900,000+ datasheet pdf search and download

Datasheet4U offers most rated semiconductors data sheet pdf




National Semiconductor Electronic Components Datasheet

LM2576HV Datasheet

SIMPLE SWITCHER 3A Step-Down Voltage Regulator

No Preview Available !

August 2004
LM2576/LM2576HV Series
SIMPLE SWITCHER® 3A Step-Down Voltage Regulator
General 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 3A load with
excellent line and load regulation. These devices are avail-
able in fixed output voltages of 3.3V, 5V, 12V, 15V, 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 fixed-frequency oscillator.
The LM2576 series offers a high-efficiency replacement for
popular three-terminal linear regulators. It substantially re-
duces 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 guaranteed ±4% tolerance on out-
put voltage within specified input voltages and output load
conditions, and ±10% on the oscillator frequency. External
shutdown is included, featuring 50 µA (typical) standby cur-
rent. The output switch includes cycle-by-cycle current limit-
ing, as well as thermal shutdown for full protection under
fault conditions.
Features
n 3.3V, 5V, 12V, 15V, and adjustable output versions
n Adjustable version output voltage range,
1.23V to 37V (57V for HV version) ±4% max over
line and load conditions
n Guaranteed 3A output current
n Wide input voltage range, 40V up to 60V for
HV version
n Requires only 4 external components
n 52 kHz fixed frequency internal oscillator
n TTL shutdown capability, low power standby mode
n High efficiency
n Uses readily available standard inductors
n Thermal shutdown and current limit protection
n P+ Product Enhancement tested
Applications
n Simple high-efficiency step-down (buck) regulator
n Efficient pre-regulator for linear regulators
n On-card switching regulators
n Positive to negative converter (Buck-Boost)
Typical Application (Fixed Output Voltage
Versions)
FIGURE 1.
01147601
SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation.
© 2004 National Semiconductor Corporation DS011476
www.national.com


National Semiconductor Electronic Components Datasheet

LM2576HV Datasheet

SIMPLE SWITCHER 3A Step-Down Voltage Regulator

No Preview Available !

Block Diagram
3.3V R2 = 1.7k
5V, R2 = 3.1k
12V, R2 = 8.84k
15V, R2 = 11.3k
For ADJ. Version
R1 = Open, R2 = 0
Patent Pending
01147602
Ordering Information
Temperature
Output Voltage
NS Package Package
Range
3.3
5.0
12
15
ADJ
Number
Type
−40˚C TA LM2576HVS-3.3 LM2576HVS-5.0 LM2576HVS-12 LM2576HVS-15 LM2576HVS-ADJ
125˚C LM2576S-3.3
LM2576S-5.0
LM2576S-12 LM2576S-15 LM2576S-ADJ
TS5B
TO-263
LM2576HVSX-3.3 LM2576HVSX-5.0 LM2576HVSX-12 LM2576HVSX-15 LM2576HVSX-ADJ TS5B
LM2576SX-3.3 LM2576SX-5.0 LM2576SX-12 LM2576SX-15 LM2576SX-ADJ Tape & Reel
LM2576HVT-3.3 LM2576HVT-5.0 LM2576HVT-12 LM2576HVT-15 LM2576HVT-ADJ T05A
TO-220
LM2576T-3.3
LM2576T-5.0
LM2576T-12 LM2576T-15 LM2576T-ADJ
LM2576HVT-3.3 LM2576HVT-5.0 LM2576HVT-12 LM2576HVT-15 LM2576HVT-ADJ T05D
Flow LB03
Flow LB03
Flow LB03
Flow LB03
Flow LB03
LM2576T-3.3
LM2576T-5.0
LM2576T-12 LM2576T-15 LM2576T-ADJ
Flow LB03
Flow LB03
Flow LB03
Flow LB03
Flow LB03
www.national.com
2


Part Number LM2576HV
Description SIMPLE SWITCHER 3A Step-Down Voltage Regulator
Maker National Semiconductor
PDF Download

LM2576HV Datasheet PDF





Similar Datasheet

1 LM2576HV SIMPLE SWITCHER 3A Step-Down Voltage Regulator
National Semiconductor
2 LM2576HV 3-A Step-Down Voltage Regulator
etcTI





Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

Site map

Webmaste! click here

Contact us

Buy Components

Privacy Policy