Lab Power Supply - This is a high quality power supply with a continuously variable stabilised output adjustable at any value between 0 and 30VDC. The circuit also incorporates an electronic output current limiter that effectively controls the output current from a few milliamperes (2 mA) to the maximum output of three amperes that the circuit can deliver. This feature makes this power supply indispensable in the experimenters laboratory as it is possible to limit the current to the typical maximum that a circuit under test may require, and power it up then, without any fear that it may be damaged if something goes wrong. There is also a visual indication that the current limiter is in operation so that you can see at a glance that your circuit is exceeding or not its preset limits. ….(electronic schematic added 11/08)

Laboratory Power Supply - 1.2V, 12V with regulated current limiter through resistors ….(circuit design added 11/08)

LAN Power Supply Generates Isolated 9V - 04/11/96 EDN-Design Ideas: (design idea added 3/03)

Latest Technology PT IGBTs vs. Power MOSFETs - Application Note Microsemi-formerly Advanced Power Technology APT0302  ( app note added 04/05/06)

LB-18: Linear Brief 18 +5 to-15 Volts DC Converter - National Semiconductor Application Note  (app note added 2/06)

LB-28: Linear Brief 28 General Purpose Power Supply - National Semiconductor Application Note  (app note added 2/06)

LB-4: Fast Compensation Extends Power Bandwidth - National Semiconductor Application Note  (app note added 2/06)

LB-46: Linear Brief 46 a New Production Technique for Trimming Voltage Regulators - National Semiconductor Application Note  (app note added 2/06)

LB-47: Linear Brief 47 High Voltage Adjustable Power Supplies - National Semiconductor Application Note  (app note added 2/06)

LB-9: Linear Brief 9 Universal Balancing Techniques - National Semiconductor Application Note  (app note added 2/06)

LCD Bias & Backup Supply Applications for the LT1316 Micropower DC/DC Converter - DN166  Design Notes (Linear Technology) (app note added 6/06)

Li ion Boost Circuit uses No inductors - 09/12/97 EDN-Design Ideas:   -- Circuit to maintain regulated3.3V supply for portable applications.....(design idea added 3/03)

LIER Circuit helps Power Supply Efficiency - 02/16/95 EDN-Design Ideas: (design idea added 3/03)

Linear Regulator Converts 3.3 to 2.9V - 03/16/95 EDN-Design Ideas: (design idea added 6/06)

LM2577 Three Output Isolated Flyback Regulator - National Semiconductor Application Note 01 May1998 (app note added 7/02)

LM2622 Step-Up DC/DC Converter Evaluation Board - National Semiconductor Application Note  (app note added 2/06)

LM267X 3A 5A Evaluation Board - The LM267X evaluation board was developed for the evaluation of LM267X SIMPLE SWITCHER series of 3 Amp and 5 Amp high efficiency step-down (Buck) switching voltage regulators.  (app note added 3/05)

LM317 Regulator Circuit - (diagram added 05/06/07)

LM317 Regulator With Pass Transistor - (circuit diagram added 6/07)

LM317 Variable Voltage Regulator - (circuit diagram added 6/07)

LND1 Series-High Voltage Off-Line Linear Regulator - Supertex Semiconductors  (app note added 2/06)

Logic PSU with OverVoltage Protection - 6 volt regulated power supply for TTL and 74LS series integrated circuits, includes output Overvoltage fault protection (added 6/06)

Long Range FM Transmitters - (electronic design added 6/07)

Low Cost Circuit Biases VCOs for Cable & TV - 11/20/97 EDN-Design Ideas:   -PLLs are useful in a variety of applications, most notably cable and TV tuners.....(design idea added 3/03)

Low cost feedback circuit Boosts efficiency - 01/21/99 EDN-Design Ideas: [Note: File contains multiple circuits, scroll to find this circuit]  To implement a step-up converter with a current output, designers often simply connect the load in place of the top resistor in a resistive-di.....(design idea added 11/05)

Low Cost High Efficiency 42A DC/DC Converter - DN225  Design Notes (Linear Technology) (app note added 1/06)

Low Cost PolyPhase™ DC/DC Converter Delivers High Current - DN234  Design Notes (Linear Technology) (app note added 1/06)

