L4972:2 A SWITCHING REGULATOR

The L4972A is a stepdown monolithic power switching regulator delivering 2A at a voltage variable from 5.1 to 40V.

Realized with BCD mixed technology, the device uses a DMOS output transistor to obtain very high efficiency and very fast switching times. Features of the L4972 include reset and power fail for microprocessors, feed forward line regulation, soft start, limiting current and thermal protection. The device is mounted in a Powerdip 16 + 2 + 2 and SO20 large 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.

Key Features

  • PWM LATCH FOR SINGLE PULSE PER PERIOD
  • UNDER VOLTAGE LOCK OUT WITH HYSTERETIC TURN-ON
  • SWITCHING FREQUENCY UP TO 200KHz
  • VERY HIGH EFFICIENCY
  • CONTINUOUS MODE OPERATION
  • THERMAL SHUTDOWN
  • RESET AND POWER FAIL FUNCTIONS
  • PRECISE 5.1V ± 2% ON CHIP REFERENCE
  • 2A OUTPUT CURRENT
  • 0 TO 90% DUTY CYCLE RANGE
  • 5.1V TO 40V OUTPUT VOLTAGE RANGE
  • INTERNAL CURRENT LIMITING
  • INPUT/OUTPUT SYNC PIN
  • INTERNAL FEED-FORWARD LINE REG.
Product Specifications
DescriptionVersionSize
DS0067: 2A SWITCHING REGULATOR3.11 MB
Design Notes & Tips
DescriptionVersionSize
DN0011: ST1S03 alternative topology: Using a buck in a negative buck-boost configuration1.1359 KB
Brochures
DescriptionVersionSize
Brochure Power management guide05.20164 MB
Sample & Buy
Part NumberPackagePacking TypeUnit Price (US$) *QuantityECCN (EU)ECCN (US)Country of Origin
L4972APDIP 20Tube2.0331000NECEAR99MALAYSIA
L4972ADSO-20Tube2.0331000NECEAR99MALAYSIA
L4972AD013TRSO-20Tape And Reel2.0331000NECEAR99MALAYSIA
Quality & Reliability
Part NumberPackageGradeRoHS Compliance GradeMaterial Declaration**
L4972APDIP 20IndustrialEcopack1
L4972ADSO-20IndustrialEcopack1 (*)md_z7-wspc-so-wspc-20-wspc-.30-wspc-to-wspc-jedec-wspc-ms-013_a5z7u018ecz-wspc-(l4972ad013tr)-wspc-wcp-wspc-ver2_signed.pdf
md_z7-wspc-so-wspc-20-wspc-.30-wspc-to-wspc-jedec-wspc-ms-013_a5z7u018ecz-wspc-(l4972ad013tr)-wspc-wcp-wspc-ver2.xml
L4972AD013TRSO-20IndustrialEcopack1 (*)md_z7-wspc-so-wspc-20-wspc-.30-wspc-to-wspc-jedec-wspc-ms-013_a5z7u018ecz-wspc-(l4972ad013tr)-wspc-wcp-wspc-ver2_signed.pdf
md_z7-wspc-so-wspc-20-wspc-.30-wspc-to-wspc-jedec-wspc-ms-013_a5z7u018ecz-wspc-(l4972ad013tr)-wspc-wcp-wspc-ver2.xml
2A SWITCHING REGULATOR L4972
circuit_diagram_1362_thumbnail.png L4972
ST1S03 alternative topology: Using a buck in a negative buck-boost configuration L5986
Very low drop voltage regulators with inhibit KFXX
md_z7-wspc-so-wspc-20-wspc-.30-wspc-to-wspc-jedec-wspc-ms-013_a5z7u018ecz-wspc-(l4972ad013tr)-wspc-wcp-wspc-ver2_signed.pdf L4972
md_z7-wspc-so-wspc-20-wspc-.30-wspc-to-wspc-jedec-wspc-ms-013_a5z7u018ecz-wspc-(l4972ad013tr)-wspc-wcp-wspc-ver2.xml L4972