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MFG:ST  Package Cooled:DIP  

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Part Number: L4972A

 

MFG: ST

Package Cooled: DIP

 

Description: The L4972Aisa stepdownmonolithicpowerswitching regulatordelivering2Aat avoltagevariable from 5.1 to 40...


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L4972A General Description


The L4972Aisa stepdownmonolithicpowerswitching regulatordelivering2Aat avoltagevariable from 5.1 to 40V.

Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiencyand very fast switching times. Featuresofthe L4972A include reset and power fail for microprocessors,
feed forward line regulation, soft start ,limiting current and thermal protection. The device is mountedin a Powerdip16 + 2 + 2and SO20large plastic packages and requires few external components. Efficient operation at switching frequencies up to 200KHz allows reduction in the size and cost of external filter component.

L4972A Maximum Ratings

Symbol Parameter Value Unit
V11 Input voltage 55 V
V11 Input to output voltage difference 50 V
V20 Negative output DC voltage -1
-5		 V
I20 Negative output peak voltage at t = 0.1ms; f = 100KHz Internally Limited V
V1 Voltage at pin 3 and 6 65
V11 + 15		 V
V4,V8 Voltage at pin 2 12 V
V3 Pin 3 sink current 50 mA
I3 Pin 5 source current 50 mA
PTOT Power dissipation at Tcase 90°C 5 / 3.75(*)
1.3/1 (*)		 W
W
Tj, Tstg Junction and storage temperature -40 to 150 °C

L4972A Connection Diagram

L4972A Connection Diagram

L4972A datasheet

L4972A
PDF/DataSheet Download

  • Datasheet: L4972A
  • File Size: 347143 KB
  • Manufacturer: STMICROELECTRONICS [STMicroelectronics]
  • Click here to Download

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