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Solutions Search - Current Source Solutions

LT3090 Two-Terminal Current Source

Sep 15th 2016
The LT®3090 is a 600mA, low dropout negative linear regulator that is easily parallelable to increase output current or spread heat on surface mounted boards. Designed with a precision current reference followed by a high performance rail-to-rail voltage buffer, this regulator finds use in applications requiring precision ...

Circuit 

 

LTC3623 Programmable 5A Current Source

Aug 15th 2016
TheLTC3623 is a high efficiency, monolithic synchronous buck regulator in which the output voltage is programmed with a single external resistor. The accurate internally generated 50µA current source on the ISET pin allows the user to program an output voltage from 0V to 0.5V below VIN. The user can also directly drive ...

Circuit 

 

LT8714 300kHz, Bidirectional 1A Current Source

Dec 17th 2015
The LT®8714 is a synchronous PWM DC/DC controller designed for a four quadrant output converter. The output voltage cleanly transitions through zero volts with sourcing and sinking output current capability. ...

Circuit 

 

LT6375 ±5mA Howland Current Source

Aug 31st 2015
The LT®6375 is a unity-gain difference amplifier which combines excellent DC precision, a very high input common mode range and a wide supply voltage range. It includes a precision op amp and a highly-matched thin film resistor network. It features excellent CMRR, extremely low gain error and extremely low gain drift. ...

Circuit 

 

Two LTM8052As Used to Regulate Positive or Negative Voltage (and Current) Across a Peltier Device

Sep 23rd 2014
The LTM®8052/LTM8052A is a 36VIN, 5A, 2-quadrant constant-voltage, constant-current (CVCC) step-down μModule® regulator. Included in the package are the switching controller, power switches, inductor and support components. Operating over an input voltage range of 6V to 36V, the LTM8052/LTM8052A supports an output ...

Circuit 

 

LT3086 Adjustable Voltage Controlled Current Source

Dec 3rd 2013
The LT®3086 is a multi-feature, low dropout, low noise 2.1A linear regulator that operates over a 1.4V to 40V input supply range. Dropout voltage at 2.1A is typically 330mV. One resistor sets output voltage from 0.4V to 32V. Output voltage tolerance is guaranteed to ±2% over line, load and temperature. The LT3086 ...

Circuit LTspice 

 

Using the LT3081 as a Current Source

May 20th 2013
The LT®3081 is a 1.5A low dropout linear regulator designed for rugged industrial applications. Key features of the IC are the extended safe operating area (SOA), output current monitor, temperature monitor and programmable current limit. The LT3081 can be paralleled for higher output current or heat spreading. The device ...

Circuit 

 

Programmable Switching 1.5A Current Source

Dec 13th 2011
The LTC3600 is a high efficiency, monolithic synchronous buck regulator whose output is programmed with just one external resistor. The accurate internally generated 50μA current source on the ISET pin allows the use of a single external resistor to program an output voltage that ranges from 0V to 0.5V below VIN. The VOUT voltage ...

Circuit 

 

LTM8052 ±5A, 2.5V (2-Quadrant) μModule Voltage Regulator

Sep 27th 2011
The LTM8052 is a 36VIN, 5A, 2-quadrant constant-voltage, constant-current (CVCC) step-down μModule® regulator. Included in the package are the switching controller, power switches, inductor and support components. Operating over an input voltage range of 6V to 36V, the LTM8052 supports an output voltage range of 1.2V ...

Circuit LTspice 

 

Two Terminal 3A Current Source

Jan 27th 2011
The LT3083 is a 3A low dropout linear regulator that can be paralleled to increase output current or spread heat on surface mounted boards. Architected as a precision current source and voltage follower, this new regulator finds use in many applications requiring high current, adjustability to zero, and no heat sink. The device ...

Circuit 

 

IC Current Sources - LT3092

Robert Dobkin - Chief Technical Officer Sep 15th 2009
Current sources have been a well known but theoretical circuit component. Unlike voltage sources, a 0.01% accurate 2-terminal current source has been an elusive component that is not easily available and difficult to design. With the introduction of the LT3092, the current source as a drop-in component becomes a reality. The ...

Video LTspice 

 

Parallel Current Sources For Higher Current 300mA Output

Apr 22nd 2009
The LT3092 can easily be paralleled for higher current outputs ...

Circuit 

 

High Voltage 100mA Current Source

Apr 22nd 2009
An external zener diodes protects the LT3092 and allows the part to be used in high voltage applications. ...

Circuit 

 

High Accuracy 10mA Current Source

Apr 22nd 2009
An external reference improves the initial accuracy and temperature drift of the LT3092 current source. ...

Circuit 

 

Adjustable Two Terminal 200mA Current Source

Apr 22nd 2009
The LT3092 requires only two resistors to set the current between 0.5mA and 200mA ...

