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Almog Azulay
9 months ago
Power management
Power management forum
RE: LM337-N: The Output voltage is dropped and not stabilized
The -54 V is power-up when the simulation starts and after that the voltage at a steady state. I measured on parallel resistor (40ohm) 100mA (as it should be in a PCB), and the VOut regulator stays stable. at real PCB Vout it is dropped and No power...
Vadim Utkin
over 1 year ago
Power management
Power management forum
LM337-N: LM337-N
Resolved
Part Number: LM337 - N Hello, dear colleague. We have product LM337IMP/NOPB. There is marking on top
Ryan Eslinger
over 1 year ago
Power management
Power management forum
RE: LM337: About LM337
Hi Yokota, Cadj should be placed in parallel to R2. Below please find an example schematic from the similar
LM337-N
datasheet. The
LM337-N
is a very similar device that was released by National Semiconductor before the TI acquisition. A 10 uF Cadj...
Richard Elmquist
over 4 years ago
Power management
Power management forum
LM337-N: LM337-N Temperature Specifications
TI Thinks Resolved
Part Number:
LM337-N
It seems that the temperature specifications for the LM337T version of this IC changed from -40C to 125C to 0C to 125C between version D of the data sheet and version E. Is this a valid change or was this simply a mistake in the documentation...
Gerard Copeland
over 2 years ago
Power management
Power management forum
RE: LM337L: Ripple rejection performance
Hi Stefan, The
LM337-N
was originally released as a National Semiconductor device while the LM337L was released by TI. Although they have the same part number, they were initially designed by different companies, so it is not safe to assume that they...
Ryan Eslinger
over 1 year ago
Power management
Power management forum
RE: TPS7A4001: TPS7A4001 negative power supply
Hi , TPS7A4001 is designed, characterized, and tested as a positive voltage regulator. LM137 and
LM337-N
are adjustable 3-terminal negative voltage regulators. Since these negative regulators do not have a GND pin, the only limitation is that the Vin...
Ryan Eslinger
over 2 years ago
Power management
Power management forum
RE: TPS7A47-Q1: Linear Regulator
Hi Sergey, Unfortunately we do not have any automotive qualified negative regulators that can meet your input voltage and current requirements. Our closest fit to your application is TPS7A33 which has a typical noise of 16 uVrms. TPS7A33 is commonly...
Gerard Copeland
over 2 years ago
Power management
Power management forum
RE: LM2940C: For Negative voltage
Hi, The LM2940C was designed as a positive LDO voltage regulator with a recommended operating input voltage of 6 V to 26 V. To ensure consistent and reliable operation, this device should not be used with a negative input voltage. The
LM337-N
and...
Howard Zou
over 2 years ago
Power management
Power management forum
RE: LM79: do we have industrial grade(-40 to 85 C) negative LDO?
I find that only
LM337-N
is within comparable price with LM79, but it's not pin to pin. I have customers using LM79 from ST of industrial grade.
Scott Taylor
over 5 years ago
Power management
Power management forum
RE: LM337IMP Output Has 180mV Sawtooth Ripple
Michael, Not sure what you mean by
LM337-N
. All recent designs use the LM337IMP. Some were lead free others not. Yes, adding 100uF is a workable solution. 100uF tantalums have been super glued upside down next to the 10uF ceramics. It does occur to...
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