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LM2577 Step-Up
Voltage Regulator Reg
LM2577T-ADJ
£0.00
The 2577T is a step-up regulator device finding many applications in flyback & forward convertor switching regulation. A typical arrangement requires only a few external components to realise a working design. Using existing value inductors & flyback transformers simplifies circuit design. Output currents up to 3A are possible with this device from a wide range of input voltages 3.5V to 40V. Output voltages up to 60V can be developed depending on the output current required. Step-up is achieved using the internal 52k Hz fixed frequency oscillator & developing a voltage across an inductor or transformer. The current from the device charges the output capacitor & feedback maintains it at a constant voltage. A load can then be connected to the output which is regulated to the desired voltage. Other features of the device are a soft start mode internal protection against overcurrent limit thermal limiting & undervoltage lock-out. Applications include simple boost regulators flyback & forward regulators & multiple output regulators. ...
Archived Product
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LM2917N Frequency To
Voltage Convertor
LM2917N
£3.79
The 14-pin DIL IC is extremely easy to use since Vltsubgt OUTltsubgt Fltsubgt I Nltsubgt x Vltsubgt C Cltsubgt x VR1 x C2 where VR1 is the resistance between pin 3 & ground & C2 is the capacitance in Farads between pin 2 & ground. Features include ground referenced tachometer whose input interfaces directly with magnetic variable reluctance pick-ups op-amp comparator with floating relays solenoids meters or LEDs etc frequency doubling with low ripple tachometer with built-in hysteresis for either differential or ground referenced input built-in zener for accurate & stable frequency to current conversion & linearity typically plusmn 0.3. Applications include overunder speed sensing tachometers speedometers breaker point dwell meters h&-held tachometers speed governors cruise control touch or sound switches etc. ...
Archived Product
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LM2940CT 1A Low
Dropout Regulator Reg
LM2940CT-50 NSC
£1.42
A positive voltage regulator that can source 1A of output current with a dropout voltage of typically 0.5V & a maximum of 1V over the entire temperature range. A quiescent current reduction circuit has been included which reduces the ground current when the differential between the input voltage & the output voltage exceeds Approx. 3V. The quiescent current with 1A of output current & an input-output differential of 5V is therefore only 3m A. Higher quiescent currents only exists when the regulator is in the dropout mode VIN
- VOUT 3V. Also designed for vehicular applications the device & all regulated circuitry is protected from reversed battery installation or double-battery jump-start scenarios. During line transients such as load dump where the input can temporarily exceed max. VIN the device will shut down to protect its internal circuits & the load. It cannot be harmed by temporary mirror-image insertion. Thermal overload & short-circuit protection is included. Specifications Output voltage 5V typical plusmn 0.15V max. Line regulation 20m V Load regulation 35m V Output impedance 35m W Quiescent current 10m A max. Output noise 150micro V rms Ripple rejection 72d B min. Long term stability 20m V1000 hrs Dropout voltage 0.5V min. Maximum input voltage 26 V Operating temperature range 0 C to 125 C
...
Archived Product
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LM311N LM311N
£0.56
A voltage comparator that has input currents more than a hundred times lower than the 710. It will operate on andplusmn 14V or 5V supplies & will drive RTL DTL TTL MOS & switch voltages up to 40V at currents as high as 50m A. Both input & output can be isolated from system ground & the output can drive loads referred to ground positive or negative. Offset balancing & strobe capability are provided. ...
Archived Product
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LM317 3-Terminal
Adjustable Voltage
Regulators LM317LZ
£0.53

- Output adjustable between 1.25V & 37V
- Internal thermal overload protection
- Internal short circuit current limiting


...
Archived Product
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LM317 3-Terminal
Adjustable Voltage
Regulators TS317CM
£0.76

- Output adjustable between 1.25V & 37V
- Internal thermal overload protection
- Internal short circuit current limiting


