A 13.8V 20A PSU:  This is a Regulated DC power supply with short circuit protection and with current limiter.  (added 10/05)

A 9V 2A PSU:  A simple 9 Volt 2 amp supply using a single IC regulator.  There is little to be said about this circuit. All the work is done by the regulator. The 78S09 can deliver up to 2 amps continuous output whilst maintaining a low noise and very well regulated supply. The circuit will work without the extra components, but for reverse polarity protection a 1N5400 diode is provided at the input, extra smoothing being provided by C1. The output stage includes C2 for extra filtering, if powering a logic circuit than a 100nF capacitor is also desirable to remove any high frequency switching noise.  (added 11/05)

A Method to Determine How Much Power a SOT23 can Dissipate in an Application:  Microchip Application Note - Published 18-Jul-01   (app note added 2/06)

A Micropower Voltage Reference:  National Semiconductor - Application Note  (app note added 2/06)

A New High Efficiency Monolithic Synchronous Step-Down Regulator Works with Single or Dual Li-ION Batteries:  DN201 -  Design Notes (Linear Technology) (added 1/06)

A New Production Technique for Trimming Voltage Regulators:  National Semiconductor - Application Note  (app note added 6/06)

A Simple Ultra-Low Dropout Regulator:  DN32 -  Design Notes (Linear Technology) (added 1/06)

AB-11: Application Brief 11 High-Efficiency Regulator has Low Drop-Out Voltage:  National Semiconductor - Application Note  (app note added 2/06)

AB-12: Application Brief 12 Wide Adjustable Range PNP Voltage Regulator:  National Semiconductor - Application Note  (app note added 2/06)

Active Clamp Forward Reference Design:  This reference design is an active-clamp forward converter that can deliver up to 24 A of continuous current at 5 V from an input range of 35 V to 75 V. The active-clamp topology with self-driven secondary synchronous MOSFETs allows the device to achieve high efficiencies. The design includes remote sense connections for point-of-load regulation and is foot print compatible with Half Brick Modules. (circuit design added 3/05)

Active Preloading Provides Sinking Capability:  01/02/97 EDN-Design Ideas -- A simple add-on circuit enables a unipolar power supply, usually a current-sourcing circuit only, to sink current from a load/ (added 3/’03)

Added components improve switching regulator stability:  09/29/05  EDN -- Design Ideas  /   (added 11/05)   This Design Idea shows how adding one or two passive parts can reduce a hysteretic constant-on-time switched-mode voltage regulator's output voltage ripple and reduce its susceptibility to variations in external load capacitance and ESR (equivalent series resistance). The regulator operates much like a pure hysteretic switcher. The device's internal one-shot sets its pass transistor's on-time, making it less prone to frequency runaway but still susceptible to noise injected at the regulator's FB (feedback) pin. To switch cleanly with predictable frequency and duty cycle, the switcher requires application of approximately 50 to 100 mV of ripple voltage to the feedback pin. This Design Idea shows how four circuit implementations using National's LM5007 and LM5008 regulators satisfy the important feedback-ripple requirements by adjusting on-resistance and maintaining a nearly constant ....

Adjustable 3Terminal Regulator for LowCost Battery Charging Systems:  National Semiconductor Application Notes, 28-Jun-1996/ (added 3/’03)

Adjustable Power Supply using LM317:  voltage regulator for1.2V to35-Volt output voltages and up to1A load (Electronic circuit added 5/02)

Adjustable Power Supply:  well filtered variable1.2-30 volts at5 amps using LM338K (Electronic circuit added 5/02)

Alarm PSU:  (added 6/03)

AN-103: LM340 Series Three Terminal Positive Regulators:  National Semiconductor - Application Note  (app note added 2/06)

AN-1118:Simple Regulator Provides ±12V from 5V Source:  National Semiconductor - Application Note  (app note added 2/06)

AN-1378: Method for Calculating Output Voltage Tolerances in Adjustable Regulators:  National Semiconductor - Application Note  (app note added 2/06)

