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NIKO-SEM

N2576T Datasheet Preview

N2576T Datasheet

52 KHz 3A Step-Down Switching Voltage Regulator

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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
wwww.DitahtainShteheet4Us.caomme 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
2
L1
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




NIKO-SEM

N2576T Datasheet Preview

N2576T Datasheet

52 KHz 3A Step-Down Switching Voltage Regulator

No Preview Available !

NIKO-SEM
52 KHz 3A Step-Down
N2576
Switching Voltage Regulator (SVR) TO-263, TO220
ABSOLUTE MAXIMUM RATINGS
z Maximum Supply Voltage
z ON/OFF Pin Input Voltage
z Output Voltage to Ground
(Stead State)
z Power Dissipation
z Thermal Resistance
www.DaJtuanShceteiot4nU.ctoomCase, θJC
30V
-0.3V+VI
-1V
Internally
Limited
2.0°C/W
z Thermal Resistance
Junction to Ambient, θJA
TO-220
TO-263
z Operating Junction
Temperature Range
z Storage Temperature
Range
z Lead Temperature
(Soldering, 10 Seconds)
50°C/W
60°C/W
-40 to 125°C
-65 to 150°C
260°C
ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA = 25°C.)
Parameter
Symbol
Test Conditions
Feedback Voltage
VIN = 12V, VOUT = 5V
VOUT ILOAD = 0.5A (N2576)
Feedback Voltage
Efficiency
Feedback Bias
Current
Oscillator
Frequency
Saturation Voltage
VOUT
η
IB
8V VIN 27V
0.5A ILOAD 3A (N2576)
VIN = 12V, VOUT = 5V
IOUT = 3A (N2576)
VOUT = 5V
FOSC
VSAT
IOUT = 3A (N2576)
Current Limit
ON/OFF Pin Logic
Input Level
ON/OFF Pin Logic
Input Current
ICL
VIH
VIL
IIH
IIL
N2576
VOUT = 0V
VOUT = Nominal Output Voltage
ON/OFF Pin = 5V (OFF)
ON/OFF Pin = 0V (ON)
Typical
Limits
1.230V
1.230V
77%
1.217VMin
1.243VMax
1.193VMin
1.267VMax
50nA
100nA
52 KHz
1.4V
47 KHz (Min)
58 KHz (Max)
1.8VMax
6.0A
1.4V
1.2V
12µA
0µA
4.0A ~ 7.0A
2.2V (Min)
1.0V (Max)
30µA (Max)
10µA (Max)
DEVICE SELECTION GUIDE
Device
N2576S N2576S-3.3 N2576S-5 N2576T
Voltage (V)
ADJ
3.3
5 ADJ
Current (A)
Package
TO-263
TO-263
3
TO-263 TO-220
N2576T-3.3 N2576T-5
3.3 5
TO-220 TO-220
2 MAY-31-2001


Part Number N2576T
Description 52 KHz 3A Step-Down Switching Voltage Regulator
Maker NIKO-SEM
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N2576T Datasheet PDF






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