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

The TPS73118DBVT is a 1.8V fixed output low-dropout (LDO) Linear Regulator with reverse current protection uses a new topology, an NMOS pass element in a voltage-follower configuration. This topology is stable using output capacitors with low equivalent series resistance (ESR) and even allows operation without a capacitor. The device also provides high reverse blockage (low reverse current) and ground pin current that is nearly constant over all values of output current. The device uses an advanced BiCMOS process to yield high precision while delivering very low-dropout (LDO) voltages and low ground pin current. Current consumption, when not enabled, is less than 1µA and ideal for portable applications. The extremely low output noise is ideal for powering VCOs. These devices are protected by thermal shutdown and fold-back current limit.

• Stable with or without capacitors of all types
• Excellent load transient response-with or without optional output capacitor
• New NMOS topology provides low reverse leakage current
• 30µVrms Low noise (10kHz to 100kHz)
• 0.5% Initial accuracy
• 1% Overall accuracy over line, load and temperature
• <1µA Quiescent current (IQ) in shutdown mode
• Thermal shutdown and specified minimum and maximum current limit protection
• Green product and no Sb/Br

The LTC®4357 is a positive high voltage ideal diode controller that drives an external N-channel MOSFET to replace a Schottky diode. When used in diode OR and high current diode applications, the LTC4357 reduces power consumption, heat dissipation, voltage loss and PC board area. The LTC4357 easily ORs power sources to increase total system reliability.

In diode-OR applications, the LTC4357 controls the forward voltage drop across the MOSFET to ensure smooth current transfer from one path to the other without oscillation. If the power source fails or is shorted, a fast turn-off minimizes reverse current transients.