lm27-2plmda National Semiconductor Corporation, lm27-2plmda Datasheet
lm27-2plmda
Related parts for lm27-2plmda
lm27-2plmda Summary of contents
Page 1
... Accurate, 120°C-150°C Factory Preset Thermostat (LM27 in Die Form) General Description This datasheet applies to the LM27A, which is the die form of the LM27. The LM27 is available in the SOT23-5 package. Please refer to the LM27 datasheet for detailed specifications pertaining to the packaged part. ...
Page 2
... For more detailed information on the suffix meaning see the part number template at the end of the Electrical Characteristics Section. Contact National Semiconductor for other set points and output options. Order Number NS Package Number LM27-2PL MDA Die form, no package Connection Diagram Bond Pad Mechanical Dimensions Dimensions of bond pad coordinates are in micrometers ...
Page 3
Pin Descriptions Pin Number Pin Name 1 HYST Hysteresis control, digital input 2 OS Overtemperature Shutdown push- (Note 8) pull active-high thermostat digital output US Undertemperature Shutdown push- pull active-high thermostat digital output 3 OS Overtemperature Shutdown open- (Note 8) ...
Page 4
... Absolute Maximum Ratings Input Voltage Input Current at any pin (Note 2) Package Input Current(Note 2) Storage Temperature ESD Susceptibility (Note 3) Human Body Model Machine Model LM27A Electrical Characteristics The following specifications apply for V limits apply for MIN Symbol Parameter Temperature Sensor ...
Page 5
... Part Number Template The series of digits labeled xyz in the part number LM27-xyz MDA, describe the set point value and the function of the output as follows: The place holders xy describe the set point temperature as shown in the following table. ...
Page 6
... TEMP NOISE CONSIDERATIONS The LM27A has excellent power supply noise rejection. Listed below is a variety of signals used to test the LM27A power supply rejection. False triggering of the output was not ob- served when these signals where coupled into the V+ pin of the LM27A. ...
Page 7
... Typical Applications Note: The fan's control pin has internal pull-up. The 10k pull-down sets a slow fan speed. When the output of the LM27A goes low, the fan will speed up. FIGURE 2. Two Speed Fan Speed Control FIGURE 3. Fan High Side Drive FIGURE 4. Fan Low Side Drive ...
Page 8
... Physical Dimensions for Die Product For Bond Pad Mechanical Dimensions, see Connection Diagram Section www.national.com FIGURE 5. Audio Power Amplifier Thermal Protection FIGURE 6. Simple Thermostat Order Number LM27-2PL MDA Bare Die TOP VIEW 1130µm × 902µm 8 20153022 20153023 20153002 ...
Page 9
9 www.national.com ...
Page 10
... National Semiconductor and the National Semiconductor logo are registered trademarks of National Semiconductor Corporation. All other brand or product names may be trademarks or registered trademarks of their respective holders. ...