LM2576HVT-ADJ/NOPB LM2576S-5.0/NOPB Power Regulator IC Switching Voltage Regulators 3A STEP-DOWN VLTG REG
digital voltage regulator ic
,electronic voltage regulator circuit
LM2576HVT-ADJ/NOPB LM2576S-5.0/NOPB Power Regulator IC Switching Voltage Regulators 3A STEP-DOWN VLTG REG
1 Features
- 3.3-V, 5-V, 12-V, 15-V, and Adjustable Output Versions
-
Adjustable Version Output Voltage Range,1.23 V to 37 V (57 V for HV Version) ±4% Maximum Over Line and Load Conditions
-
Specified 3-A Output Current
-
Wide Input Voltage Range: 40 V Up to 60 V for HV Version
-
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
2 Applications
-
Simple High-Efficiency Step-Down (Buck) Regulator
-
Efficient Preregulator for Linear Regulators
-
On-Card Switching Regulators
-
Positive-to-Negative Converter (Buck-Boost)
3 Description
The LM2576 series of regulators are monolithic integrated circuits that provide all the active functions for a step-down (buck) switching regulator, capable of driving 3-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 fault protection and a fixed-frequency oscillator.
The LM2576 series offers a high-efficiency replacement for popular three-terminal linear regulators. It substantially reduces the size of the heat sink, and in some cases no heat sink is required.
A standard series of inductors optimized for use with the LM2576 are available from several different manufacturers. This feature greatly simplifies the design of switch-mode power supplies.
Other features include a ±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.
Device Information
|
PART NUMBER |
PACKAGE |
BODY SIZE (NOM) |
|
LM2576 LM2576HV |
TO-220 (5) |
10.16 mm × 8.51 mm |
|
DDPAK/TO-263 (5) |
10.16 mm × 8.42 mm |
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