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N2576S-3.3 View Datasheet(PDF) - Unspecified

Part NameDescriptionManufacturer
N2576S-3.3 52 KHz 3A Step-Down Switching Voltage Regulator (SVR) TO-263, TO220 ETC2
Unspecified 
N2576S-3.3 Datasheet PDF : 5 Pages
1 2 3 4 5
NIKO-SEM
52 KHz 3A Step-Down
N2576
Switching Voltage Regulator (SVR) TO-263, TO220
GENERAL DESCRIPTION
The N2576 Series switching voltage
regulators (SVR) are monolithic integrated
circuits that provide all the active functions
for a step-down (buck) switching regulator,
Both series are capable of driving
3 A load respectively with excellent line and
load regulation.
The N2576 Series SVR include a switching
regulator and compensation network all
within the same package. Just add a choke,
catch diode and two capacitors to obtain an
efficient DC-to-DC converter. The output
switch includes cycle-by-cycle current limit
-ing, as well as thermal shutdown for full
protection under fault conditions.
The N2576 Series SVR offer replacement
for popular 3 terminal linear regulators by
providing higher efficiency with reduced
heat sink size. In many applications a heat
sink will not be required.
FEATURES
z Pin compatible with industry products of
LM2576 Series
z Adjustable output versions
z Wide output voltage range, 1.23V to 27V
for adjustable output version
z DC-to-DC buck converter requiring only 4
external parts
z 52 KHz fixed frequency internal oscillator
z TTL shutdown capability, low power stand
-by mode
z High efficiency
z Uses readily available standard inductors
APPLICATIONS
z Simple high-efficiency step-down (buck)
regulator
z Positive to negative converter (Inverting
Buck-Boost)
z Isolated Fly back Converter using mini-
mum number of external parts
z Powering portable instrument, Set-Top
Box, LCD Monitor, Scanner, I.A, Easy PC
z SMPS Post-Regulator
TYPICAL APPLICATION
8V - 27V
Unregulated
DC Input
1
+Vin
N2576
Cin
+
100uF
3
Gnd
5
On/Of f
4 Feedback
Output
L1
2
100uH
D1
1N5822
+
Cout
1000uF
+5V, 3A
Regulated
Output
R1
6.18K
R2
2K
* VOUT = 1.23V ( 1 + R1 / R2)
Adjustable Regulator in Fixed Output Application
1
MAY-31-2001
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