Low Cost Surface Mount DC/DC Converter Delivers 100A - DN215  Design Notes (Linear Technology) (app note added 1/06)

Low Dropout 550kHz DC/DC Controller Operates from Inputs as Low as 2V - DN208  Design Notes (Linear Technology) (app note added 1/06)

Low dropout linear regulators deliver constant currents - 05/11/06 EDN-Design Ideas: High-side current source uses a positive-output linear voltage regulator to deliver 25 mA.....(design idea added 05/06/07)

Low dropout linear regulators double as voltage supervisor circuits - 03/16/06 EDN-Design Ideas: You can use this circuit as a voltage supervisor or as a controlled-characteristic linear-voltage regulator.....(design idea added 05/06/07)

Low dropout regulator SMPS cascade suppress ripple maintain efficiency - 08/03/06 EDN-Design Ideas: Two regulators work better than one in noise-sensitive applications.....(design idea added 10/06)

Low Noise Micropower DC/DC Converters LT1500/LT1501 - DN151  Design Notes (Linear Technology) (app note added 1/06)

Low Parts Count DC/DC Converter Circuit with 3.3V & 5V Outputs - DN69  Design Notes (Linear Technology) (app note added 1/06)

Low Power Converter has Galvanic Isolation - 07/02/98 EDN-Design Ideas: The circuit in Figure 1 protects the ac line against disturbances. It operates by switching off the power supply upon detection of undervoltage or overvoltage conditions. The circuit thus protects refrigerators, washing machines, air conditioners, and other appliances from permanent damage that could.....(design idea added 05/07)

Low Power DC-to-DC Converter - The circuit above is a DC to DC converter using a standard 12 VAC center tapped power transformer wired as a blocking oscillator. The circuit is not very efficient but will produce a high voltage usable for low power applications. The input battery voltage is raised by a factor of 10 across the transformer and further raised by a voltage tripler....(added 04/05)

Low Power FM Transmitter - Useful to retransmit the hi-fi to another FM receiver nearby, or as a wireless mic  (electronic design added 9/02)

Lower DC/DC converter ripple By using optimum capacitor hookup - 10/31/02 EDN-Design Ideas: Low-ripple-voltage positive-to-negative dc/dc converters find use in many of today's high- frequency and noise-sensitive disk drives, battery-powered devices, portable computers, and automotive applications. Like.....(design idea added 3/05)

LT1120A-Micropower Regulator with Comparator & Shutdown - Linear Technology Switching Regulator (app note added 6/06)

LT1304: Micropower DC/DC Converter with Independent Low-Battery Detector - DN120  Design Notes (Linear Technology) (app note added 2/06)

LT1307 Single-Cell Micropower Fixed-Frequency DC/DC Converter Needs No Electrolytic Capacitors - DN128  Design Notes (Linear Technology) (app note added 2/06)

LT1500/LT1501 Low Noise Micropower DC/DC Converters - DN151  Design Notes (Linear Technology) (app note added 1/06)

LTC1446/LTC1446L: World’s First Dual 12-Bit DACs in SO-8 - DN131  Design Notes (Linear Technology) (app note added 1/06)

LTC1590: Applications Versatility of Dual 12-Bit DAC - DN167  Design Notes (Linear Technology) (app note added 1/06)

LTC2400 Differential to Single-Ended Converter for Single 5V Supply This Converter has High Accuracy Very Low Offset & Offset Drift, - Design Solutions 6  Design Notes (Linear Technology)  (app note added 1/06)

LTC2400 High Accuracy Differential to Single-Ended Converter for ±5V Supplies - DN207)  Design Notes (Linear Technology) (app note added 1/06)

LTC2400 High Accuracy Differential to Single-Ended Differential to Single-Ended Converter has Very High Uncalibrated Accuracy & Low Offset & Drift - Design Solutions 1  Design Notes (Linear Technology)  (app note added 1/06)

LTM4600 DC/DC µModule Thermal Performance Application Note - AN103 Linear Technology This App Note provides an extensive guideline for the thermal performance of the LTM4600 µmodule. The LTM4600 is characterized with and without heatsinking over an extended operating temperature range. De-rating curves are derived with the different heatsinking types,....(appnote added 1/06)