The LT® 3012B is a high voltage, micropower low dropout linear regulator. The device is capable of supplying 250mA of output current with a dropout voltage of 400mV. Designed for use in battery-powered or high voltage systems, the low quiescent current (40µA operating) makes the LT3012B an ideal choice. Quiescent current is also well controlled in dropout.

Other features of the LT3012B include the ability to operate with very small output capacitors. The regulators are stable with only 3.3µF on the output while most older devices require between 10µF and 100µF for stability. Small ceramic capacitors can be used without any need for series resistance (ESR) as is common with other regulators. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting and reverse current protection.

The device is available with an adjustable output with a 1.24V reference voltage. The LT3012B regulator is available in the 16-lead TSSOP and 12 pin low profile (0.75mm) (4mm × 3mm) DFN packages with an exposed pad for enhanced thermal handling capability.

• Wide Input Voltage Range: 4V to 80V
• Low Quiescent Current: 40µA
• Low Dropout Voltage: 400mV
• Output Current: 250mA
• No Protection Diodes Needed
• Adjustable Output from 1.24V to 60V
• Stable with 3.3µF Output Capacitor
• Stable with Aluminum, Tantalum or Ceramic Capacitors
• Reverse-Battery Protection
• No Reverse Current Flow from Output to Input
• Thermal Limiting
• Thermally Enhanced 16-Lead TSSOP and 12-Pin(4mm × 3mm) DFN Packages

The IFX78M05 monolithic 3-terminal positive voltage regulator employs internal current-limiting, thermal shutdown and safe-area compensation, making it extremely robust. The IFX78M05 is available in a fixed 5V version and is capable of delivering an output current of 0.5 A. This regulator can provide local on-card regulation, eliminating the distribution problems associated with single point regulation. This linear voltage regulator is designed for a wide variety of applications and suitable for use in harsh environments. The short-circuit current limit, limits the output current of the device. The safe-area protection feature limits the internal power dissipation, in case the internal power dissipation becomes too high, the thermal shutdown implemented prevents the device from overheating. The 5V voltage regulator is available in the TO-252 package.

• 500 mA Output Current Capability
• High Input Voltage Range: up to 35 Volts
• Available in Fixed 5V Output Voltage Version
• Wide temperature range Tj
• -40 °C to +125 °C
• Over temperature Protection
• Short Circuit Current Limit
• Safe-Area Protection
• Thermally Optimized Packages
• Green Product (RoHS compliant)

The LM337T is an adjustable 3-terminal Negative Voltage Regulator, capable of supplying in excess of -1.5A over an output voltage range of -1.2V to -37V. This regulator is 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 LM137 series features internal current limiting, thermal shutdown and safe-area compensation, making them virtually blowout-proof against overloads. The LM337T serves a wide variety of applications including local on-card regulation, programmable-output voltage regulation or precision current regulation. The LM337T is ideal complements to the LM117/LM317 adjustable positive regulators.

• Output voltage adjustable from -1.2 to -37V
• 1.5A Output current specified, -55 to +150°C
• Line regulation typically 0.01%/V
• Load regulation typically 0.3%
• 0.002%/W Excellent thermal regulation
• 77dB Ripple rejection
• Excellent rejection of thermal transients
• 50ppm/°C Temperature coefficient
• Temperature-independent current limit
• Internal thermal overload protection