LM2574N-5.0/NOPB Part Information

Details for LM2574N-5.0/NOPB by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Power Management

Part Description

The LM2574xx series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving a 0.5-A load with excellent line and load regulation. These devices are available in fixed output voltages of 3.3 V, 5 V, 12 V, 15 V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include internal frequency compensation and a fixedfrequency oscillator. The LM2574xx series offers a high-efficiency replacement for popular three-terminal linear regulators. Because of its high efficiency, the copper traces on the printed-circuit board (PCB) are normally the only heat sinking needed. A standard series of inductors optimized for use with the LM2574 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies. Other features include a specified ±4% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. External shutdown is included, featuring 50-μA (typical) standby current. The output switch includes cycle-by-cycle current limiting, as well as thermal shutdown for full protection under fault conditions.

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Part Features

  • 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions
  • 52-kHz Fixed-Frequency Internal Oscillator
  • Adjustable Version Output Voltage Range: 1.23 V to 37 V (57 V for HV version) u00b14% Maximum Over Line and Load Conditions
  • High Efficiency
  • Requires Only 4 External Components
  • Specified 0.5-A Output Current
  • TTL Shutdown Capability, Low-Power Standby Mode
  • Thermal Shutdown and Current-Limit Protection
  • Uses Readily Available Standard Inductors
  • Wide Input Voltage Range: 40 V, up to 60 V for HV Version

Part Specifications

Topology Buck (Step Down)
Input Voltage Min 4V
Input Voltage Max 40V
DC / DC Converter IC Case DIP
No. of Pins 8Pins
Output Current 500mA
Output Voltage Nom. 5V
Switching Frequency 52kHz
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard -
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
Accuracy % 4%
Frequency 52kHz
No. of Outputs 1Outputs
Operating Temperature Min -40°C
Operating Temperature Range -40°C to +125°C
Output Current Max 0.5A
Output Voltage 5V
Primary Input Voltage 12V
Supply Voltage Max 40V
Supply Voltage Min 4V
Termination Type Through Hole
Voltage Regulator Type Step Down (Buck)
RoHS Compliant

Alternative Part Descriptions

  • Step down switching reg 0.5A,LM2574N-5 | RS Components
  • IC, DC/DC CONVERTER, 0.5A; Topology:Buck (Step Down); Input Voltage Min:4V; Input Voltage Max:40V; DC / DC Converter IC Case:DIP; No. of Pins:8Pins; Output Current:500mA; Output Voltage Nom.:5V; Switching Frequency:52kHz; Operating RoHS Compliant: Yes | Newark Electronics
  • Conv DC-DC Single Step Down 4V to 40V 8-Pin PDIP Rail | Avnet America
  • Buck Switch. Reg 5V 500mA 4,75-40Vi DIP8 | Schukat Electronic
  • 8V to 40V, 500mA SIMPLE SWITCHER® buck converter with 4 external components | Texas Instruments
  • Switching controller IC [Texas Instruments] LM2574N-5.0/NOPB Switching controller IC | Distrelec

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