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Bare Die Data Sheet: LM317A

The LM317A is a wide input voltage adjustable 3-terminal voltage regulator delivering 1.5A output current & equipped with internal limiting + thermal shutdown features for overload immunity. Output voltage is set by x2 external resistors.
Guaranteed max. 0.01%/V line regulation. Guaranteed 1% output voltage tolerance. Directly replaces legacy Motorola LM317A,National LM317A, Linear Technology LT317A, ST LM317A and Texas Instruments LM317A.
  • x2 external resistors set output
  • Guaranteed 1.5A output current
  • Adjustable Output 1.2V - 37V
  • Internal Thermal Overload Protection
  • Internal Short-Circuit Current Limiting Constant with Temperature
  • Output Transistor Safe-Area Compensation
  • 80dB ripple rejection
  • 0.01% Line & 0.1% Load Regulation

Application features:

  • The regulator is‘‘floating’’ & sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated providing max input to output differential is not exceeded, i.e. avoid short-circuiting the output.
  • Bypassing the Adjustment terminal achieves higher ripple rejection ratios versus standard 3-terminal regulators.
  • Normally, no capacitors are needed unless the device is more than six inches from the input filter capacitors in which case an input bypass is needed. An optional output capacitor can improve transient response
Silicon Supplies
  Electrical Datasheet

Die Physical Data:
Footprint: 3.016mm² (4674.040mil²)
X: 1630µm (64mil)
Y: 1850µm (73mil)
  Request Pad Layout

In Stock: Available on request
Product Families: Used for this device are tabulated below.
  • Output: Adjustable Output
  • Output Capacitor: Cap Free, Ceramic
VIN (MIN): 4.20V
VIN (MAX): 40.00V
IOUT (MAX): 1.50A
VOUT (MIN): 1.20V
VOUT (MAX): 37.00V
VDO: 2,250mV
Accuracy: 4.00%
IQ: 3.500mA
Noise Figure: 1,110.0µVrms
PSRR @ 100KHz: 38dB
Other Detail: Important information for this device is tabulated below.
Traffic light setting for Minimum Order Quantity indicates the following:
  • Green:Available from stock or at low factory MOQ.
  • Amber: Available on factory order with MOQ.
  • Red: High factory MOQ may apply, please ask for details.
Traffic light setting for High Reliability indicates the following:
  • Green: This bare die is specified and tested for use in high reliability applications.
  • Amber: This bare die can meet higher reliability specifications with additional testing & qualification, please ask for details.
  • Red: This bare die is not specified or specifically designed for use in high reliability applications.
Traffic light setting for Space Grade indicates the following:
  • Green: This bare die is qualified for space applications or has space level qualification data, please ask for details.
  • Amber: This bare die can be specified for space applications with additional testing and qualification, please ask for details.
  • Red: Suitability of this bare die for space applications is unknown and requires further qualification, please ask for details.