Circuit 

 

2-Terminal Temperature-to-Current Thermometer Suitable for Use at the End of Long Wire Runs

Apr 22nd 2009
By adding the LT3092 to a thermistor kit along with three 0.1% accuracy resistors and one final trim, a very accurate 2-terminal temperature-to-current converter can be built. This circuit measures 700μA operating current at 0°C, dropping by 2μA every degree until 100°C, at which point the current measures 500μA. The obvious ...

Circuit 

 

DAC Controlled 100mA Current Source

Apr 22nd 2009
The LT3092 easily interfaces with an external DAC to allow digital current control. ...

Circuit 

 

Two Terminal 500mA Current Source

Aug 26th 2008
The LT3085 linear regulator can easily be configured as a two terminal current source ...

Circuit 

 

Precision Nanoamp Bidirectional Current Source

Aug 6th 2007
This circuit sources and sinks just nanoamps of current with precision due to the low input bias current of the CMOS op amps. A buffered difference amplifier and an integrator force the voltage across a 10Megaohm set resistor to be 1/1000 of the control input voltage in either polarity. ...

Circuit 

 

Two Terminal 1A Current Source

Jul 20th 2007
The LT3080 linear regulator can easily be configured as a two terminal current source ...

Circuit 

 

LTC6078 Precision Ground Referenced Voltage Controlled Current Source

Aug 16th 2005
The control voltage, Vin, is converted to a charge on a capacitor that is referenced to ground. This charge is transferred to place a differential voltage across the output current programming resistor. The output current then flows into a ground referenced load for a precision single supply circuit without the need for a voltage ...

Circuit 

 

Reduced Power Infra-Red Diode Driver

Aug 16th 2005
Infra-Red LEDs can be used as continuously operating beams of light. Sensing a break in the path of light between the source and a photodiode receiver is often used in safety and alarm systems. To extend the run-time of the light source, the diode conducts the minimum current necessary, in this case 10mA. Controlling the duty ...

Circuit 

 

LTC6101/LT3021 Voltage Controlled Current Source

Mar 16th 2005
Adding a current sense amplifier in the feedback loop of an adjustable low dropout voltage regulator creates a simple voltage controlled current source. The range of output current sourced by the circuit is set only by the current capability of the voltage regulator. The current sense amplifier senses the output current and ...

Circuit LTspice 

 

Bidirectional Current Source

Jul 30th 2004
The LT1990 is a differential amplifier with integrated precision resistors. The circuit shown is the classic Howland current source, implemented by simply adding a sense resistor. ...

Circuit 

 

LTC2053 Precision Voltage Controlled Current Source

Jul 12th 2001
The ultra-precise LTC2053 instrumentation amplifier is configured to servo the voltage drop on sense resistor R to match the command VC. The LTC2053 output capability limits this basic configuration to low current applications. ...

Circuit 

 

0A to 2A Current Source

Feb 1st 2001
The LT1995 amplifies the sense resistor drop by 5V/V and subtracts that from VIN, providing an error signal to an LT1880 integrator. The integrated error drives the PMOSFET as required to deliver the commanded current. ...

Circuit 

 

Two Terminal Current Regulator

Dec 3rd 1997
The LT1635 combines an op amp with a 200mV reference. Scaling this reference voltage to a potential across resistor R3 forces a controlled amount of current to flow from the +terminal to the –terminal. Power is taken from the loop. ...

Circuit 

 

Ground Referred Precision Current Sources

Jun 25th 1997
The zero drift LTC2054 instrumentation amplifier can be used in conjunction with one of Linear Technology's precision, low temperature drift shunt voltage references (in this example the LT1634) to create a precision, ground referred current source. ...

Circuit 

 

LT1963A Adjustable Current Source

Oct 6th 1994
The LT®1963A series are low dropout regulators optimized for fast transient response. The devices are capable of supplying 1.5A of output current with a dropout voltage of 340mV. Operating quiescent current is 1mA, dropping to <1μA in shutdown. Quiescent current is well controlled; it does not rise in dropout as it ...

Circuit 

 

LT1006/LTC1043 Voltage Controlled Current Source with Ground Referred Input and Output

Nov 16th 1992
A flying capacitor device such as the LTC1043 can produce a precision voltage differential over a wide common mode range. Here it converts a ground referred input voltage directly to a differential voltage across a fixed resistor which then forces a precise current sourced at the circuit output. ...

Circuit 

 

Two Terminal Current Source

Jan 1st 1987
The opamp buffers the upper potential of a shunt regulator to set a voltage drop on R1 equal to the reference. The net current to RL is the programmed R1 current plus the quiescent supply current of the opamp passing through the reference. ...

Circuit 

 

Thermally Controlled NiCad Charger

Nov 1st 1983
A voltage controlled current (maximum of 1A) is used to charge a NiCd battery. The control voltage is derived from the temperature difference between the battery and the ambient air. The charge current is reduced as the battery heats up. ...

Circuit 

 

Precision Current Source

Nov 1st 1983
A non-inverting amplifier configuration can force an input control voltage across a ground referred resistor. This creates a precise amount of current flow. This current must be sunk by the external transitors so the same amount of current flows from ground and sourced to a negative supply referred load circuit. ...

Circuit LTspice