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AMS2576T-XX Datasheet(PDF) 1 Page - Advanced Monolithic Systems Ltd

No. de pieza AMS2576T-XX
Descripción Electrónicos  3.3V, 5V, 12Vand adjustable versions
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Fabricante Electrónico  AMS [Advanced Monolithic Systems Ltd]
Página de inicio   http://www.ams-semitech.com
Logo AMS - Advanced Monolithic Systems Ltd

AMS2576T-XX Datasheet(HTML) 1 Page - Advanced Monolithic Systems Ltd

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3A Step-Down Voltage Regulator
GENERAL DESCRIPTION
The AMS2576 Series are step-down switching
regulators with all required active functions. It is
capable of driving 3A load with excellent line and
load regulations. These devices are available in
fixed output voltages of 3.3V, 5V, 12V and an
adjustable output version.
The AMS2576 series offers a high-efficiency
replacement for popular three-terminal linear
regulators. Also it requires a minimum number of
external components. It substantially not only
reduces the area of board size but also the size of
heat sink, and in some cases no heat sink is
required. The ±4% tolerance on output voltage
within specified input voltages and output load
conditions is guaranteed. Also, the oscillator
frequency accuracy is within ±10%. External
shutdown is included. Featuring 80µA (typical)
standby current. The output switch includes
cycle-by-cycle current limiting, as well as thermal
shutdown for full protection under fault conditions.
This series are offered in 5-pin TO-263,
TO-220 package.
FEATURES
3.3V, 5V, 12Vand adjustable versions
Wide input voltage range, up to 40V
Internal oscillator of 52KHz fixed frequency
Guaranteed 3A output current
Wide adjust version output voltage range
from 1.23V to 37V ±4% max. at over line and
load conditions
Low standby current, typ. 80µA, at shutdown
mode
Requires only 4 external components
Thermal shutdown and current limit
protection
APPLICATIONS
LCD Monitors.
ADD-ON Cards Switching Regulators
High Efficiency Step-Down Regulators
Efficient Pre-regulator for Linear Regulators
Positive to Negative converter (Buck-Boost)
Block Diagram
+
-
1.23V
Band-Gap
Reference
52KHz
Oscillator
+
-
Reset
Current
Limited
Thermal
Shutdown
2
3
Fixed Gain
Error amp. Comparator Driver
3Amp.
Switch
Internal
Regulator
Enable
4
R2
R1
1K
1
5
Feed
Back
+
Vin
Enable
Output
Cout
D1
+
DC Input
L1
AMS2576
1
Advanced Monolithic Systems http://www.ams-semitech.com


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