programmable by bonding option (bare die version)
• Quiescent current consumption of 3mA
• Maximum output current of 1A at 225°C (For -2.5V version, max current is 100mA)
• Total accuracy of ±3%
• 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-LDNS series from Cissoid include:

• Well logging
• Automotive
• Aeronautics
• Aerospace

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

1.|Vin| max=30V2. For -2.5V version, max current is 100mA3. Above +225°C (T_j), a minimum load current of few mA could be required

4. Max power dissipation depends on packaging

5. ppm are defined as [d(Vout)/d(T)]/Vout. For -15V mode, 40ppm corresponds to 600µV/°C

6. Defining “x” as the nominal voltage, the line regulation is better than x/5 mV/V for|Vin|>14V and better than x mV/V for |Vin|≤14V. For 2.5V output voltage version, line regulation is better than 8mV/V for |Vin|>14V and better than 3mV/V for |Vin|≤14V

7. This includes the packaging parasitic resistor

8. 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

9. Defining “x” as the nominal voltage, the minimum power supply rejection ratio is …(tbd)…

10 Defining “x” as the nominal voltage, typical noise level is …(tbd)…

11. short circuit current for 2.5V typical is 1A and max is 1.3A