...
Archived Product
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LM324N324 LM324N
£0.76
Independent high-gain internally frequency compensated op-amps specifically intended to operate from a single power supply over a wide range of voltages. Application areas include transducer amplifiers DC gain blocks & all conventional op-amp circuits which are designed for single power supply systems. The device will work from standard 5V rails found in digital systems & provide the required interface electronics. in addition the device features a large DC voltage gain 100d B 1 M Hz unity gain bandwidth 120d B channel separation & class AB outputs with virtually no crossover distortion. The device will operate from a 3 to 32 Vdc rail or from a dual plusmn 1.5V to plusmn 16 Vdc supply. ...
Archived Product
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LM334N Adjustable
Current Source LM334N
£1.77
This IC in a TO92 package is a 3-terminal adjustable current source with a 10000 to 1 range in operating current excellent current regulation & a wide dynamic voltage regulation of 1V to 40V. Current is established with one resistor connected between pins 1 R & 3 -V & no other parts are required. The current is equal to 0.0677V divided by the resistor in ohms i.e. for 1m A R 68andohm at 25C. Currents may be set in the range 1andmicro A to 10m A & regulation is 0.02 per volt. Initial current accuracy is andplusmn 3 typical. Reverse voltages of up to 20V will draw only a few microamps allowing the device to act as a rectifier & current source in AC applications. The current is also directly proportional to the temperature at the rate 0.33 per C. Zero drift operation can be obtained by adding one resistor & one diode. Applications include bias networks surge protection low power reference ramp generation LED driver & temperature sensing. ...
Archived Product
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LM335Z Precision
Temperature Sensor
LM335Z
£1.89
An easily calibrated precision temperature sensor whose operation is similar to a zener diode. The device has a breakdown voltage directly proportional to absolute temperature & has a linear output equal to 10m VC. The device operates over a current range of 400andmicro A to 5m A 1m A recommended & even when uncalibrated has a typical temperature error of only 2C over its operating range. When calibrated the error is 1C. ...
Archived Product
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LM337 3-Terminal
Negative Adjustable
Regulator Reg LM337T
NSC
£0.97
An adjustable 3-terminal negative voltage regulator capable of supplying 1.5A over a range of 1.2V to 37V. It is exceptionally easy to use & requires only two external resistors to set the output voltage. Besides having a higher performance compared with fixed regulators the LM337 offers full overload protection with current limiting thermal overload protection & safe area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected. The adjustment terminal can be bypassed with a capacitor to ground to achieve very high ripple rejection ratios that are difficult to achieve with standard 3-terminal regulators. Output voltage is set by connecting a twin resistor divider between output & circuit ground & connecting the adjustment pin to the junction. A precision current regulator can also be made by connecting a fixed resistor only between the adjustment & output pins & connecting the load to the adjustment pin. The device is available in TO220 package LM337T. Specifications Output voltage 1.2V to 37 V Inputoutput differential voltage 40V max. Operating junction temperature 25 C to 125 CLine regulation 0.01 V Load regulation 0.1 Adjustment pin current 50micro A Reference voltage 1.25V typical Output noise 0.003 of Vout Ripple rejection ratio 65d B Long term stability 0.3 125 C ...
Archived Product

LM317 3-Terminal Adjustable Voltage Regulators LM317T


- Output adjustable between 1.25V and 37V
- Internal thermal overload protection
- Internal short circuit current limiting constant with temperature
- Output transistor safe-area compensation
- Floating operation for high voltage applications
-





RIP - This product is no longer available on our network. It was last seen on 15.10.2011

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  • Availability: Out Of Stock
  • Supplier: Maplin
  • SKU: 8067UF27E
Availability: In Stock
£0.76
electronic components Electronic Components
Description Reviews / Comments Add New

Product Description


- Output adjustable between 1.25V & 37V
- Internal thermal overload protection
- Internal short circuit current limiting constant with temperature
- Output transistor safe-area compensation
- Floating operation for high voltage applications
- Eliminates using many fixed voltages
- Output voltage with 4 tolerance The LM317 is an adjustable positive 3-terminal voltage regulator capable of supplying 100m A Order Code RA87U or 1.5A Order Codes UF27E & N61CA over an output voltage range of 1.2V to 37V. These voltage regulators are exceptionally easy to use & require only 2 external reistors to set the output voltage. Both line & load regulation are better than standard fixed regulators. Full overload protection is included on-chip with current limiting thermal & safe area protection. This remains fully functional even if the adjustment terminal is disconnected making it essentially blow-out proof. Order Code UF27E is supplied in a TO-220 style case. Order Code RA87U is supplied in a TO-92 style case. Order Code N61CA is supplied in a TO-263 style case. Specifications Output voltage 1.2V to 37 V Inputoutput differential voltage 40V max. Operating junction temperature-20 C to 125 CLine regulation 0.01 V Load regulation 0.1 Adjustment pin current 50micro A Reference voltage 1.25V typical Output noise 0.003 of Vout Ripple rejection ratio 65d B Long term stability 0.3 125 C

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Jargon Buster

Set - a group of items usually related to one another. Some objects cannot function without the complete set of items.
Adjustable - Something that can be changed or slightly modified to fit.
Junction - A point where two or more things come together, typically used to describe roads
Voltage - A measurement of volts.
Adjustable - Something that can be changed in order to fit better.

Supplier Information

Maplin
The UK's largest supplier of specialist and retail electronics. 172 stores nationwide and online shop, Maplin has over 15,000 products selling everything from MP3 Players and Sat Navs to digital cameras and Computer Equipment.

Trading since 1972 Maplin have a stonrg reputation as a supplier with the expertise and products as chosen by professionals.
Page Updated: 2012-10-13 03:02:54

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