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High Input Voltage SMPS Start-up / Linear Regulator
The Supertex LR645 is a high input voltage, low output current linear regulator. It has a 3-terminal fixed output voltage version available in TO-92, TO-220 and SOT-89 packages, as well as an adjustable voltage version available in an 8-lead SOIC package. The 3-terminal version functions like any other low voltage 3-terminal regulator except it allows the use of much higher input voltages. When used in a SMPS startup circuit, it eliminates the need for large power resistors.
http://www.supertex.com/pdf/datasheets/LR645.pdf -
High Input Voltage Adjustable 3-Terminal Linear Regulator
The Supertex LR8 is a low output current, high voltage, adjustable linear regulator. It has a wide operating input voltage range of 13.2V to 450V. The output voltage can be adjusted from 1.20V to 440V provided that the input voltage is at least 12V greater than the output voltage. The output voltage can be adjusted by means of two external resistors R1 and R2 as shown in the typical application circuits. The LR8 regulates the voltage difference between Vout and ADJ pins to a nominal value of 1.20V. The 1.20V is amplified by the external resistor ratio R1 and R2. An internal constant bias current of typically 10µA is connected to the ADJ pin. This increases Vout by a constant voltage of 10µA times R2.
http://www.supertex.com/pdf/datasheets/LR8.pdf -
LM137HV/LM337HV 3-Terminal Adjustable Negative Regulators (High Voltage)
The LM137HV/LM337HV are adjustable 3-terminal negative voltage regulators capable of supplying in excess of −1.5A over an output voltage range of −1.2V to −47V. These regulators are exceptionally easy to apply, requiring only 2 external resistors to set the output voltage and 1 output capacitor for frequency compensation. The circuit design has been optimized for excellent regulation and low thermal transients. Further, the LM137HV series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads.
Features
- 1.5A output current guaranteed, −55˚C to +150˚C
- Output voltage adjustable from −1.2V to −47V
- Internal thermal overload protection
- P+ Product Enhancement tested
- Standard 3-lead transistor package
- Output short circuit protected
- Line regulation typically 0.01%/V
- Load regulation typically 0.3%
- Excellent thermal regulation, 0.002%/W
- 77 dB ripple rejection
- Excellent rejection of thermal transients
- 50 ppm/˚C temperature coefficient
- Temperature-independent current limit
http://www.national.com/ds.cgi/LM/LM137HV.pdf -
50 mA, High Voltage, Micropower Linear Regulator
The ADP1720 is a high voltage, micropower, low dropout linear regulator. Operating over a very wide input voltage range of 4 V to 28 V, the ADP1720 can provide up to 50 mA of output current. With just 28 μA of quiescent supply current and a micropower shutdown mode, this device is ideal for applications that require low quiescent current.
http://www.analog.com/UploadedFiles/Data_Sheets/ADP1720.pdf - MAX5023, MAX5024 65V, Low-Quiescent-Current, High-Voltage Linear Regulators with µP Reset and Watchdog Timer
High-Voltage, Low-Quiescent-Current Linear Regulators Ideal for Automotive and Industrial Applications
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