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LM2575-5V Step-Down Switching Regulator
- Product Code: 797
- Availability: 3
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LM2575-5V Step-Down Switching Regulator
The LM2575 series of regulators are monolithic integrated circuits ideally suited for easy and convenient design of a step−down switching regulator (buck converter). All circuits of this series are capable of driving a 1.0 A load with excellent line and load regulation. These device is available in fixed output voltage of 5.0 V. These regulators were designed to minimize the number of external components to simplify the power supply design. Standard series of inductors optimized for use with the LM2575 are offered by several different inductor manufacturers.
Since the LM2575-5V DC to DC voltage converter is a switch−mode power supply, its efficiency is
significantly higher in comparison with popular three−terminal linear
regulators, especially with higher input voltages. In many cases, the
power dissipated by the LM2575 regulator is so low, that no heatsink is
required or its size could be reduced dramatically. The LM2575
features include a guaranteed ±4% tolerance on output voltage within
specified input voltages and output load conditions, and ±10% on the
oscillator frequency (±2% over 0°C to 125°C). External shutdown is
included, featuring 80 uA typical standby current. The output switch
includes cycle−by−cycle current limiting, as well as thermal shutdown
for full protection under fault conditions.
Features of LM2575-5V
Output Voltage (Vin = 12 V, ILoad = 0.2 A, TJ = 25°C) Vout Min:4.9V ; Max:5.1 V
Output Voltage (8.0 V ≤ Vin ≤ 40 V, 0.2 A ≤ ILoad ≤ 1.0 A) Vout
TJ = 25°C 4.8 to 5.2 V
TJ = −40 to +125°C 4.75 to 5.25V
Efficiency (Vin = 12 V, ILoad = 1.0 A) η: 77 %
Guaranteed 1.0 A Output Current
Wide Input Voltage Range: 4.75 V to 40 V
Requires Only 4 External Components
52 kHz Fixed Frequency Internal Oscillator
TTL Shutdown Capability, Low Power Standby Mode
High Efficiency
Uses Readily Available Standard Inductors
Thermal Shutdown and Current Limit Protection
Moisture Sensitivity Level (MSL) Equals 1
Pb−Free Packages are Available.
Applications of LM257-5v
Simple and High−Efficiency Step−Down (Buck) Regulators
Efficient Pre−Regulator for Linear Regulators
On−Card Switching Regulators
Positive to Negative Converters (Buck−Boost)
Negative Step−Up Converters
Power Supply for Battery Chargers
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