AN-161: Application Note 161 IC Voltage Reference has 1 ppm per Degree Drift:  National Semiconductor - Application Note  (app note added 2/06)

AN-178: Applications for an Adjustable IC Power Regulator:  National Semiconductor - Application Note  (app note added 2/06)

AN-18: Thermometer Applications of the REF-02:  AN-18 - Analog Devices Application Note  (app note added 2/06) 

AN-181: 3-Terminal Regulator is Adjustable:  National Semiconductor - Application Note  (app note added 2/06)

AN-182: Improving Power Supply Reliability with IC Power Regulators:  National Semiconductor - Application Note  (app note added 2/06)

AN-21: 4-20 mA Digital-to-Process Current Transmitter:  AN-21 - Analog Devices Application Note  (app note added 2/06)  Describes a 3 I.C. Digital to 4-20 mA Current Output Circuit (DAC08, REF01 and OP221)

AN-214: Ground Rules for High Speed Circuits:  AN-214 - Analog Devices Application Note  (app note added 2/06)  Layout and Wiring Are Critical in Video Converter Circuits.

AN-23: The LM105-An Improved Positive Regulator:  National Semiconductor - Application Note  (app note added 2/06)

AN28 the ZLDO Series of Low Dropout Voltage Regulators:  Zetec Semiconductors  - Applications Notes - The ZLDO series of regulators provide the lowest dropout voltage currently available in their class. Application examples covering dropout and other important features of the series are discussed.   (added 2/06)

AN-347: Shielding and Guarding:  AN-347 - Analog Devices Application Note  (app note added 2/06)  How to Exclude Interference-Type Noise. What to do and Why to do it-A Rational Approach

AN-348: Avoiding Passive-Component Pitfalls:  AN-348 - Analog Devices Application Note  (app note added 2/06)  The Wrong Passive Component Can Derail Even the Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.

AN-349: Keys to Longer Life for CMOS:  AN-349 - Analog Devices Application Note  (app note added 2/06)  Here's How CMOS Can be Protected Against Abuse

AN-56: 1.2 Volt Reference:  National Semiconductor - Application Note  (app note added 2/06)

AN-711: LM78S40 Switching Voltage Regulator Applications:  National Semiconductor - Application Note   (app note added 2/06)

AN-713: The Effect of Long-Term Drift on Voltage References:  AN-713 - Analog Devices Application Note  (app note added 2/06) 

AN-715: LM385 Feedback Provides Regulator Isolation:  National Semiconductor - Application Note   (app note added 2/06)

AN792: A Method to Determine How Much Power a SOT23 can Dissipate in an Application:  Microchip Application Note - Published 18-Jul-01   (app note added 2/06)

AN860: RFRXD0420 ASK Receiver Reference Design:  Microchip Application Note - Published 27-Dec-02   (app note added 2/06)

AN-H32: HT0640 for Electronic Line Switch:  Supertex Semiconductors (app note added 2/06)

AN-H33: HV8XX Series: EL Lamp Driver Circuits:  Supertex Semiconductors (app note added 2/06)

Application Hint 30:  Micrel App Note MIC2527 Voltage Drop, Packaging, and PCB Layout (app note added 6/06)

Applications for an Adjustable IC Power Regulator:  National Semiconductor Application Note 04-Nov-1995/ (app note added 3/’03)

Automatic Local Sensing Improves Regulation:  1/04/96 EDN-Design Ideas / (Electronic Circuit diagram added 03/03)

Autoreferencing circuit nulls out sensor errors:  01/24/02 EDN Design Ideas  /  (Electronic circuit design added 02/05)  The autoreferencing circuit in Figure 1 nulls out the error of a sensor, such as a pressure transducer, at its reference level-for example, at ambient pressure. The circuit is an analog-digital-feedback control system that uses a digitally programmable potentiometer to provide the variability. ...

Avoiding Passive-Component Pitfalls:  AN-348 - Analog Devices Application Note  (app note added 2/06)  The Wrong Passive Component Can Derail Even the Best Op Amp or Data Converter. Here Are Some Basic Traps to Watch For.